Sheet feeding mechanism for printing apparatus
US5141344A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 1991 |
| Grant date | Aug 25, 1992 |
| Priority date | — |
| Expiry date | Aug 12, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2511/224
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A sheet feeding mechanism for a printing apparatus capable of achieving accurate sheet feed performance free from slanted sheet feeding, dislocation between pages in printing on copy sheets, out-of-pitch printing, and the like. The sheet feeding mechanism includes a pair of confronting roller units capable not only of applying a driving-like sheet feed force to both front and back surfaces of a copy sheet, but also of maintaining a constant pressure contact force from each roller. The shafts of the pair of confronting roller units are driven so that the sheet feed force is stable. The pressure contact force is produced by a structure wherein each roller is biased by independent loading.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.