Abstract: A hem is formed in two abutting surfaces of a work piece in a two-pass process in which the work piece is pre-hemmed by a reciprocating tool in a first pass and in which the hem is then formed from the pre-hem by the same reciprocating tool in a second pass upon inversion of the work piece. In especially preferred aspects, the reciprocating tool has an angled contact surface that cooperates with a corresponding static tool.

Abstract: A method and tool for calibrating an extruded tube for use in a manufacturing operation. According to the method, the tube is stretched while in a clamping tool by approximately 3%. The tool encloses the tube while a stretching mechanism is clamped to opposite longitudinal ends of the tube and applies a stretching force to opposite ends of the tube. The tool includes a clamping mechanism that clamps the tube into a cavity and a stretching mechanism with clamps that are attached to opposite longitudinal ends of the tube to calibrate the tube by longitudinally stretching the tube.

Abstract: A tool kit including a clamping structure formed of dual clamping bodies that define a cylindrical projecting member when the clamping bodies are united, a force transfer adapter, a substantially cylindrical force applying member having a tapered end and an elongated yoke having a longitudinal bore defined therein, wherein the first end of the yoke and the cylindrical projecting member have cooperating features for facilitating a non-permanent engagement with one another when the dual clamping bodies are united, and wherein the second end of the yoke and the force applying member include cooperating features for facilitating the gradual application of force to the force transfer adapter.

Abstract: A panel bender (10) designed for making bends on sheet metal sheets (13) comprises a substantially C-shaped main structure (11) equipped with a fixed element (12) and a mobile element (14) designed to support and clamp in a preset position a sheet metal sheet (13) to be bent, and also comprises a substantially C-shaped blade holder structure (16) connected to the main structure (11) and mobile in space inside this by means of a series of vertical guides (15) at right angles to the plane of the sheet metal sheet (13) to be bent. The blade holder structure is equipped with an upper blade (26) and a lower blade (27) designed to enter into contact with the surface of the sheet metal sheet (13) to be bent clamped between the mobile and fixed elements (12, 14) of the main structure (11) and to deform the sheet metal sheet by means of a movement with a programmable trajectory.

Abstract: A holding device for a flanging tool includes two clamping parts movable towards one another to respective clamping positions. A stop is configured to abut, in an abutment position, an end of a pipe to be flanged. An actuating mechanism is configured to move the clamping parts into the respective clamping positions so as to clamp the pipe to be flanged. The actuating mechanism is coupled to the stop such that actuation of the actuating mechanism moves the stop out of the abutment position.

Abstract: A device for bending sheet material comprises a receiving plate and a forming plate defining or connectable to one another so as to define therebetween a receiving slot of fixed dimensions. A bending plate is pivotally connected to the receiving plate. The bending plate has an upper surface substantially in a common plane with an upper surface of the receiving plate. The forming plate comprises a first side surface extending along an open end of the receiving slot and forming a first acute angle with a first major surface of the forming plate. The bending plate has a range of pivotal motion of greater than 90°.

Abstract: A stamped workpiece for use as a motor-vehicle part is made by first forming from sheet metal an intermediate workpiece extending along an axis and forming in axially opposite ends of the workpiece respective outwardly directed V-shaped formations. The workpiece is then set directly or indirectly via blank holders on one die of a stamping apparatus and one of the formations is engaged with a complementarily shaped element of the one die. Then another element complementary to the other of the formations is engaged against the other formation and the workpiece is axially gripped between the elements. Finally, another die of the apparatus is pressed against the workpiece on the one die to stamp the workpiece into a finished shape.

Abstract: In an initial state of roller hemming processing, an erected flange 65 begins to be bent by a roller 48. At this time, a first plate 63 and a receiving face 15 are brought into tightly contact with each other at a contact point 70 between the roller 48 and the erected flange 65 by strongly pinching by the roller 48 and an auxiliary roller 51. On the other hand, in portions other than the contact point 70, the receiving face 15 tends to be separated from the first plate 63 by reaction. Since slider blocks 22 and 22 are movable along rails 21 and 21 on a side of the receiving die 10, the receiving die 10 rotates clockwise in the drawing about the contact point 70. A tight contact in the contact point 70 is guaranteed as the receiving die 10 rotates about the contact point 70. As a result, the hemming processing with a good shape can be achieved without wrinkling, ruffling, or deformation.

Abstract: In a method of making a sheet metal part for motor vehicles, a blank is placed with its opposite length sides between outer lower forming jaws of a die. The blank is then clamped by moving the outer lower forming jaws toward one another. Outer upper forming jaws are then moved to their closed position so that the length sides of the blank are secured in place between the lower and upper forming jaws. The lower and upper forming jaws and a press tool are then moved toward one another, and the blank is shaped to its final configuration to produce a sheet metal part.

Abstract: Method and apparatus hems the edges of inner and outer panels by bending a peripheral flange of the outer panel over edge portions of the inner panel to form a panel assembly. A press apparatus has a lower platen and an upper platen. The outer panel is placed onto the lower platen and the inner panel is placed onto the lower panel with the peripheral flange of the outer panel surrounding the inner panel. The upper platen is lowered to capture the inner panel atop the outer panel. A first portion of the peripheral flange is hemmed by closing hemming dies over the first portion of the peripheral flange to bend the flange onto the inner panel. A second portion of the peripheral flange is hemmed by passing a hemming roller mechanism along the second portion of the peripheral flange to bend the flange onto the inner panel.

Abstract: A method and tool for forming a hem flange. A larger radius bend is initially formed when a pre-hem flange is formed. A sharper radius bend is subsequently formed when the flange is formed. After the flange is formed, conventional hem forming methods and tools may be used to complete formation of a hem that may be used to join inner and outer panels.

Abstract: The present invention provides a bending die in which the fixed die 1 and the rotary die 2 are surface contacted to each other, the rotary die 2 is rotated rearward after press forming to cause the workpiece 3 to be moved away from the die, wherein the contact surface 9 between the fixed die 1 and the rotary die 2 is formed in a flat surface. In addition, the present invention is set such that the rotary center point P of the rotary die 2 is set outside the line 10 drawn from one end C1 of the linear line indicating the contact surface 9 of the rotary die 2 in a direction of right angle in respect to the linear line when the contact surface 9 is seen in a section of a direction perpendicular to the axis of the rotary die 2. With such an arrangement as above, a machining of the contact surface 9 can be facilitated more and under a lower cost than those as compared with those forming the arcuate surface as found in the prior art.

Abstract: A machine for hemming a sheet metal assembly is disclosed in which the sheet metal assembly includes an inner sheet metal panel and an outer sheet metal panel. The outer panel also has an outer lip which lies in a plane transverse with respect to the plane of the inner panel from a bend line in the outer panel. The inner panel also has an outer edge spaced inwardly a few millimeters from the bend line of the outer panel. The apparatus includes a base and a nest adapted to receive and support the sheet metal assembly, and this nest is movably mounted relative to the base. A final hem tool mounted to the base performs a final hem operation. This final hem tool has a generally planar section overlying the outer edge of the inner panel and a portion of the lip following a prehem operation. The final hemming tool also includes a second curvilinear section adjacent the first planar section and this second curvilinear section overlies the remainder of the lip and extends to the bend line.

Abstract: A modular system for seaming and a headstock to perform it, that has a structure, a table (2) and a cradle (1) on which the parts to be machined are supported. It includes a slide that moves in a linear manner (6) and that includes the tools, which are mounted on a tool holder that turns on a shaft on the body of the moving slide, and towards the parts to be seamed. It permits the seaming of both internal and external contours.

Abstract: A flange bending apparatus for bending an upstanding flange on an inside perimeter of an automotive window opening. A flanging steel drive reciprocally drives a flanging steel between retracted and extended positions on a frame. The retracted position of the first flanging steel allows a metal panel workpiece to be positioned on the frame with the flanging steel extending through an opening in the workpiece. When in the extended position the flanging steel overlies a portion of an inside perimeter of the opening. As it moves toward the extended position the flanging steel engages an inner surface of an upstanding workpiece flange that extends upward from around the inside perimeter of the workpiece opening. The flanging steel then bends the flange radially outward as the drive continues to move the steel to the extended position. The flanging steel bends the workpiece flange radially outward such that a lateral bend line is formed along the flange where no breakline was present before bending.

Abstract: Bending machine for sheet metal panels with high edges, comprising a counter blade fixedly mounted to a stationary base, a mobile blank holder placed above the counter blade, a turnable support for blank holder that is hinged to said stationary base, first moving means connected with the turnable support in order to control its rotation with respect to the stationary base, the blank holder being connected with the turnable support in such a way so as to be able to slide upward and downward with respect to it and second moving means are provided that are suitable to control the sliding of the same blank holder with respect to the turnable support.

Abstract: A modular system for seaming and a headstock to perform it, that has a structure, a table (2) and a cradle (1) on which the parts to be machined are supported. It includes a slide that moves in a linear manner (6) and that includes the tools, which are mounted on a tool holder that turns on a shaft on the body of the moving slide, and towards the parts to be seamed. It permits the seaming of both internal and external contours.

Abstract: A hemming steel constructed to fold or hem a flange of an outer sheet metal panel onto an inner sheet metal panel has a forming face with a first, generally flat section and a second section inclined to the first section to provide a finished, hemmed flange having an outer portion closed or folded flat onto the inner sheet metal panel and an inner portion adjacent to the fold line which is inclined to the outer portion providing a reduced radius of the fold line bend. The second section of the hemming steel is preferably generally planar such that the inner portion of the hemmed flange is generally flat and provides an outer bend diameter along the fold line of the outer sheet metal panel which is less than three times the thickness of the sheet metal panel and may be approximately equal to or less than the thickness of the outer panel.

Abstract: Guide means interposed between a blade-holder (20) and the frame (12) of a bending press comprise a slide (40) slidable along an axis (Z) perpendicular to the plane of the metal sheet (P) to be bent. The blade-holder (20) is coupled to the slide (40) so as to be slidable along an axis inclined to a plane perpendicular to the plane of the sheet (P). First means (38) for bringing about movements of the blade-holder (20) along the axis perpendicular to the plane of the sheet (P) are interposed between the frame (12) and the blade-holder (20). Second means for bringing about movements of the slide (40) along the inclined axis are interposed between the slide (40) and the blade-holder (20) in order to produce movements of the blade-holder (20) towards and away from the blank-holder (16, 18), parallel to the plane of the sheet (P). These movements can be brought about in preselected combinations, preferably under the control of a numerical-control device.

Abstract: There is described a machine for machining metal sheets, which comprises a bending machine for bending sides of a metal sheet and a manipulator-rotator that is mobile in relation to the bending machine for automatic positioning of the metal sheet during bending. The machine comprises at least one punching press for punching said metal sheet, that is served by said manipulator-rotator so that said manipulator-rotator is utilised for automatic positioning of the metal sheet both during bending and during punching of the metal sheet.

Abstract: An apparatus for shaping panel-shaped workpieces uses an hourglass-shaped roller as bending tool. The workpieces are clamped between a first and a second tool. The second tool has a holding-down surface. Superimposed vertical side surfaces of the tools are offset by a horizontal dimension X, which corresponds at most to five times the thickness of the panel-shaped workpiece. The second tool is inclined and forms a further vertical surface in a region in which the panel-shaped workpiece is shaped into a comer and in which the tool does not cover the workpiece.

Abstract: An apparatus (1) serves to bend a hollow section (2) with which a spacer frame for insulating glass sheets is to be manufactured. For this purpose, the hollow section (2) can already be filled with drying agent during bending or, however, still be empty. The bending apparatus also has, in addition to a bending tool (11) and an abutment (13), a hold-down clamp (17) for impinging upon a side band (6) and/or a flange (10) whose cross section continues internally, and parallel thereto a support (16), so that the external proportions of the hollow section (2) remain precisely preserved even in the bending area (4). In order to support thereby the bending motion and the deformation, as well as the flow of the material of the hollow section (2) and its side bands (6)/flanges (10), the hold-down clamp (17) is subdivided and has an element (171) co-rotatable with the bending motion in the bending direction, which supports the change of direction of the side band (6)/flange (10) during the bending operation.

Abstract: A bending machine for the production of metal sheet panels having bent edges comprises a blank holder having programmable length provided with blank holder composition segments each formed by a main slidable segment and by an auxiliary segment movably supported by the main segment and operatively connected to actuators capable of displacing it from a work position wherein an active edge thereof is aligned with continuity with an active edge of the main segment to an at rest position wherein it is capable of penetrating inside a cavity obtained in one side of a segment that is adjacent to it on the opposite side of the main coupled segment.

Abstract: A hand tool is disclosed for producing trigs from flat metal strips. The hand tool has a pair of opposite press blocks or "jaws." One jaw serves as a base. It has a loop affixed in it for receiving an insertion portion of the strip. It also has appropriate guides and stops for promoting proper location of the insertion portion and preventing its untimely dislocation. The other jaw has a corner edge which when the jaws are closed on the single ply of the insertion portion, forms the outer limit of the insertion portion and allows for initiating bending of the remaining portion of the strip back upon the insertion portion.

Abstract: A device for bending hollow-section strips (12) with clamping and guiding jaws (20, 21). A bending support (1) is provided, which consists of two bending support parts (2, 3) that engage between clamping and guiding jaws (20, 21). Bending support parts (2, 3) are independent of the clamping and guiding jaws (20, 21), which can be adjusted in the bending plane relative to the clamping and guiding jaws (20, 21). One bending support part (2) is mounted on a support (4) and the other bending support part (3) can be shifted, relative to the bending support part (2) that is mounted on the support (4), in a direction (arrow 5) that is perpendicular to the bending plane, whereby a movable bending support part (3) is under the action of a spring (9), which urges it away from the bending support part that is mounted on the support (4). Thus, the bending support (1) is automatically adjusted to an effective width that corresponds to the width of the hollow-section strip (12).

Abstract: The press comprises two tool holders facing each other (28a, 28b), capable of relative movement one towards the other and back again. Each tool holder carries a bending tool (40a, 40b) and a clamping tool (42a, 42b). The tool holders (28a, 28b) are in addition capable of relative movement between two working positions in one of which the rear edge (46a) of a tool holder (28a) is so positioned as to cooperate, in order to bend the sheet (L) in a first direction, with a front edge (44b) of the bending tool (40b) of the other tool holder (28b), and the clamping tool (42b) of the other tool holder (28b) is immediately opposite the tool of the first tool holder (28a) in order to cooperate with it through the interposed sheet (L). In the other working position, the functions of the edges of the bending tools and the functions of the clamping tools are reversed in order to carry out the bend in the other direction.

Abstract: A device for cambering conductive fingers, including a cambering plate (14) having a mold (16) which corresponds to the camber to be produced, a device for positioning (8) the intermediate substrate relative to the cambering plate (14), a cambering tool (22) disposed opposite the mold (16) for acting on a conductive finger (4), and a control device (24, 7) for ensuring or controlling the relative displacement of the cambering plate and the cambering tool in a first direction perpendicular to the plane containing the conductive fingers (4) and in a second direction parallel to the longitudinal direction of the conductive fingers (4).

Abstract: This invention relates to a tool position controller of a bending machine which can control a bending angle at an arbitrary portion during a bending work. The upper part of this controller is divided into two plates (5a,5a) by groove in a longitudinal direction. The controller includes a die (5) which has a reversed plate support (9) fitted inside a groove (5b) defined between these two plates, die push-up means (10, 11, 12) disposed at at least one position in the longitudinal direction of the die below the die, and feed quantity control means (13, 14, 15) for controlling the feed quantity of the die push-up means on the basis of a machining condition that has been in advance inputted. A work (40) is held under pressure between a punch (8) fitted to the tip of a ram (7) moved vertically by a pressure holding cylinder (6) and the reversed plate support (9) described above and is subjected to the bending work when the die is pushed up through the push-up means.

Abstract: The bending unit includes a fixed counterblade, a metal sheet holder which, pressing on counterblade, holds one of the edges of metal sheet and a blade arranged on the same side of the metal sheet holder as the metal sheet. This blade, translating with respect to the counterblade and to the metal sheet holder, causes the displacement outside the plane of the edge of the metal sheet which is not held by counterblade and metal sheet holder. The counterblade and blade are made in a plurality of segments parallel and side by side to one another in a direction orthogonal to the plane of the metal sheet, and the metal sheet holder is so flexible as to follow the counterblade in its deflections.

Abstract: A device for bending a workpiece having a substantially planar leg fixed to a substantially planar cap at an initial angle comprises a block bar having a rounded bending surface for contacting the leg of a workpiece and a punch for urging the leg of the workpiece against the rounded bending surface to vary the angle between the cap and the leg from the initial angle to a desired angle while simultaneously maintaining the substantially planar shape of the cap and the leg. A method for bending a workpiece having a substantially planar leg fixed to a substantially planar cap at an initial angle comprises positioning the workpiece adjacent a block having a rounded bending surface and urging the leg of the workpiece against the bending surface.

Abstract: In a method for the bending of workpieces by swivel bending jaws, the bent-off part is to assume a predetermined bending angle with respect to the workpiece, for this purpose, in a first bending operation, at least one corresponding leg is to be bent off from the workpiece by means of the swivel bending jaws. Then, the swivel bending jaws are released from the leg and a springback of the leg or the actual bending angle is determined by direct measurements and compared with a set bending angle. Subsequently, an agreement is established between set bending angle and actual bending angle by a renewed bending operation, by a bending-over.

Abstract: A hemming apparatus for hemming the peripheral part of a work usable for a motorcar in the form of a door, a bonnet or the like includes a lower anvil on which the work is placed, an upper anvil adapted to support the peripheral part of the work from the above, a presser for supporting the peripheral part of the work from the lower side, a link arm of which one end is operatively connected to the lower end of a second hydraulic cylinder, a shaft of the link arm being turnably supported at a middle part thereof by a frame, a preliminary bending punch for primarily preliminarily bending the peripheral part of the work and a main bending punch for secondarily bending the peripheral part of the work. The lower end of the preliminary bending punch is operatively jointed to the link arm via a joint member at one end of the ink arm, while the lower end of the main bending punch is operatively jointed to the link arm via a joint member at an opposite end of the same.

Abstract: The present invention briefly relates to a tool for the synchronous operation of fastening a seal ring to a connector pipe, crimping of the flange-like portion resulting from the clamping, and forming of the end portion of the connector pipe. The tool comprises a calibration ring (11) into which the pipe end portion is inserted for calibration, a pull rod (1) extending centrally through the calibration ring (11) and a set of form chucks (5) around the pull rod (1). The form chucks (5) are prestressed against and in cooperation with a cone (2) provided at the pull rod end, so that when the pull rod (1) is displaced in such a way that the cone (2) moves toward the calibration ring (11), the form chucks (5) at first are being pressed radially outward by the cone (2) to engage the inner side of the connector pipe and then are pulling the connector pipe by means of the pull rod (1).

Abstract: The bending machine for the production of rectangular sheet metal panels includes a vertically traversing blank holder which is formed of a plurality of blank-holding elements, two end elements and two spacers, a fixed counterblade, two opposing blades fixed to a vertically traversing C support and structure for positioning the metal sheet to be bent on the counterblade. There are provided on the machine programming elements traversing along the blankholder to vary the side extension of said blankholder according to the dimensions of the metal sheet to be bent. There is also provided the possibility of expanding and contracting the blankholder sidewise at the beginning and at the end respectively of the bending operation of a long side of the metal sheet.

Abstract: The folding press provides two blades 7 and 8 which are supported and actuated by a cutter block 6 which is C-shaped and which is movable in the vertical direction with respect to two counterblades 1 and 5 between which the plate 19 is placed. The cutter block 6 is actuated by one or more cylinders 9 of the fluid-dynamic type and and in its rear part has rolling elements 14 and 15 which move on tracks 16 and 17, the latter extending essentially in the vertical direction and having curved portions 18 at the extremities. The rolling elements travelling on the tracks cause the cutter block 6 to make a motion of curvilinear shape, a fact which causes the operation of the blades 7 and 8 and the folding of the plates. There are also provided an eccentric structure 12 and a pivot 13' which are capable of varying the position of the cylinders 9 so as to vary the folding angle of the border of the plate 19 upwardly or downwardly, the folding being determined respectively by the lower blade 8 and by the upper blade 7.

Abstract: There is provided a new and useful slip lock forming apparatus comprising a support structure, a forming die mounted on the support structure, a clamping mechanism mounted on the support structure and comprising a pair of clamping members movable between an open and a closed position for holding a workpiece in position relative to the die, a press mechanism mounted on the structure and comprising a pair of pressing surfaces at least one of which is movable relative to the other between a first position in which the surfaces are in contact and a second position in which the surfaces are spaced from each other, and a forming bar mounted on the structure and movable between a retracted position and an extended position for forming a workpiece around the die.

Abstract: A method of and tools for forming sewing machine binder strip folders for folding a cloth binder strip laterally as it is fed to the sewing machine needle for stitching the folded binder strip to fabric which is fed past the needle with the folded strip.

Abstract: The present invention relates to a bending machine having a bottom die on which a sheet metal workpiece is supported horizontally in a frame body and an upper die which secures the workpiece by pressing against the bottom die. A bending beam is freely movable in the vertical direction to bend the edges of the workpiece when the workpiece is secured between the top and bottom dies. The bending machine also comprises a die changing system having a plurality of elevator bases each formed with a plurality of stages which store top dies separately and a device for controlling the elevator bases individually to prepare any combination of the top dies stored on the stages and a die exchanging device for furnishing the combination of the top dies in the proper position in the bending machine by transferring it from the stages.

Abstract: Forming press for making perimetral bends on metal sheets or plates comprising a support structure having a C-shaped cross section with horizontal arms, a fixed lower counterblade, and an upper blank counterblade, movable in a vertical direction, a cutter block carriage, movably guided in the vertical direction between the arms of said support structure, an upper bending blade and a lower bending blade mounted on said cutter block carriage and having respective active parts cooperating with said counterblades for the downward and upward bending of the edge of a plate firmly held by the counterblades. In order to prevent the surfaces of the plates, when particularly treated, e.g.

Abstract: Forming press for making perimetral bends on metal sheets or plates comprising a support structure having a C-shaped cross section with horizontal arms, a fixed lower counterblade, and an upper blank counterblade, movable in a vertical direction, a cutter block carriage, movably guided in the vertical direction between the arms of said support structure, an upper bending blade and a lower bending blade mounted on said cutter block carriage and having respective active parts cooperating with said counterblades for the downward and upward bending of the edge of a plate firmly held by the counterblades.In order to prevent the surfaces of the plates, when particularly treated, e.g.

Abstract: A bending machine for flanging sheet metal elements comprises retaining rams for gripping a sheet metal element and at least one drivable bending tool, which is movable about a backing tool that is constituted by an end portion of one retaining ram. To avoid a restriction regarding the path along which the bending tool can be moved, the bending tool is mounted to be movable in two directions, which are approximately at right angles to each other, and separate drive means are provided for moving the bending tools in said two directions, respectively.

Abstract: A panel brake has an intermediate jaw disposed between one fixed jaw having a straight edge and another fixed jaw having a curved edge. The intermediate jaw is movable so as to grip a panel against either the straight edge fixed jaw or the curved edge fixed jaw.

Abstract: A bending attachment for installation in the jaws of a conventional portable bending brake for the additional bending of a previously partially bent sheet material workpiece. The bending attachment includes a horizontally oriented elongated base section which can be mounted in the jaws of the conventional portable bending brake. A workpiece holding sectional vertically upstands from the proximal edge of the base section and is in a substantially inverted U-shaped cross section.

Abstract: For bending strip material into toothed shape, the strip is introduced once into a pair of toothed jaws and a bending member is moved from one end position to another to bend the strip about one end tooth, one end flank of which is exposed. The strip is removed and then similarly bent about another end tooth, in a preferably mirror-image arranged part of the apparatus, in an opposite bending direction, thereby to form a tooth in the strip. The bending steps are repeated as often as necessary.The invention is particularly applicable to the forming of a toothed band from a plane sheet metal strip.

Abstract: A tooling for stretching and doming the end panel of an easy opening end unit wherein the end panel is axially displaced at the center thereof so as to stretch the metal of the end panel and the end panel is bent around a small radius annular corner of a support to effect a rigid and permanent displacement of the end panel in the form of a dome.

Abstract: A molding device to flatten stator coil winding heads by thrusting a hollow forming die with a convex head against draw hooks holding the other side of the winding heads.

Abstract: An apparatus for the bending of large area construction units, particularly of tightly welded tube walls for boiler construction, with a supporting table for that part of the construction unit which is not to be deformed, which is held down at least in the vicinity of the bending zone by means of a moveable press. A pivot table is provided for bending the remaining part of the construction unit, which pivot table is equipped with a slide plate abutting the construction part to be bent. The slide plate is guided freely displaceable relative to the pivot table in the longitudinal direction of the same.

Abstract: Apparatus and a method for making decorative tiles from container cans wherein a pair of clamp members have generally rectangular clamping surfaces between which a flattened can portion of a rectangular shape is clamped with at least one of its edges projecting outwardly from between the clamp members. One of the clamp members, which is preferably a base clamp member on which the other clamp member is movably supported, has an edge surface that extends from its clamping surface in a perpendicular relationship adjacent the outwardly projecting can portion edge. The other movably supported clamp member has an edge surface that is inclined with respect to its clamping surface adjacent the outwardly projecting can portion edge so that this edge can be readily bent toward the perpendicular edge surface of the base clamp member to provide a reinforcing edge flange.