Method and a machine for making packaging bags using a flexible film and a package bag obtained thereby
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United States of America Patent
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-
Mar 23, 1999
Grant Date -
N/A
app pub date -
Jul 16, 1997
filing date -
Jul 16, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a method of automatically forming, filling, and closing reclosable packaging bags based on a film of flexible material, e.g. a thermoplastic material, provided with added-on strips and in particular complementary male and female slideway closure strips, the method comprising the steps consisting in: providing a feed of flexible film; providing a feed of strips; and fixing the strips on the film by heat sealing; wherein: the step of feeding strips consists in providing a tape of flexible material carrying the complementary strips; and the step of fixing consists in heat sealing the tape onto the film prior to feeding the resulting assembly to the tube-forming neck of an automatic machine for forming, filling, and closing packaging bags. The invention also relates to machines for implementing the method and to the resulting bags.
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