Manufacturing container or tube from paper; or other manufacturi – Container making – Pliable container
Patent
1996-06-24
1998-09-01
Hail, III, Joseph J.
Manufacturing container or tube from paper; or other manufacturi
Container making
Pliable container
493 88, 493221, 493231, 493909, 493926, B65D 3310
Patent
active
058003266
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD AND BACKGROUND OF THE INVENTION
The object of the present invention is a process for manufacturing a handle for lifting and carrying a bag made of paper or other material.
The handles of paper bags are most often mounted on the body of the bag by various fastening processes. This technique is expensive because the part forming the handle is added by fastening during a second manufacturing phase. To eliminate this disadvantage, it was suggested in U.S. Pat. No. 4,221,321 that the handle of a bag be constructed by gluing a reinforcing strip along its edge, then cutting this edge at each side, folding the tabs cut out this way at a right angle and gluing them on the sheet forming the bag, and finally making a rectangular cutting below the middle part, the cut-out part being folded upward against the reinforcing strip.
This precess still entails the drawback of using an additional part, the reinforcing strip in this case, which must be glued close to the edge of the bag before the cutting and gluing operations.
SUMMARY OF THE INVENTION
The invention is based on the idea of constructing the handle of a bag from the single piece forming the latter, thus making it an integral part of the bag.
According to the invention, the handle is formed by folding or winding, as well as cutting and gluing operations carried out directly on the sheet forming the bag without the addition of any supplementary part.
Because of the innovative folding and cutting concept, the process can be carried out on one machine and in a continuous way.
The process according to the invention basically consists of folding or rolling the upper edge of the sheet used to make the bag on itself a certain number of times, making two cutting lines along said rolled or folded edge on both sides of its middle region, folding the side parts cut out from said rolled or folded edge downward at a right angle and gluing them to said sheet, and then making a cut in said middle part immediately below said rolled or folded edge.
According to one preferred embodiment of the invention, the process for manufacturing an integrally-formed handle for a bag includes the steps of turning an edge of a sheet of bag stock on itself a predetermined number of times to form a multiple-thickness handle on the sheet stock, while leaving an adjacent portion of the sheet stock unfolded. The opposed side edge portions of the handle are then folded onto and overlying the unfolded portion of the sheet stock. The folded side edge portions are then glued onto the unfolded portion of the sheet stock. The central portion of the handle is then severed from the unfolded portion of the sheet stock. The unfolded portion of the sheet stock is then folded and glued into a bag enclosure with the handle residing adjacent a side of the bag defining a top opening.
According to another preferred embodiment of the invention, the process includes the step of severing the opposed side edge portions of the handle from the unfolded portion of the sheet stock before the side edge portions are folded onto the unfolded portion of the sheet stock.
According to another preferred embodiment of the invention, the step of turning the sheet stock on itself includes the step of folding the sheet stock.
According to yet another preferred embodiment of the invention, the step of turning the sheet stock on itself includes the step of rolling the sheet stock.
According to yet another preferred embodiment of the invention, the step of folding the side edge portions of the handle onto and overlying the unfolded portion of the sheet stock includes the step of folding the side edge portions at a right angle onto the unfolded portion of the sheet stock.
According to yet another preferred embodiment of the invention, the step of folding the side edge portions of the handle onto and overlying the unfolded portion of the sheet stock includes the steps of first severing the side edge portions from the unfolded portion of the sheet stock, and then folding the severed side edge portions onto the unfolded
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Meynard Joseph
Vidal Antoine
Day Christopher W.
Hail III Joseph J.
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