MULTI-FUNCTION SEAL FOR AN IMAGE MODULE
Original Publication Date: 1998-Apr-30
Included in the Prior Art Database: 2004-Apr-08
Xerox Disclosure Journal
Disclosed is an improved seal for Raster Input Scanner (RIS) devices which effectively seals out light and dirt particulates for the imaging module cavity and provides necessary positioning forces to secure, for example, a fiber-optic lens to the scanner housing. The seal comprises a single extruded part comprised of a dual durometer elastomer, that is a rigid outer plastic surface to provide shape and structure functions, and a compressible foam like interior surface to provide positioning and sealing functions. The seal blocks light and dirt from entering the image module cavity by forming a press fit seal that fills the gaps between the lens and the casting edge of the imaging module. The part applies lateral biasing forces to straighten any bow that is inherent in a fiber-optics lens. The seal can be made by conventional extrusion techniques followed by attachment or creation of a suitable foam material on the interior surface.