Heater control for rotary members
US4114023A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1976 |
| Grant date | Sep 12, 1978 |
| Priority date | — |
| Expiry date | Oct 22, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/24
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A heater roll in which a resistor-type heater mounted in the roll is controlled by use of a temperature sensing element also located in the roll. Electrical power, particularly AC power, is provided through slip rings and the set point for the temperature control is determined by a signal from a current source applied through the slip rings. The set point transmitter is designed to provide a constant current signal to the temperature regulator, irrespective of resistance variations which may be introduced by changes in the slip ring characteristics. As such, the temperature regulator maintains a predetermined temperature in the rotating roll, irrespective of slip-ring resistance variations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.