Roll paper terminal end detecting unit and method
US5758982A · kind A · utility
21Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1995 |
| Grant date | Jun 2, 1998 |
| Priority date | — |
| Expiry date | Oct 6, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2301/41524
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A recording/printing unit using roll paper, and method for easily and securely detecting the terminal end of roll paper rolled around a core inside a color printer. The outside face of said core is darker than the roll paper. A sensor is provided for detecting the intensity of reflected light. A pinch roller is provided turning in contact with the roll paper surface and a spring is provided for pressing the pinch roller against the surface of roll paper, and for detecting the terminal end of roll paper by the change in the intensity of reflected light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.