Bag making machine
AssigneeTotani Corporation
InventorMikio Totani
Life of this patent
Estimating the term…
Abstract
Plastic bag making apparatus by which it is arranged that even if a bottom gusset member is not specially supplied, a bottom gusset can be incorporated into a plastic bag. As continuous trunk members (1,2) are fed, they are guided by a trunk guide mechanism (16-29) and folded along a longitudinal fold line (8). Then, the folded portion (4) is folded back along a longitudinal fold-back line (10), whereby a twofold section is formed of the trunk members, with the continuous trunk members forming the trunk of the plastic bag, the twofold section forming the bottom gusset of the plastic bag.
Claims6
An apparatus for successively making plastic bags each of which includes a bottom gusset portion incorporated into superposed two layers of panel portion, the apparatus comprising:
- panel material feeding means by which web means of panel material is fed longitudinally thereof;
- and
- panel material guide means by which the web means of panel material is guided to be folded and folded back along a longitudinal folded line and a longitudinal folded back line when being fed so that a folded portion can be formed in the web means of panel material and folded into halves, the panel material guide means comprising:
- first guide means by which the web means of panel material is guided to be folded along the longitudinal folded line into superposed two layers when being fed;
- and
- second guide means by which the web means of panel material is guided to be folded back along the longitudinal folded back line when being fed and after being folded into superposed two layers so that the folded portion can be formed in the web means of panel material and folded into halves, the plastic bag including the bottom gusset portion formed by the folded portion and incorporated into the layers of panel portion which are formed by the web means of panel material.
An apparatus for successively making plastic bags each of which includes a bottom gusset portion incorporated into superposed two layers of panel material, the apparatus comprising:
- panel material feeding means by which web means of panel material is fed longitudinally thereof, the web means of panel material being superposed into two layers each of which has opposite side edges;
- panel material guide means by which one of the layers of panel material is guided to be folded and folded back along a longitudinal folded line and a longitudinal folded back line near one of the side edges thereof when being fed so that a folded portion can be formed in said one of the layers of panel material and folded into halves, the folded portion having a free side edge formed by said one of the side edges, said folded portion being interposed between the layers of panel material;
- and
- longitudinal seal means by which the free side edge is heat sealed with the corresponding side edge of the other layer of panel material before or after the folded portion is folded into halves, the panel material guide means comprising:
- first guide means by which said one of the layers of panel material is guided to be folded along the longitudinal folded line into superposed two layers when being fed;
- and
- second guide means by which said one of the layers of panel material is guided to be folded back along the longitudinal folded back line when being fed and after being folded into superposed two layers so that the folded portion can be formed in said one of the layers of panel material and folded into halves, the plastic bag including the bottom gusset portion formed by the folded portion and incorporated into the layers of panel portion which are formed by the web means of panel material.
Dependencies are inferred from the claim text.