Ink sheet transfer control apparatus for giving a specified value of tension to ink sheet to implement stable transfer
US5751331A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1995 |
| Grant date | May 12, 1998 |
| Priority date | — |
| Expiry date | Jun 5, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J33/36
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention provides an ink sheet transfer control apparatus which can transfer an ink sheet stably without requiring any complex structure. A CPU drives and controls a grid motor so that recording paper can be transferred at a constant speed with the ink sheet and the recording paper pressed in contact with each other by a thermal head and a platen. Then, the CPU drives an ink motor with an arbitrarily determined voltage Vi, and measures a current Ig then flowing through the grid motor. The CPU determines such an optimum drive voltage Vir of the ink motor that a specified tension is developed to the ink sheet in printing operation, based on the measured current Ig, and drives the ink motor with the optimum drive voltage Vir. Characteristics of print drive system are detected by measuring the current Ig flowing through the grid motor, so that the print drive system can be controlled with simple construction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.