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Browse Prior Art Database

Copier Diffuser

IP.com Disclosure Number: IPCOM000052197D
Original Publication Date: 1981-May-01
Included in the Prior Art Database: 2005-Feb-11

Publishing Venue

IBM

Related People

Authors:
Louis, HP Seifert, HG [+details]

Abstract

During copying on office copiers with good grey tone reproduction, such as IBM Copier III, the reproduction of high gloss or metallic, reflecting masters shows grey clouds in the background of the image. These clouds, resulting from localized overexposure or underexposure caused by the gloss of the master and the positioning of the light source, are eliminated by special diffusers 1 which are placed on glass plate 2 of the copier.