Image forming apparatus with image reading unit
US5287158A · kind A · utility
19Cited by
3References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1992 |
| Grant date | Feb 15, 1994 |
| Priority date | — |
| Expiry date | Dec 15, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00928
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes a printing unit for printing an image on a paper, a paper feed mechanism for feeding a paper to said printing unit, a paper supply cassette for forwarding papers, one by one, to said paper feed mechanism, an optical sensor for detecting whether or not a surface of each paper, fed to said printing unit by said paper feed mechanism, is blank, and an ejecting unit for ejecting a paper from said paper feed mechanism without printing an image thereon when said optical sensor detects that the surface of the paper is not blank, so that only papers having blank surfaces are fed to said printing unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.