Platen controlled sheetfeed permitting back-up for erasure
US4940348A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1988 |
| Grant date | Jul 10, 1990 |
| Priority date | — |
| Expiry date | Sep 15, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J13/0045
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Sensor arm (5) detects paper (1) at the printing stations of a printer (13). The sensor arm is linked through shaft (37) to position ledge (43) where it encounters and extension (47) of spring clutch (31) to decouple the spring clutch. Sheetfeed (11) is both driven and controlled from the platen (3) of the printer. With the spring clutch deactivated by the presence of paper, pawl (39) continues to hold the sheetfeed in an inactive status. In the absence of paper, the sensor arm (5) moves past the printing region, moving the ledge (43) away from contact with the spring clutch. Backward movement of the platen then initiates a sheetfeed cycle by movement of gear (35) being transmitted through the spring clutch (31).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.