发明名称 |
Injection molding instrument for forming resin concave lenses |
摘要 |
Apparatus for forming a concave lens of resin material and adapted to be used, for example, in spectacles, video projection devices, etc., whereby raw material is fed into substantially the center thinner portion of the mold first and then radially outwardly until the material reaches the periphery, thereby to eliminate weld lines in the produced lenses.
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申请公布号 |
US4560342(A) |
申请公布日期 |
1985.12.24 |
申请号 |
US19840583610 |
申请日期 |
1984.02.27 |
申请人 |
ISHIDA, TAKESHI;ISHIDA, YOSHIHIRO |
发明人 |
ISHIDA, TAKESHI;ISHIDA, YOSHIHIRO |
分类号 |
B29C45/00;B29C45/46;(IPC1-7):B29C45/28;B29D11/00 |
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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