Bags with reinforced bag walls

Abstract

Improved merchandise bag with reinforced bag wall is formed of thinner than normal extruded film with a thickened center section. For merchandise bags, the thickened center section provides a stronger bag bottom and a stronger area for the formation of bag handles. Handle bags include soft loop, round die cut oval die cut, wave top, patch and rigid handles. For T-shirt style bags, the thinner plastic in the gusset and handle areas is made up for by multiple layers of film in these regions. T-shirt bags may have single, triple or folded gussets providing as many as eight layers of film in these regions. The thickened center section will substantially match the thickness of the gusseted areas and provide for a more easily stacked bag. The bags are formed of mono layer or multi-layer film and at least a portion of the bag walls is corona treated to improve adhesion.

Description

FIELD OF INVENTION[0001]This invention relates to the field of merchandise bags formed from thermoplastic and plastic substitute materials and more specifically to bags designed to provide optimal strength and carrying capacity while using a reduced amounts of such materials.BACKGROUND OF THE INVENTION[0002]Film merchandise bags are manufactured from petroleum products and various organic material substitutes, all of which are increasingly expensive resources. It is difficult to produce such bags in formulations that are easily biodegradable. As the quantity of merchandise used daily is enormous, the production and disposal of these bags has a significant effect on the environment. For these reasons, it is desirable to produce merchandise bags that use a minimum of thermoplastic or plastic-substitute material. Some of the materials presently in use or contemplated for merchandise bags include high density polyethylene, medium density polyethylene, low density polyethylene, linear lo...

AI Technical Summary

Benefits of technology

[0042](31) In still another variant, the open mouth portion includes stress relief areas. The stress relief areas have curved inner corners wherein a cut line forming the corners extends from a vertical inner edge of the bag handle outwardly toward one of the first and second side edges, downwardly toward the lower seam and upwardly at a shallow angle toward a center line of the front and rear bag walls, thereby reducing the likelihood that the open mouth portion may tear under tension.

Problems solved by technology

Film merchandise bags are manufactured from petroleum products and various organic material substitutes, all of which are increasingly expensive resources.

It is difficult to produce such bags in formulations that are easily biodegradable.

As the quantity of merchandise used daily is enormous, the production and disposal of these bags has a significant effect on the environment.

Use of thinner film in bag construction can result in torn or burst bags, a situation that is not acceptable to retail stores and their customers.

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