Method of making packaging materials |
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| 申请号 | US42985354 | 申请日 | 1954-05-14 | 公开(公告)号 | US2805973A | 公开(公告)日 | 1957-09-10 |
| 申请人 | CENTRAL STATES PAPER & BAG CO; | 发明人 | KLASING ARTHUR P; RICE WILLIAM J; | ||||
| 摘要 | |||||||
| 权利要求 | 1. THE METHOD OF MAKING A FALT CONTAINER WHICH COMPRISES UNWINDING TWO WEBS OF THERMOPLASTIC FILM WHICH ARE CAPABLE OF FUSING TOGETHER UNDER HEAT, PASSING SAID WEBS IN MARGINALLY REGISTERING SUPERPOSED RELATION OVER A ROLLER, APPLYING HEATED KNIFE EDGES TO THE MARGINS OF SAID WEBS AS SAID MARGINS PASS OVER SAID ROLLER TO THEREBY SEAL THEM TOGETHER IN A NARROW MARGINAL SEAM, AND APPLYING A HEATED KNIFE EDGE TO THE WEB AT A PORTION |
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| 说明书全文 | |||||||
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