Ribbon feeder for a printer having a tension mechanism
US5284396A · kind A · utility
34Cited by
1References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 27, 1992 |
| Grant date | Feb 8, 1994 |
| Priority date | — |
| Expiry date | Jul 27, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J33/52
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An object of the present invention is to provide a ribbon feeder to prevent a ribbon from slackening when a sheet is back-fed in a thermal printer. When a ribbon is fed from a ribbon feed roller, resistance is imparted to the rotation of the ribbon feed roller by a first spring. Further, resilient force is stored in a second spring by tension produced when the ribbon is fed from the ribbon feed roller. The ribbon tends to slacken when the sheet is back-fed, such slackening ribbon is rewound by reversely rotating the ribbon feed roller by the stored resilient force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.