Invertible inked ribbon cartridge having two sets of feed mechanisms for an impact-serial printer
US4544291A · kind A · utility
12Cited by
14References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 13, 1981 |
| Grant date | Oct 1, 1985 |
| Priority date | — |
| Expiry date | Mar 13, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J33/54
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An inked ribbon cartridge has two sets of ribbon feed mechanisms, one for each core means around which the ribbon is wound, allowing the ribbon to travel back and forth so that the cartridge can be loaded upside down when the upper half of the ribbon has been used up thereby doubling the useful life of the cartridge. Two springs apply a predetermined force to two ratchet wheels which are connected to first and second core means for preventing an over-rotation of the core means. Each feed mechanism comprises a feed driven roller and a feed drive roller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.