发明授权
- 专利标题： Projection copying apparatus and projection screen therefor
- 专利标题（中）： 投影复印机及其投影屏幕
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申请号： US473615申请日： 1990-02-01
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公开(公告)号： US5003343A公开(公告)日： 1991-03-26
- 发明人: Hubert Hackenberg , Traugott Liermann , Franz Nadler , Herbert Plaschke , Hans J. Schrecke
- 申请人： Hubert Hackenberg , Traugott Liermann , Franz Nadler , Herbert Plaschke , Hans J. Schrecke
- 申请人地址： DEX Leverkusen
- 专利权人： AGFA-Gevaert AG
- 当前专利权人： AGFA-Gevaert AG
- 当前专利权人地址： DEX Leverkusen
- 优先权： DEX3903101 19890202
- 主分类号： G03B21/11
- IPC分类号： G03B21/11 ; G03B21/62
摘要：
A projection copying apparatus for reproducing microfilmed originals on a light-tightly disposable projection screen and for producing copies of microfilmed originals comprises means for copying of dot originals operating for complete or sectional copying of the originals, and a projection screen including a diffusing disc, an LCD dics arranged on the diffusing disc, the LCD disc being switchable between two conditions so that in one of the conditions it is transparent for observation of the originals and in the other of the conditions it is opaque for copying or searching.
公开/授权文献
- US4538665A Molding box apparatus 公开/授权日：1985-09-03