Leistungsversorgung zur zeitlichen Stromversorgung nach dem Sperren

This invention relates to an improved laser printer power supply that maintains 24-, 12-, and 5-volt DC power to run exhaust fans (14) for a brief period after the power switch (S1) is turned off. These fans (14) remove undesirable ozone from the photo-conducting print drum so as to extend the life...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	HIRST, B. MARK
Format:	Patent
Sprache:	ger
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS BASIC ELECTRONIC CIRCUITRY CINEMATOGRAPHY CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONTROL OR REGULATION THEREOF CONTROLLING CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY ELECTROGRAPHY ELECTROPHOTOGRAPHY GENERATION HOLOGRAPHY MAGNETOGRAPHY PHOTOGRAPHY PHYSICS PULSE TECHNIQUE REGULATING SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES SYSTEMS FOR STORING ELECTRIC ENERGY
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Beschreibung
Zusammenfassung:	This invention relates to an improved laser printer power supply that maintains 24-, 12-, and 5-volt DC power to run exhaust fans (14) for a brief period after the power switch (S1) is turned off. These fans (14) remove undesirable ozone from the photo-conducting print drum so as to extend the life of the photo-conductor. The circuits utilize a timer circuit and an optically isolated photo-diac (31,32) to turn a power triac (30) on and off.