Ink ribbon cartridge having one undetachable spool and idle rotation preventing structure
US6257780A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 1999 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Jan 6, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J17/32
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An ink ribbon is formed form a belt shaped sheet body, and is wound around a pair of tubes. Spools are detachably mounted at each end of the tube bodies. An ink ribbon cartridge includes side plates formed with supporting openings for supporting corresponding spools. Each supporting opening is formed with a cutout portion defined by edges. When the ink ribbon cartridge is mounted in a facsimile machine, the spools are freely rotatable within the supporting openings. On the other hand, when the ink ribbon cartridge is dismounted from the facsimile machine, engagement protrusions formed to the spools catch on the edges defining the cutout portions, thereby preventing the spools form rotating. As a result, the ink ribbon will not unintentionally greatly loosen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.