Bags made from thermoplastic synthetic resin sheeting having cutoff weld seams and process for producing the bags
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United States of America Patent
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Jun 5, 1990
Grant Date -
N/A
app pub date -
Aug 5, 1988
filing date -
Aug 5, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for the production of bags from thermoplastic synthetic resin sheeting with a bottom seam and/or a lateral seam fashioned as a cutoff weld seam obtained by severing tubular film sheets in the bottom zone, wherein there is produced by heat contact welding, at a station upstream of a transverse seam cutoff welding of the bottom seam or lateral seam, a wide flush weld seam over the entire width of the tubular film sheet and/or of the bag bottom to be produced, and subsequently the transverse cutoff weld seam is formed over the flush weld seam, extending within the flush weld seam.
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