Thermal recording apparatus for recording and erasing an image on and from a recording medium
US5424764A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 1993 |
| Grant date | Jun 13, 1995 |
| Priority date | — |
| Expiry date | Aug 24, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/365
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A printing system for recording and erasing a visible image on/from a recording medium being changed between transparent and non-transparent states depending on a heating temperature. A thermal recording device which includes a section for electrically energizing a heating element using a driving pulse train is used to head the recording medium, thereby changing its state. The first driving pulse train has a plurality of pulses of a first duty factor in one dot formation period for recording each non-transparent dot on the recording medium. A second driving pulse train for electrically energizing the heating elements has pulses of a second duty factor which are different from the first duty factor, the number of second pulses being substantially the same as that of the first driving pulse train in order to record the transparent dot on the recording medium or to erase the non-transparent dot from the recording medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.