Cleaning apparatus

Claim 2

A cleaning apparatus for use in a printing machine having a transfer member adapted to secure releasably thereto a sheet of support material for movement in a recirculating path to receive a plurality of successive toner powder images of an original to be copied, including: rotary driven brush means; means for housing said brush means, said housing means having a longitudinally extending aperture therein enabling a portion of the periphery of said brush means to extend outwardly therefrom; filter means; a toner-tight conduit connecting said housing means with said filter means for conducting residual toner particles from said housing means to said filter means; means for exhausting air and residual toner particles from said housing means through said conduit to said filter means; a cam member mounted rotatably on the printing machine; biasing means for resiliently urging said housing means into engagement with said cam member; and means for driving said cam member to pivot said housing means and move said brush means from an inoperative position spaced from the transfer member to an operatiVe position in contact therewith after the sheet of support material having the plurality of successive toner powder images deposited thereon has been stripped therefrom, said brush means being adapted to dislodge residual toner particles adhering to the surface of the transfer member.

Claim 3

A printing machine of the type having a photoconductive member for recording a latent electrostatic image which is developed with toner particles in image configuration, and a transfer member adapted to secure releasably thereto a sheet of support material for movement in a recirculating path to receive a plurality of successive toner powder images, in superimposed registration, to form a multi-color copy of the original to be copied, including: rotary driven brush means; means for housing said brush means, said housing means having a longitudinally extending aperture therein enabling a portion of the periphery of said brush means to extend outwardly therefrom; filter means; a toner-tight conduit connecting said housing means with said filter means for conducting residual toner particles from said housing means to said filter means; means for exhausting air and residual toner particles from said housing means through said conduit to said filter means; a cam member mounted rotatably on the printing machine; biasing means for resiliently urging said housing means into engagement with said cam member; and means for driving said cam member to pivot said housing means and move said brush means from an inoperative position spaced from the transfer member to an operative position in contact therewith after the sheet of support material having the plurality of successive toner powder images deposited thereon has been stripped therefrom, said brush means being adapted to dislodge residual toner particles adhering to the surface of the transfer member.

Claim 4

A printing machine of the type having a photoconductive member for recording a latent electrostatic image which is developed with toner particles in image configuration, and a transfer member adapted to secure releasably thereto a sheet of support material for movement in a recirculating path to receive a plurality of successive toner powder images, in superimposed registration, to form a multi-color copy of the original to be copied, including: rotary driven brush means; means for housing said brush means, said housing means having a longitudinally extending aperture therein enabling a portion of the periphery of said brush means to extend outwardly therefrom; filter means; a toner-tight conduit connecting said housing means with said filter means for conducting residual toner particles from said housing means to said filter means; means for exhausting air and residual toner particles from said housing means through said conduit to said filter means; a cam member mounted rotatably on the printing machine; biasing means for resiliently urging said housing means into engagement with said cam member; and means for driving said cam member to pivot said housing means and move said brush means from an inoperative position spaced from the transfer member to an operative position in contact therewith after the sheet of support material having the plurality of successive toner powder images deposited thereon has been stripped therefrom, said brush means being adapted to dislodge residual toner particles adhering to the surface of the transfer member.

Claim 5

A multi-color electrophotographic printing machine, including: a photoconductive member; means for charging said photoconductive member to a substantially uniform potential; means for projecting a substantially single color light-image on said photoconductive member to record thereon a substantially single color electrostatic latent image; means for depositing toner particles, substantially complimentary in color to the single color light image, on the electrostatic latent image recorded on said photoconductive member; a transfer member operatively associated with said photoconductive member for movement in synchronism therewith, said transfer member being arranged to have secured releasably thereto a sheet of support material for receiving a plurality of successive toner powder images from said photoconductive member; means for removing toner particles adhering to said transfer member; and means for controlling said toner removing means, said controlling means inactivating said toner removing means in response to the sheet of support material being secured to said transfer member and activating said toner removing means in response to the sheet of support material with the plurality of successive toner powder images deposited thereon, being stripped therefrom permitting said toner removing means to remove toner particles remaining on said transfer member.

Claim 6

A multi-color electrophotographic printing machine, including: a photoconductive member; means for charging said photoconductive member to a substantially uniform potential; means for projecting a substantially single color light-image on said photoconductive member to record thereon a substantially single color electrostatic latent image; means for depositing toner particles, substantially complimentary in color to the single color light image, on the electrostatic latent image recorded on said photoconductive member; a transfer member operatively associated with said photoconductive member for movement in synchronism therewith, said transfer member being arranged to have secured releasably thereto a sheet of support material for receiving a plurality of successive toner powder images from said photoconductive member; means for removing toner particles adhering to said transfer member; and means for controlling said toner removing means, said controlling means inactivating said toner removing means in response to the sheet of support material being secured to said transfer member and activating said toner removing means in response to the sheet of support material with the plurality of successive toner powder images deposited thereon, being stripped therefrom permitting said toner removing means to remove toner particles remaining on said transfer member.