发明授权
- 专利标题： Method of manufacturing a master intended for the manufacture of projection screens and tool for carrying out the method
- 专利标题（中）： 制造用于制造投影屏幕的主机的方法和用于执行该方法的工具
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申请号： US371680申请日： 1989-06-22
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公开(公告)号： US4955937A公开(公告)日： 1990-09-11
- 发明人: Marinus J. J. Dona , Johannes M. M. Swinkels
- 申请人： Marinus J. J. Dona , Johannes M. M. Swinkels
- 申请人地址： NY New York
- 专利权人： U.S. Philips Corporation
- 当前专利权人： U.S. Philips Corporation
- 当前专利权人地址： NY New York
- 优先权： NLX8702384 19871007
- 主分类号： G03B21/62
- IPC分类号： G03B21/62
摘要：
A method of manufacturing a master for projection screens, according to which a pattern of parallel rectilinear grooves (31) and ribs (31) is formed on one side of a plate of machinable material by a slotting operation performed by means of a profile chisel. The grooves (33) are formed in several different tooling steps with, several grooves being tooled simultaneously. The profile chisel is of multiple construction and is composed of three subchisels, i.e. a precutting chisel, a cutting chisel (13) and a finishing chisel.
公开/授权文献
- US6020540A Gene encoding endochitinase 公开/授权日：2000-02-01
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