Plastic bag making method and apparatus
AssigneeTotani Corporation
InventorMikio Totani
Life of this patent
Estimating the term…
Abstract
Problems concerning adhesion strength and aging time are eliminated in plastic-bag production in which a strip sheet is bonded with an adhesive and a handle is formed from the strip sheet on an outer surface of a plastic bag. Provided is a bag-making machine in which a strip sheet (17) and a web material are disposed so as to face each other and are pressed, with a high-adhesion adhesive (21) and another adhesive (25) interposed therebetween. The strip sheet (17) is provisionally fixed to the web material with the latter adhesive (25). This web material after the provisional fixing is wound on a roll, and a plastic bag is produced after lapse of an aging time for the high-adhesion adhesive (21). In this machine, the web material is supplied from the roll, and a plastic bag is produced from the web material.
Claims7
A method of successively making plastic bags comprising:
- preparing a continuous web along with strip sheets, the continuous web having opposite surfaces, each of the strip sheets having opposite surfaces;
- applying a strong adhesive agent and an additional adhesive agent to one of the opposite surfaces of the strip sheet or the continuous web, the strong adhesive agent needing a curing time;
- making the strip sheet and the continuous web opposed to and pressed against each other so that the strong adhesive agent and the additional adhesive agent can be interposed between the strip sheet and the continuous web, the strip sheet and the continuous web being temporarily fixed to each other with the additional adhesive agent;
- taking up the continuous web on a roll after the strip sheet is temporarily fixed;
- and
- supplying the continuous web from the roll after the curing time elapses in an apparatus for successively making plastic bags, each of the plastic bags including a certain portion formed of the continuous web, the certain portion having an outer surface on which a handle is formed of the strip sheet.
An apparatus for successively making plastic bags by supplying a continuous web from a roll, the apparatus being characterized in that the roll is acquired by taking up the continuous web after a strip sheet and the continuous web are opposed to and pressed against each other so that a strong adhesive agent and an additional adhesive agent can be interposed between the strip sheet and the continuous web every unit length of the continuous web, the strong adhesive agent needing a curing time, the strip sheets being adhered to one of the opposite surfaces of the continuous web not only with the additional adhesive agent but also with the strong adhesive agent when supplying the continuous web from the roll.
Dependencies are inferred from the claim text.