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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0220888 (1980-12-29) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 16 인용 특허 : 1 |
A thermoplastic bag characterized by having handles formed on opposite ends of the bag mouth which is characterized by having structural features immediately adjacent the mouth of the bag to provide stress relief at those positions on the bag mouth where maximum stress is concentrated when such bags
In a method of making a thermoplastic bag, the steps comprising: (a) forming a thermoplastic tube having an opening at each end thereof, and front and rear walls; (b) sealing said openings; (c) forming a plurality of pleats in said front and rear walls, said pleats extending toward each of said seal
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