Patent ID: 8414465
Filing Date: 2013-04-09
Classification: B31B,B65D

Abstract:
1. An apparatus for successively making plastic bags each of which includes side gusset portions incorporated into superposed two layers of panel portion, the apparatus comprising: a panel material feeder by which webs of panel material are superposed into two layers and fed longitudinally thereof; a side gusset material supplier by which webs of side gusset material are folded into halves and supplied onto one of the webs of panel material before the webs of panel material are superposed into the two layers to extend longitudinally of the webs of panel material, the webs of side gusset material being spaced from and opposed to each other widthwise of the webs of panel material, the webs of side gusset material being divided into sheets of side gusset material each of which has a length, the sheets of side gusset material being spaced from each other longitudinally of the webs of panel material before the webs of panel material are superposed into the two layers, the sheets of side gusset material being interposed between the layers of panel material when the webs of panel material are superposed into the two layers; a temporary fixer by which the sheets of side gusset material and one of the webs of panel material are temporarily fixed to each other before the webs of panel material are superposed into the two layers; and a longitudinal sealer by which the layers of panel material are heat sealed with the sheets of side gusset material longitudinally of the webs of panel material after the sheets of side gusset material are interposed so that longitudinal sealed portions can be formed longitudinally of the webs of panel material, the plastic bag including the side gusset portions formed by the sheets of side gusset material and incorporated into the layers of panel portion formed by the webs of panel material, the plastic bag further including side edges formed by the longitudinal sealed portions.