EINRICHTUNG FUER DIE TEMPERATURUEBERWACHUNG EINES DRUCKKOPFES ODER EINER HAMMERBANK DER ELEKTROMAGNETSPULENBAUART

The needle matrix printer has a head (20) that has a large number of needles (1) and activated by a separate electromagnetic stage (3). Each needle actuator receives a drive signal from a drive circuit (21). Coupled to the drive circuit is a temperature monitoring circuit that has a constant current...

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Bibliographic Details
Main Authors GRUENER, MANFRED, (GRAD.), 7900 ULM, DE, VOGELMANN, CHRISTIAN. , 7910 NEU-ULM, DE
Format Patent
LanguageGerman
Published 15.11.1990
Subjects
CORRECTION OF TYPOGRAPHICAL ERRORS
i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME
LINING MACHINES
PERFORMING OPERATIONS
PRINTING
SELECTIVE PRINTING MECHANISMS
STAMPS
TRANSPORTING
TYPEWRITERS
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Summary:The needle matrix printer has a head (20) that has a large number of needles (1) and activated by a separate electromagnetic stage (3). Each needle actuator receives a drive signal from a drive circuit (21). Coupled to the drive circuit is a temperature monitoring circuit that has a constant current source (25) switched in during a pause period to cause a voltage drop that can be compared with a reference (27). A high or low signal can be latched into a 'D' type stage (30) and if the temperature is two high a cooling fan can be emergised.
Bibliography:Application Number: DE19893914217