Thermal printing apparatus
US4536775A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1983 |
| Grant date | Aug 20, 1985 |
| Priority date | — |
| Expiry date | Dec 14, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J7/36
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Thermal printing apparatus includes a magnetic core having a gap, an electromagnetic coil mounted on the core for generating an electromagnetic field in the core and through the gap, a rotatably mounted cylindrical thermal print head having type characters on its periphery and located partially within the gap in the magnetic core, and a mechanism for rotating the print head to locate a selected type character in printing position in cooperative relation to a pressure element. The magnetic field generates circulating currents in the print head for heating it to a temperature necessary for causing heat-sensitive ink to be transferred from a ribbon to a record medium, both of which are positioned between the print head and the pressure element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.