Printer
US10919315B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 11, 2019 |
| Grant date | Feb 16, 2021 |
| Priority date | — |
| Expiry date | Sep 11, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J33/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A printer includes a thermal print head, a supply shaft, a winding shaft, a light emitting device, and a photodetector. The light emitting device and the photodetector are aligned along a line parallel to a line passing through rotational axes of the supply and winding shafts at a predetermined distance. The predetermined distance is greater than a radius of the supply shaft and a radius of the winding shaft. The predetermined distance is less than a radial distance from the rotational axis of the supply shaft to an outer surface of the ink ribbon on the supply shaft and a radial distance from the rotational axis of the winding shaft to an outer surface of the ink ribbon on the winding shaft when a length of the ribbon on the supply shaft is equal to a length of the ribbon on the winding shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.