Abstract: Disclosed is a process for the preparation of welded cans, which comprises forming a blank comprised of a surface-treated steel plate into a cylinder and passing a lap portion of the formed cylinder between a pair of electrode rollers through an electrode wire to effect electric resistance welding, wherein said surface-treated steel plate comprises a layer of metallic tin or a tin-iron alloy formed on the steel plate substrate in an amount of 0.05 to 1.0 g/m.sup.2 as calculated as metallic tin and a hydrated chromium oxide layer formed on said tin layer in an amount of 0.005 to 0.05 g/m.sup.2 as calculated as metallic chromium and electric resistance welding is carried out in an inert atmosphere in the state where an electrode wire having a plating layer of tin or a tin alloy having a thickness of 0.1 to 20 .mu.m is kept in close contact with the surface of said surface-treated steel plate.

Abstract: Disclosed is a sealing compound for can ends excellent in the adaptability to the lining operation, which comprises an aqueous latex of a styrene-butadiene rubber, a tackifier and a filler, wherein said latex contains styrene-butadiene rubber particles having a number average particle size of from 1600 to 3000 A, which are stabilized by an emulsifier or a dispersant.

Abstract: Disclosed is an easily openable heat seal lid for sealing a vessel proper by forming a heat-sealed portion between the lid and the vessel proper, which comprises a laminate comprising at least an inner face member composed of a thermoplastic resin and a metal foil, wherein scores defining a portion to be opened are formed on the side inner than the portion to be heat-sealed so that the scores extend to the midway of the thickness direction of the metal foil, and said inner face member comprises at least one heat-sealable thermoplastic resin layer having an adhesion strength of at least 800 g/15 mm to the metal foil, a tear strength lower than 3.0 kg and a tensile modulus of at least 300 kg/cm.sup.2. In this heat seal lid, the resin layer can be broken sharply along the scores and opening can be accomplished very easily.

Abstract: Disclosed is a process for the preparation of welded cans, which comprises forming a blank into a cylinder and passing a lap portion of the formed cylinder between a pair of electrode rollers through an electrode wire to effect electric resistance welding, wherein said blank is a tin-free steel blank comprising a steel plate substrate, a layer of metallic chromium formed on the surface of the steel plate substrate and a layer of chromium oxide formed on the metallic chromium layer, and electric resistance welding is carried out in an inert atmosphere in the state where an electrode wire having a plated layer of a soft metal selected from the group consisting of tin and alloys thereof, the thickness of said plated layer being 0.1 to 20 .mu.m, is kept in close contact with the chromium oxide layer of the tin-free steel blank.

Abstract: A molding tool for forming a closure shell liner on the inside surface of a closure shell having a skirt with a groove therein. The tool has a central molding member and a shell positioning sleeve concentric with and external of the central member with the sleeve having an upper portion adapted to be positioned opposite the groove in the skirt of the shell and a lower portion extending to the lower end of the sleeve. The outer diameter of the upper portion of the sleeve exceeds the outer diameter of the lower portion by an amount equal to twice the depth of the groove.

Abstract: Disclosed is an easily openable vessel closure comprising a can end member having a preformed opening, an easily peelable opening piece which is applied to the outer side of the can end member so that the opening piece covers said opening and adheres closely to the peripheral portion of said opening, and a protecting covering layer formed to cover the cut edge of the opening of the can end member, wherein the protecting covering layer is formed of a thermoplastic resin having a heat bondability and the protecting covering layer includes a film layer heat-bonded to the inner and outer peripheral portions of the opening and a projecting cover heat-bonded to the cut edge of the opening integrally with said film layer, and said opening piece is heat-bonded to the can end member through the protecting covering layer located outside the can end member and said protecting covering layer is stuck closely to the cut edge of the opening so that when the opening piece is peeled, the protecting covering layer is left on

Abstract: A peelable adhesive structure is disclosed which comprises a plurality of parts at least one of which is made of metal, adhering together by means of a coating, characterized in that said coating has a peelable surface formed between a first layer of a denatured hydrocarbon resin or denatured hydrocarbon resin composition having an acid value of from 0.1 to 20 and a second layer containing an epoxy resin.

Abstract: Disclosed is a metal bottle adhesive for lap-bonding upper and lower members, each consisting of a cup-like formed article of a metal, on the peripheral ends thereof, said adhesive comprising at least one high-molecular-weight thermoplastic resin having a post crystallinity .DELTA.Wc, defined by the following formula, of less than 20%:.DELTA.Wc=Wc.sub.II -Wc.sub.Iwherein Wc.sub.I stands for the crystallinity (%) of the adhesive which has been molten at a temperature higher by 30.degree. than the softening point thereof and then naturally cooled at room temperature, determined according to the density method, and Wc.sub.II stands for the crystallinity of the adhesive which has then been immersed in water maintained at 70.degree. C. for 10 hours and then naturally cooled and dried at room temperature, determined according to the density method,a shear creep compliance J(t).sub.t=2 hrs of less than 10.sup.-4 cm.sup.2 /hyne at 90.degree. C.

Abstract: Disclosed is a laminated plastic container in the form of a bottle, the wall of which comprises a substrate formed of a melt-moldable plastic material, a coating layer formed on at least one surface of the substrate, said coating layer being composed of a copolymer consisting essentially of 99 to 70% by weight of vinylidene chloride and 1 to 30% by weight of at least one acrylic or methacrylic monomer and further including up to 100 parts by weight of at least one member selected from other ethylenically unsaturated monomers per 100 parts by weight of the total amount of said two monomers, said copolymer having an oxygen permeation coefficient of less than 9.times.10.sup.-14 cc.multidot.cm/cm.sup.2 .multidot.sec.multidot.cmHg as measured at a temperature of 20.degree. C. and a relative humidity of 100% and a water vapor permeability coefficient of less than 3.times.10.sup.-3 g.multidot.cm/m.sup.2 .multidot.

Abstract: Disclosed is a seam welded tinplate can having a side seam formed by welding, wherein the inner and outer surface portions of said side seam comprise an outermost layer formed of an oxide, which has a thickness of 50 to 400 A, and an intermediate layer formed mainly of an iron-tin alloy layer, which has a thickness corresponding to 5 to 100% of the thickness of the total tin layer, and a resin or resin composition containing a polar group selected from the group consisting of carbonyl, hydroxyl, ether and epoxy groups at a concentration of 10 to 2000 millimoles per 100 g of the resin is coated on at least one of said inner and outer surface portions of said side seam.

Abstract: A molding device for forming a liner on the inside surface of the top panel of a closure shell. The device has a molding tool disposed above an anvil which is relatively movable towards and away from the tool by an elevator mechanism. The molding tool includes a center punch. An annular bushing is positioned externally of the center punch and is movable over a predetermined range with respect to the punch. Resilient means are provided for urging the bushing upwardly with respect to the punch and a lowering mechanism is included for moving the bushing downwardly against the force of the resilient means.

Abstract: Method and apparatus for inspecting empty cans entirely automatically includes a flange inspecting process and a drawing condition inspecting process. The flange and the drawing condition inspections are simultaneously carried out in the same inspecting station during the forcible rotation of the can. The flange portion is checked for craks and length, and the outer body surface is checked for the drawing conition respectively in a non-destructive and contactless manner by utilization of static electromagnetic inspection and light reflection inspection methods. A prestored reference value signal, which is compared with a converted electrical signal for the determination of whether cans are good or not, is a signal of a value calculated by a microcomputer on the basis of values which are sampled, equally divided, signal values corresponding to one rotation of a forcibly rotated standard good empty can.

Abstract: The apparatus comprises a sealed chamber including a sterilizing section, a cooling section and a conveyor including carrier receivers and circulated through the sterilizing and cooling sections. The flat flexible packages containing substances to be sterilized are contained in rotatable carriers. With one side of the sealed chamber is provided a sealing means through which the carriers are charged and discharged into and out of the sealed chamber.

Abstract: Disclosed is a welded side-seamed can formed by welding a can blank comprising a steel plate substrate having, formed thereon, a coating layer consisting of a metallic chromium layer and a chromium oxide layer formed on the metallic chromium layer, wherein the so-formed side seam has an exposed steel plate layer consisting of a compact and dense steel oxide formed mainly of magnetite, which has a thickness of 50 to 800 A, especially 50 to 400 A, and a coating of a resin or resinous composition consisting of carbonyl, hydroxyl, ether and epoxy groups at a concentration of 10 to 2000 millimoles per 100 g of the resin is formed on at least one surface portion of said side seam through said steel oxide layer.

Abstract: Disclosed is a side seam-coated welded can comprising a welded can body having a seam on the side face and a resin coating layer covering at least one surface side of the seam, wherein said coating layer comprises a thermosetting resin and a thermoplastic resin having a softening point of 50.degree. to 300.degree. C. as determined according to the ring and ball method, at a volume ratio ranging (A) from 95/5 to 25/75 or (B) from 20/80 to 1/99, and one of said two resins is present in the coating in the form of a continuous phase and at least a part of the other resin is present in the coating in the form of fine dispersed particles.This can is excellent in corrosion resistance and processability.

Abstract: A holding spindle mountable on a spindle shaft and utilized for printing and coating cylindrical containers includes an outer sleeve for receiving a cylindrical container, the outer sleeve having an inner diameter less than the diameter of the cylindrical container to thereby provide a clearance between the outer sleeve and the cylindrical container disposed thereon. Bearings rotatably mount the outer sleeve on the spindle shaft. A bottom receiving pad on the outer sleeve has a seating surface having a curvature corresponding to the curvature of the bottom surface of the cylindrical container. An aspirating device applying a vacuum to the seating surface has an opening in the seating surface leading to a source of vacuum and providing a vacuum to effect seating and mating of the common curvature of the seating surface and the inside bottom surface of the cylindrical container to thereby enhance the stability of the cylindrical container on the holding spindle.

Abstract: A closure (2) having a metal shell (4) and a synthetic resin liner (10) having a first annular projection (12) and a concentric second annular projection (14). The second annular projection is adapted to engage and seal with an upper surface (24b) of the mouth (18) of a container with an inner peripheral surface (12a) of the second annular projection is adapted to engage the outer peripheral surface (24a) of the mouth (18) of the container.

Abstract: An apparatus for cooling a transfer mandrel on whose top portion a thermoplastic resin parison is mounted and which is rotatably engaged with the peripheral portion of a rotary table. The apparatus is arranged along the peripheral portion of the rotary table adapted to rotate oppositely to a heating means. The apparatus comprises a cooling block having a cavity through which cooling water flows and a concave surface opposing to the transfer mandrel which has a profile conforming to the cylindrical portion of the transfer mandrel, means for adjusting the position of the cooling block, and a spring which pushes a surface portion opposite said concave surface of the cooling block.

Abstract: A closure cap having a liner adhered to a cap shell by a plurality of coating layers. Prize markings are printed on one of the coating layers and are positioned between the coating layers. The peel resistance in the interface between the coating layers is less than that between the topmost coating layer and the liner to assure that the prize markings will be transferred to the liner when the liner is peeled from the cap shell. The liner includes a starting portion which adheres to the topmost coating layer only slightly to facilitate easy removal of the liner from the cap shell.

Abstract: A peelable bonded structure having a peel strength of 0.05 to 5 kg/cm comprises a plurality of articles, at least one of which is made of metal, bonded together through a composite coating layer. The composite coating layer is composed of adjacent first and second coating layers at least one of which comprises (A) a modified olefin resin having a carbonyl group concentration of 0.01 to 200 milliequivalents per 100 g of the olefin resin and (B) a coating film-forming base resin at an (A)/(B) weight ratio of from 0.2/99.8 to 40/60 and has a multi-layer distribution structure having resin concentration gradients in the thickness direction such that the modified olefin resin (A) is distributed predominantly in the portion contiguous to the interface between the two coating layers and the base resin (B) is distributed predominantly in the opposite portion.