Gusseted polymeric bag having stepped bottom hot air sealed

Inactive Publication Date: 2013-01-24
SHAPIRO ALLEN MICHAEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention concerns a gusseted flexible bag made from a tube of material. The bag has front and rear sides with a pair of laterally disposed opposing gusset folds that create a rear side flap folded over the front side of the bag. The gusset folds have a longitudinal crease and the tube has a polypropylene film exterior and woven polypropylene film interior. The front side flap is sealed to the rear side flap to create a sealed bottom flap. The invention provides a method for manufacturing the bag and a sealing apparatus for the bag. The technical effects of the invention include improved flexibility, durability, and seal strength of the bag.

Problems solved by technology

However, for certain applications in which the bottom seal of the bag is severely tested by heavy weight loads, the hot melt adhesive seals sometimes fail.

Method used

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  • Gusseted polymeric bag having stepped bottom hot air sealed
  • Gusseted polymeric bag having stepped bottom hot air sealed
  • Gusseted polymeric bag having stepped bottom hot air sealed

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Embodiment Construction

[0048]The various embodiments of the present disclosure and their advantages are best understood by referring to FIGS. 1A through 9 of the drawings. The elements of the drawings are not necessarily to scale, emphasis instead being placed upon clearly illustrating the principles of the disclosure. Throughout the drawings, like numerals are used for like and corresponding parts of the various drawings.

[0049]The drawings represent and illustrate examples of the various embodiments of the disclosure, and not a limitation thereof. It will be apparent to those skilled in the art that various modifications and variations can be made in the present disclosures without departing from the scope and spirit of the disclosure as described herein. For instance, features illustrated or described as part of one embodiment can be included in another embodiment to yield a still further embodiment. Moreover, variations in selection of materials and / or characteristics may be practiced to satisfy partic...

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Abstract

The present invention concerns a gusseted flexible bag In one embodiment, the flexible bag of the present invention is formed from the tube of material having a front side and a rear side. A pair of laterally disposed opposing gusset folds are formed in the tube along its sides. Each of the folds has a longitudinal crease. The bag further has a rear side flap extending from the rear side of the bag across the width of the tube which is folded over onto and hot air sealed to the front side of the tube of material. The gussets each have a slit approximate a first end of the tube thereby forming a front side flap. A front side flap may also be manufactured, if desired, which is then folded over when the rear side flap is folded so that the front side flat rests under the rear side flap. The rear side flap is hot air sealed to the front side of the bag with the front side flap being sealed therebetween. In the preferred embodiment the tube of material comprises polypropylene film on the exterior of the tube and woven polypropylene film on the interior of the tube.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present patent application is a continuation-in-part application of U.S. patent application Ser. No. 13 / 011,620, filed Jan. 21, 2011, entitled Assembly For Forming A Bag With A Pinch-Bottom Seal which is a continuation-in-part application of U.S. patent application Ser. No. 12 / 817,079, filed Jun. 16, 2010, entitled Woven Polymeric Bag With Pinch-Bottom Seal And Method Of Making The Same, which is a continuation-in-part application of U.S. patent application Ser. No. 11 / 441,517, filed Mar. 26, 2006, entitled Method for Closing and Sealing a Woven Polymeric Bag, and a continuation-in-part application of U.S. patent application Ser. No. 12 / 959,103, filed Dec. 2, 2012, entitled Method For Closing And Sealing A Woven Polymeric Bag, which claims priority to U.S. Provisional Patent Application No. 61 / 285,151, filed Dec. 9, 2009, entitled Method For Closing And Sealing A Woven Polymeric Bag, which prior applications are hereby incorporated he...

Claims

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Application Information

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IPC IPC(8): B65D30/00B65D33/16B65D33/00B65D30/20B65D30/08B31B50/64
CPCB65D33/18B65D31/10B31B70/645B31B70/64B31B2150/00B31B2160/10B31B2170/20B65D33/22B65D33/24
InventorSHAPIRO, ALLEN MICHAELABEL, JAMES W.
OwnerSHAPIRO ALLEN MICHAEL