Claims
- 1. A thermoplastic bag structure having front and rear walls, a pair of spaced upwardly extending handle members formed integrally with said front and rear walls, an open mouth portion between said handles, and a plurality of upwardly extending pleats formed in said front and rear walls, said pleats being located at least transverse the lower inner portion of each of said handle members and said mouth portions immediately adjacent said lower inner portions of said handle members.
- 2. A thermoplastic bag structure in accordance with claim 1, wherein said bag is fabricated from a polyolefin thermoplastic.
- 3. A thermoplastic bag structure in accordance with claim 2, wherein said polyolefin is selected from the group consisting of polyethylene, polypropylene, polybutene and copolymers and blends thereof.
- 4. A thermoplastic bag structure in accordance with claim 2, wherein said polyolefin is high density polyethylene having a film density in the range of from about 0.935 up to about 0.965.
- 5. A thermoplastic bag structure in accordance with claim 1, wherein said pleats extend transverse said mouth portion.
- 6. A thermoplastic bag structure in accordance with claim 1, wherein said pleats extend downwardly from said mouth portion a distance in the range of about 0.5 inch to about 1.0 inch.
- 7. In a thermoplastic bag structure comprising uniform front and rear bag walls and an open mouth top portion, wherein the open mouth portion is characterized by having a pair of integrally formed carrying handles which are located on opposite ends of the mouth portion, and wherein the mouth portion and handles are formed by a U-shaped cut-out; the improvement which comprises:
- a plurality of pleats formed in the front and rear walls adjacent the bag mouth and a lower inner portion of the carrying handles, permitting lateral expansion which avoids edge stress concentration in the area of the pleats and thereby decreasing tear propagation.
- 8. A thermoplastic bag structure according to claim 7, wherein said pleats are vertically aligned with the bag mouth.
- 9. A thermoplastic bag structure according to claim 7, wherein said pleats extend transverse to the mouth portion.
- 10. A thermoplastic bag structure according to claim 7, wherein the thermoplastic comprises polyolefin.
- 11. A thermoplastic bag structure according to claim 7, wherein said thermoplastic comprises high density polyethylene.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of U.S. Patent Application Ser. No. 020,899, filed Mar. 15, 1979 now abandoned.
US Referenced Citations (5)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
20899 |
Mar 1979 |
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