Character by character thermal recording device with ink sheet feed control
US5533819A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1995 |
| Grant date | Jul 9, 1996 |
| Priority date | — |
| Expiry date | Feb 16, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J33/36
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A thermal recording device suitable for use in an electronic typewriter for printing characters on a printing paper by means of an ink sheet. The device has a thermal recording head adapted to be pressed onto the printing paper through the ink sheet so as to print the characters on the printing paper. The ink sheet is adapted to be fed by a reversible winding device. The recording device further has a first detector for detecting the length of the ink sheet fed by the feeding device in a period between a moment at which the feeding is commenced and a moment at which the thermal recording head reaches the first image recording position, and a second detector for detecting the length of the ink sheet fed by the feeding device in a period between a moment at which the thermal recording head leaves the final image recording position and a moment at which the thermal recording head is stopped. The feeding device is controlled in such a manner as to reverse the ink sheet in an amount corresponding to the lengths of feed of the ink sheet detected by the first and second detectors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.