Control of photosensitive roller movement
DC CAFC
First Claim
1. An apparatus for electrophotographic imaging comprisinga photosensitive roller assembly mounted for rotation in said apparatus,a gear integral with said assembly for receiving torque from a meshing gear to cause said rotation of said assembly during imaging, anda uniform frictional drag element in contact with said assembly at a location which receives torque from said gear integral with said assembly, said drag element applying friction forces which oppose said rotation.
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Accused Products
Abstract
A toner cartridge (1) contains a photoconductive drum (49) having a central shaft (47). Gear (145) turns with the drum and has a stud (602). A coil spring (604) is mounted on the stud to form a spring clutch which is unwound by the rotation of the drum during imaging. Alternatively, a flat frictional surface is pressed against the side wall (600b) of the gear. Both contact areas have a light grease. The drag forces provide accurate, smooth operation during imaging.
21 Citations
7 Claims
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1. An apparatus for electrophotographic imaging comprising
a photosensitive roller assembly mounted for rotation in said apparatus, a gear integral with said assembly for receiving torque from a meshing gear to cause said rotation of said assembly during imaging, and a uniform frictional drag element in contact with said assembly at a location which receives torque from said gear integral with said assembly, said drag element applying friction forces which oppose said rotation.
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2. An apparatus for electrophotographic imaging comprising
a photosensitive roller assembly mounted for rotation in said apparatus on a central shaft, said assembly having a stud surrounding said central shaft, a gear integral with said assembly for receiving torque from a meshing gear to cause said rotation of said assembly during imaging, said rotation transmitting torque to said stud, and a coil spring clutch wound around said stud, the direction of winding of said spring being that which unwinds said spring during said rotation.
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6. An apparatus for electrophotographic imaging comprising
a photosensitive roller assembly mounted for rotation in said apparatus, a gear integral with said assembly for receiving torque from a meshing gear to cause said rotation of said assembly during imaging, a frictional surface located to press against said assembly at a location which receives torque from said gear integral with said assembly to uniformly resist said rotation, and a grease located between said frictional surface and said assembly.
Specification
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- Resources
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Current AssigneeLexmark International Incorporated (Ninestar Corporation)
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Original AssigneeLexmark International Incorporated (Ninestar Corporation)
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InventorsReam, Gregory Lawrence, Merrifield, David Lee, Horrall, Paul Douglas, Portig, Harald, Molloy, James John, Seman, Richard Andrew Jr., Mlejnek, Daniel George, Curry, Steven Alan
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Primary Examiner(s)Grimley, Arthur T.
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Assistant Examiner(s)Wendal, Jr., George E.
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Application NumberUS09/025,723Time in Patent Office678 DaysField of Search399/116, 399/117, 399/159, 399/167US Class Current399/167CPC Class CodesG03G 15/0855 the concentration being mea...G03G 15/0865 Arrangements for supplying ...G03G 15/0872 the developer cartridges be...
