Method and apparatus for monitoring and controlling heated fusers for copiers

Copier fuser roller temperature is monitored during the warm-up period by a series of decreasing temperature threshold levels. Each threshold level is monitored for a preselected time period and reduced for the next time period. The sampling continues until the fuser roller temperature sensed by a t...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: DODGE, JOHN H, ERNST, LARRY M
Format: Patent
Sprache:eng
Schlagworte:
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Copier fuser roller temperature is monitored during the warm-up period by a series of decreasing temperature threshold levels. Each threshold level is monitored for a preselected time period and reduced for the next time period. The sampling continues until the fuser roller temperature sensed by a thermistor or the like exceeds the threshold level. At that point, the control logic for the copier is enabled for normal copying since the fuser roller temperature profile is then approaching at an adequate level for proper fusing of copy sheets. Fuser over-temperature, under-temperature and failure conditions are determinable.