System for application for glue and adhesives

Oct. 6, 1964

G. GERARD

3,152,011

SYSTEM FOR APPLICATION FOR GLUE AND ADHESIVES

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INVENTOR.

BY

ΛΓΓΟΤΜΕΎ

Oct. 6, 1964 _G GERARD 3,152,011

SYSTEM FOR APPLICATION FOR GLUE AND ADHESIVES Filed Feb. 8, 1960 4 Sheets-Sheet 2

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Oct. 6, 1364

G. GERARD

3,152,011

SYSTEM FOR APPLICATION FOR GLUE AND ADHESIVES

Filed Feb. 8, 1960

Sheets-Sheet 3

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Oct. 6, 1964 g. gerard 3,152,011

SYSTEM FOR APPLICATION FOR GLUE AND ADHESIVES

Filed Feb. 8, 1960

Sheets-Sheet 4

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United States Patent Office

3,152,011

Patented Oct. 6, 1964

3,152,011

SYSTEM FOR APPLICATION FOR GLUE AND ADHESIVES

George Gerard, West Point Pleasant, N.J.

(119 Highland Parkway, Roselle, N.J.)

Filed Feb. 8, 1960, Ser. No. 8,474

Claims. (Cl. 118—211)

The present invention relates to a system for the application of glue and adhesives.

In the application of glue and adhesives to paper and other sheet material with applicator rolls obtaining their glue from an open pan or trough, it has been found particularly difficult to achieve a uniform transfer and a uniform application of the glue or adhesive to the sheet material.

The transfer is subject to considerable variation due to changing atmospheric conditions and due to varying glue viscosities, and furthermore, due to the accretion of glue deposits on the machinery and dirt and dust, the amount of glue and adhesive transfer and the condition of the glue and adhesive will vary even over short periods of time.

Furthermore, it is rather difficult to obtain clean applications of desired outline because of the tendency of glue and adhesive to string or feather which becomes particularly difficult at greater speeds of application and where greater production is desired.

In addition, the contamination of the blue and adhesive as the application continues, and the difficulty of mixing and handling the glue and maintaining consistent quality and viscosity as additional quantities are added, involves great difficulty.

It is among the objects of the present invention to provide a novel method of applying glue and adhesive particularly in liquid form by an applicator system with a substantially uniform application, and with the assurance of uniformity from hour to hour, day to day and week to week.

Another object is to provide a novel glue and adhesive application procedure which will produce uniform areas and thicknesses of application of glue and adhesive without stringing or feathering and without change due to varying speeds and which will be effective with much less cleanup time, without waste of glue and adhesive, and which will not be sensitive to or subject to variation due to change of the quality, viscosity or temperatures of the liquid glue or adhesive.

A further object is to provide a novel glue or adhesive apparatus which will be of small size and low cost and of simple construction and which will require a minimum amount of manual supervision and servicing and which may be universally mounted for any angle of application.

Still further objects and advantages will appear in the more detailed description set forth below, it being understood, however, that this more detailed description is given by way of illustration and explanation only and not by way of limitation, since various changes therein may be made by those skilled in the art without departing from the scope and spirit of the present invention.

In accomplishing the above objects, it has been found most satisfactory according to one embodiment of the present invention to provide a porous applicator device which is used as a metering unit through which the glue or adhesive is caused to flow in liquid condition onto the surface of the sheet metal which is to be coated or covered.

Desirably, a porous combination tin and copper block has been found to be most useful for application of glue and adhesive, and it may take the form of a finely divided mixture of tin and copper which has been ground to about sawdust size with the particles thereafter being tumbled until they have become rounded.

The preferred particle size varies from .005 to .025 and desirably, none of the particles should be less than .001 nor should any be larger than .05.

Furthermore, there should be no more than 10% of the particles outside of the preferred range above stated and in the preferred combination 50 to 90% of the particles should have a range of .01 to .02 in size.

These particles after they have been graded to size following grinding of the tin and copper are die cast in broken or cylindrical shape by pounding the dry material into a die and heating until the tin part of the mixture which constitutes between 10 and 30% thereof softens, and acts to bind together the copper particles which normally will take place at a temperature of about 200° to 300° C.

In this way, a rigid mass is obtained which is quite porous and will take the shape of the die, and the porosity of which may be varied by varying the size of the copper and tin particles.

These units are preferably enclosed in slots and recesses in an applicator member.

For example, a glue or adhesive bar may be utilized which is held to a shaft at each end thereof and in the body by long bars or closed clamps.

The shaft may be plugged where glue is not to be applied, and left open with the plugs removed where the glue is to be applied.

It is also possible to utilize applicators which will apply glue entirely against the web of paper or other sheet material.

The glue may be applied in lines lengthwise of the web or transversely of the web as may be desired.

The glue may vary widely in consistency, and it desirably is pumped into the applicator through a strainer at a pressure of about 30 to 50 pounds with suitable pressure reducing valves where lower pressures are to be maintained.

Desirably, the glue is fed into the applicator through a sealed revolving gland and feeds its way through the hollow shaft into the porous metal metering units.

The resistance of the porous metal inserts causes the glue or adhesive to ooze or sweat out of the surface as the machine rotates and applies the glue.

The surface and porosity of the applicator members, and the porous metal inserts therein will measure the amount and thickness of the glue applied.

The amount applied may also be visually controlled by adjusting a pressure control valve and ready adjustment is always available to avoid a spotty application and to avoid a heavy line on the sides or ends of the applicator.

When the machine is stopped, the pump should be desirably shut off to limit the flow to all areas in units and should the stoppage be for a considerable time, as over lunch hour, wet rags should be left over the applicators and the porous inserts.

For overnight stoppage, the glue bars including the porous metal units should be removed and soaked in water or other solvent.

3,152,011

Ο

With the foregoing and other objects in view, the invention consists of the novel construction, combination and arrangement of parts as hereinafter more specifically described and illustrated in the accompanying drawings, wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications can be resorted to which fall within the scope of the claims hereunto appended.

Tn the drawings wherein like reference characters denote corresponding parts throughout the several views:

FIG. 1 is a side elevational view partly in section showing an applicator according to one form of the present invention with a porous insert in position.

FIG. 2 is a transverse sectional view showing the shaft end.

FIG. 3 is a transverse sectional view showing the other shaft end.

FIG. 4 is a transverse sectional view upon the line 4—4 of FIG. 1.

FIG. 5 is a transverse sectional view illustrating an alternative construction with a double bar as compared to the single bar of FIGS. 1 to 4.

FIG. 6 is an end elevational view of an alternative form of applicator.

FIG. 7 is a transverse sectional view upon the line 7—7 of FIG. 6 showing the porous metal applicator units.

FIG. 8 is a transverse sectional view of the shaft end.

FIG. 9 is a fragmentary side elevational view showing the lift arrangement that may be applied with the device of FIG. 6.

FIG. 10 is a fragmentary transverse sectional view of an alternative embodiment.

Referring to FIGS. 1 to 4, there is shown a base stand 10 having the flanges 11 receiving the mounting bolts 12.

Within the base stand is the circular enclosing structure 13 enclosing a split bushing 14.

Within the split bushing 14 is a bearing member 15, and the shaft 16 (see FIG. 1).

A neck structure 17 connects to the upper circular enclosure 18 which receives the cylindrical bearing element 19.

This bearing element 19 carries the shaft 20 having the central opening or flow passageway 21.

As shown in FIG. 2, the shaft 20 is recessed at 22 to form a key way at 23 in FIG. 2.

It is provided with an end plug 24 having the fillister slot 25.

The key way 23 will receive the key 26 (see FIG. 2) which also engages the recesses 27 in the collar member 28 having a reduced diameter at the threaded portion 29 and an enlarged end head portion 30.

The enlarged head portion 30 is provided with a set screw recess 31 by means of which a set screw may be applied across the outer periphery of the end of the shaft 20.

Between the threaded portion 29 and the enlarged head 30 is a smooth reduced diameter surface 32 which receives the ring 33 and carries the outstanding annular member 34 with the semi-circular rounded portion 35.

The member 35 is held in position by the inside annular projecting portion 36 of the ring 37 which has a threaded interior bore 38 and the wrench engagements 39.

The run of the hollow shaft is best shown in FIGS. 2, 3 and 4 in longitudinal section and in part of FIG. 1 in transverse section.

The shaft 20 will carry an enlarged elongated portion 50 which is recessed at 51 to receive an elongated insert block 52.

Over the length of the elongated recess 51 there are positioned a series of radial flow openings 54 opening into the bottom of the recess.

The openings 54 feed into the tapped recesses 55 which may be blocked by the Allen head screws 56« to control the flow of liquid glue from the interior passageway 21 through the openings 54 and 55.

These tapped openings will all be formed in the lower block or bar 52.

Mounted above the lower block or bar 52 will be the upper block or bar 56, and between the blocks 52 and 56 will be the space 58 constituting an intermediate distributing space.

The periphery of this space is sealed by the gasket 59 which fits into the recess 69 in the base of the upper member 56.

This gasket 59 will fit against the flat upper face 61 of the lower bar 52.

The upper bar 56 has a series of spaced liquid glue conducting bores 62 extending radially there through at different spacings as indicated at 63 in FIG. 4 to give a desired distribution pattern.

Above the bore 62 will be an enlarged space 64 opening into the elongated recess 65 (see FIG. 1) into which the porous metal bar 66 is closely fitted.

The ends of the space 64 are sealed by means of the gaskets or brass fillers 67.

The screw or bolt 68 (see FIG. 4) will extend through the porous bar 66.

The brass filler 67 and the bar 56, the gum rubber gasket 59, and the lower bar 52 are held together by the screw or bolt 68 which screw at its lower end is screwed into the tapped socket 69 in the central shaft 20.

It will be noted that the bar 56 will also have a central slot 70 devoid of glue holes.

The other end of the shaft at 80 is of reduced diameter, and it will fit into the recess 81 in the end holder member or bearing member 82.

A set screw opening 83 is provided to enable the unit 82 to be held onto the end 80 of the shaft 20.

The end collar or connection 82 will have a bearing recess 84 receiving the sleeve 85 having the lubricant openings 86.

These lubricant openings 86 will feed said lubricant from the passageways 90 and 88 by way of the grease fitting 89.

The passageway 90 is sealed by the plug 87.

The O-ring 91 in the recess 92 will act as a seal to prevent any liquid glue from leaking out along the surface 93 (see FIG. 3).

Within the sleeve 85 is positioned the inlet pipe 94 through which the glue is forced into the central passageway 21 under pressure by a pump.

The top of the pipe 94 will be stationary inside of the sleeve 85 as the shaft 20 turns.

The end of the pipe or tube 94 has a collar 96 held in position by a brass pin 97.

A seal diagrammatically illustrated may be utilized at 98 in the space 99.

The glue when forced under pressure through the inlet pipe 94 into the open central space 21 will flow through said space and will be distributed by the openings 54 onto the intermediate distributing space 58.

Blocks 56 may be applied to regulate the distribution.

The openings 62 in the bar 56 together with the distributing space 54 will also assure a distribution of glue along the length of the porous metal bar 66 so that as the outer rounded face 100 contacts the web or sheet material, the liquid glue will be applied thereto in uniform amount.

This application will be uniform regardless of the speed of rotation and will depend upon the pressure applied to the tube 94 and to the proportionment resulting from the openings 54 and 55, the distributing space 58, the opening 62 and the distributing space 64.

The applicator face has rounded corners at 101, and the porous bar 64 is held in position without leakage ,by an aluminum solder seal at the edges 102 (see FIG. 1).

The gum rubber gasket 59 is also held in position by means of a rubber cement applied in the recess 60 in the lower face of the bar 56.

In an alternative form shown in FIG. 5, there is shown

3,152,011 a double head bar 125 which has two recesses 126 receiving the porous bars 127 having the oblique flow passages 128 leading to the distribution chambers 129 along the bottom face of the porous bars 127.

The rounded face of the porous bars 127 will give a double application of glue or adhesive to the sheet or web of material as contrasted to the single application of the bar 66 for each revolution of the shaft.

FIGS. 6 to 9 show an alternative arrangement as compared to FIGS. 1 to 5 which may be utilized for applying lines of glue longitudinally of the web or sheet instead of transversely as with the case of FIGS. 1 to 5.

In FIG. 6 there is shown a base structure 150 held in position by the bolts 152.

The base structure 150 carries the sleeve member 153 which in turn receives the bearing which may be a ball bearing 154 within which may be a rubber roll 155.

The top structure 156 above the glue applicator face indicated by the dot and dash line 157 has the upwardly and outwardly extending curved member 158 which has a pivot shaft connection 159 to the eye 160.

The eye 160 carries the ring member 161 and the grease nipple 162.

The ring member 151 has outstanding ears 153 which has a pin or bolt connection 164, and a nut adjustment 165 to fix the position of the lower end 166 which contacts the face 167 of the outstanding frame member 168.

A lower grease nipple is shown at 169.

The shaft 180 as shown in FIGS. 7 and 8 has the reduced diameter end portion 181, and it has a glue feed shown at the right of FIG. 8 which is identical with that shown in FIG. 3.

FIG. 8 also shows the right angle pipe member 182 and its feed pipe 183 connected to the tube or pipe 94.

The openings 184 are all blocked as indicated at 185 by blocks such as shown in FIG. 4 except for a central opening 186 (see FIG. 7).

The opening 186 is enclosed in the double cup member 190 which has the end flanges 188 held together by the screws or bolts 189 and the enlarged cup portions 190 which have the interior space 191 into which glue may be forced under pressure through the pipe 94 into the open space 21 pass the bore 186.

The adjacent edges of the cups will be spaced apart a short distance to form the narrow annular passageway 192 which feeds glue into the distributing space 193.

From the distribution space 193, the liquid glue will pass through the porous ring 194 which is held against the shoulder 195 at the bottom of the recess 196.

The base portions 197 of the cups 190 may receive the tapped openings 198 into which set screws may be placed to fix the double cup 190 onto the shaft 180.

A number of units such as shown in FIG. 7 may be positioned along the shaft 180 to give as many lines of glue as desired.

The seals 199 may be applied to prevent leakage along the shaft surface 200.

If desired, the unit may be made to give double lines of glue by providing two porous metal rings 250 fitting against the shoulders 251 in the recess 252 of the cup member 253.

The two porous ring members are separated by means of the ring 254 having the outstanding shoulders which fit under the porous rings 250.

The arrangement shown in FIG. 10 will give a double line of glue with the glue being fed through the narrow distributing annular passageway 256 into the distribution space 257.

In the alternative form shown in FIG. 9, the elements indicated are the same as indicated in the upper right of FIG. 6 except that there is added a hand lift member 275 having an arcuate lever portion 276 which fits closely along the surface 277 with the surface 278 of the member 168.

There are contacting stop faces 279 and 280.

The upper portion of the lever 276 has an eye 281 receiving the sleeve 282 in which there is a set screw 283.

Projecting from one side of the eye 281 is the plate member 284 by means of which the eye 163 and the ring 5 161 may be lifted.

As shown in FIGS. 1 and 6 along the contact faces indicated by the dot and dash line 157 of FIG. 6 and 49 of FIG. 1, the porous metal bars 66 and 127 of FIGS. 1 and 5 or the porous metal ring 194 of FIG. 7 will apply 10 lines of glue longitudinally or transversely of the web or sheet of paper or other material so that a uniform application is obtained over long periods of time with high speed operation without stringing or feathering.

The porous metal units are not sensitive to the qual15 ity, viscosity or temperature of the glue and will give a uniform application.

There will be no contamination of the glue, and the cleanup time is decreased and the glue will be applied uniformly over the space withont tendency toward ex20 cessive application along the edges and without spotty application.

As many changes could be made in the above system for application for glue and adhesives, and many widely different embodiments of this invention could be made 25 without departing from the scope of the claims, it is intended that all matter contained in the above description shall be interpreted as illustrative and not in a limiting sense.