发明名称 Spool core for a strip-shaped perforated material, in particular a film
摘要 A spool core possesses a resilient lever (4, 7) which extends within the circumference of the spool core, approximately parallel thereto, and which has a hook (8) in which a perforation of the film (12) can be clasped, the lever (4, 7), when a film tension (13) occurs, being pulled against a part (9), having a clamping surface (10), of the spool core circumference and firmly clamping the film between itself (11) and the clamping surface (10) in order to prevent tearing open of the perforation. <IMAGE>
申请公布号 CH623015(A5) 申请公布日期 1981.05.15
申请号 CH19770015831 申请日期 1977.12.22
申请人 BOLEX INTERNATIONAL SA 发明人 RUDOLF BOEGLI
分类号 B65H75/28;G03B21/32;(IPC1-7):B65H75/28;G03B1/00 主分类号 B65H75/28
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