Sheet detection apparatus with reflecting member
US4983854A · kind A · utility
35Cited by
11References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1989 |
| Grant date | Jan 8, 1991 |
| Priority date | — |
| Expiry date | Sep 8, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J29/48
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A sheet detection apparatus is provided which determines the presence or absence of a sheet on a sheet feed path as well as the type of sheet. The apparatus utilizes a light source to direct a predetermined amount of light to a sensor by reflecting off a sheet on the feed path or a reflector in the absence of any such sheet on the path. The presence or absence of the sheet is determined by comparing the output value of the sensor with predetermined reference values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.