Patent · US Expired

Thermal realtime clock

US5317367A · kind A · utility

8Cited by
14References
8Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJan 11, 1993
Grant dateMay 31, 1994
Priority date—
Expiry dateJan 11, 2013

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG03G15/80
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

A reprographic machine having a plurality of operating subsystems employs a setup procedure that prevents use for copying until all subsystems reach operating conditions. To avoid the need for time lost in the setup procedure where a power shut down is short, a bypass system, which senses the duration of the shut down, is utilized to allow prompt return to the copy function. Heated elements, such as fuser rolls, motors, and the like can be utilized to provide a timing function, based on temperature decay characteristics relative to time. The sensed temperature can be used as a control parameter for allowing bypass of the setup procedures.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.