System for controlling curls of a paper
US4926358A · kind A · utility
38Cited by
25References
62Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 20, 1988 |
| Grant date | May 15, 1990 |
| Priority date | — |
| Expiry date | May 20, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00827
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A curl control system applicable to an electrophotographic copier for sensing the conditions of curls of a paper being transported and correcting the curls includes a curl sensing device and a curl correcting device. Two distance sensor units illuminate the paper and receive a reflection from the paper to sense the amount and direction of curl of the paper. A paper size sensor is provided for sensing the size of the paper. The curl correcting device corrects the curls on the basis of the amount and direction of curl sensed. The curl correcting device may be implemented in the device in many fashions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.