Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co LtdfiledCriticalRicoh Co Ltd
Priority to JP50143424ApriorityCriticalpatent/JPS5268410A/en
Publication of JPS5268410ApublicationCriticalpatent/JPS5268410A/en
Exposure Or Original Feeding In Electrophotography
(AREA)
Light Sources And Details Of Projection-Printing Devices
(AREA)
Facsimile Scanning Arrangements
(AREA)
Abstract
PURPOSE:To prevent the non-uniform density of a fluorescent lamp tube for exposure which takes place at the time of controlling an electric power thereto by detecting the temperature of the tube wall of the fluorescent lamp so as to control an amt. of blowing, and maintaining the temperature of the tube wall which exhibits the max. light emission efficiency o f the fluorescent lamp.