Patent ID: 7234286
Filing Date: 2007-06-26
Classification: B29C,B65B

Abstract:
1. A method for manufacturing a package, comprising: a package-joining belt forming step for forming a package-joining belt in which packages each containing a material filled in between superposed scar-free films and each sealed at joint portions and a side edge portion are joined with each other by the joint portions, the package-joining belt forming step including: a superposing process of folding one belt-shaped film widthwise or superposing two belt-shaped films one upon the other, to form superposed films; a joint portion forming process of forming band-shaped joint portions at predetermined intervals longitudinally of the superposed films, the joint portions each extending over an entire width of the superposed films and joining the superposed films together; a side edge portion forming process of forming a band-shaped side edge portion joining the superposed films together along at least one side edge of the superposed films; and a filling process of filling the material into regions defined by the joint portions and the side edge portion; and a scar forming step for forming plural elongate scars each extending adjacent and substantially perpendicularly to said side edge in the side edge portion, wherein the package-joining belt forming step and the scar forming step are carried out, while the package-joining belt is drawn, and the scar forming step causes the package-joining belt to pass between a processing roller and a press roller with a portion thereof adjacent said side edge in the side edge portion being sandwiched therebetween, the processing roller comprising plural disks each having plural cutting edges extending substantially in a thickness direction thereof and formed over an entire circumference thereof, the plural disks being stacked in a manner that the cutting edges of one disk are spaced apart from those of an adjacent disk, the press roller having a smooth peripheral surface, the processing roller and the press roller being positioned in a manner that the cutting edges of the processing roller are allowed to come into substantial contact with the peripheral surface of the press roller.