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Pack of unfolded plastic bags

a technology of plastic bags and unfolded bags, applied in the field of plastic bags, can solve the problems of reducing load strength, affecting the shelf life of plastic bags,

Inactive Publication Date: 2010-07-01
IPS INDS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a strengthened plastic T-shirt style bag with a bottom seal made by welding together multiple layers of plastic film. The bag has a body with four layers, two gusset layers, and two internal ribs. The bag also has handles and a mouth. The technical effect of this invention is to provide a durable and reliable plastic T-shirt style bag that can withstand heavy use.

Problems solved by technology

Plastic bags can be a significant overhead cost for a retailer.
A problem with such an approach, however, is that thinner walls generally translate to decreased load strength.

Method used

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  • Pack of unfolded plastic bags
  • Pack of unfolded plastic bags
  • Pack of unfolded plastic bags

Examples

Experimental program
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Embodiment Construction

[0028]The invention will now be described more fully with reference to FIGS. 1-20, in which embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, reference designators may be duplicated for the same or similar features. The figures are not drawn to scale; some features are exaggerated for clarity.

[0029]FIG. 1 is a flow diagram of a bag manufacturing process, according to an embodiment of the invention. The illustrated process begins in step 105, and receives a polyethylene tube in step 110. Blow molding and other methods for forming plastic tubes with desired wall thicknesses and diameter are known in the art. In embodiments of the invention, the wall thickness of the tube received in step 110 is substantially uniform at approx. 9 to 10 um. Such a dimension is relatively thin compared to a film thickness of approx. 14 to 15 um that is more t...

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PUM

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Abstract

In an embodiment of the invention, a bottom seal of a plastic bag is strengthened by welding together 8 layers of plastic film. In one respect, an embodiment of the invention provides a bag pack that includes multiple T-shirt style plastic bags. The bag pack may be manufactured by folding a 4-layered structure into an 8-layered structure, welding a bottom edge, and then unfolding the 8-layered structure before stacking 4-layered bags into a bag pack.

Description

BACKGROUND[0001]1. Field of the Invention[0002]The invention relates generally to plastic bags, and more particularly, but without limitation, to a pack of polyethylene T-shirt style bags having relatively thin walls.[0003]2. Description of the Related Art[0004]Plastic bags are used in a variety of applications, including bagging groceries and / or other items at a retail point of sale. A common plastic bag for such applications has a pair of carrying handles that extend from the top of the bag body on opposite sides of the bag opening. Such bags are often referred to as T-shirt or vest bags because the handles loosely resemble the short sleeves of a T-shirt or shoulder straps of a vest. T-shirt bags are typically manufactured and distributed in bag packs that are configured to cooperate with a standard retailer dispensing rack.[0005]Plastic bags can be a significant overhead cost for a retailer. It would therefore be desirable to decrease the manufacturing cost of such bags. One way ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B65D30/00
CPCB65D33/001B65D33/065B31B2160/10B31B2155/00B31B70/982B31B2155/0012B31B2155/003B31B2160/106B31B2170/10
Inventor BAILEY, ROBERT D.WILKERSON, JACK RANDALTAN, TIEN TJIU
Owner IPS INDS