Sheet feeder
US6354586B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 1, 2000 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | Sep 1, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2801/21
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
After the uppermost sheet is separated from a stack of sheets on a pressure plate by a sheet feed roller, a push plate is lowered by a lowering mechanism by a predetermined distance and is halted at a plate standby position higher than the plate lower position by the engagement of a ratchet pawl with a lock pawl. Accordingly, when the pressure plate is lowered after the sheet is separated, it is unnecessary to lower the push plate to the plate lower position. Thus, the moving up/down distance of the pressure plate is shortened when the sheet is separated and conveyed, resulting in a reduction in impact noise generated upon the contact of the sheet and the sheet feed roller. In addition, because the moving distance is shortened, the sheet feed speed per sheet is increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.