Thermal printer and ink ribbon used therewith
US5853255A · kind A · utility
21Cited by
1References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1997 |
| Grant date | Dec 29, 1998 |
| Priority date | — |
| Expiry date | Jan 21, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J17/36
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A gradation correction data used in correcting the gradation of the printed image is recorded on the leader film of the ink ribbon in a form of optically readable marks. Then the ink ribbon is set in a thermal printer, the marks are read out by an optical sensor to obtain the gradation correction data. Then, the gradation correction of the image data to be printed is carried out by referring to the correction data thus obtained prior to the actual printing of the image data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.