发明名称 |
Device and product of pressing two mold portions together and controlling an internal pressure so as to create a hollow cone |
摘要 |
A method and device for the manufacture of a hollow cone (37) with a cone tip (31) whereby a parison of viscous material (35) is molded into the shape of the hollow cone. An escape space (11) becomes accessible to the material in the vicinity of a cone tip to be formed. The moment the pressure present in the material in the vicinity of the cone tip to be formed exceeds a previously defined value. Breaking-off of the cone tip during or after molding is prevented by this. The hollow cone is suitable inter alia for use in a cathode ray tube.
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申请公布号 |
US2001013231(A1) |
申请公布日期 |
2001.08.16 |
申请号 |
US20010757877 |
申请日期 |
2001.01.10 |
申请人 |
U.S. PHILIPS CORPORATION |
发明人 |
SELTEN WILHELMUS N.M.;VAN ROOSMALEN MARTINUS P.W.;TUIN HERMANUS N. |
分类号 |
H01J9/24;C03B9/193;C03B9/33;C03B11/06;C03B11/10;C03B11/12;C03B23/217;H01J9/38;(IPC1-7):C03B40/04 |
主分类号 |
H01J9/24 |
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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