Method and device for producing packaging

Patent name: Method and equipment for manufacturing packaging Patent applicants Tetravall Group Finance Co., Ltd. Principal applicant Address Swiss Ply Inventor H. Andersson Application (Patent) No. 200380105722.3 Date of application 2003.11.19 Approval of certification date Announcement No. 1723117 Approved Announcement Date 2006.01.18 Manual Disc No. D0603-1 Main Classification No. B29C65/36(2006.01) I Classification No. B29C65/36(2006.01) I Division Original Application No. Priority No. 2002.12.13 SE 0203694-5 Abstract A method and apparatus for making a package are provided. The method includes providing a tubular first package portion of a sheet comprising a thermoplastic coated packaging material having at least one layer of inductively-heatable material. The first package portion has a first sealing seam located between two opposing edge portions of the sheet. The method also includes connecting the first package portion and the second package portion together through a second seam, the first and second seams intersecting each other. The method also includes providing an induction heating device including at least two conductors extending along each other such that the conductor extends along the second seam, and providing an induced current to seal the second seam through the inductive heating device. The galvanic current is conducted through the conductor along the second seam in the opposite direction of the at least two conductors. Sovereignty item 1. A method for manufacturing a package comprising providing a tubular first packaging portion of a sheet (13) comprising a thermoplastic coated packaging material having at least one layer (16) of inductively-heatable material (11, 82) ), said first package part has a sealed first seam (23, 89, 90) between two opposite edge parts (21, 22) of said sheet, said part of said first package The second package portions (12, 81) are joined together to form a second seam (26, 83) between the first and second package portions, the first and second seams intersecting each other, and their features The method consists in that an inductive heating device (43, 83, 88) comprising at least two conductors (44, 45; 74, 75; 91, 92) extending along each other is provided so that the conductors are The second seam extends, and the second seam is sealed by providing an inductive current through the inductive heating device, the inductive current passing through the conductor along the second seam at the at least The two conductors are conducted in opposite directions (62, 63; 101, 102). International Application 2003-11-19 PCT/SE2003/001793 International Publication 2004-07-01 WO2004/054786 English