Unidirectional ribbon drive mechanism
US4850725A · kind A · utility
11Cited by
12References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1988 |
| Grant date | Jul 25, 1989 |
| Priority date | — |
| Expiry date | Jun 15, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19367
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A ribbon is driven past the printing station of a printer only when the print head is moved in the right-to-left direction across the printer. An endless timing belt causes rotation of a gear pulley that is in mesh with an idler gear. The idler gear is supported on a pair of projecting fingers of a plate that is swingable on the center of the gear pulley. The idler gear is responsive to the direction of rotation of the gear pulley through a drag effect of the projecting fingers with the bottom surface of the idler gear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.