Moulded panel assembly and fasteners therefor

0001This invention relates to panel assemblies with moulded peripheral casings or gaskets and fastening means for securing such assemblies in supports. More specifically, the invention relates to a panel assembly such as a composite window assembly for vehicles including fasteners which secure the assembly as a unit in a vehicle after moulding.

0002In recent years, window assemblies for vehicles have progressed from individually assembled units built up from separate parts on the vehicle to unitary, modular designs which are completely preassembled as a unit and can be applied as a unit from the exterior of a vehicle in a single operation. Such assemblies provide considerable savings in time and cost. In addition, savings in weight, and thus fuel consumption, for the resulting vehicle have been obtained with such assemblies because of the lighter weight resinous plastic materials which can be used to manufacture the units.

0003Various types of fasteners for securing such modular assemblies to vehicles or other supports have been proposed. Some have included continuous peripheral metal frames as well as individual metal fasteners separately embedded in a moulded casing surrounding the peripheral edge of a window glass and projected through an opening in the vehicle body for securement with fasteners on the interior of the vehicle. Other prior known fasteners have included two parts including some type of anchoring member inserted in the moulded peripheral casing of the window unit and to which an attaching or securing member is glued or otherwise affixed after moulding of the window unit.

0004Problems have been encountered in using the prior known fasteners. In some cases, the fasteners were not securely retained in the moulded casing. In other situations, the fasteners obstructed proper movement of the moulding material in and around the fastener preventing proper embedding. In yet other instances, the fasteners did not provide adequate attachment to the vehicle body. Greater expense was encountered with the above mentioned two piece fasteners which required the extra step of mounting the attaching structure to the anchor in the moulded casing. Such two part constructions also left doubt as to the integrity of the joint between the attaching member and anchor.

0005A related problem was encountered in positioning and locating fasteners in mould assemblies during moulding of the window units. Locating the fasteners to extend from the precise position in the window unit for proper registry with openings in the vehicle body is critical. Many difficulties were found in holding the fasteners in position within a mould cavity after the mould sections were closed and during injection of the moulding material. The pressure of the injected material tended to move the fasteners from their preset locations. In some cases, movement of the moulding material was obstructed such that the fasteners were not properly embedded in the moulded casing allowing them to loosen or pull free from the window unit. This resulted in leakage around the window assembly on the vehicle, removal of the window unit by vandals, or other failure in the attachment of the window to the vehicle. Also, keeping the overall size and complexity of a mould assembly to a minimum while providing for proper positioning and location of fasteners for embedding within the moulded casings of the windows was also desired.

0006The present invention was designed to satisfy the above problems and to provide a strong, secure, properly positionable fastener and resulting panel assemblies including such fasteners for vehicles or other products where moulded panel assemblies are needed.

0007According to a first aspect of the invention a fastener for securing a panel assembly to a support, the fastener being adapted to be embedded in a moulded portion of the panel assembly, is characterised by a base; resilient means on the base arranged to engage a rigid member in the panel assembly to urge the base into sealing contact with a mould during formation of the moulded portion of the panel assembly, and further adapted to retain the fastener in the moulded portion of the panel assembly; and attachment means on the base adapted to secure the fastener and the panel assembly to the support.

0008According to a second aspect of the invention a panel assembly adapted to be secured as a unit to a support is characterised by a panel having a peripheral edge; a casing of moulded material moulded around at least a portion of the peripheral edge, a fastener mounted in the casing, and including a base, resilient means on the base, embedded within the casing and arranged to engage a rigid member in the casing to urge the base into sealing contact with a mould during moulding of the casing, and further to retain the fastener in the casing, and attachment means on the base, exposed to the exterior of the casing, arranged to secure the fastener and the assembly to the support.

0009According to a third aspect of the invention there is provided, in combination with a fastener as defined in the first aspect of the invention, a mould assembly characterised by a pair of cooperating mould sections having facing surfaces and defining a mould cavity; at least one of the mould sections including support means arranged to receive and support a sheet of material therein such that at least a portion of the periphery of the sheet projects into the mould cavity; the other of the mould sections including means adapted to press the sheet against the support means; insertion means adapted for inserting and filling the mould cavity with a flowable moulding material to form a moulded gasket or casing around the portion of the sheet material periphery; and means adapted to hold the fastener within the cavity such that the resilient means of the fastener will be moulded into said moulded gasket portion or casing during moulding.

0010According to a fourth aspect of the invention a mould assembly is characterised by a pair of cooperating mould sections having facing surfaces and defining a mould cavity; at least one of the mould sections including support means arranged to receive and support a sheet of material therein such that at least a portion of the periphery of the sheet projects into the mould cavity; the other of the mould sections including means adapted to press the sheet against the support means; insertion means adapted for inserting and filling the mould cavity with a flowable moulding material to form a gasket or casing around the said portion of the sheet material periphery; and a pocket, adapted to hold a separate part within the cavity, such that at least a first portion of the separate part engages the sheet of material forming a rigid member within the mould cavity to hold the separate part within the cavity, and such that the said first portion of the separate part is so positioned as to be moulded into the gasket or casing during moulding.

0011According to a fifth aspect of the invention a method of moulding a gasket or casing around a peripheral portion of a sheet material is characterised by providing a mould assembly having cooperating mould sections adapted to support the sheet of material therein with a mould cavity into which the periphery of the sheet projects; inserting a separate part into a recess in one of the mould sections prior to closing the mould sections such that the said part is held in the recess with a portion thereof extending into the cavity; closing the mould sections to engage a portion of the separate part with the sheet material to urge the separate part into sealing contact with a part of the recess; introducing into the mould cavity a flowable moulding material to form the gasket or casing around the sheet periphery and to embed a first portion of the separate part in the gasket or casing with a second portion thereof extending out of the gasket or casing, the urging of the separate part into sealing contact reducing or preventing flow of moulding material around the second portion; and then, opening the mould sections and removing the sheet material with the gasket or casing thereon.

0012The following are some optional features of the various aspects of the invention: <ul id="ul0001" list-style="none"><li>A The base includes opposite lateral edges, the retaining means being offset toward one of the lateral edges and the pair of flanges being offset toward the other of the lateral edges. This has the advantage that flow of moulding material along the length of the base past the flanges and retaining means during moulding of the panel assembly is promoted.</li><li>B The base may include a surface adapted to sealingly engage a mould portion during formation of the panel assembly; the projecting means being spaced toward said resilient means from said surface of the base.</li><li>C The fastener may be moulded in one piece from a polymeric material such as acetal resin.</li><li>D The resilient member may be a cantilevered flange which curves outwardly away from the base to a free end and tapers in thickness from the base to the free end. This acts to promote flexing when urged against the rigid member in the panel assembly during moulding thereof.</li><li>E The cantilevered flanges may be spaced apart on the base, and may curve either away from one another or towards one another.</li><li>F The resilient member may be tubular, the axis of the tubular member extending generally parallel to the base. Desirably, the tubular member is generally oval in cross-section, the larger internal dimension of said oval tubular member extending generally parallel to the base.</li><li>G Desirably, the oval tubular member includes opposing sidewalls and a bottom wall spaced from said base, said opposing sidewalls being thinner than said bottom wall. The end surfaces of the tubular member may be sloped inwardly toward one another.</li><li>H The base may extend outwardly around the attachment means and include a surface adjacent the attachment means adapted to sealingly engage a mould portion during formation of the panel assembly to prevent the flow of moulding material around said attachment means.</li><li>I The attachment means of the fastener may include a post for receiving a fastener thereon. Desirably, the attachment means include means for hingedly securing the fastener and any panel assembly to which it is secured to a support. In addition, the attachment means may include an aperture for receiving a fastening member therein.</li><li>J In the aspects in which the invention comprises an assembly, the base may extend around the attachment means; the second side surface of the base having portions exposed at a surface of the casing; the exposed portions of the second side surface adapted to sealingly engage a mould portion during moulding of the casing to prevent the flow of moulding material around the attachment means.</li><li>K In the aspect in which the invention comprises a combination, the means for holding the fastener within the cavity may include suspension means for suspending the fastener within the cavity.</li><li>L Preferably, the pocket means includes a pocket extending into at least one of the mould sections and opening into the cavity for receiving a second portion of the separate part.</li><li>M The pocket means may further include a recess surrounding the pocket and opening into the cavity, the recess having a bottom surface adapted to engage a third portion of the separate part whereby the mould sections are closed, the first portion of the separate part will engage the rigid member within the mould cavity and the third portion of the separate part will tightly engage the recess bottom to prevent the flow of moulding material into the pocket such that the second portion of the portion of the separate part will extend out of the gasket or casing.</li><li>N The recess is wider than the pocket.</li></ul>

0013Accordingly, the present invention provides a panel assembly such as a moulded composite window unit for vehicles adapted to be secured as a unit to a support such as a vehicle body. Each panel assembly may include a panel having a peripheral edge and a casing of moulded material such as polyvinyl chloride or reaction injected moulded polyurethane extending around at least a portion of the peripheral edge of the panel. The assembly may also include fasteners which are securely retained for mounting the assembly to a support, allow proper movement of moulding material around the fasteners during moulding, and enable proper positioning and retention of the fasteners in the mould cavity during moulding of the panel assemblies.

0014In one example, the invention provides a fastener for securing a panel assembly such as a vehicle window assembly or the like to a support, the fastener adapted for embedding in a moulded portion of the panel assembly. The fastener includes a base, resilient means on the base for engaging a rigid member in the panel assembly to urge the base into sealing contact with a mould portion during formation of the moulded portion of the assembly and for retaining the fastener in that moulded portion. Attachment means on the base are also provided for securing the fastener and panel assembly to a support.

0015Preferably, the fastener is moulded in one piece from a polymeric material such as acetal resin and includes retaining means on the base separate from the resilient means for aiding the retention of the fastener in the moulded portion of the assembly and projecting means extending from the base for aiding the location and positioning of the fastener in a mould section during moulding and for aiding in the retention of the fastener in the moulded portion after manufacture. The resilient and retaining means may include various shapes of curved or other flanges which may be tapered for flexing. Alternately, a tubular member extends generally parallel to the base and includes flexible sidewalls which provide resiliency.

0016The resilient means are pressed against a rigid member, such as the panel or window glass itself, in the moulded casing when the mould sections are closed during manufacture. Such pressure forces the base against a surface of the mould to prevent moulding material from covering the attaching means. The result is a fastener which is securely embedded in the moulded casing and having attaching means which extend out of the moulded casing for attachment to the vehicle or other support.

0017In other aspects of the invention, various types of attaching means may be included on the fastener such as a resilient securing member, an upstanding post, an aperture for receiving a fastening member, or means for hingedly securing the fastener and panel assembly to a support. The resilient member is received in a pocket in mould to hold the fastener in proper position during moulding.

0018The present invention therefore provides significant advantages over prior known fasteners for use in panel assemblies and over prior known panel assemblies themselves. First, the fasteners provide for proper embedding and secure retention in moulded casing portions of panel assemblies such as vehicle windows. The resilient means and retaining means on the base of the fasteners allow proper movement of the moulding material therearound for such embedding. In addition, the one-piece fasteners allow secure attachment of the fastener and panel assembly without the need for separate attachment of securing structures by adhesives or the like. The fasteners also allow proper engagement with the mould assemblies as biased by the resilient means to prevent flow of moulding material around the attaching means. In addition, the attaching means and resilient means of the fasteners allow proper positioning, location and retention of the fasteners in the mould cavity during injection of moulding material and to allow proper flow of the moulding material. Moulds may be easily adapted to receive the fasteners of the present invention with minimal preparation or modification while the fasteners themselves remain precisely positioned and include structure to prevent shifting or movement in position within the mould cavities during injection of the mould material therearound.

0019The invention may be carried into practice in a number of ways and several embodiments of a fastener of the present invention and modifications thereof, and several embodiments of a panel assembly of the present invention will now be descirbed, by way of example, with reference to the drawings, in which <ul id="ul0002" list-style="none"><li>Figure 1 is a perspective view of the exterior side of a panel assembly embodying the invention incorporating a first embodiment of the fasteners of the present invention, the panel assembly being of the type forming a window unit for vehicles;</li><li>Figure 2 is a perspective view of the interior side of the panel assembly of figure 1;</li><li>Figure 3 is a perspective view of a first embodiment of the fastener of the present invention;</li><li>Figure 4 is a sectional view of the panel assembly of figures 1 and 2 showing one of the fasteners and taken along line IV-IV of figure 2;</li><li>Figure 5 is a bottom plan view of the fastener of figure 3;</li><li>Figure 6 is a side sectional view of the panel assembly of figures 1 and 2 showing one of the fasteners taken at a right angle to the view of figure 4 along line VI-VI of figure 2;</li><li>Figure 7 is a perspective view of a second embodiment of the fastener of the present invention;</li><li>Figure 8 is a side elevation of the fastener of figure 7;</li><li>Figure 9 is a bottom plan view of the fastener of figures 7 and 8;</li><li>Figure 10 is a sectional view of a panel assembly incorporating the fastener of figures 7-9 showing the fastener from the end;</li><li>Figure 11 is a perspective view of a third embodiment of the fastener of the present invention;</li><li>Figure 12 is a side elevation of the fastener of figure 11;</li><li>Figure 13 is a bottom plan view of the fastener of figures 11 and 12;</li><li>Figure 14 is a sectional view of a panel assembly incorporating the fastener of figures 11-13 showing the fastener from the end;</li><li>Figure 15 is a sectional view of a panel assembly incorporating a modification of the third embodiment of the fastener of the present invention,</li><li>Figure 16 is a sectional view of a panel assembly incorporating a second modification of the third embodiment of the fastener of the present invention;</li><li>Figure 17 is a sectional view of a panel assembly incorporating a third modification of the third embodiment of the fastener of the present invention;</li><li>Figure 18 is a sectional view of a panel assembly incorporating a fourth modification of the third embodiment of the fastener of the present invention;</li><li>Figure 19 is a broken side view of a portion of the fastener in figure 18;</li><li>Figure 20 is a sectional view of a panel assembly incorporating a fifth modification of the third embodiment of the fastener of the present invention;</li><li>Figure 21 is a sectional view of a panel assembly incorporating a sixth modification of the third embodiment of the fastener of the present invention;</li><li>Figure 22 is a perspective view of a fourth embodiment of the fastener of the present invention;</li><li>Figure 23 is a side elevation of the fastener of figure 22;</li><li>Figure 24 is a sectional view of a panel assembly incorporating the fastener of figures 22 and 23 showing the fastener in section;</li><li>Figure 25 is an enlarged sectional view of a mould assembly showing the positioning of the first embodiment of the fastener immeditely prior to injection of moulding material into the mould cavity; and</li><li>Figure 26 is a sectional view of the mould assembly of figure 25 taken at a right angle to figure 25;</li></ul>    Referring now to the drawings in greater detail, figures 1 and 2 illustrate one form of the panel assembly 10 of the present invention incorporating a first embodiment 20 of the fastener of the present invention. The panel assembly 10 is a modular window unit adapted for use in a vehicle and includes a transparent panel 12 of sheet glass which may be planar or curved. A moulded peripheral gasket or casing 14 extends around the entire peripheral edge of the panel 12. The specific window assembly 10 shown in figures 1 and 2 is adapted for use as a rear quarter window of a vehicle and is completely premanufactured prior to installation on a vehicle. It is assembled in one piece as a unit from the exterior of the vehicle over an opening in the body sheet metal of the vehicle. In this case, the moulded casing 14, which may be formed either from polyvinyl chloride or reaction injected moulded polyurethane, includes various ribs extending along the front and rear surfaces. Such ribs are adapted to conform the casing to the shape of the body sheet metal to seal the assembly against the vehicle body to prevent entry of water, dirt and other contaminants between the window and the body. The moulded casing 14 is resilient and somewhat flexible and may be pressed against the body sheet metal to form an effective seal as shown in figures 6, 10 and 14 also allows embedding and incorporation of the fasteners 20 during moulding as described below. The glass used in the assembly 10 is preferably laminated or tempered safety glass and may be tinted or clear as desired. Of course, the shape of the panel or glass sheet may be cut as desired with the peripheral moulded casing 14 formed to such shape and extending along at least portions of the peripheral edge although extension of the casing around the entire perihery is not necessarily required in all instances.

0020The window assembly 10 is designed for permanent installation to provide a window which cannot be raised or lowered. Of course, other forms of the invention may be hinged to the vehicle body for opening or may be incorporated in other structures to allow raising and lowering. As mentioned above, the assembly provides an improvement over the prior known piecemeal assembly methods used for installation of permanently positioned or other windows in vehicles and other structures and allows installation of the window assembly as a unit from the exterior of the automobile or other vehicle with only final securement of a few nuts or other securing means being necessary from the interior to complete the installation.

0021The fasteners 20 are spaced along the inside surface of the moulded gasket 14 such that they will be in registry with openings in the vehicle body sheet metal to allow insertion of the window unit completely from the exterior. As described below, the fasteners 20 resiliently engage the openings in the sheet metal, are compressed to move through such openings and thereafter expand to engage an edge of the openings to retain the assembly securely in place over the vehicle body opening. The fasteners 20 may be incorporated into the moulded casing 14 along with other types of fasteners such as conventionally known headed studs 18 (figure 2) which may be secured directly to the window glass 12 or embedded in the moulded casing using conventionally known methods not forming a part of the present invention.

0022Referring now to figures 3-6, the fastener 20 includes a rectangular, planar base 22. Resilient, flexible flanges 24, 26 extend outwardly from one side of the base at spaced positions adjacent either end with a T-shaped retaining member 28 also extending from the base 22 intermediate the flanges 24, 26. An attaching member 30 extends outwardly from the opposite side of the base 22. The entire fastener 20 is preferably moulded in one piece front a resilient, flexible polymeric material such as acetal resin which has excellent memory and resiliency characteristics, is not water absorbant, and meets the requirements for vehicle manufacturers with respect to resisting environmental conditions such as corrosion and the like.

0023The resilient, flexible flanges 24, 26 curve toward one another from rounded ribs 32, 34 (figure 4) which extend laterally across the base 22. The flanges 24, 26 narrow toward their free ends 36, 38 such that the flanges can flex under pressure within a mould from the position shown in dotted lines to the position shown in solid lines in figure 4. When placed within a mould assembly during manufacture of a window assembly 10, the flanges 24, 26 engage a rigid member within the casing (such as the glass panel 12) to bias and force the base 22 outwardly away from the glass sheet 12 and against a portion of the mould assemby. This forms a seal between the base and the mould assembly to prevent mould material from flowing in and around the attaching member 30. Such sealing contact prevents the attaching member 30 from being embedded within the moulding material and allows it to extend out of the moulded casing for securing purposes. As shown in figures 5 and 6, the resilient flanges 24, 26 have a width substantially less than the width of both the base 22 and the T-shaped retaining member 28. Such lesser width reduces pressure of the moulding material against the fastener which would tend to move the fastener from its proper position in the mould during manufacturing. Such width also aids the flow of mould material along the length of the fastener to allow proper embedding in the moulding material for secure retention of the fastener.

0024As shown in figures 4-6, the T-shaped retaining member 28 includes a substantially square, planar retaining flange 40 extending at right angles to a support flange 42 which joins the flange 40 to the base 22 at the centre of the base. The flanges 40, 42 extend the full lateral width of the base 22 to provide a maximum, retention area. The ends of the flange 40 extend outwardly from the flange 42 substantially parallel to the base 22 but are spaced from the base by the length of flange 42. This provides an area for filling with mould material while the parallel extension provides maximum retaining strength when embedded in the moulding material. The base 22 is further reinforced by a longitudinally extending rib 44 which extends between the insides of the flanges 24, 26 and the inside surfaces of the flange 42 as shown in figures 4-6. The overall height of the retaining member 28 is less than the height of the flanges 24, 26, either in their free state or when compressed by the mould assembly as shown in figured 4 and 6. Hence, the retaining member 28 does not engage or touch the glass 12 but is merely firmly embedded within the moulding material to help retain the fastener in place in the assembly 10.

0025Location and positioning of the base 22 and the entire fastener 20 in a mould and retention of the fastener within the moulding material are aided by extending pins 46 which project outwardly from the lateral side edges of the base 22 at four spaced positions aligned with the ribs 32, 34 as shown in figures 3-6. The cylindrical pins 46 are spaced below the top surface of the base 22 from which the attaching member 30 extends. This allows the moulding material to flow around the pins and enclose and embed them as shown in figure 6 to aid the retention of the fastener within the moulded casing 14 As shown in figures 3, 5 and 6, the ends of pins 46 are rounded and are adapted to be engaged by surfaces of the mould assembly properly and precisely to locate and position the fastener and base 22 during moulding.

0026The attaching member 30 includes an upstanding post or support 48 and a pair of flexible, resilient attaching arms 50 extending from opposite sides of the post 48 generally along the longitudinal centreline of the base 22. The arms 50 thus extend longitudinally of the base 22 and downwardly toward the base but outwardly away from the post 48. The post 48 is generally rectangular in section although it tapes toward its outer end from the area at which it contacts the base 22 as is shown in figure 6. Th arms 50 taper slightly outwardly from their areas of connection to the post 48 and terminate in a series of serrations or shoulders 52 extending across the free end of each arm as is best seen in figures 3 and 4. The serrations 52 engage the edges of an aperture or recess formed in the vehicle body sheet metal S (figure 4) of a vehicle when the window assemby 10 is installed. The serrations 52 prevent withdrawal of the window unit from the vehicle body unless the arms 50 are purposely flexed or compressed toward the post 48 such that they will fit through the opening in the sheet metal S. However, when the window assemby 10 is inserted through such openings, the angled extension of the arms 50 toward the window assembly automaticaly cams and flexes the arms inwardly towards the post 48 and the base 22 as the window assemby is forced toward the body sheet metal S. After passing through the sheet metal opening, the natural resiliency of the fastener 20 causes the arms 50 to snap back outwardly to their free state position. This allows the serrations 52 to engage the edge of the aperture inthe sheet metal to retain the unit in place. The unit is thus held with the moulded casing 14 in tight engagement with the contoured sheet metal S.

0027Referring now to figures 25 and 26, the fastener 20 is shown prepositioned in a mould assembly prior to closing that assembly for the formation of the moulded casing 14 around the glass 12. A typical mould assembly includes a pair of mould sections 60, 62 with a pocket or slot for receiving the fastener 20 prior to loosing of the moulds. The pocket or slot includes a recess or pocket 64 which is slightly wider than the width of the attaching member 30 and is slightly deeper than the overall height of the member 30. A wider and longer but shallower stepped portion 66 of the pocket or slot for receiving the fastener 20 communicates with the pocket 64 to receive the base 22 and the locating, positioning pins 46. The surface of the base 22 from which the attaching member 30 extends contacts a bottom surface 67 of the pocket portion 66 while the pins 46 engage the sides 68 of that pocket portion. The flexible, resilient arms 50 are slightly compressed by the length of the pocket portion 64 which is slightly less than the overall dimension of the attaching member 30 measured across the arms 50 at their widest point in their free state. The resiliency of the arms 50 holds the fastener within the pocket while the base 22 is securely and properly positioned by the locating and positioning pins 46 as described above.

0028After the fasteners 26 are positioned within one mould section, the mould sections are closed to from a mould cavity C (25) with the opposite mould section 62 pressing the glass 12 against the resilient, flexible flanges 24, 26. Such pressure when the mould sections are closed forces the base 22 tightly into sealing contact with the surfaces 67 of the mould pocket 66. As the moulded sections are completely closed, the flanges 24, 26 are compressed since the overall depth of the cavity C including the glass 12 is less then the combined thickness of the base 22, the flanges 24, 26 and the glass 12 when in contact with one another. However, if the depth of the pocket 64 is too small, the height of the attaching member 30 will prevent the base 22 fom sealingly engaging the surface 67 or causing over compression and failure of the flanges 24, 26. The compression of the flanges 24, 26 flexes them inwardy toward one another and retaining the member 28 as shown in figures 4, 6 and 25. The natural resiliency of the fastener 20 biases and urges the base 22 tightly against the surfaces 67 of the pocket 66 to prevent moulding material injected into the cavity C from flowing around the base into the pocket 64 which would otherwise embed and envelope the attaching member 30. Preferably, the biasing force against the surface 67 is about 25-30 pounds (111 to 133N). Such force depends on the material shape and size of the flanges 24, 26. Too little pressure from incorrectly sized flanges will allow leakage of mould material around the base 22. Too great a pressure could prevent mould closure, or break the glass 12 or the fastener itself. Hence, with proper pressure, the embedding of the attaching member 30 is prevented such that it extends out of the moulded casing 14 as manufactured. The pressure of the moulding material flowing into cavity C also helps force the base 22 tightly against surfaces 67. The moulding material embeds the pins 46, the flanges 24, 26 and the retaining member 28 to securely retain the fastener in the window assemby while leaving the top of the base 22 flush with and exposed at the exterior surface of the mould material.

0029Of course, the fastener 20 may press against another rigid member within the assembly when the mould is closed other than the glass 12 to press the base 22 tightly against a mould surface. Other rigid members may include sheet metal parts or other members.

0030Referring now to figures 7-10, a second embodiment 70 of the fastener is illustrated. The fastener 70 is also designed to be incorporated by moulding into a window unit or other panel assembly 10a as shown in figure 10 such that it extends from a moulded casing 14a for attachment purposes. The fastener 70 includes a different combination of resilient flanges and a retaining member as well as a different type of attaching member.

0031As is best seen in figures 7-9 the fastener 70 is preferably moulded in one piece from acetal resin and includes a base 72 which is planar and rectangular. Resilient, flexible flanges 74, 76 curve outwardly away from the base toward the ends of the base opposite to the direction of curvature of the flanges 24, 26 in the fastener 20 and become thinner or narrow toward their free ends to allow them to flex under pressure As in the fastener 20, the flanges 74, 76 extend from protruding ribs 78, 80 extending laterally across the bottom surface of the base 72. Locating and positioning pins 82 are reduced diameter extensions of the ribs 78, 80 at the lateral edges of the base 72.

0032At the centre of the base 72, intermediate the flanges 74, 76, is a gull-wing shaped retaining member 84 joined to the bottom surface of the base 72 at 86 and having outwardly curved retaining flanges 88 extending therefrom. The flanges 88 become thinner or narrow toward their free ends 89 to allow those flanges to flex like the flanges 74, 76 and include portions at the ends thereof which are generally parallel to the extent of the base 72 but are spaced from the base to allow proper embedding and retention in the moulded casing of a window unit. Strengthening ribs 90 extend laterally across the base 72 beneath the flanges 88 as shown in figures 8 and 9.

0033On the opposite side of the base 72 from the flanges 74, 76 and the retaining member 84, is an upstanding attaching member 92 including a generaly U-shaped flange having outwardly extending flange portions 94, 96 tapering to free ends at which a resilient, flexible securing flange 98 is joined as shown in figures 7, 8 and 10. The flange portions 94, 96 taper to a thinner section at their outer ends while the flanges 98 has a uniform, thin thickness. An opening 100 extends between the flange portions 94, 96 and into a portion of the flange 98 which includes a series of serrations 102 adapted to engage and secure the flange to the edge of the body sheet metal S of a vehicle as shown in figure 10. One side of the flange 98 includes an elongated serration or tab 104 which engages the end surface of the sheet metal as shown in figure 10. Engagement of the sheet metal edge may be by any of the serrations 102 of the flange 98. The tab 104 is sufficiently long such that it will engage the end surface of sheet metal S but will not move past the sheet metal edge. Thus, the fastener flange 98 is not positioned completely on one side of the sheet metal. This prevents the flange from being bent backwards should the assembly 70 be pulled outwardly and maintains greater holding strength for the fastener.

0034As will be understood from figure 9, the retaining member 84 is offset from the centreline of the base 72 such that one edge is aligned with one lateral edge of the base. The resilient flanges 74, 76 are offset in the opposite direction toward the oppostie lateral edge of the base 72 such that their edges are in alignement with the opposite edge of the base. The flanges 74, 76 thus are aligned with the glass 12a when positioned in a window unit (figure 10). Such offsetting also facilitates flow of the moulding material along the base from end to end and facilitates embedding of these members within the moulding material for secure retention in the window unit.

0035Moulding of the fastener 70 into a window unit 10a in figure 10 is accomplished substantially in the same way as for the fastener 20 using mould sections with a fastener receiving pocket of stepped type of similar configuration. The flanges 74, 76 are adapted to be compressed against the glass pane 12a or other rigid member to urge the top surface of the base 72 against surfaces of the mould section around the attaching member 92 to prevent flow of moulding material as described above in connection with the fastener 20 in figures 25 and 26. The overall height of the gull-winged retaining member 84 is the same as the free or compressed heights of the flanges 74, 76 to assure contact with the glass 12a by all those members when the mould sections are closed. The flange 98 is sufficiently flexible to flex inwardly toward the flange portions 94, 96 to allow the attaching member 92 to be pressed into a mould pocket such as that at 64 in figures 25 and 26 to hold the fastener in the mould cavity. In the completed assembly, the serrations 102 of the flange 98 can move past the edge of the body sheet metal S. One portion of the flange 98 expands to its normal, free state with the tab 104 engaging the edge of the body sheet metal and the serrations 102 engaging the back surface of the sheet metal. The flange 98 is thus slightly flexed while retaining the fastener and the panel assembly securely in place a shown in figure 10.

0036Similarly, the pins 82 locate and position the base 72 in a stepped pocket portion the mould assembly such as that at 66 in figures 25 and 26 to prevent movement of the fastener during injection of the moulding material into the mould cavity. The pins 82 also aid retention of the fastener in the moulded casing 14a after manufacture since they are spaced below the top surface of the base 72 from which the attaching member 92 extends and are enclosed in the casing.

0037In figure 11-14, a third embodiment 110 of the fastener is illustrated. A fastener 110 is preferably moulded in one piece from acetal resin and includes a rectangular, planar base 112 with a resilient, flexible tubular retaining member 114 formed on one side of the base. An upstanding attaching member 116 extends from the opposite side of the base. The tubular member 114 combines the functions of the resilient flanges in the fasteners 20 and 70 with the function of the retaining members 28, 84 in those fasteners. Thus, the resilient member 114 not only flexes to the force base 112 against a mould section pocket to present flow of moulding material around thee attaching member 116, but also retains the fastener 110 embedded within the moulded casing portion 14b of a modular window unit 10b as shown in figure 14 and described below.

0038The tubular member 114 is oval in section, has an axes generally parallel to the base, and includes sidewalls 118, 120 and a bottom wall 122. The largest dimension of the tube is generally parallel to the base. The sidewalls 118, 120 are thinner in section than the thickness of the bottom wall 122 to facilitate flexing of the tubular member into a flatter, more oval shape than its normal free state when engaged by the mould sections and pressed against glass sheet 12b during moulding of a window assembly (see figure 14). The end surfaces 124 of the tubular member 114 are slanted inwardly toward one another to facilitate flow of moulding material through the tubular member and around its ends.

0039The base 112 of the fastener 110 also includes laterally extending locating and positioning lugs 126 which extend about one-third of the distance along opposing side edges of the base. The elongated lugs 126 perform the same function of positioning the base 112 in a mould assembly pocket during manufacturing as do the pins 46 in figure 26 but are enveloped and embedded within the moulding material after manufacture as shown in figure 14 to help retain the fastener in place in the assembly.

0040The attaching member 116 is substantially similar to the attaching member 92 in the embodiment 70 of the fastener except that it does not include a deep opening 100 in the upstanding support flange 117 thereof as in the embodiment 70. It does include a thin, flexible securing flange 119 with serrations 121 and a tab 123, however, similar in function to the flange 98 with the serrations 102 and the tab 104 in the embodiment 70. Accordingly, when positioned within a mould cavity as described in connection with figures 25 and 26, the fastener 110 is embedded in the same manner with the tubular member 114 compressed by the mould sections against glass 12b or another rigid member in the assembly to urge the base 112 against a portion of the fastener receving pocket in one mould section. This prevents flow of moulding material around the attaching member 116 such that it will extend from the inside surface of the moulded casing 14b as shown in figure 14 for engagement with the vehicle body sheet metal S to retain the fastener and window assembly in place on the vehicle. The top surface of the base 112 is again flush with the surface of moulded casing 14b with the lugs 126 and the tubular member 114 firmly surrounded and embedded within the mould material with the tubular member 114 in its compressed state after moulding.

0041Referring now to figures 15-21, several modified versions of the fastener embodiment 110 are illustrated which incorporate different varieties of attaching members used to secure the fastener and panel assembly to a vehicle body after manufacture. In each of the fasteners shown in figures 15-21, the base, the resilient tubular member and the side lugs extending from the lateral edges of the base are the same as those shown in embodiment 110 of figures 11-14. The difference in the various embodiments is in the attaching members which extend from the side of the base opposite the tubular member embedded in the casing 14. Each of the fasteners in Figures 15-21 which is embedded within a casing 14 of the various window units shown therein may be moulded from resinous material such as the acetal resin.

0042In figure 15, an embodiment 130 of the fastener includes a truncated concical fastener receiving socket member 132 moulded to extend outwardly from a base 131. The socket member 132 has a cylindrical bore 133 for receiving a retaining screw 134 inserted therein from the inside of the vehicle through an opening in sheet metal S when the window unit is placed over the opening in the vehicle body. A locking washer 135 may be included between the head of the fastener 134 and the sheet metal for secure retention.

0043In figure 16, an embodiment 140 of the fastener includes a cylindrical, threaded post or stud 142 moulded integrally with and extending outwardly from a base 141 through an opening in the vehicle sheet metal S for receipt of a nut or other fastener 143 and a washer 144 to retain the assembly in place.

0044In figure 17, an embodiment 150 of the fastener includes cylindrical, smooth sided post or stud 152 extending outwardly from a base 151 through an opening in the vehicle body sheet metal S for receipt of a self-threading nut 153 or other like fastener which is secured over the cylindrical post.

0045With reference to figures 18 and 19, an embodiment 160 of the fasteners includes a hinge member for hingedly securing the fastener and window assembly to another member in a vehicle. Thus, a hinge flange 162 extends outwardly from a base 161 and includes an aperture 163 extending therethrough for receipt of a hinge pin or the like for pivotal securement of the fastener and window assemby to another support member.

0046In figure 20, an embodiment 170 of the fastener includes a cylindrical socket member 172 extending outwardly from a base 171 and including a bore 173 having a pair of oppositely located J-shaped securing slots 174 extending from the outer edges of the socket. The bore 173 receives a cylindrical sleeve 176 of an eye fastener 175. The sleeve 176 includes cylindrical lugs 177 at diametrically opposed positions for receipt in the J-slots 177 to hold the eye member in the bore 173. The eye fastener 175 is received through a washer 178 and an opening in the sheet metal S to secure the fastener and window unit in place.

0047In figure 21, the portion of a fastener combination 180 illustrated therein which is embedded within the casing 14 of the window unit is identical to that in the embodiment 170 and includes the cylindrical socket member 172 extending from the base 171 and having similar J-shaped slots 174 therein. In the embodiment 180, however, a larger diameter tubular sleeve 182 having internal cylindrical lugs 184 extending from diametrically opposed positions therein is received over the socket 172 with the lugs 184 fitted in the J-slots 174 to hold of the two parts together.

0048A further embodiment 190 of the present invention is shown in figures 22-24 and includes a rectangular, substantially planar base 192 with a combined resilient, retaining member of a gull-wing shape extending from one side of the base. A cylindrical securing or attachment socket 196 extends from the opposite side of the base. A resilient retaining member 194 includes a pair of curved, resilient, flexible flanges 198, 200 curving upwardly and outwardly away from one another from the base 192 such that the outer ends are substantially parallel to the base 192 but spaced therefrom as shown in figure 23. The flanges 198, 200 taper toward their free ends for flexibility as shown in figure 23. The cylindrical socket 196 extending from the opposite side of the base includes a cylindrical bore 202 extending therethrough and partially through the base 192.

0049With reference to figure 24, the resilient retaining flanges 198, 200 are offset toward one lateral edge of base 192 for alignment with the glass sheet 12d against which those flanges are pressed when the mould sections are closed as described above. When embedded within the moulded casing 14d after manufacture, a portion of the base 192 extends laterally into the casing 14d beyond the edge of the glass 12d while the socket 196 extends out of the casing toward the body sheet metal of a supporting vehicle. Before installation in a vehicle, a threaded post 204 or other securing member may be inserted into the bore 202 such that the post will extend through an opening in the sheet metal for receipt of a nut 206 or other fastener to hold the window unit against the vehicle body. Since the socket 196 is not resilient or flexible and therefore cannot hold the fastener in a pocket or slot as with the other fasteners described above, other known means for holding the fastener in the mould assembly or for adhering it lightly in a proper position may be used with the fastener 190.

0050Accordingly, the present invention provides numerous embodiments of a fastener uniquely designed to allow proper positioning and location within a mould assembly during manufacture of a moulded window assembly and strong, secure retention in the moulded portions of such an assembly after manufacture. The resilient means incorporated in the fastener prevent flow off mould material around the attachment members which extend from the completed moulded casings and which would otherwise be embedded and totally enclosed in a moulding material using prior known fasteners.