Browse Prior Art Database

COOLING SLOT OCCLUDER Disclosure Number: IPCOM000025336D
Original Publication Date: 1984-Oct-31
Included in the Prior Art Database: 2004-Apr-04

Publishing Venue

Xerox Disclosure Journal


In an electrophotographic printing machine, the exposure station employs a housing defining a cavity having the exposure lamps and lens positioned therein. Heat is generated during the exposure process which must be dissipated. In order to dissipate the heat, cooling slots are provided to admit cooling air into the cavity. Under certain circumstances, the cooling slot is imaged by surface reflections from the platen upon which the original document is positioned. When copying light original documents, the image of the cooling slots appears as a blemish on the copy sheet. An occluder or blocker is positioned so as to preclude imaging of the slot or reflection thereof.