Ribbon drive for a thermal demand printer
US5995128A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1999 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Mar 31, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65C2210/0029
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A novel demand printer is used for printing on tickets, tags, pressure sensitive labels and other media. The printer has a spring wrap clutch assembly operatively associated with a media delivery structure for use with a rotating shaft to maintain a constant tension on a ribbon. The spring wrap clutch assembly includes a coiled spring having a leg extending away from one end of the coil, a collar having a bore therein for receiving the coiled spring with the leg extending away from the collar, the rotating shaft extending through the coiled spring and the collar is attachable to the rotating shaft, and a plurality of ramped teeth positioned around the rotating shaft. Each of the ramped teeth has a sloped surface and the leg of the coiled spring controllably engages the ramped teeth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.