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Browse Prior Art Database

ELECTROLUMINESCENT LAMP FOR PRECHARGE DISCHARGE

IP.com Disclosure Number: IPCOM000025259D
Original Publication Date: 1984-Apr-30
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 62K

Publishing Venue

Xerox Disclosure Journal

Abstract

In automatic electrostatographic reproducing apparatus, it is not uncommon to use a corona generating device to neutralize charge or otherwise level the charge on the photoreceptor prior to its being uniformly charged at the first step of the subsequent imaging cycle. This enables the level of charge on the photoreceptor to be more uniform and provide better copies. This precharge corona generating device however also generates ozone sometimes to such a degree that it is difficult to subsequently place a uniform charge on the photoconductor during charging. This results in dark dusting potential variations and non-uniform imaging. The Figure illustrates an alternative to the use of a corona generating device for this precharge discharge function in that it substitutes an electroluminescent lamp for the precharge corona generator. In the Figure a cylindrical rotatably mounted electrostatographic imaging drum 10 is shown with a curved electroluminescent lamp 12 acting as a discharge device between the cleaner housing 14 and the charge corotron 16. The curved nature of the electroluminescent lamp provides greater surface area and therefore, a greater amount of light energy to discharge the photoreceptor.

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XEROX DISCLOSURE JOURNAL

ELECTROLUMINESCENT LAMP FOR PRECHARGE DISCHARGE
Daniel J. J. Velasco

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Proposed Classification
U.S. CI. 355/3CH Int. C1. C03g 15/00

In automatic electrostatographic reproducing apparatus, it is not uncommon to use a corona generating device to neutralize charge or otherwise level the charge on the photoreceptor prior to its being uniformly charged at the first step of the subsequent imaging cycle. This enables the level of charge on the photoreceptor to be more uniform and provide better copies. This precharge corona generating device however also generates ozone sometimes to such a degree that it is difficult to subsequently place a uniform charge on the photoconductor during charging. This results in dark dusting potential variations and non-uniform imaging. The Figure illustrates an alternative to the use of a corona generating device for this precharge discharge function in that it substitutes an electroluminescent lamp for the precharge corona generator. In the Figure a cylindrical rotatably mounted electrostatographic imaging drum 10 is shown with a curved electroluminescent lamp 12 acting as a discharge device between the cleaner housing 14 and the charge corotron 16. The curved nature of the electroluminescent lamp provides greater surface area and therefore, a greater amount of light energy to discharge the photoreceptor.

Volume 9 Number 2 March/April 1984 139

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