Apparatus for forming bags of thermoplastic material
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United States of America Patent
Stats
-
Jul 7, 1981
Grant Date -
N/A
app pub date -
May 24, 1979
filing date -
Jun 7, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In an apparatus for forming and separating the side edges of plastic bags of the type which have opposed interlocking closure strips, an intermittent transport device transports a half-tube of thermoplastic sheeting to a welding device. The sheeting is stopped while welding is performed. At a milling station upstream of the welding device, a milling apparatus is actuated while the half-tube is stopped to mill off a short length of each of the opposed closure strips at a position which coincides with the position at which welding will later be performed.
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