Optical system for copier
US4854672A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 11, 1988 |
| Grant date | Aug 8, 1989 |
| Priority date | — |
| Expiry date | Jan 11, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/041
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical system for a copier includes a lens and mirrors which are movable simultaneously such that an image of an original can be projected on a recording medium at a selected magnification. A cylindrical cam is rotated by a motor which also moves the lens and the cylindrical cam has a guide piece formed on its side surface such that a holder for the mirrors is driven by the rotation of the cam in such a way that the desired magnification is achieved. The holder has two rollers sandwiching the guide piece and compressed against its side surfaces by a spring such that the mirrors can be accurately moved in coordination with the motion of the lens according to the selected magnification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.