Projection unit for a light permeable original in a copying machine
US5003344A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1990 |
| Grant date | Mar 26, 1991 |
| Priority date | — |
| Expiry date | Apr 9, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2227/325
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A projection unit, which is mounted in a copying machine and used to project an image of a light permeable original onto a prescribed exposure point on a photosensitive material, comprising a light source for exposure in a box, an original holding means which holds the original in a prescribed position with respect to the light source and the photosensitive material and is disposed movably in the box so that the image of the original is scanned in a prescribed direction with respect to the photosensitive material, a driving means for moving the original holding means in the scanning direction, a transmission means provided between the original holding means and the driving means which is capable of moving between an engaged position in that the transmission means is coupled to the original holding means and driving means so as to transmit power of the driving means to the holding means and a disengaged position in that the transmission means is not coupled to the original holding means and the driving means, and a switching means for putting the transmission means into the engaged position or disengaged position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.