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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0884397 (1978-03-08) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 17 인용 특허 : 5 |
In the production of closed head drums, integral L-shaped roller chimes are formed outwardly from the side walls of the drums. In producing the drums, a thermoplastic parison or tubular member is placed within a mold and is shaped by blowing it outwardly against the mold surfaces. In the blowing ope
The method of manufacturing a closed hollow member such as a closed head drum, from a thermoplastic material having spaced end walls and a side wall extending between the end walls, comprising the steps of: (a) forming a tubular section of thermoplastic material; (b) closing the ends of the tubular
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