Disposable ribbon cartridge for shorthand machines
US6736558B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2002 |
| Grant date | May 18, 2004 |
| Priority date | — |
| Expiry date | Mar 29, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J33/14
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A disposable ink ribbon cartridge for use in a shorthand machine. The cartridge includes an endless loop ribbon threaded through an advancing mechanism in contact with a movable ink reservoir. The advancing mechanism advances the ribbon and also transfers ink from the ink reservoir to the ribbon. The ink reservoir is made from a reticulated foam which provides an even supply of ink over a long period of time. The movable ink reservoir and the advancing mechanism interact to minimize friction between the moving parts of the cartridge. The ink reservoir and advancing mechanism deliver consistent and even doses of ink to the ribbon throughout the life of the cartridge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.