B - Operations – Transporting – 31 – B
Patent
B - Operations, Transporting
31
B
B31B 1/08 (2006.01) B31B 1/16 (2006.01) B31B 1/62 (2006.01) B31B 1/90 (2006.01)
Patent
CA 2730792
There is disclosed an apparatus for successively making plastic bags in which upper and lower webs of panel material are fed longitudinally thereof and intermittently. A sheet of side gusset material is supplied to and interposed between the webs of panel material to extend widthwise thereof whenever the webs of panel material are fed intermittently. One of the webs of panel material is temporarily fixed to one of the layers of side gusset material, the other web of panel material being temporarily fixed to the other layer of side gusset material, at one of the end portions of side gusset material. The webs of panel material are joined to each other along a longitudinal joint line predetermined adjacent to one of the side edges of panel material. One of the webs of panel material is folded along a longitudinal first folded line spaced from the longitudinal joint line to make the webs of panel material open arid -make an open surface formed on the webs of panel material. One of the layers of side gusset material is folded along the longitudinal first folded lino to make the layers of side gusset material open along with the auxiliary gusset portion and make an open surface formed on the layers of auxiliary gusset portion. One of the webs of panel material is turned along a longitudinal turned line formed between the longitudinal joint line and the longitudinal first folded line to make a turned portion formed in one of the webs of panel material and superposed on the open surfaces of the webs of panel material and the layers of auxiliary gusset portion. The other web of panel material is folded along a longitudinal second folded line spaced from the longitudinal joint line to make a folded portion formed in the other web of panel material and superposed on the open surfaces of the webs of panel material and the layers of auxiliary gusset portion.
G. Ronald Bell & Associates
Totani Corporation
LandOfFree
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