Drive mechanism including floating pressure ring for ink ribbon cassette
US4732500A · kind A · utility
4Cited by
15References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 29, 1985 |
| Grant date | Mar 22, 1988 |
| Priority date | — |
| Expiry date | Oct 29, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J32/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An improved drive mechanism for an ink ribbon cassette for advancing an ink ribbon particularly well suited for use in a typewriter is provided. The drive mechanism includes a drive roller rotatably supported in the casing with a free floating pressure ring supported by a roller. The pressure ring is supported against the roller and against the drive roller so that there is an increase in pressure with an increase in the tension of the ribbon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.