Abstract: A method and apparatus for regulating the throughput of a rotary turret heat-sealing machine, without changing the rotational speed of the rotary turret. An indexing clutch is controlled to feed cans into the rotary turret such that only a predetermined number of sealing heads are used to seal cans fed therein. The predetermined number of cans is calculated based on a desired throughput rate. Dwell times, temperatures, and pressures can remain constant while varying radically the can throughput.

Abstract: For the manufacture of a ring part out of a flat sheet-metal part to form a lid for a lid of a can. A hot-sealable coating is provided on one side of the sheet-metal part which is then shaped into a cylindrical tube with the coating being on the inside. The axially extending edges of the tube are joined together to form a butt-joint and the inside surface thereof pressed against a cooling plate. A butt-joint welding seam is then created by means of a laser jet. The tube is separated into equal length tube sections and each is conically enlarged at one end. The other end of each tube section is bent radially inwardly to form a bearing surface for a tear-off foil. By flanging the conically enlarged end, an annular flange is created to receive a body of a can.

Abstract: Sealant is applied onto or into a folded-seam closure of a metal can. Instead of introducing sealant into the U-shaped lid flange and drying, according to the invention the compound or sealant is applied to the base flange, the base of the metal can being dipped into a current of fluid sealant or at least brought into contact with it at the surface. This substantially improves the precision of dosing and the exact amount of applied sealant.

Abstract: For the manufacture of a ring part out of a flat sheet-metal part to form a lid for a lid of a can. A hot-sealable coating is provided on one side of the sheet-metal part which is then shaped into a cylindrical tube with the coating being on the inside. The axially extending edges of the tube are joined together to form a butt-joint and the inside surface thereof pressed against a cooling plate. A butt-joint welding seam is then created by means of a laser jet. The tube is separated into equal length tube sections and each is conically enlarged at one end. The other end of each tube section is bent radially inwardly to form a bearing surface for a tear-off foil. By flanging the conically enlarged end, an annular flange is created to receive a body of a can.

Abstract: A new end wall or can bottom configuration for beverage cans and a method for its manufacture have been designed which provide an increased resistance to pressure and which allow an additional light-weighting of the can bottom.

Abstract: Sealant is applied onto or into a folded-seam closure of a metal can. Instead of introducing sealant into the U-shaped lid flange and drying, according to the invention the compound or sealant is applied to the base flange, the base of the metal can being dipped into a current of fluid sealant or at least brought into contact with it at the surface. This substantially improves the precision of dosing and the exact amount of applied sealant.

Abstract: A method of making can bodies from sheet metal for manufacturing cans includes the steps of: feeding and superimposing two sheet metal strips rolled to finished thickness, joining the superimposed sheet metal strips by a plurality of connecting welded seams running continuously in the longitudinal direction of the strip, with a spacing from one another in the transverse direction of the strip corresponding to half the can body diameter, through continuous passage of the superimposed sheet metal strips through a welding device with a plurality of welding heads disposed with corresponding spacings from one another, cutting the sheet metal strips welded together along the middle of each connecting welded seam to create a plurality of flat tubes lying beside one another, optionally rolling up the flat tubes for intermediate storage and/or transport, unrolling the optionally rolled-up flat tubes, cutting the flat tubes transversely into flat tube sections whose length corresponds to approximately the can height, a

Abstract: In the case of a process for producing a two-chamber pressure-package (R) an inner body (2) of fold-forming, respectively crumplable, material is connected with an outer casing (1) in the area of an adhesive layer (3). Then outer casing (1), adhesive layer (3) and inner body (2) together form a bead (7) around an opening (13). However, a ring (14) is removed from the outer casing before the bead (7) is formed.

Abstract: Two destacking tables and two can body forming stations are provided, the latter forming cylindrical can bodies from the metal sheets stacked on the destacking table. These can bodies are subsequently conveyed along the feed axis to the welding station, which welds the longitudinal seam of the can bodies. The provision of two destacking tables and two can body forming stations enables these elements to operate at the cycle rate of the welding station. This permits welding to be effected with an increased cycle rate, with reliable feeding of the can bodies despite this.

Abstract: Two destacking tables and two can body forming stations are provided, the latter forming cylindrical can bodies from the metal sheets stacked on the destacking tables. These can bodies are subsequently conveyed along the feed axis to the welding station, which welds the longitudinal seam of the can bodies. The provision of two destacking tables and two can body forming stations enables these elements to operate at the cycle rate of the welding station. This permits welding to be effected with an increased cycle rate, with reliable feeding of the can bodies despite this.

Abstract: A method of die-necking the open end of a can body to form a reduced diameter neck having a smooth profile comprising first forming a reduced diameter control neck at the open end of the sidewall of the can body, and then totally reforming the control neck and the adjacent portion of the sidewall to form a second reduced diameter neck. The diameter of the second neck is less than the diameter of the control neck, and the axial length of the second neck is substantially greater than the axial length of the control neck.

Abstract: Process for producing a two-chamber pressurized package having an outer body enclosing an interior space which can be subjected to pressure and forms an opening through which an inner body of a material which can be folded or crumpled is inserted. A valve is fitted thereon and the outer and inner bodies are connected to one another in a predetermined region.

Abstract: A method of forming a container body having a profiled bottom in a continuous operation wherein the body is formed from a blank of material into an inverted cup, the cup is reverse drawn and a preliminary profile is imparted to the bottom of the cup, and a final profile is imparted. The apparatus includes a die cut edge movable into telescoping relationship around a redraw die to form the inverted cup and a profile punch movable into telescoping relationship within the redraw die to form the preliminary profile against a profile pad. The profile pad is selectively supported by a pair of fluidly actuated pistons whereby, upon activation of the second piston, the final profile may be formed.

Abstract: Circular cylindrical bodies (2) are formed from rectangular sheet-metal blanks by rounding and longitudinal seam welding. These are widened oval-conically over their whole length in a first expanding operation and then relaxed again. Then the bodies (2) are widened in a second expanding operation so that they acquire their polygon-like, particularly rectangle-like, cross-sectional shape over their whole length. As a result, the bodies are stressed at their marginal regions at the ends in such a manner that these marginal regions do not become undulatory and can therefore be satisfactorily joined with a can cover or bottom.

Abstract: A high strength metallic drum is disclosed having an high internal volume for given external dimensions. The drum is divided into annular top, middle and bottom drum sections. Each drum section has a constant diameter, with the diameters of the top and bottom drum sections being larger than the diameters of the middle drum section. A pair of swedge rolling hoops are provided at the boundaries between adjacent sections to give the drum rigidity. A first one of the rolling hoops joins the top and middle sections while the second rolling hoop joins the middle and bottom sections. Each swedge rolling hoop has a gripping surface that extends outwardly from the middle drum portion to facilitate handling the drum. The maximum diameters of the swedge rolling hoops are larger than the diameters of each of the sections they join. In a preferred 55 gallon drum embodiment, the top and bottom sections have the same diameter and the swedge rolling hoops are mirror images of each other.

Abstract: A rupturable can member (10) of sheet metal has a pair of scorings (16) which define a tearing strip (18) laterally. Welded onto the tearing strip (18) is a tongue (20) which has a thickened portion (24) at its welded-on end (22). This thickened portion is formed by a margin folded back towards the other free end (26) of the tongue (20).

Abstract: A die necking method and apparatus for producing a smooth tapered wall between the container side wall and a reduced diameter neck includes a plurality of rotatable necking turrets that each have a plurality of identical necking substations each having a necking die. The necking dies in the respective turrets have an internal configuration to produce a necked-in portion on the container which has a first arcuate segment integral with the container side wall and a second arcuate segment integral with the reduced diameter neck. The necking substations also have a floating form control element that engages the inner surface of the container to control the portion of the container to be necked. The necked-in portion is reformed in each succeeding turret by dies to produce a smooth tapered wall between the arcuate segments.

Abstract: The invention relates to a method of manufacturing a body for a container, in which a body having a weldseam along its longitudinal direction is formed by bending material in sheet form and welding the overlapping edges of the bended material together, and the wall of the body having the longitudinal weldseam is thinned.Preferably thinning is obtained by wall-ironing. It is advantageous that the wall thickness of a wall part close to wall end of the body is larger than that of a remaining part of the body and eventually prior to thinning has been reduced and that prior to being reduced the body is provided with a gripping rim and/or cover.

Abstract: A steel sheet for making cans carrying a layer of a thermoplastic resin having a thickness of 3 to 100 microns on at least one surface thereof which, when shaped into a can, will define its inner surface, and a foil of aluminum or an aluminum alloy having a thickness of 5 to 100 microns on the resin layer. Also disclosed is a can for holding a drink which is formed from such a steel sheet, and which has a layer of a thermosetting resin on the foil. A method of making any such can is also disclosed.

Abstract: The disclosure relates to a method of manufacturing a body formed of a shaped sheet metal blank having an opening tear strip terminating in a tongue. Overlapping edges of the blank are welded together and at the tear strip melting of a tin coating of the blank occurs so that at the tear strip the edges of the blank are linked by melted tin, or welding is completely interrupted to form a slot at the tear strip between the overlapping edges of the blank and the slot using a sealing material. Further, the disclosure relates to a metal blank for a can body having a tear strip formed there across by two weakening scores extending transversely to the edges of the blank and terminating in a tongue. The tear strip at one of the edges of the blank is provided with a covering and/or oxide layer which has a relatively low electrical conductivity.

Abstract: In a metal can at least one component having an edge portion forming part of a seam is made from pre-laminated plate comprising a metal substrate with a polymeric film bonded over the whole of one or both of its sides. An aerosol valve cup is made from such plate with its underside having such a polymeric layer, and is secured to the can body in a seam by conventional mechanical deformation, such as swaging, so as to compress the polymeric layer in the seam. This provides a satisfactory seal without the need for any additional sealing material within the seam.

Abstract: There is provided a method of making a welded can body having a mash seam weld which includes a heat affected zone extending continuously in the longitudinal direction thereof and is formed with no pitting. The weld is formed by mash seam welding a lapped portion of a can body preform made of a surface treated steel sheet while allowing an alternating current to flow through the lapped portion via a water-cooled elongated electrode and a water-cooled rotary electrode. The alternating current has a crest factor satisfying an expression 1.5.ltoreq.Ip/Ie.ltoreq.2.0, where Ie and Ip designate an effective value and a peak value, respectively, of the alternating current.

Abstract: A method of and apparatus for reforming an external curl on a tubular side wall of a container body by providing a first die having a groove to engage with the inside and outside of the curl to prevent lateral spreading of the curl and a second die having a convex surface enterable into the groove of the first die and a mechanism to cause relative motion in a direction parallel to the axis of the body as between the first and second dies to crush the curl, the groove of the first die being in engagement with an upper surface of the curl to prevent lateral spread of the curl, and the second die being applied to an underneath surface of the curl so that the later-noted relative motion between the first and second dies imposes a crushing force to create a reformed curl having a first annulus of arcuate cross section extending outwardly in a lateral direction from the side wall to define a convex external surface; a folded portion turning radially inward from the outer periphery of the first annulus, and a second

Abstract: A method of, and apparatus for, manufacturing a metal can (1) with an annular seam (5) which is capable of withstanding high internal pressures and resisting chemical action. A piece of thermoplastic tape is heat bonded to the outer surface (10a.sub.3) of the open end portion (10a ) of a first can section (10) so as to leave a portion (11a) projecting therefrom. After being bent radially inwardly of the first can section, the projecting tape portion is further folded back into forced contact with the inner surface (10a.sub.2) of the open end portion of the first can section by means of a mandrel (16). The open end portion of the first can section is then heated, with the fold of the tape held pressed against its inner surface by the mandrel, to cause adhesion of the thermoplastic tape to the outer surface, edge (10a.sub.1), and inner surface of the open end portion of the first can section. An adhesive layer (4) is thus provided.

Abstract: Methods of necking-in and flanging tubular can bodies having body walls of constant thickness. A pilot die initially inserted into the tubular can body reverses its direction during the necking-in operation with respect to the motion of a ring die member that contacts the exterior surface of the tubular can body member. This concurrent reverse movement of the two forming dies eliminates wrinkles in the necked-in region and produces a container body with increased columnar strength. Repetitive use of the method produces containers with two or three necked-in portions. A method is also disclosed for relubricating the necked-in area of the tubular can body between the successive necking stations.

Abstract: Tinplate container with externally welded seam is formed of electrolytic unreflowed tinplate with external tin coating of low coating mass (less than 2 g/m.sup.2); the solderability of such tinplate being comparable with conventional reflowed tinplate of much higher coating mass. The unreflowed tinplate of low coating mass may be produced by Halogen electrotinning process in which ratio of fluoride ions to stannous tin ions in the rinsing section is maintained at unprecedented high level (not less than 10:1), the pH of the rinsing agent is maintained at less than 4 and the current density of the electrodeposition current is in the range 600 to 1,600 amperes per square meter of strip steel.

Abstract: Disclosed is a process for preparation of metal vessels, which comprises lap-bonding circumferential open end portions of outer and inner members, each consisting of a formed seamless metal cup, to each other through an adhesive, said process being characterized by fitting both the outer and inner members to each other through an adhesive layer interposed between the open end portions of both the members, heating the fitted portions of both the outer and inner members so as to melt the adhesive layer, and cooling the fitted portions so that the temperatures of the fitted portions of both the outer and inner members are substantially equal to each other just before solidification of the adhesive layer and the adhesive is filled between both the open end portions.

Abstract: A method of forming a drawn and ironed aluminum container is disclosed herein. The aluminum stock material is initially provided with a thin layer of a particular lubricant applied to one or both surfaces thereof. The lubricant is unemulsified (i) peanut oil and/or (ii) certain oleic acid esters of aliphatic polyhydric alcohols. The method contemplates applying the thin layer of said lubricant to an aluminum stock, cutting a disc and forming a drawn and ironed container utilizing said lubricated disc without additional lubricant being applied to the tooling.

Abstract: Can manufacture, particularly the formation of can necks, is improved by modification of necking tooling to stop the rearward travel of the interior of its two coaxial can-deforming members between which can bodies frequently become jammed. The addition of a stop means to the base of the tooling prevents the concurrent travel of the interior member with the outer member due to the frictional engagement of the can body between the two tooling members. With the interior member stationary, the outer member can be driven from the jammed can.

Abstract: Disclosed is a process for the preparation of metal vessels, which comprises lap-bonding both the circumferential end portions of upper and lower members, each consisting of a seamless formed metal cup, through a layer of a hot adhesive interposed therebetween, wherein a high frequency induction heating coil is arranged so that the coil covers a part, smaller than the semicircle, of the circumferential portion to be formed into a seam, which circumferential portion consists of said end portions engaged with each other through the hot adhesive layer, electricity is applied to the heating coil to induce an eddy current passing through said end portions and the circumferential portion and the heating coil are rotated relatively to each other, whereby both the end portions are heated and a seam is formed by heat bonding.

Abstract: A precoated stock material for use in forming a drawn and ironed container and a method of forming such container is disclosed herein. The stock material initially has a layer of lubricant applied to one or both surfaces of the metal base with the lubricant consisting essentially of a fatty acid ester of a mono or polyhydric alcohol and having a distribution of less than 3 mg./in..sup.2. The method contemplates applying the layer of lubricant to a metal stock, such as aluminum, black plate or tinplate, cutting a disc from the metal stock, and transforming the disc into a drawn and ironed container without additional lubricant being applied to the tooling.

Abstract: A steel sheet container wherein the bottom wall is integral with the body and wherein the container is formed by a drawing operation with there being three drawings of the metal in sequence. Most particularly, the steel sheet has on the opposite surfaces thereof a coating of tin with the surfaces of the steel sheet being very smooth so as to permit the formation of the tin with a matte finish. The finish of the steel sheet should range generally from on the order of 10 microinch minimum to 30 microinch maximum.

Abstract: In a metal container having at least one seam by which two overlapping metal edges are joined together, at least one of the edges (58) has a resilient polymeric layer (56) bonded firmly to the metal, so that when that edge (58) is seamed to a second edge (60) the polymeric layer deforms without destroying the bond, and becomes bonded to the second edge, so creating a seal against leakage. A layer of latex no greater than 0.10 mm thick may optionally be included. Seams to which the invention is applicable include swaged seams, interlocked double seams or longitudinal side seams. In the latter case the polymeric layer may provide the bond to secure a single lap seam.

Abstract: A method for hand forming cooking utensils, a portion of the formed utensil being disposable.A wire frame is bent to define the shape, in plan view, of the desired cooking utensil. To form a two-dimensional cooking utensil, a foil means is wrappingly secured to the wire frame. To form a three-dimensional cooking utensil, the wire means is first deformed to conform to the perimetrical configuration of a mold means which is preferably a staple item of commerce such as a mayonnaise jar or a number 10 can. After removing the wire member from its surrounding engagement with the mold member, a foil means is manually made to conform to the shape of the mold means. The wire member is re-positioned about the perimeter of the mold means, spaced downwardly from the upstanding free end of the mold means, assuming such mold means is supported on one of its ends by a support surface, a predetermined distance equal to the depth of the desired cooking utensil.