Digital copier having switchable pixel densities
US4953036A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 16, 1989 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | Mar 16, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K15/1223
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital copier capable of switching the pixel density of an image to be printed out. A laser printer installed in a writing section of the copier is also usable for printing out image data fed from another machine which may be operatively connected to the copier. A switching device is provided for switching the pixel density of an image to be printed out over to one of a plurality of pixel densities which matches with the particular machine connected to the copier. The switching device selects either one of at least two lenses included in illuminating optics of the laser printer and each having a different focal length, or selectively moves a single lens of the illuminating optics to any of a plurality of stop positions which are defined on an optical axis of the optics, or selectively changes the illumination time of a laser beam of the laser printer, or selectively changes the rotation speed of a mirror motor adapted to drive a polygonal mirror of the laser printer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.