US4319831A — Cleaning device in a copying machine

Claim 1

Independent Claim 138 words

In an electrostatic copying machine comprising a member adapted to receive an electrostatic latent image on its surface, a developer system adapted to apply toner to the surface of said member to develop the electrostatic latent image to form a developed image on said member, a transfer system adapted to transfer the developed image from the surface of said member to another substrate and a cleaning device for removing residual toner that adheres to the surface to said member after the developed image has been transferred, the improvement wherein the contacting portion of said cleaning device that contacts the surface of said member for removing the residual toner comprises electrically conductive, synthetic resin, composite fibers, said composite fibers consisting of at least one electrically conductive layer containing electrically conductive fine particles and at least one electrically non-conductive layer.

Claim 2

Dependent Claim 138 words

In an electrostatic copying machine comprising a member adapted to receive an electrostatic latent image on its surface, a developer system adapted to apply toner to the surface of said member to develop the electrostatic latent image to form a developed image on said member, a transfer system adapted to transfer the developed image from the surface of said member to another substrate and a cleaning device for removing residual toner that adheres to the surface to said member after the developed image has been transferred, the improvement wherein the contacting portion of said cleaning device that contacts the surface of said member for removing the residual toner comprises electrically conductive, synthetic resin, composite fibers, said composite fibers consisting of at least one electrically conductive layer containing electrically conductive fine particles and at least one electrically non-conductive layer.

Claim 3

Dependent Claim 20 words

A machine as claimed in claim 1, wherein said contacting portion is a rotary brush or a belt having piles.

Claim 4

Dependent Claim 27 words

A machine as claimed in claim 1 or claim 2, wherein more than 10% by weight of the fibers of said contacting portion are said composite fibers.

Claim 5

Dependent Claim 20 words

A machine as claimed in claim 1 or claim 2, wherein said electrically conductive fine particles are carbon black particles.

Claim 6

Dependent Claim 54 words

A machine as claimed in claim 1 or claim 2, wherein more than 50% of the synthetic resin in said electrically conductive layer or layers and said electrically non-conductive layer or layers in said composite fibers is polyamide having a long repeating unit produced by using a monomer having 10 or more carbon atoms.

Claim 7

Dependent Claim 58 words

A machine as claimed in claim 1 or claim 2, wherein more than 50% of the synthetic resin in said electrically conductive layer or layers and said electrically non-conductive layer or layers in said composite fibers is polyester selected from the group consisting of polyethylene terephthalate, polyethylene oxybenzoate, polybutylene terephthlate and copolyesters composed mainly of the foregoing polyesters.

Claim 8

Dependent Claim 38 words

A machine as claimed in claim 1 or claim 2, wherein more than 50% of the synthetic resin in said electrically conductive layer or layers and said electrically non-conductive layer or layers in said composite fibers is polyacrylonitrile.

Claim 9

Dependent Claim 39 words

A machine as claimed in claim 1 or claim 2, wherein more than 50% of the synthetic resin in said electrically conductive layer or layers and said electrically non-conductive layer or layers in said composite fibers is regenerated cellulose.

Claim 10

Dependent Claim 34 words

A machine as claimed in claim 1 or claim 2, wherein said electrically conductive layer or layers and said electrically non-conductive layer or layers in said composite fibers contain polyalkylene oxides or a surfactant.

Claim 11

Dependent Claim 36 words

A machine as claimed in claim 1 or claim 2, wherein said electrically conductive layer or layers and said electrically non-conductive layer or layers in said composite fibers contain wax, polyethylene, silicone compound or fluorine compound.

Claim 12

Dependent Claim 24 words

A machine as claimed in claim 1 or claim 2, wherein said composite fibers have an electric resistance of less than 10 15 Ω/cm.

Claim 13

Dependent Claim 21 words

A machine as claimed in claim 11, wherein said composite fibers have an electric resistance of less than 10 13 Ω/cm.

Claim 14

Dependent Claim 34 words

A machine as claimed in claim 1 or 2, wherein the percentage of the outer surface area of said composite fiber occupied by said electrically conductive layer or layers is not more than 50%.

Claim 15

Dependent Claim 37 words

A machine as claimed in claim 1, in which said synthetic resin has a glass transition temperature of higher than 50° C. and an equilibrium moisture content, at 65% RH and 20° C., of less than 5%.

Claim 16

Dependent Claim 37 words

A machine as claimed in claim 1, in which said synthetic resin has a glass transition temperature of higher than 80° C. and an equilibrium moisture content, at 65% RH and 20° C., of less than 2%.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1985-03-15	1985-09-14	1986-03-16	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1989-03-15	1989-09-14	1990-03-16	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1993-03-15	1993-09-14	1994-03-16	$7700.00	Window Closed / Lapsed

Cleaning device in a copying machine

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