| 发明名称 |
METHOD AND DEVICE FOR MANUFACTURING HOLLOW CONE, CONE, AND CRT |
| 摘要 |
PURPOSE: A method and a device for manufacturing a hollow cone are provided to prevent the breakage of a cone tip during or after molding. CONSTITUTION: A hollow cone is provided with a cone tip(31) whereby a parison of viscous material 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 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.
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| 申请公布号 |
KR100307861(B1) |
申请公布日期 |
2001.08.24 |
| 申请号 |
KR19930014650 |
申请日期 |
1993.07.30 |
| 申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
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):H01J9/38 |
主分类号 |
H01J9/24 |
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