PLASTIC BAG MAKING APPARATUS

摘要

Plastic bags are made by feeding webs joined at a joint line, and by supplying a side gusset sheet between the webs. The webs are temporarily fixed to two side gusset layers. One web is folded along a first folded line spaced from the joint line to open the webs and form an open surface. One side gusset layer is folded along the first folded line to open the side gusset layers along with an auxiliary gusset portion and form an open surface on layers of the auxiliary gusset portion. One web is turned along a turned line formed between the joint line and the first folded line to make a turned portion superposed on the open surfaces. The other web is folded along a second folded line spaced from the joint line to make a folded portion superposed on the open surfaces.