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1. 发明专利

JP2002102967A TAPELIKE RESIN FILM COVERING METHOD TO CAN BARREL JOINT PART 失效
公开(公告)号：JP2002102967A
公开(公告)日：2002-04-09
申请号：JP2000256658
申请日：2000-08-28
申请人： DAIWA CAN CO LTD
发明人： MOCHIZUKI KAZUYUKI , SHOJI HISASHI , KOBAYASHI ATSUSHI
IPC分类号： B21D51/26 , B29C65/02
摘要： PROBLEM TO BE SOLVED: To correctly stick a tapelike resin film to a joint part, fill up the step difference of the joint part without a gap to sufficiently cover the metal exposure face, and prevent the gas barrier property of the tapelike resin film itself from being deteriorated more than necessity, in covering the inner face side of the joint part of a can barrel. SOLUTION: As the tapelike resin film 2, a double-layered film provided with a lower layer of a thermoplastic resin having a melting point of 175-225 deg.C to become a sticking face to the can barrel, and a upper layer of the biaxially oriented thermoplastic resin having the melting point of 195-255 deg.C, wherein the melting point of the upper layer resin is higher by 20-60 deg.C than the melting point of the lower lager resin, and the thickness of the lower layer resin exceeds the 60% of the total thickness of the film, is used to preheat the joint part of the can barrel 1. The heating temperature in this process is not within a temperature range from the adhesion start temperature to the melting point of the lower layer resin, and the heating temperature in the process of post-heating of the joint part of each can barrel 1 stuck with the tapelike resin film 2 is set at the temperature or higher than the melting point of the lower layer resin and less than the melting point of the upper layer resin, and the post-heating process is conducted in a state of nonpressing against the stuck tapelike resin film.

2. 发明专利

JP2001219932A METHOD FOR AFFIXING TAPE-LIKE RESIN FILM TO WELD SEAM PORTION OF CAN BODY 失效
公开(公告)号：JP2001219932A
公开(公告)日：2001-08-14
申请号：JP2000034447
申请日：2000-02-14
申请人： DAIWA CAN CO LTD
发明人： MOCHIZUKI KAZUYUKI , SHOJI HISASHI , KOBAYASHI ATSUSHI
IPC分类号： B26F3/10 , B23K31/00 , B65D8/22 , B65D25/00 , B65H35/07
摘要： PROBLEM TO BE SOLVED: To provide a method for separating an excess tape-like resin film between can bodies which are continuously fed. SOLUTION: A weld seam portion is heated 4 while carrying a plurality of can bodies 1 with their overlapping portion of a cylindrical portion welded in a predetermined interval so that the weld seam portions are located on the same line, the tape-like resin film 9 delivered at the same speed as the carrying speed of the can bodies is pressed 6 against an inner surface side of the weld seam portion of the can bodies, excess portions of the tape-like resin film connected between the can bodies is pressed by a press roll and stuck to a heating and pressing roll by the heating and pressing roll 7 located on the outer surface side of the can bodies and the press roll 8 located on the inner surface side of the can bodies, and the excess portion is separated from each can body and removed, and the adhesion between the inner surface side of the weld seam portion of each can body and the tape-like resin film is reinforced.

3. 发明专利

JP2000095248A FILM-ADHERED CAN BODY HAVING METALLIC LUSTER 失效
公开(公告)号：JP2000095248A
公开(公告)日：2000-04-04
申请号：JP26558698
申请日：1998-09-21
申请人： DAIWA CAN CO LTD
发明人： SHOJI HISASHI , KOBAYASHI ATSUSHI
IPC分类号： B65D8/16 , B32B15/08 , B65D25/20 , B65D25/34
摘要： PROBLEM TO BE SOLVED: To enable a design having high bright and clear metallic luster to be given by adhering a resin film provided with at least a metallic deposition layer and printing ink layer as the main layer of a thermoplastic resin film in a manner allowing the metallic deposition layer to be placed near the metallic surface of a can main body. SOLUTION: When a printed resin film 16 is stuck on the metallic surface of a can drum 2, and characters and patterns give to the can drum 2 are made into a design that makes use of metallic luster color, the printed resin film 6 is formed by setting, in order from the side of a surface treatment steel plate 5, an adhesive layer 18, a thermoplastic resin film 17, an anchor coat layer 16, a metallic deposition layer 15, an adhesive layer 14, a printing ink layer 13, a transparent thermoplastic resin film layer 12, and a lubricant-containing top coat layer 11. Namely, such a printed resin film 6 is manufactured by laminating via the adhesive layer 14 a thermoplastic resin film 7 having the printing ink layer 13 and a thermoplastic resin film 8 having the metallic deposition layer 15.

4. 发明专利

JP2000158143A WELDING CAN OVERLAP WIDTH MEASURING METHOD 失效
公开(公告)号：JP2000158143A
公开(公告)日：2000-06-13
申请号：JP34788698
申请日：1998-11-20
申请人： DAIWA CAN CO LTD
发明人： SHOJI HISASHI , ENDO HIROSHI
IPC分类号： B23K11/08 , B21D51/26 , B23K11/24
摘要： PROBLEM TO BE SOLVED: To measure a welding can overlapping width accurately by eliminating an increase or a deformation of an overlapping width of a welding can drum to be measured. SOLUTION: As a measuring sample, an unwelded part 3 is formed in midway of a welding can 1 welding part 2, and is cut at a face X-X, which includes the unwelded part and is orthogonal to a welding direction of the welding part, for measuring an overlapping width W at a welding can cutting face. A control method of a weld current for manufacturing this measuring sample is constituted so that a current attenuation point timing signal corresponding to the unwelded part of the welding can is inputted into a weld current wave forming part of a seam welding machine via CPU so as to control a current value to be a given attenuation volume.

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