Drum with removable lid

The invention relates to a cylindrical blow molded barrel with a lid having a wide neck and a clamping ring closure, the U-shaped clamping ring in the closed state overlapping the upper outer rim of the lid with its upper limb and its lower lower rim.

179 The 646 arm extends under a substantially horizontal or slightly obliquely downwardly sloping outer edge in the area of ​​the barrel body outlet.

A barrel of this type with a lid, for example, is known from DE-B-41 08 606. In this barrel, however, the closure by a clamping ring is arranged at a distance under the upper edge of the lid or barrel outlet, and for this reason a filled barrel with a lid is handled, when the barrel has a capacity of, for example, 220 liters and a transport weight of about 230 kg, it is only possible with special gripper tools for barrels. This type of barrel with a lid. The Mauser was developed in 1975 and distributed worldwide under the name Standard-DeckelfaB - a standard barrel with a lid. This barrel is perfectly suitable for use with particulate solids or pasty substances, but not for liquid substances.

In the case of covered barrels, the sealing effect of the barrel cover on the barrel outlet opening is achieved by applying an axial pretension in the cover seal due to the bevels of the clamping ring legs at the top edge of the lid and at the outer rim of the barrel body (or recess) when the clamping ring is fastened or closed.

Casks with a lid, which are approved for use, for example, in the chemical industry, have specific requirements regarding the safety of their storage and transport, which are checked and tested in special application acceptability tests (e.g. falling sideways = falling on a wall, cover edge, static internal pressure test and others). In the case of barrels with a lid made of plastic, known to date, already when the barrel is dropped from a height of about 1.20 m, e.g. from the loading surface of a truck, the barrel becomes impermeable, especially when the barrel contains a liquid substance or even completely jumps back. barrel covers.

Known barrels with a lid in particular suffer from the following disadvantages, namely with the axial internal pressure acting on the barrel lid (impact pressure of the liquid when falling against the wall of a water-filled barrel or at the hydraulic internal pressure of a closed barrel), when the closed barrel falls flat on the barrel. side wall (falling against a wall) and when a closed, water-filled barrel falls diagonally over the edge of the cover, various effects occur, e.g. the barrel cover is pushed axially outwards, the clamping ring is pulled axially outwards, the clamping ring (together with the lid and the drum outlet area) is flattened in the center of the impact site, the clamping ring is strongly crushed on the side of the impact site, and its cross-section at both bend points the transverse one takes the shape of a more obtuse U letter, the edge of the cover tries to slide out from under the upper arm of the clamping ring, gasket preload is reduced and the clamp system is no longer tight.

The deformation loads must in any case be absorbed by the U-shaped clamping ring. The arms are thereby subjected to outward pressure in the bending regions (they expand). If the loads acting on the arms are too high, they lead to permanent deformations, the pre-stress of the gasket in these places is reduced, and larger extensions of the arms cause loss of tightness or leakage from the barrel.

It is therefore desirable by design measures to reduce the deformation of the clamping ring, in particular the expansion in the U-shaped cross-sectional area, in particular at the barrel outlet area, at the barrel cover and / or at the clamping ring, while maintaining easy handling conditions, i.e. easy handling. closing the clamping ring.

The aim of the present invention is to provide a plastic barrel with a lid and a clamping ring closure, which, thanks to the special interplay of individual components, allows the use of the same tool for gripping barrels (parrot's beak), or in the filled state it can be manipulated with the same tool for grabbing barrels, which is generally available and used for modern plastic drums with an L-shaped ring fitted with a spigot or for normal steel drums

179 646 spigot barrels. The barrel with a lid should in particular be suitable for use with liquid substances, i.e. even in the event of a fall from greater heights, the liquid tightness should still be maintained.

According to the invention, this object is achieved thanks to the fact that the barrel cover directly behind the outer rim of the cover, which is overlapped by the upper arm of the clamping ring, has a U-shaped cross-section in which the cover gasket is inserted, and the middle one is made with a reduced diameter. with the cover disc and the rim of the cover, there is a circumferential, gripping groove having a substantially V-shape recessed in the barrel body, and a flat bottom, on the inside, the gripping groove is delimited by a preferably oblique, conically upward, annular part to which the flat cover plate is connected, while the lower arm of the clamping ring enters the recess in the upper wall of the barrel just below the upper edge of the barrel, which recess is delimited at the top by a substantially horizontally extending barrel edge or a diagonally extending support surface for the clamping ring, and which extends downward to a completely cylindrical portion of the barrel wall is substantially conical, increasing at a slight inclination angle, the transition from the conical region to the completely cylindrical part of the barrel is spaced from the upper leading edge of the barrel outlet edge, and the upper edge of the barrel mouth is solid and provides a support or sealing surface for the cover gasket and has a width (thickness) equal to at least twice the thickness of the barrel body wall.

The distance between the transition from the conical region into the fully cylindrical part of the barrel body and the upper leading edge of the barrel mouth edge is preferably 80-140 mm, more preferably 120 mm.

Due to the special design of the upper outer area of ​​the barrel according to the invention with a lid, it is possible, on the one hand, to use tools for gripping barrels commonly used for spigot barrels, and on the other hand, the barrel according to the invention with a lid, also when filled with liquid substances, has a much better liquid tightness, e.g. in the event of a fall. barrels from greater heights (about 1.8 m) or during the approval tests described above.

In one embodiment of the invention, the conical section of the barrel wall inside the recess below the horizontal abutment surface for the lower leg of the clamping ring to transition into the fully cylindrical part of the barrel body extends at an acute angle of 15-30 °, preferably 18-20 ° to the longitudinal axis of the barrel. As a result, the barrel gripper can simply be brought first to the cylindrical barrel body, and then lifted by moving it up into the recess, until the lower claw of the gripper touches the arm of the clamping ring adjacent to the horizontal contact surface of the barrel rim and due to the resistance, the upper claw of the barrel gripper it will automatically tilt inwards and jam, so the barrel will be firmly gripped and can be transported.

In order to ensure good seating of the lower limb of the clamping ring and the drum gripper claw to be attached there, it is provided according to the invention that the ratio of the depth of the recess measured in the radial direction to the diameter of the cylindrical part of the barrel body is 0.021-0.043, preferably 0.029, which is due to the fact that the depth the recess in the radial direction, measured from the extension line of the completely cylindrical part of the barrel body, is 12-25 mm, preferably about 17 mm. At the same time, the oblique edge of the barrel, which is the contact surface for the lower leg of the clamping ring and at the same time the upper end of the recess, is provided at a distance from the upper barrel edge in the outer wall of the barrel body. The distance is approximately 10-20 mm, preferably 15 mm.

Permanent support for the clamping ring as well as for the added barrel gripper is further achieved by the fact that the upwardly facing area of ​​the barrel mouth edge or the vertical bridge has a sealing surface for a gasket in the form of a smooth convex surface having a circular arc contour, serving as a sealing surface for the lid gasket. .

179 646

According to the invention, from the outside, at the barrel edge, a circumferential, radially protruding narrow flange is provided with an increase in the width of the horizontal contact surface for the lower leg of the clamping ring. The width of the flange measured in the radial direction is approximately 3-5 mm.

The barrel body according to the invention, at the bottom, in the area of ​​the transition from the cylindrical wall of the barrel to the barrel bottom, has a circumferential massive bottom rolling ring with a bottom trapezoidal cross-section and a slender bridge connection with the barrel body, this bottom rolling ring having almost the same outer diameter as the installed ring clamp when closed.

Preferably, the barrel with the cover and clamping ring in place has a barrel height to barrel diameter ratio of about 1.57.

Preferably, the barrel with the lid and clamping ring in place has a barrel height to barrel diameter ratio of about 1.82.

Preferably, the barrel with the cover and clamping ring in place has a barrel height to barrel diameter ratio of about 1.06.

Preferably, the barrel with the lid and clamping ring in place has a barrel height to barrel diameter ratio of about 1.49.

Preferably, the barrel with the lid and clamping ring in place has a barrel height to barrel diameter ratio of about 1.55.

Preferably, the cylindrical portion of the barrel body is at least three-quarters of the total height of the barrel with the lid.

The conical section of the barrel wall inside the lower recess above the bottom roller until the transition upwards into the completely cylindrical part of the barrel body runs at an acute angle of 15-30 °, preferably 18-20 °

Preferably, the top of the barrel cover on both sides symmetrically to the side at the trunnion or at the trunnion cover is inclined, the bevel extending outward to the raised center disk portion of the cover as far as the shoulder or the beginning of the inner annular flange or up to the inner flat edge of the gripping groove.

Preferably, two spaced apart annular flanges are provided on the underside of the barrel cover in its outer region, the axial width of these annular flanges facing towards the barrel body being between 0.5 and 2 times the distance between the flanges, and preferably is equal to him.

Preferably, an opening is provided in the inner annular flange and / or in the outer annular flange immediately in front of the outlet bore.

Preferably, the holes in the annular flanges extend obliquely towards the plug hole and are inclined more steeply towards the plug hole than the chamfer, and the lowest point in the upside down position is at the outer edge of the plug hole.

Preferably, in the upside down position, immediately in front of the plug opening, on the inside there is a trough recess running diagonally downward towards the plug opening, constituting a drainage channel in which there is an opening leading to the plug opening through the inner annular flange.

For example, all diameter dimensions for a 113.55 L barrel are the same as for a 132.48 L barrel, with the largest barrel diameter in the area of ​​both barrel body rolling rings located on the completely cylindrical portion of the barrel wall being approximately 474 mm.

For example, all diameter dimensions for a barrel with a capacity of 136.26 liters are the same as for a barrel with a capacity of 198.71 liters or 208.175 liters, with the largest barrel diameter in the area of ​​both barrel body rolling rings located on the completely cylindrical part of the barrel wall or in the area of the clamping ring and the bottom roller is approximately 474 mm.

179 646

Since the inventive lightweight barrel with a volume of 132.48 liters weighs only about 5.2 kg and with a volume of 208.18 liters only about 8.2 kg, the width of the barrel's upper opening is approximately 15% greater than Compared to the known bulbous barrel with a lid as described in the introduction, it is perfectly suited to granular or pasty materials for which a fiber barrel (Fiberdrum) is currently usually used. In the USA, fiber drums (Fiberdrum), possibly with an inner lining suitable for liquid substances, are also often used. Due to its excellent gas and liquid tightness and (with the cover in place) the possibility of almost complete emptying through the spigot hole in the cover, allowing the barrel to be emptied without leaving any residue, the light barrel with a lid according to the invention is also best suited for use with liquid substances instead of the previously used ordinary fiber barrels.

A further advantage of the barrel with a lid according to the invention is that it has substantially the same dimensions as the corresponding plastic barrel with a trunnion and an L-ring or a steel trunnion barrel, so that it can be handled with the same tools for gripping barrels (parrot's beak). Such covered barrels can also be palletized with plug barrels without the usual wastage in such cases due to bulky covered barrels and loss due to height differences. The lidded kegs are filled via the 2-inch plug opening using the same filling devices as for spigot barrels, as the dimensions and location of the spigot opening in the lid exactly match the dimensions of the spigot barrel.

Re-conditioning of covered barrels for reuse or multiple use is much simpler and more effective than plug-in barrels, and the subsequent disposal of these barrels does not pose any problems at all, as the material from which the barrels and their covers are made and With clamping rings, no matter if the clamping ring is made of steel or plastic, it can be completely reused.

The subject of the invention is illustrated in the examples of the drawings, in which fig. 1 shows a barrel according to the invention with a lid with a support ring in a side view, fig. 2 - another embodiment of a barrel with a lid according to the invention, fig. 3 - comparison of the shape of a conventional barrel a bulky barrel with a lid and a cylindrical barrel with a lid according to the invention, fig. 4 - left edge area of ​​the barrel lid according to the invention (American version), cross-section, fig. 5 - left upper edge area of ​​a barrel with a lid according to the invention, in section, Fig. 6 - right upper edge area of ​​a barrel with a lid according to the invention, in section, with added claws of a barrel gripper, Fig. 7 - upper right edge area of ​​a barrel with a lid according to the invention Fig. 8 another barrel with a lid according to the invention (without a support ring), cut-away side view (European version), Fig. 9 - upper area of ​​the barrel with a cover according to Fig. 8, enlarged, Fig. 10 - upper left barrel region in partial section, Fig. 11 - upper left barrel region according to Fig. 10 in section, Fig. 12 - upper right barrel region in section, Fig. 13 - upper left barrel region in another embodiment (American version) ), in section, and Fig. 14 - upper left barrel region in a further embodiment (v^rAmerican version), cross-section.

Fig. 1 shows a barrel 10 according to the invention, in this case with a capacity of 208.18 liters, provided with a cap 12 and a clamping ring 14. About 80% of the barrel 20 is cylindrical and about 10% of the barrel height at the top edge 28 the barrel outlet and at the bottom 34 of the barrel runs with a slight taper. In the completely cylindrical portion 26 of the barrel body 20, two roller rings 38 with a relatively large fillet radius are formed at one third and two thirds of the barrel height. Provided in the conically tapering transition area between the fully cylindrical portion 26 of the barrel body 20 and the flat barrel bottom 34 is a solid, dermal rolling ring 36 that ends flush with the barrel bottom 34. The bottom rolling ring 36 has a trapezoidal cross section at the bottom with a thinner bridge connecting to the barrel body 20 and has almost the same outer diameter as

179 646, the clamping ring 14 is attached in the closed state, thereby imparting to the barrel 10 excellent stability, especially when stacking several barrels, and high strength or resistance to buckling indentation or flat compression (plastic deformation) of the lower edge of the barrel when skewing the filled barrel.

The 208.18 liter barrel has a maximum diameter of approximately 578 mm and a height of approximately 898 mm (height to diameter ratio approximately 1.55). The first embodiment of a barrel of the same diameter but with a slightly smaller capacity of 198.71 liters has a height to diameter ratio of approximately 1.49, the barrel height with the clamping ring applied being approximately 860 mm. This barrel is therefore exactly the same height as conventional barrels available in the United States of America and can therefore be placed on pallets with them. A second alternative embodiment of the barrel with exactly the same diameter dimensions but with a relatively smaller capacity of only 136.26 L has a height-to-diameter ratio of only 1.06, the barrel height with the clamping ring applied being approximately 610 mm. This barrel (called Stubby Drum) looks as high as if it had the same height and width and is intended especially for granulated or dust (powder) products, such as e.g. dyes, while the dyes are taken from the barrel by hand with a barrel trowel. The low height (approximately hand length) of the barrel allows you to pick up debris from the lower barrel area as well without bending your head in the barrel and having to inhale dust particles.

2 shows a preferred embodiment of a slender barrel 10 with a capacity of 132.48 1. The barrel has a height of about 860 mm and a maximum diameter at the rolling rings 38 of about 475 mm. The height-to-diameter ratio of this barrel is approximately 1.82.

A different embodiment of a barrel with identical diameter dimensions but with a smaller capacity of 113.55 liters, on the other hand, has a height-to-diameter ratio of approximately 1.57, the barrel height with the clamping ring applied being approximately 745 mm. Both of these types of barrels with the same diameter (from Figs. 1 and 2), differing only in height, can advantageously be produced in a single adjustable blow mold. For this purpose, it is only necessary to insert the appropriate annular extension element (higher barrel) into this mold or remove this element (lower barrel).

A characteristic feature of these barrel embodiments is therefore that they have almost the same dimensions as common Fiberdrum barrels in the USA and can be handled and manipulated using the same barrel grasping tools as the known Fiberdrum barrels or plug barrels . These new type of lightweight casks with a lid are moreover manufactured in terms of cost more advantageously than comparable Fiberdrum drums and do not have any problems with subsequent disposal as waste, as they are fully recyclable. The clamping ring can be an ordinary sheet steel clamping ring, but it can also be made entirely of plastic.

When using the inventive barrel with a lid for liquids, the barrel lid 12 is provided with at least one spigot hole, preferably two laterally opposed spigot openings, the larger spigot 42 having a 2 inch (approx. 50.8 mm), and the smaller journal 44 has a 3/4 inch (approximately 19.1 mm) bore. From fig. 2 it is also clear that the conical course of the barrel wall inside the recess 22 under the horizontal abutment 18 for the lower leg of the clamping ring 14 into the transition 24 into the fully cylindrical portion 26 of the barrel body 20 takes place at an acute angle α of 15-30 °, preferably 18-20 ° . This shape provides high load resistance when stacked.

In Fig. 3 on the left hand side of the drawing there is shown in dashed lines a known buckled standard barrel with a lid or its body 46 in comparison with the barrel body 20 of the invention. This clearly results in the improved stability of the slender, lidded barrel according to the invention. Moreover, it is seen that in a bulky barrel body the completely cylindrical portion only takes up about one third (1/3) of the entire height of the barrel body, while the fully cylindrical portion 26 in the barrel body of the invention is more than three-fourths (3/4) of the entire height barrel body height.

179 646

This results, in particular also thanks to the stable bottom roller 36, in an advantageous manner that the drums can be stacked on pallets with a simultaneous improved stability and the possibility of rolling the drums at an oblique position.

4 is a sectional view of the left-hand edge area of ​​a barrel cover 12 according to the invention. A lid gasket 30 is inserted or foamed in the downwardly open rim 16 of the U-shaped lid. A groove 32 approximately 25 mm deep is provided at the barrel mouth between the lid rim 16 and the approximately equal height central flat disc 80 of the lid. The gripping groove 32 has a flat bottom 48 extending flat radially inward and having a width of 10 mm, preferably about 15 mm. From the bottom 48 of the groove rises on the inside of an inclined, conical, annular portion 52 which forms a connection element with the upper planar disc 80 of the cover.

On the underside of the barrel cover 12, two annular flanges 54, 56 extending axially and having a width of approximately 20 mm are provided under the gripping groove 32 in the outer edge region. These annular flanges 54,56 are spaced about 20 mm apart and serve to increase the rigidity of the barrel lid 12. In addition, a two inch bore 42 is visible located in the recessed bore shell 50. Of special importance is the U-shaped intermediate or connecting groove 58 between the cover rim 16 and the bottom 48, which extends from the cover rim 16 and is bent inwardly. This bent connecting member 58 or outer axial ring member 54 abuts, when the barrel cover 12 is in place, against the inner wall of the barrel 20 opposite the outer recess 22 and increases the load resistance of the cover or barrel with the cover when stacked by mutual support.

Fig. 5 shows the upper left edge area of ​​a barrel cover 12 according to the invention in partial section, respectively, located on the side beyond the plug or plug-hole cover. Above the bent connecting element 58, radial ribs 60 are formed, engaging internally with the rim 16 of the cover having a U-shape. The radial ribs 60 are arranged in large number with a slight lateral spacing of about 5 to 10 mm.

Moreover, in this embodiment of the barrel cover 12, a second circumferential, upwardly V-shaped groove 62 is provided radially inward behind the gripping groove 32 with a preferably rounded bottom in the outer region of the cover plate 80. This groove 62, through which the recessed cover passes or the bung-hole covers pass, improves the resilience of the cover to the internal overpressure and the liquid impingement pressure occurring when the barrel falls.

Fig. 6 further shows the upper right peripheral area of ​​a barrel with a lid according to the invention with the claws 64, 66 of the barrel gripper applied. In order to design a barrel as a lightweight barrel, it is first and foremost necessary to precisely match the cover and the barrel outlet area. This includes, inter alia, that the radial depth of the recess 22, measured from the extension line of the completely cylindrical part of the barrel body, is 1225 mm, preferably about 17 mm, to securely engage the lower claw 66 of the barrel gripper. The width of the horizontal contact surface for the lower clamping arm of the ring 14 or the contact surface for the claw 66 of the barrel gripper is further enlarged by the fact that the massive edge 28 of the barrel mouth during a blow molding operation is produced by locally upsetting the thermoplastic plastic of the barrel, thereby a small circumferential flange 40 with a radial dimension of about 3-5 mm is formed under the edge 28 of the barrel.

Fig. 6 further shows that the upwardly projecting area of ​​the massive edge 28 of the barrel mouth, the height of which is about 8 mm, has a cross-section at the top ending with a smooth sector-shaped edge in order to form a sealing surface for the cover gasket 30. Due to the special design of the shaping slide in the blow mold, it is ensured that the upwardly facing lid seal 30, located directly opposite the lid seal 30, is free from folds and welds for welding the swollen material.

179 646 artificial. Such folds and welds are displaced outwardly and are preferably located in the outer flange 40 where they are not a defect. In order to improve the gripping area of ​​the upper claw 64 of the barrel gripper, a plurality of radial ribs 60 may be provided above the bent connecting member 58 behind the U-shaped edge 16 of the cover.

In order to highlight the essential features of the invention, Fig. 7 shows again the right upper part of the barrel with a lid in detail

At the top, at the edge of the cover, an abutment surface 84 (indicated by an arrow) is formed with a width of about 6-12 mm, preferably 8 mm, slightly oblique to the upper clamping arm of the ring 14. This prevents the edge of the cover from slipping in the folded areas, e.g. in the event of the barrel falling, out under the retaining ring and relieve the lid gasket.

Due to the flange edge 40 projecting outwards at the outer edge of the barrel body outlet, a contact surface 18 is created with a width increased by at least 10 mm for the lower, slightly oblique clamping arm of the ring 14. The contact surface is preferably even 15 mm wide (radially) (arrow 86). This is also advantageous from the point of view of firmly gripping the barrel with the lower claw of the grasping tool (parrot's beak). The bottom 48 of the outer circumferential gripping groove 32 is at the same height or even slightly below the lower clamp leg of the ring 14. This allows the upper claw of the barrel gripper to extend deep down into the gripper groove 32 and securely hold the barrel with the lid in place.

The edge of the barrel body extending into the clamping ring 14 is substantially inverted T-shaped with a horizontally disposed web 88 and a substantially centered upwardly projecting vertical web 90, the upwardly facing surface of the vertical web 90 being rounded in cross section thereof. of the edge is a segment of a circle (radius 4.5 mm) and forms the sealing surface of the rim of the barrel body contacting the lid gasket. The upwardly facing portion of the horizontal web 88 is a flange-like projection 40 extending radially outward. An inwardly facing portion of the horizontal web joins the downwardly extending wall of the barrel body. In the transition region from the portion of the web facing inward to the wall of the barrel extending downward, there is a cut-off or cut-off surface marked by an arrow 92 (92) for the removed rim (blow-mold waste). This cut-off surface may extend vertically or as shown slightly oblique downwards and inwards. Directly below the cut-off surface is the contact area 92 of the inner barrel wall with the outer surface of the barrel cover or an extension of the outer annular flange of the cover 54. In this contact area 92, the barrel body outlet has the smallest diameter, which at this point is approximately 2-4 mm smaller. than at the riser cut-off surface. As the cover is inserted, the annular collar 54 of the cover slides inside the barrel and the contact area 92 radially centers and supports the cover on the inner barrel wall below the rim cut surface. For some slightly oval-extended barrel bodies, e.g. due to the shrinkage stress, a centering alignment takes place at this point in the area of ​​the barrel outlet, whereby a uniform positioning is ensured and a tight seating of the upwardly facing sealing surface of the vertical bridge 90 relative to the cover gasket 30 is ensured. This type of centering was not possible with known barrel covers, which did not extend partially inside the barrel and did not touch the barrel inner wall there. Thanks to this centering, it is even possible to position the vertical rib 90 (width 8 mm, height approx. 9 mm) so precisely in the interior (approx. 10 mm) of the U-shaped, downwardly open rim that exactly on the outside and on the inside of the vertical rib 90 remain exactly fixed lateral spacing gaps 96, 98 with a width of 1 mm (marked with an arrow). In this way it is ensured that the vertical bridge 90 with the smooth arched sealing surface always hits the center of the sealing ring 30.

179 646

The barrel with the lid according to the invention is further characterized in that the largest outer diameter of the barrel cover 12 is equal to the outer diameter radially to the outside of the projecting flange-like projection 40 (both parts end flush with each other), the outer face gap being equal to the downwardly facing flange of the open down U-shaped lid rim from the upward side surface of the radially outwardly projecting flange protrusion 40 at the mouth edge of the barrel with the lid in place and closed clamp ring is only about 1 mm. Thereby it is ensured that when the stack is loaded, the lid gasket 30 only needs to be pressed by this one millimeter, whereupon the outer shoulder of the lid rim contacts and bears against the outwardly projecting flange lip 40, thereby avoiding excessive stress on the gasket. thirty.

Another inventive barrel with a cover (European version) without a support ring - a capacity of 220 liters is shown in FIG. 8, with the cover 12 in place and the clamping ring 14 the weight of the barrel is only about 8 kg. The plastic of the barrel's body is made of high-molecular polyethylene (HD-PE). The disc-shaped upper member of the barrel cover 12 projects in this embodiment above the downwardly open and U-shaped rim 16 of the cover or surrounding the upper arm of the clamp ring 14. The height of this projection formed by the cover is approximately two to five wall thicknesses or the thickness of the barrel cover. , preferably about 10 mm. The purpose of this is to improve the properties necessary for long-term storage in stacks with a specific increase in internal pressure. In another embodiment, the barrel with a lid may be provided at the bottom with a support ring or a bottom roller which then joins or is flush with the bottom plane.

Fig. 9 shows a better view of the barrel cover 12 with two lateral pivot holes 42, 44 recessed into troughs 50, 50 '. The left 2-inch plug 42 plugs the filling and keg opening with an inserted suction tube. Moreover, this plug opening 42 is, thanks to the adjacent bevel of the upper part of the cover, designed as an opening allowing the barrel to be emptied without leaving any residue. A smaller 3/4 inch bore 44 may be opened to vent the barrel while it is being filled or its contents removed.

Another very important feature is that under the V-shaped gripping groove 32 on the inside of the barrel cover 12 two spaced circumferential annular webs 54, 56 are provided. An outer annular web 54 abuts the inner barrel wall. These annular webs 54, 56 face the barrel center and are spaced about 10-30 mm, preferably about 20 mm, and have a length of about 20 mm measured in the axial direction. A special feature of this embodiment of the barrel with a lid is that the barrel has almost the same dimensions as the corresponding closed barrel with an L-ring that is now widespread and used in the chemical industry in Europe, so that this new barrel with a lid can be stacked on pallets with known plug barrels, and can be loaded and handled using the same barrel gripping tools as for conventional plug barrels. These new barrels with a lid having a lightweight design are moreover produced more cheaply and do not have any later problems with disposal as refuse, since they are completely recyclable. Here too, the clamping ring 14 can be a conventional steel sheet clamping ring, but it can also be made entirely of plastic.

In Fig. 10, the barrel cover 12 is shown in cross section next to the 2-inch plug hole 42. On both sides, next to the plug hole cover 50, the top surface of the barrel cover 12 slopes downwards towards the edge. The bevel 68 extends outward as far as a shoulder or to the beginning of an inner annular web 56, or to an inner flat edge of the gripping groove 32.

As a result, the last residual liquid flows to the lowest point when the barrel is placed slightly inclined with the lid in an upside down position.

179 646 at the top edge of the inner ring web 56 or at the outer edge of the 2 inch bore, or exits the barrel interior through the bore.

In order to also allow residual liquid to drain out of the outer cover part or the intermediate space between the two annular webs 54 and 56, it is provided according to the invention that at least in the inner annular web 56 immediately in front of the drain plug opening 42 there is an opening 76 (or a wider transverse opening). ). Preferably also in the outer annular web 54 at the same place a suitable opening is provided to allow residual liquid to flow out of the gap between the inner wall of the barrel and the outer annular web 54. Preferably, a trough recess 74 is provided just in front of the plug opening 42, seen from the inside. which opens an opening 76 in the annular bridge 56 leading to the bore. In the gripping groove 32, this internal drainage tray can be seen as a ridge ridge 72 extending obliquely upwards into the pin hole.

As can be seen from Fig. 11, the holes 76 extend diagonally across the annular webs 54 and 56 into the journal hole, namely with a steeper slope into the journal hole than that of the chamfer 68, so that the lowest point 78 is at the outer edge of the plug hole. plug. This can be realized without any problems in that the flat bottom 48 of the chuck groove 32 lies deeper than the bottom of the cover 50 of the pin hole. The bottom 48 of the groove lies at least one to two wall thicknesses (about 3-10 mm) of the barrel cover lower than the bottom of the plug-hole cover.

Fig. 12 further shows in section the right peripheral part of a barrel with a lid according to the invention. As can also be seen from the other drawing figures, a lid gasket 30 is inserted into the downwardly open U-shaped rim 16 of the lid. A gripping groove 32 about 20-40 mm deep is formed between the lid rim 16 and the raised center flat disc of the lid. The gripping groove 32 has a flat bottom 48 extending flat radially inward and having a width of about 15 mm. From this bottom 48 of the groove rises (except in the area of ​​the spigot cover) a sloping conical annular portion 52 as a connecting element to the upper flat disc of the cover.

On the underside of the barrel cover 12, in the outer area, two annular flanges 54, 56 are recessed into the barrel body, with a width measured axially of approximately 20 mm. In addition, a 44 3/4 inch bog hole is visible in the recessed shell 50 '. In principle, you can also have a slant in the lid here, which allows emptying completely.

Fig. 13 shows a further embodiment of the barrel with a lid according to the invention (American version). The outlet bore 42 'is of a design commonly used in the USA with a plug 70 sealed at the top on the plug-hole port, unlike the plug-bore design commonly used in Europe. which, in the stub of the journal hole, adheres to the conical sealing surface with its sealing ring under the thread, thus ensuring sealing.

The last embodiment shown in Fig. 14 differs substantially from the embodiment shown in Fig. 13 in that the top or center flat disc 80 of the barrel cover is made flush with the edge of the cover or flush with the upper leg of the clamp ring. The chamfer 68 of the flattened area of ​​the cover thus extends to the side at the outlet opening correspondingly flatter.

In the case of lightweight barrels according to the invention, it is necessary to precisely adapt the barrel cover in particular to the barrel outlet area. The special design of the top edge 28 of the barrel is of particular importance. To securely seat the lower claw 66 of the barrel gripper, the radial depth of the recess 22, measured from the extension line of the fully cylindrical part of the barrel body, is 12-25 mm, preferably about 17 mm. The width of the slightly oblique contact surface for the lower arm of the clamping ring 14 or the contact surface for the claw 66 of the barrel gripper is further increased in that the solid, solid edge 28 of the barrel outlet is produced in the mold during the blowing process by upsetting the thermoplastically deformable plastic of the barrel wall using the shaping slider w

179 As a result, on the outside, under the edge 28 of the barrel, a small circumferential collar 40 is formed with a radial dimension of about 5 mm.

The edge 28 of the barrel outlet is formed in an inverted L shape which forms an angle of 70-85 °, preferably around 76 ° between its downward long arm (= barrel wall) and its substantially horizontally outwardly directed short arm. The outwardly pointing short arm is designed slightly conical on its underside, that is to say it tapers outwards. This oblique surface serves as an abutment surface for the lower leg of the clamping ring which, through the oblique contact surface, presses the cover with the seal in the barrel closed state against the top edge of the barrel. For this purpose, the short leg portion of the L is provided on its upper side with a bead-shaped projection which has a smooth semicircular sealing surface at its top. This bead protrusion fits into the U-shaped rim of the lid and seals with the lid gasket. The U-shaped outer edge of the lid facing downwards terminates almost flush with the radial outward flange 40 of the edge 28 of the barrel outlet, so that even if the stack load is exceeded the lid gasket is not overloaded.

The upwardly semicircular region of the massive edge 28 of the barrel mouth is at least 10 mm high and forms the sealing surface for the lid gasket 30. Due to the special design of the shaping slide in the blow mold, it is ensured that the upwardly facing sealing surface of the swollen massive edge 28 of the barrel outlet is free of folds and welds of the swollen plastic.

In order to achieve the advantageous properties of the barrel with the lid according to the invention, a number of mutually adapted details and details are important, which together constitute the essence of the barrel with the lid.

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<img file="PL179646B1_D0001.tif" />

3L

FIG. 2

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<img file="PL179646B1_D0002.tif" />

FIG. 3

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<img file="PL179646B1_D0003.tif" />

FIG.5

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<img file="PL179646B1_D0004.tif" />

FIG. 6

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<img file="PL179646B1_D0005.tif" />

FIG. 7

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<img file="PL179646B1_D0006.tif" />

FIG. 8

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<img file="PL179646B1_D0007.tif" />

FIG. 9

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<img file="PL179646B1_D0008.tif" />

<img file="PL179646B1_D0009.tif" />

FIG.12

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<img file="PL179646B1_D0010.tif" />

FJG.13

<img file="PL179646B1_D0011.tif" />

FIG.14

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<img file="PL179646B1_D0012.tif" />

Publishing Department of the UP RP. Circulation of 70 copies

Price PLN 4.00.