Magnetic brush cleaning system

Claim 2

A cleaning and recirculation system for a copier machine having a photoconductor member and charging, imaging and transfer stations, arranged for processing of images on said photoconductor member, comprising: a developer station positioned adjacent said photoconductor member and having a magnetic brush normally operable to develop images on said photoconductor by deposition of toner on said photoconductor member following imaging thereof at said imaging station; cleaning station positioned adjacent said photoconductor member and having a magnetic brush normally operable to clean residual toner from said photoconductor member following transfer of an image from said photoconductor member to a receiving surface at said transfer station; and circuit means operable in a first mode to supply first predetermined bias potentials to the various stations in said system to effect developing and cleaning by said brushes as set forth and said circuit means being operable in a second mode to supply second predetermined bias potentials to the various stations in said system to effect transfer of residual toner from said cleaning station to said photoconductor member, and conveyance of said residual toner by said photoconductor member back to said developer station for re-use.

Claim 3

The system of claim 1 further comprising: recirculation control means for monitoring developing and cleaning cycles of said system and operable upon occurrence of a predetermined number of cycles to initiate said second mode of operation of said circuit means.

Claim 4

The system of claim 2 further comprising: counter means operable to count said predetermined number of cycles.

Claim 5

A cleaning and recirculation system for a copier machine having a photoconductor member, and various stations, arranged for processing of images on said photoconductor member, comprising: a charging station operable to uniformly charge said photoconductor member; an imaging station to discharge said photoconductor member in accordance with light patterns derived from an original document; a first erase station; a developer station positioned adjacent said photoconductor member and having a magnetic brush normally operable to develop images on said photoconductor by deposition of toner on said photoconductor member following imaging thereof at said imaging station; a transfer station operable to effect transfer of an image developed on said photoconductor to a receiving surface; a second erase station; a cleaning station positioned adjacent said photoconductor member and having a magnetic brush normally operable to clean residual toner from said photoconductor member following transfer of an image from said photoconductor to a receiving surface at said transfer station; and circuit means operable in a first mode to supply first predetermined bias potentials to the various stations in said system to effect developing and cleaning by said brushes as set forth and said circuit means being operable in a second mode to supply second predetermined bias potEntials to the various stations in said system to effect transfer of residual toner from said cleaning station to said photoconductor member, and conveyance of said residual toner by said photoconductor member back to said developer station for re-use.

Claim 6

A cleaning and recirculation system for a copier machine having a photoconductor member, and various stations, arranged for processing of images on said photoconductor member, comprising: a charging station operable to uniformly charge said photoconductor member; an imaging station to discharge said photoconductor member in accordance with light patterns derived from an original document; a first erase station; a developer station positioned adjacent said photoconductor member and having a magnetic brush normally operable to develop images on said photoconductor by deposition of toner on said photoconductor member following imaging thereof at said imaging station; a transfer station operable to effect transfer of an image developed on said photoconductor to a receiving surface; a second erase station; a cleaning station positioned adjacent said photoconductor member and having a magnetic brush normally operable to clean residual toner from said photoconductor member following transfer of an image from said photoconductor to a receiving surface at said transfer station; and circuit means operable in a first mode to supply first predetermined bias potentials to the various stations in said system to effect developing and cleaning by said brushes as set forth and said circuit means being operable in a second mode to supply second predetermined bias potEntials to the various stations in said system to effect transfer of residual toner from said cleaning station to said photoconductor member, and conveyance of said residual toner by said photoconductor member back to said developer station for re-use.

Claim 7

A cleaning and recirculation system for a copier machine having a photoconductor member, and various stations arranged for processing of images on said photoconductor member, comprising: a charging station operable to uniformly charge said photoconductor member; an imaging station to discharge said photoconductor member in accordance with light patterns derived from an original document; a first erase station; a developer station positioned adjacent said photoconductor member and having a magnetic brush normally operable to develop images on said photoconductor by deposition of toner on said photoconductor member following imaging thereof at said imaging station; a transfer station operable to effect transfer of an image developed on said photoconductor to a receiving surface; a second erase station; a cleaning station positioned adjacent said photoconductor member and having a magnetic brush normally operable to clean residual toner from said photoconductor member following transfer of an image from said photoconductor to a receiving surface at said transfer station; and circuit means operable in a first mode to supply first predetermined bias potentials and gating signals to the various stations in said system to effect developing and cleaning by said brushes as set forth comprising; supplying positive potentials to said charging station and said cleaning stations and minus potentials to said developing and transfer stations, an a-c potential to said second erase station and concurrently gating off said first erase station; and said circuit means being operable in a second mode to supply second predetermined bias potentials and gating signals to the various stations in said system to effect transfer of residual toner from said cleaning station to said photoconductor member, and conveyance of said residual toner by said photoconductor member back to said developer station for re-use comprising: supplying a positive potential to said transfer station, a negative potential to said cleaning station and a higher negative potential to said developing station, an a-c potential to said first erase station, and concurrently gating off said charging station, said imaging station, and said second erase station.

Claim 8

A cleaning and recirculation system for a copier machine having a photoconductor member, and various stations arranged for processing of images on said photoconductor member, comprising: a charging station operable to uniformly charge said photoconductor member; an imaging station to discharge said photoconductor member in accordance with light patterns derived from an original document; a first erase station; a developer station positioned adjacent said photoconductor member and having a magnetic brush normally operable to develop images on said photoconductor by deposition of toner on said photoconductor member following imaging thereof at said imaging station; a transfer station operable to effect transfer of an image developed on said photoconductor to a receiving surface; a second erase station; a cleaning station positioned adjacent said photoconductor member and having a magnetic brush normally operable to clean residual toner from said photoconductor member following transfer of an image from said photoconductor to a receiving surface at said transfer station; and circuit means operable in a first mode to supply first predetermined bias potentials and gating signals to the various stations in said system to effect developing and cleaning by said brushes as set forth comprising; supplying positive potentials to said charging station and said cleaning stations and minus potentials to said developing and transfer stations, an a-c potential to said second erase station and concurrently gating off said first erase station; and said circuit means being operable in a second mode to supply second predetermined bias potentials and gating signals to the various stations in said system to effect transfer of residual toner from said cleaning station to said photoconductor member, and conveyance of said residual toner by said photoconductor member back to said developer station for re-use comprising: supplying a positive potential to said transfer station, a negative potential to said cleaning station and a higher negative potential to said developing station, an a-c potential to said first erase station, and concurrently gating off said charging station, said imaging station, and said second erase station.

Claim 9

A cleaning and recirculation system for a copier machine having various stations arranged for processing of images member, comprising: a photoconductor member, said photoconductor member having at least one image area and at least one inter-image area; a charging station operable to uniformly charge said photoconductor member; an imaging station to discharge said photoconductor member in accordance with light patterns derived from an original document; a developer station positioned adjacent said photoconductor member and normally operable to develop images in the image area on said photoconductor by deposition of toner on said photoconductor member following imaging thereof at said imaging station; a transfer station operable to effect transfer of an image developer on said photoconductor to a receiving surface; a cleaning station positioned adjacent said photoconductor member and normally operable to clean residual toner from the image area on said photoconductor member following transfer of an image from said photoconductor member to a receiving surface at said transfer station; and circuit means operable in a copy-making mode to supply first predetermined bias potentials to the various stations in said system to effect developing and cleaning of said image area as set forth and said circuit means being further operable in a recirculate mode to supply second predetermined bias potentials to the various stations in said system to effect transfer of residual toner from said cleaning station to the inter-image area on said photoconductor member in an alternating fashion with said copy-making mode, and conveyance of said residual toner by said photoconductor member back to said developer station for re-use.

Claim 10

A cleaning and recirculation system for a copier machine having various stations arranged for processing of images member, comprising: a photoconductor member, said photoconductor member having at least one image area and at least one inter-image area; a charging station operable to uniformly charge said photoconductor member; an imaging station to discharge said photoconductor member in accordance with light patterns derived from an original document; a developer station positioned adjacent said photoconductor member and normally operable to develop images in the image area on said photoconductor by deposition of toner on said photoconductor member following imaging thereof at said imaging station; a transfer station operable to effect transfer of an image developer on said photoconductor to a receiving surface; a cleaning station positioned adjacent said photoconductor member and normally operable to clean residual toner from the image area on said photoconductor member following transfer of an image from said photoconductor member to a receiving surface at said transfer station; and circuit means operable in a copy-making mode to supply first predetermined bias potentials to the various stations in said system to effect developing and cleaning of said image area as set forth and said circuit means being further operable in a recirculate mode to supply second predetermined bias potentials to the various stations in said system to effect transfer of residual toner from said cleaning station to the inter-image area on said photoconductor member in an alternating fashion with said copy-making mode, and conveyance of said residual toner by said photoconductor member back to said developer station for re-use.

Claim 11

A cleaning and recirculation system for a copier machine having various stations arranged for processing of images, comprising: a photoconductor member, said photoconductor member having at least one image area and at least one inter-image area; a charging station operable to uniformly charge said photoconductor member; an imaging station to discharge said photoconductor member in accordance with light patterns derived from an original document; a developer station positioned adjacent to said photoconductor member and having a magnetic brush normally operable to develop images in the image area on said photoconductor by deposition of toner on said photoconductor member following imaging thereof at said imaging station; a transfer station operable to effect transfer of an image developed on said photoconductor to a receiving surface; a cleaning station positioned adjacent said photoconductor member and having a magnetic brush normally operable to clean residual toner from the image area on said photoconductor member following transfer of an image from said photoconductor to a receiving surface at said transfer station; and circuit means operable in a copy-making mode to supply first predetermined bias potentials to the various stations in said system to effect developing and cleaning of said image area by said brushes as set forth and said circuit means being further operable in a recirculate mode to supply second predetermined bias potentials to the various stations in said system to effect transfer of residual toner from said cleaning station to said inter-image area on said photoconductor member in an alternating fashion with said copy-making mode, and conveyance of said residual toner by said photoconductor member back to said developer station for re-use.

Claim 12

A cleaning and recirculation system for a copier machine having various stations arranged for processing of images, comprising: a photoconductor member, said photoconductor member having at least one image area and at least one inter-image area; a charging station operable to uniformly charge said photoconductor member; an imaging station to discharge said photoconductor member in accordance with light patterns derived from an original document; a developer station positioned adjacent to said photoconductor member and having a magnetic brush normally operable to develop images in the image area on said photoconductor by deposition of toner on said photoconductor member following imaging thereof at said imaging station; a transfer station operable to effect transfer of an image developed on said photoconductor to a receiving surface; a cleaning station positioned adjacent said photoconductor member and having a magnetic brush normally operable to clean residual toner from the image area on said photoconductor member following transfer of an image from said photoconductor to a receiving surface at said transfer station; and circuit means operable in a copy-making mode to supply first predetermined bias potentials to the various stations in said system to effect developing and cleaning of said image area by said brushes as set forth and said circuit means being further operable in a recirculate mode to supply second predetermined bias potentials to the various stations in said system to effect transfer of residual toner from said cleaning station to said inter-image area on said photoconductor member in an alternating fashion with said copy-making mode, and conveyance of said residual toner by said photoconductor member back to said developer station for re-use.

Claim 13

The system of claim 7 further comprising: means mounting said photoconductor member for relative movement with respect to said stations; and means mounting said circuit means for operation in timed relation with relative movement of said photoconductor member and said stations to effect copy-making and recirculate modes in proper synchronism with respect to said image and inter-image areas on said photoconductor member.

Claim 14

The system of claim 8 wherein said photoconductor comprises a drum member and said circuit means comprises a cam member and a switch member and further comprising: a common shaft means mounting said drum member and said cam member for synchronized rotation.

Claim 15

A cleaning and recirculation system for a copier machine having various stations arranged for processing of images member, comprising: a photoconductor member, said photoconductor member having a plurality of image areas and inter-image areas interspersed between said image areas; a charging station operable to uniformly charge said photoconductor member; an imaging station to discharge said photoconductor member in accordance with light patterns derived from an original document; a developer station positioned adjacent said photoconductor member and having a magnetic brush normally operable to develop images in the image areas on said photoconductor by deposition of toner on said photoconductor member following imaging thereof at said imaging station; a transfer station operable to effect transfer of an image developed on said photoconductor to a receiving surface; a cleaning station positioned adjacent said photoconductor member and having a magnetic brush normally operable to clean residual toner from the image areas on said photoconductor member following transfer of an image from said photoconductor to a receiving surface at said transfer station; and cIrcuit means operable in a copy-making mode to supply first predetermined bias potentials to the various stations in said system to effect developing and cleaning of said image areas by said brushes as set forth and said circuit means being further operable to supply second predetermined bias potentials to the various stations in said system to effect transfer of residual toner from said cleaning station to the inter-image areas on said photoconductor member in an alternating fashion with said copy-making mode, and conveyance of said residual toner by said photoconductor member back to said developer station for re-use.

Claim 16

A cleaning and recirculation system for a copier machine having various stations arranged for processing of images member, comprising: a photoconductor member, said photoconductor member having a plurality of image areas and inter-image areas interspersed between said image areas; a charging station operable to uniformly charge said photoconductor member; an imaging station to discharge said photoconductor member in accordance with light patterns derived from an original document; a developer station positioned adjacent said photoconductor member and having a magnetic brush normally operable to develop images in the image areas on said photoconductor by deposition of toner on said photoconductor member following imaging thereof at said imaging station; a transfer station operable to effect transfer of an image developed on said photoconductor to a receiving surface; a cleaning station positioned adjacent said photoconductor member and having a magnetic brush normally operable to clean residual toner from the image areas on said photoconductor member following transfer of an image from said photoconductor to a receiving surface at said transfer station; and cIrcuit means operable in a copy-making mode to supply first predetermined bias potentials to the various stations in said system to effect developing and cleaning of said image areas by said brushes as set forth and said circuit means being further operable to supply second predetermined bias potentials to the various stations in said system to effect transfer of residual toner from said cleaning station to the inter-image areas on said photoconductor member in an alternating fashion with said copy-making mode, and conveyance of said residual toner by said photoconductor member back to said developer station for re-use.

Claim 17

A cleaning and recirculation system for a copier machine having a photoconductor member with first and second portions and charging, imaging and transfer stations arranged for processing of images on said photoconductor member, comprising: a developer station positioned adjacent said photoconductor member and normally operable to develop images on said photoconductor member by deposition of toner on said photoconductor member following imaging thereof at said imaging station; a cleaning station incorporating a magnetic brush member, said magnetic brush member having a first portion positioned adjacent the first portion of said photoconductor member, and normally operable to clean residual toner from said photoconductor member following transfer of an image from said photoconductor to a receiving surface at said transfer station and said magnetic brush member having a second portion positioned adjacent the second portion of said photoconductor member operable to convey residual toner onto the second portion of said photoconductor member; and circuit means operable in a copy-making mode to supply first predetermined bias potentials to the various stations in said system to effect developing, and cleaning by said first magnetic brush portion and said circuit means further being operable to supply second predetermined bias potentials to the various stations in said system to effect transfer of residual toner from said cleaning station by said second magnetic brush portion to said photoconductor member, and conveyance of said residual toner by said photoconductor member back to said developer station for re-use concurrently with said copy-making mode.

Claim 18

A cleaning and recirculation system for a copier machine having a photoconductor member with first and second portions and charging, imaging and transfer stations arranged for processing of images on said photoconductor member, comprising: a developer station positioned adjacent said photoconductor member and normally operable to develop images on said photoconductor member by deposition of toner on said photoconductor member following imaging thereof at said imaging station; a cleaning station incorporating a magnetic brush member, said magnetic brush member having a first portion positioned adjacent the first portion of said photoconductor member, and normally operable to clean residual toner from said photoconductor member following transfer of an image from said photoconductor to a receiving surface at said transfer station and said magnetic brush member having a second portion positioned adjacent the second portion of said photoconductor member operable to convey residual toner onto the second portion of said photoconductor member; and circuit means operable in a copy-making mode to supply first predetermined bias potentials to the various stations in said system to effect developing, and cleaning by said first magnetic brush portion and said circuit means further being operable to supply second predetermined bias potentials to the various stations in said system to effect transfer of residual toner from said cleaning station by said second magnetic brush portion to said photoconductor member, and conveyance of said residual toner by said photoconductor member back to said developer station for re-use concurrently with said copy-making mode.

Claim 19

A cleaning and recirculation system for a copier machine having a photoconductor member with first and second portions and charging, imaging and transfer stations, arranged for processing of images on said photoconductor member, comprising: a magnetic brush developer station positioned adjacent said photoconductor member and normally operable to develop images on said photoconductor by deposition of toner on said photoconductor member following imaging thereof at said imaging station; a cleaning station incorporating a magnetic brush member said magnetic brush member having a first portion positioned adjacent the first portion of said photoconductor member, and normally operable to clean residual toner from said photoconductor member following transfer of an image from said photoconductor member to a receiving surface at said transfer station and said magnetic brush member having a second portion positioned adjacent the second portion of said photoconductor member and operable to convey residual toner onto the second portion of said photoconductor member; and circuit means operable in a copy-making mode to supply first predetermined bias potentials to the various stations in said system to effect developing, and cleaning by said first magnetic brush portion and said circuit means further being operable to supply second predetermined bias potentials to the various stations in said system to effect transfer of residual toner from said cleaning station by said second magnetic brush portion to said photoconductor member, and conveyance of said residual toner by said photoconductor member back to said developer station for re-use concurrently with said copy-making mode.

Claim 20

A cleaning and recirculation system for a copier machine having a photoconductor member with first and second portions and charging, imaging and transfer stations, arranged for processing of images on said photoconductor member, comprising: a magnetic brush developer station positioned adjacent said photoconductor member and normally operable to develop images on said photoconductor by deposition of toner on said photoconductor member following imaging thereof at said imaging station; a cleaning station incorporating a magnetic brush member said magnetic brush member having a first portion positioned adjacent the first portion of said photoconductor member, and normally operable to clean residual toner from said photoconductor member following transfer of an image from said photoconductor member to a receiving surface at said transfer station and said magnetic brush member having a second portion positioned adjacent the second portion of said photoconductor member and operable to convey residual toner onto the second portion of said photoconductor member; and circuit means operable in a copy-making mode to supply first predetermined bias potentials to the various stations in said system to effect developing, and cleaning by said first magnetic brush portion and said circuit means further being operable to supply second predetermined bias potentials to the various stations in said system to effect transfer of residual toner from said cleaning station by said second magnetic brush portion to said photoconductor member, and conveyance of said residual toner by said photoconductor member back to said developer station for re-use concurrently with said copy-making mode.

Claim 21

A cleaning and recirculation system for a copier machine having a photoconductor member with first and second portions and charging, imaging and transfer stations, arranged for processing of images on said photoconductor member, comprising: a charging station operable to uniformly charge said photoconductor member; an imaging station to discharge said photoconductor member in accordance with light patterns derived from an original document; a first erase station positioned adjacent the first portion of said photoconductor member; a magnetic brush developer station positioned adjacent said photoconductor member and normally operable to develop images on said photoconductor member by deposition of toner on said photoconductor member following imaging thereof at said imaging station; a transfer station operable to effect transfer of an image developed on said photoconductor to a receiving surface; a second erase station positioned adjacent the second portion of said photoconductor member; a cleaning station incorporating a magnetic brush member, said magnetic brush member having a first portion positioned adjacent the first portion of said photoconductor member, and normally operable to clean residual toner from said photoconductor member following transfer of an image from said photoconductor to a receiving surface at said transfer station, and said magnetic brush member having a second portion positioned adjacent the second portion of said photoconductor member and operable to convey residual toner onto the second portion of said photoconductor member; and circuit means operable in a copy-making mode to supply first predetermined bias potentials to the various stations in said system to effect developing, and cleaning by said first magnetic brush portion comprising supplying positive potentials to said charging station and said cleaning station and minus potentials to said developing and transfer stations, and an a-c potential to said first erase station; and said circuit means further being operable to supply second predetermined bias potentials to the various stations in said system to effect transfer of residual toner from said cleaning station by said second magnetic brush portion to said photoconductor member, and conveyance of said residual toner by said photoconductor member back to said developer station for re-use concurrently with said copy-making mode, comprising: supplying positive potential to said transfer stations, a negative potential to said cleaning station, and a higher negative potential to said developing station, and an a-c potential to said second erase station.

Claim 22

A cleaning and recirculation system for a copier machine having a photoconductor member with first and second portions and charging, imaging and transfer stations, arranged for processing of images on said photoconductor member, comprising: a charging station operable to uniformly charge said photoconductor member; an imaging station to discharge said photoconductor member in accordance with light patterns derived from an original document; a first erase station positioned adjacent the first portion of said photoconductor member; a magnetic brush developer station positioned adjacent said photoconductor member and normally operable to develop images on said photoconductor member by deposition of toner on said photoconductor member following imaging thereof at said imaging station; a transfer station operable to effect transfer of an image developed on said photoconductor to a receiving surface; a second erase station positioned adjacent the second portion of said photoconductor member; a cleaning station incorporating a magnetic brush member, said magnetic brush member having a first portion positioned adjacent the first portion of said photoconductor member, and normally operable to clean residual toner from said photoconductor member following transfer of an image from said photoconductor to a receiving surface at said transfer station, and said magnetic brush member having a second portion positioned adjacent the second portion of said photoconductor member and operable to convey residual toner onto the second portion of said photoconductor member; and circuit means operable in a copy-making mode to supply first predetermined bias potentials to the various stations in said system to effect developing, and cleaning by said first magnetic brush portion comprising supplying positive potentials to said charging station and said cleaning station and minus potentials to said developing and transfer stations, and an a-c potential to said first erase station; and said circuit means further being operable to supply second predetermined bias potentials to the various stations in said system to effect transfer of residual toner from said cleaning station by said second magnetic brush portion to said photoconductor member, and conveyance of said residual toner by said photoconductor member back to said developer station for re-use concurrently with said copy-making mode, comprising: supplying positive potential to said transfer stations, a negative potential to said cleaning station, and a higher negative potential to said developing station, and an a-c potential to said second erase station.

Claim 23

A cleaning and recirculation system for a copier machine having various stations arranged for processing of images, comprising: a photoconductor member; a charging station operable to uniformly charge said photoconductor member; an imaging station to discharge said photoconductor member in accordance with light patterns derived from an original document; a developing station positioned adjacent said photoconductor member and normally operable to develop images in the image areas on said photoconductor deposition of toner on said photoconductor member following imaging thereof at said imaging station; a cleaning station positioned adjacent said photoconductor member and normally operable to clean residual toner from said photoconductor member following transfer of an image from said photoconductor to a receiving surface at said transfer station; and circuit means operable in a copy-making mode to supply first predetermined bias potential to the various stations in said system to effect developing and cleaning as set forth; and auger means interconnecting said developer station and said cleaning station and operable concurrently with copy-making operations to effect transfer of residual toner from said cleaning station to said developer station for re-use.

Claim 24

A cleaning and recirculation system for a copier machine having various stations arranged for processing of images, comprising: a photoconductor member; a charging station operable to uniformly charge said photoconductor member; an imaging station to discharge said photoconductor member in accordance with light patterns derived from an original document; a developing station positioned adjacent said photoconductor member and normally operable to develop images in the image areas on said photoconductor deposition of toner on said photoconductor member following imaging thereof at said imaging station; a cleaning station positioned adjacent said photoconductor member and normally operable to clean residual toner from said photoconductor member following transfer of an image from said photoconductor to a receiving surface at said transfer station; and circuit means operable in a copy-making mode to supply first predetermined bias potential to the various stations in said system to effect developing and cleaning as set forth; and auger means interconnecting said developer station and said cleaning station and operable concurrently with copy-making operations to effect transfer of residual toner from said cleaning station to said developer station for re-use.

Claim 25

A cleaning and recirculation system foR a copier machine having a photoconductor member and charging, imaging and transfer stations arranged for processing of images on said photoconductor member, comprising: an auxiliary member associated with said photoconductor member; a charging station operable to uniformly charge said photoconductor member; an imaging station to discharge said photoconductor member in accordance with light patterns derived from an original document; a first discharge station position adjacent said photoconductor member; a magnetic brush developer station positioned adjacent said photoconductor member and normally operable to develop images on said photoconductor member by deposition of toner on said photoconductor member following imaging thereof at said imaging station; a transfer station operable to effect transfer of an image developed on said photoconductor member to a receiving surface; a second discharge station positioned adjacent the said auxiliary member; a cleaning station incorporating a magnetic brush member, said magnetic brush member having a first portion positioned adjacent said photoconductor member, and normally operable to clean residual toner from said photoconductor member following transfer of an image from said photoconductor to a receiving surface at said transfer station, and said magnetic brush member having a second portion positioned adjacent said auxiliary member and operable to convey residual toner onto said auxiliary member; and circuit means operable in a copy-making mode to supply first predetermined bias potentials to the various stations in said system to effect developing, and cleaning by said first magnetic brush portion; and said circuit means further being operable to supply second predetermined bias potentials to the various stations in said system to effect transfer of residual toner from said cleaning station by said second magnetic brush portion to said auxiliary member, and conveyance of said residual toner by said auxiliary member back to said developer station for re-use concurrently with said copy-making mode.

Claim 26

A cleaning and recirculation system foR a copier machine having a photoconductor member and charging, imaging and transfer stations arranged for processing of images on said photoconductor member, comprising: an auxiliary member associated with said photoconductor member; a charging station operable to uniformly charge said photoconductor member; an imaging station to discharge said photoconductor member in accordance with light patterns derived from an original document; a first discharge station position adjacent said photoconductor member; a magnetic brush developer station positioned adjacent said photoconductor member and normally operable to develop images on said photoconductor member by deposition of toner on said photoconductor member following imaging thereof at said imaging station; a transfer station operable to effect transfer of an image developed on said photoconductor member to a receiving surface; a second discharge station positioned adjacent the said auxiliary member; a cleaning station incorporating a magnetic brush member, said magnetic brush member having a first portion positioned adjacent said photoconductor member, and normally operable to clean residual toner from said photoconductor member following transfer of an image from said photoconductor to a receiving surface at said transfer station, and said magnetic brush member having a second portion positioned adjacent said auxiliary member and operable to convey residual toner onto said auxiliary member; and circuit means operable in a copy-making mode to supply first predetermined bias potentials to the various stations in said system to effect developing, and cleaning by said first magnetic brush portion; and said circuit means further being operable to supply second predetermined bias potentials to the various stations in said system to effect transfer of residual toner from said cleaning station by said second magnetic brush portion to said auxiliary member, and conveyance of said residual toner by said auxiliary member back to said developer station for re-use concurrently with said copy-making mode.