Patent ID: 6219075
Filing Date: 2001-04-17
Classification: B41J

Abstract:
A printing machine comprising:a photoreceptor;a charging device located adjacent said photoreceptor and having a height H, said charging device for charging said photoreceptor;an exposure device for exposing said charged photoreceptor to produce an electrostatic latent image, said exposure device being adjacent said photoreceptor and adjacent said charging device, said exposure device having a plurality of light emitting diodes in an object plane; a gradient index lens array disposed between said plurality of light emitting diodes and said photoreceptor for focusing light from said plurality of light emitting diodes onto said photoreceptor, wherein said gradient index lens array is comprised of a plurality of gradient index rods; and a cooling assembly in thermal communication with said plurality of light emitting diodes for cooling said plurality of light emitting diodes, wherein said cooling assembly is disposed away from said photoreceptor, and wherein said cooling assembly has a width greater than a width of said gradient index lens array; anda developing station adjacent said photoreceptor and said exposure device, said developing station for depositing toner onto said electrostatic latent image;wherein said charging device is separated from said developing station by a distance that is less than the width of said cooling assembly.