Automatic velocity and position controller for a film processor
US4385821A · kind A · utility
4Cited by
10References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 3, 1980 |
| Grant date | May 31, 1983 |
| Priority date | — |
| Expiry date | Apr 3, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03D3/132
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An automatic controller for a film processor is characterized by a motor energy signal generator which is responsive to both a position error signal and to a velocity error signal. The motor energy signal is periodically applied to a drive motor for the processor to modify the portion of the available energy transmitted from a source to the motor to restore the actual film position to within a predetermined range of an ideal film position and to restore the actual velocity of the film to within a predetermined range of an ideal film velocity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.