Sheet remainder detecting device and image forming apparatus
US7643762B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 2006 |
| Grant date | Jan 5, 2010 |
| Priority date | — |
| Expiry date | Jul 3, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00729
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A sheet remainder detecting device for detecting the remaining amount of sheets in a sheet stack is provided with a displacing member displaceable according to the thickness of the sheet stack; a first and a second optical sensors each having a light emitting element for emitting light toward the displacing member and a light receiving element for receiving the light emitted by the light emitting element and reflected by the displacing member; and a controller for discriminating the remaining amount of the sheets based on detection signals of the first and second optical sensors. The displacing member includes a light irradiation region to be irradiated with the lights from the light emitting elements and movable according to an amount of displacement of the displacing member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.