Paper clamp device for a printer
US4444522A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1982 |
| Grant date | Apr 24, 1984 |
| Priority date | — |
| Expiry date | Jun 22, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J15/16
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A clamping device for a printer has a plurality of sideways-slippage preventing rollers housed in a roller housing which is fixed to a rear face of a wall of a ribbon shield. These preventing rollers prevent the printing paper from slipping sideways during a printing operation. A plurality of pressing plates are fixed on a hammer cover and biased towards the preventing roller by springs. A printing paper travels between the preventing rollers and the pressing plates, and the preventing rollers are oriented to rotate in the direction in which the printing paper travels. Since the preventing rollers prevent the printing paper from slipping sideways during printing, the printing lines are aligned properly. The preventing rollers also exert a minimum forward clamping force on the printing paper, which thus prevents the paper from tearing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.