Color thermal printer and color thermal printing method
US6922205B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 5, 2003 |
| Grant date | Jul 26, 2005 |
| Priority date | — |
| Expiry date | Jun 26, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J15/16
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The printer has a conveyor roller pair and three thermal heads to record yellow, magenta and cyan images onto a recording sheet. The conveyor roller pair receives forward tension Ff from the forward tension roller pairs located near the thermal heads to pull the recording sheet with tension. A backward tension roller pair is provided to generate backward tension Fb to cancel forward tension Ff so that the recording sheet is conveyed at a stable conveyance speed. The coefficient of friction between the thermal head and the recording sheet is varied depending on the temperature, humidity and so force. Backward tension Fb is equal to Ef·α in consideration of the correction value α to correct variation in the coefficient of friction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.