发明名称 |
Magnetic tape cassette, cassette half and molding method therefor |
摘要 |
The cassette half molding method molds one of upper and lower halves of the magnetic tape cassette by injection molding with an injection mold in which a gas vent pin for smoothing a flow of molten resin to be introduced in the cavity for molding a transparent or semitransparent window portion provided in the upper half. The cassette half is molded by this molding method. The magnetic tape cassette has a friction sheet interposed either between a pair of take-up hubs and the upper half, or between the pair of take-up hubs and the lower half, or both, and the friction sheet is made of polyethylene-based resin and has a surface electric resistance value in the range of 1x107 OMEGA to 1x1010 OMEGA. The magnetic tape cassette has a rib for reducing a resistance when the roller of the detecting member passes through which is provided at a position corresponding to a recess and on a side of the front lid in the top surface of the body case.
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申请公布号 |
US2002175237(A1) |
申请公布日期 |
2002.11.28 |
申请号 |
US20020194054 |
申请日期 |
2002.07.15 |
申请人 |
FUJI PHOTO FILM CO., LTD. |
发明人 |
ONMORI SHOZO;HIRAGUCHI KAZUO |
分类号 |
B29C45/00;B29C45/16;B29C45/34;G11B23/087;(IPC1-7):G11B23/087;G11B23/113 |
主分类号 |
B29C45/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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