Package making – Methods – Forming a cover adjunct or application of a cover adjunct to...
Patent
1989-10-06
1991-08-13
Sipos, John
Package making
Methods
Forming a cover adjunct or application of a cover adjunct to...
156252, 493930, 493963, 531331, B65B 6118, B32B 3100
Patent
active
050385470
ABSTRACT:
A process for producing a tightly sealed bag that can be easily opened by tearing at an edge thereof. According to the process a multiplicity of through cuts are formed along a line in a laminate film having at least one substrate layer and at least one heat seal layer. The laminate film is formed into an open bag with the line of through cuts provided along an edge to be sealed of the bag and edges of the open bag are heat sealed to form a sealed bag. In an alternative embodiment of the process, a multiplicity of through cuts are formed along a line in a substrate film and a heat seal film is laminated to the substrate film provided with the through cuts to form a laminate film prior to forming the sealed bag.
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Kai Hisao
Nakashima Kiyoshi
Asahi Chemical Polyflex Ltd.
Bianca Beth
Sipos John
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