Apparatus for applying an acoustic dampening coating to the interior of a xerographic drum
AssigneeXerox Corporation
InventorsSteven C. Hart, Fa-Gung Fan
Life of this patent
Estimating the term…
Abstract
This is a photoconductor and dispenser assembly and system. The photoconductor is in a tubular form so as to accept a tubular formed dispenser within its hollow portion. The dispenser will coat within this hollow portion a uniform coating of an acoustical dampening material. This material will dull any sound produced by the photoconductive marking system. The assembly is the tube having in its hollow portion this dispenser. The dispenser fits tightly but movably within the hollow portion.
Claims17
A photoconductor and dispenser assembly comprising:
- a photoconductor having a tubular form with an outer photoconductive surface and an inner surface facing a hollow inner portion of the photoconductor;
- and
- a dispenser configured to tightly slide into the hollow inner portion of the photoconductor, the dispenser having a rear end portion that is a material inlet and having, at a front end portion, a material outlet,
- the material outlet being configured as a ring gap around a circumference of the front end portion of the dispenser and positioned directly adjacent to the inner surface of the photoconductor to apply a substantially circumferentially uniform coating of a non-aspirated sound or acoustic dampening material that is extruded through the ring gap to the inner surface of the photoconductor,
- the material outlet including the ring gap being in flow relationship to a material conduit that extends through the dispenser from the rear end portion to the front end portion, a cross-sectional area of a portion of the material conduit perpendicular to a flow stream of the sound or acoustic dampening material continuously decreasing to a dispensing point where the sound or acoustic dampening material exits the material outlet, and
- the dispenser being configured to be totally removable from the hollow inner portion of the photoconductor after coating of the sound or acoustic dampening material is completed.
A coating dispenser system that coats an interior of a xerographic drum or tube, the coating dispenser comprising:
- a tubular shaped housing having a central core in an interior portion and a material flow path extending around the central core, the material flow path extending through substantially an entire length of the tubular shaped housing,
- one end of the tubular shaped housing comprising a coating material inlet opening, and an opposite end of the tubular shaped housing comprising a coating material dispensing section with a material dispensing ring gap around an outer radial circumference of the coating material dispensing section,
- the material inlet opening being configured to receive an acoustic dampening coating material,
- the material dispensing section configured to apply the acoustic dampening coating material as a uniform coating that is extruded through the ring gap and onto an inside portion of the xerographic drum or tube, the ring gap being in flow relationship to a material conduit that extends through the tubular shaped housing from the coating material inlet opening, a cross-sectional area of a portion of the material conduit perpendicular to the material flow path continuously decreasing to a dispensing point where the material dispensing section as non-aspirated extruded material, and
- a source of the acoustic dampening coating material in flow connection with the coating material inlet opening.
Dependencies are inferred from the claim text.