Sheet supplying device and image forming apparatus
US7457580B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 21, 2005 |
| Grant date | Nov 25, 2008 |
| Priority date | — |
| Expiry date | Dec 7, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00396
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Printing sheets (4) are placed on a sheet placing plate (103). A pickup roller (6) contacts a surface of the uppermost printing sheet (4) placed on the sheet placing plate (103) and feeds the printing sheet (4) out of the sheet placing plate (103). A spring (109) resiliently urges the sheet placing plate (103) toward the pickup roller (6). A ratchet (108) moves in accordance with the movement of the sheet placing plate (103). The printing sheets (4) on the sheet placing plate (103) urges the pickup roller (6) upward so that a pickup frame (115) moves upward to a position detected by a position detecting sensor (65). In accordance with the detection signal from the position detecting sensor (65), a solenoid (71) moves a lock lever (110) so that the lock lever (110) engages the ratchet (108) to thereby restrict the movement of the sheet placing plate (103).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.