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Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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Publication date
Application filed by Ricoh Co LtdfiledCriticalRicoh Co Ltd
Priority to JP50152113ApriorityCriticalpatent/JPS6025789B2/en
Publication of JPS5275439ApublicationCriticalpatent/JPS5275439A/en
Publication of JPS6025789B2publicationCriticalpatent/JPS6025789B2/en
PURPOSE: To actuate a variable timer in a liquid developing type copier, produce a signal in proportion to main switch off time or a signal in proportion to copying waiting time, and clean the light sensitive material according to this siglnal.