Abstract: A method for producing a bung for a metal cask that does not require a conventional collar and seal, and that simplifies the operations for forming the bung. The method disclosed in the present application includes the following steps. First, a prestamping operation creates a preforming dome in the wall of the cask such that a cuvett is formed. Second, an approximately cylindrical shaft is formed by stamping and thus puncturing the wall of the cask at the location of the bung. Third, the protruding edge of the shaft is folded down the to form an external rolled edge. Fourth, encircling the shaft with a rigid ring constituted by at least two annular sections such that the metal does not tear during the formation of the threads. Finally, the method of the present invention includes the step of implementing a roller threading head to form internal threads in the shaft.

Abstract: The invention concerns a press for blow-molding. This press (10) comprises a frame (11) on which there are mounted two movable plates (12, 13), each supported a half-mold (14, 15) and actuated by a mechanism for opening and closing the mold, which is formed of the two half-molds. Each of the movable plates is attached to a beam mounted on two axles (19, 20) so that it slides along these axles in opposite directions. The opening mechanism essentially consists of an actuator, two transmission blocks (29) and two pairs of connecting rods (33) connected to said movable plates. When the actuator drives the transmission blocks (29) in the direction of arrow A, the rods cause the mold to close. When the transmission block turns in the direction of arrow B, displacement of the rods causes the mold to open. The invention has applications for high speed molding presses in which the mold must be opened in rapid cycles.

Abstract: Process and device for conveying objects on transport pallets along a circuit by altering the spacing (e, E) between the objects in order to pass through at least one work station (2, 3). The spacing is altered by longitudinally separating the pallets (4) in order to pass from a first interval, which can be non-existent, to a second interval (X) which can be adjusted. For this purpose, a station (7) is provided which laterally transfers groups of pallets (29, 39, 31, 32) between two sections of parallel tracks (5, 6). The groups are transversally separated stepwise by a ram (17), the pallets of a group (30) are then separated by engaging elements (22, 23) and driven together by a comb mechanism (26). Application in manufacturing, assembly or processing plants using pallet conveying mechanism, especially for the manufacture of containers blow-moulded from preforms.

Abstract: A container made of a synthetic material, e.g., a bottle (10), comprising a closed bottom wall (11) and an opening (12) in the upper portion opposite the bottom wall. The container is produced according to a blow moulding, stretch blow moulding or thermoforming method, and its wall (9) comprises at least one fold line (13) consisting of a narrow linear area (13a) of said wall, in which the synthetic material has a different physical structure, whereby it is less plastically deformable but has at least as much tensile strength as the rest of the wall (9). This structural modification is obtained by mechanical or thermal processing or by exposure of the area in question to suitable particle radiation. The resulting bottle is readily foldable with a view to disposal after use.

Abstract: An improved sealing arrangement is provided for a gravity transfer installation of the type in which product is transferred from a container having a sealable opening in its base, downwardly through a chute, and into a receptacle. The arrangement comprises a first plate mounted on guides attached to the chute and for sliding between a position where it covers an upper opening of the chute and a position where it uncovers this opening, and further includes a second plate mounted on guides attached to the container for sliding relative to the latter between a position where it covers a lower opening of the container and a position where it uncovers that opening. The arrangement is constructed such that, in the course of displacement of the container, the movements of the two sliding plates relative to their respective guides are synchronous but in opposite directions.

Abstract: A method of seaming a preformed end closure to a preformed container body of a drum or the like for forming a seam of reduced radial projection relative to the sidewall of the container body. At the start of seaming the end closure is in driving engagement with a rotating chuck and flanges of the end closure and container body are in overlying relation. The skirt of the end closure is radially spaced from the sidewall of the chuck and driving engagement therebetween is effected in the annular curved connecting zone between the skirt and recessed transverse central portion of the end closure. The skirt flares from the central portion to the flange thereof and is preferably at least in part frustoconical or has an annular step. The sidewall of the container body is centered on the skirt of the end closure and is spaced a radial distance from the chuck sidewall substantially greater than the thickness of the sheet metal of the end closure of the skirt.

Abstract: The present invention relates to a process of fabrication of drum bodies having rolling hoops, and the drum bodies so produced. The drum body is provided with a plurality of corrugations generally offset towards the center of the drum with the peaks of the corrugations in line with the undeformed part of the drum. At least one of the peaks of the corrugations is then expanded radially outwardly to make a rolling hoop.

Abstract: A method of seaming a preformed end closure to a preformed container body of a drum or the like for forming a seam of reduced radial projection relative to the sidewall of the container body. At the start of seaming the end closure is in driving engagement with a rotating chuck and flanges of the end closure and container body are in overlying relation. The skirt of the end closure is radially spaced from the sidewall of the chuck and driving engagement therebetween is effected in the annular curved connecting zone between the skirt and recessed transverse central portion of the end closure. The skirt flares from the central portion to the flange thereof and is preferably at least in part frustoconical or has an annular step. The sidewall of the container body is centered on the skirt of the end closure and is spaced a radial distance from the chuck sidewall substantially greater than the thickness of the sheet metal of the end closure of the skirt.

Abstract: A triple seam for assemblying a bottom to a container body, and a process for forming the triple seam. The process comprises the step of forming an axially extending seaming structure comprising a plurality of layers belonging to adjoining edges of the body and bottom. One of the adjoining edges includes a first layer and a contiguous overfolded second layer having an axial length less than the axial length of said first layer to increase the number of layers in a first axial section of the seaming structure. The process also includes the step of lamination rolling the seaming structure to a uniform width. A hook-shaped profile is formed in said body edge as a preliminary step in this process.

Abstract: An improved seaming chuck in an apparatus for attaching a cup shaped end member to the body member of a container by a seaming process. The chuck has a recess about its peripheral edge surface for accommodating excess material during the seaming process. The recess also has a varying depth for varying the dimension of the portion of the seam within the recess and preventing relative rotation of the seaming chuck with respect to the container end member during the seaming process.

Abstract: A method and apparatus for triple roll seaming flanged end closure to a flanged container body. Before the flanges of the end closure and container body are rolled together by a suitably shaped seaming roll, the peripheral portion of the end closure flange is imparted with a frustoconical portion at an angle between about 20.degree. and 50.degree. with respect to the yet undeformed part of the end closure flange followed by a first rolled section which curves substantially around, parallel to the frustoconical zone. The raising of the frustoconical portion and the forming of the first rolled section may be effected substantially simultaneously, either before or after the end closure is positioned in the open end of the container body, in a first tool setup including a single forming roll with parallel entry and exit zone joined through a frustoconical zone connected to a radiused zone.

Abstract: A process for securing bases in the ends of metallic container bodies by .[.upsetting.]. .Iadd.rolling by a seaming roll .Iaddend.contiguous peripheral portions of the bases and container ends, in which overlapping bent-over peripheral base and container end portions are .[.knurled to roll them over.]. .Iadd.rolled together by a seaming roll .Iaddend.to produce a joint having seven superposed thicknesses of the base and the container body. .[.At the end of.]. .Iadd.During .Iaddend.the roll-over movement, a .[.polymerized.]. .Iadd.polymerizable .Iaddend.liquid is injected between at least some of the thicknesses of the metal of the base and container body.