Abstract: An electrophotographic printing machine of the type in which an electrostatic latent image recorded on a charge retentive surface is developed with toner particles to form a visible image thereof, including; a housing having a supply of toner and developer therein; a donor member for transporting toner from said housing to the development zone; a means for conveying toner to the donor member; means for generating a negative air stream for carrying toner therein; and a filter for removing the toner from the negative air stream, being positioned so that developer impinges on said filter to dislodge material collected in said filter.

Abstract: An electrophotographic printing machine of the type in which an electrostatic latent image recorded on a charge retentive surface is developed with toner particles to form a visible image thereof, including; a housing having a supply of toner and developer therein; a donor member for transporting toner from the housing to the development zone; a means for conveying toner to the donor member; blower for generating a negative air stream for carrying toner therein; and a filter for removing the toner from the negative air stream, the filter including filter material and spring blower, connected thereto, for oscillating the filter material to dislodge toner material collected in the filter when the generating means is disabled.

Abstract: An electrophotographic printing machine of the type in which an electrostatic latent image recorded on a charge retentive surface is developed with toner particles to form a visible image thereof, including; a housing having a supply of toner and developer therein; a donor member for transporting toner from said housing to the development zone; means for conveying toner to the donor member; means for generating a negative air stream for carrying toner therein; and a filter for removing the toner from the negative air stream, said filter including filter material and oscillation means, operational connected to said conveying means, for oscillating said filter material to dislodge toner material collected in said filter when said generating means is disabled.

Abstract: An apparatus in which a sheet is advanced into registration with different color information developed on master sheets secured releasably on different drums. Each master sheet is secured to a gripper bar having outwardly extending pins. The pins in the master sheet gripper bars mount in holes in the drum and extend outwardly therefrom. A chain driven gripper bar advances the sheet into registration with successive master sheets. The sheet gripper bar is mounted pivotably and slidably on the chain. The sheet gripper bar has notches in the leading edge thereof to mesh with the pins extending from the master sheet gripper bar. This detachably couples the sheet and the master sheet to move in unison with one another. In this way, the sheet is placed in registration with the different color information developed on each master sheet.

Abstract: A raster output scanner in which a movable scanning element scans a high intensity beam across a movable imaging member to record images thereon. The velocity of the imaging member is controlled relative to the beam, and the tilt of the beam is adjusted relative to the imaging member.

Abstract: A multicolor printing system of the type in which a plurality of latent images are recorded therein. Each one of the plurality of latent images are developed with a different color liquid developer material to form a plurality of different color liquid images. The different color liquid images are transferred, in superimposed registration with one another, to an intermediate member to form a multicolor liquid image thereon. Thereafter, the multicolor liquid image is, in turn, transferred to a sheet and fused thereto.

Abstract: An apparatus which transports a sheet through a transfer station to transfer an image from an image receiving member thereto. A stationary member has at least a portion thereof positioned closely adjacent the image receiving member to define a transfer zone therebetween. A substantial portion of the sheet is vacuum tacked to the transfer member. The sheet is moved relative to the transfer member to advance through the transfer zone so that the image is transferred from the image receiving member to the sheet.

Abstract: An apparatus in which latent images are developed with a liquid developer material of selected colors. A plurality of stationarily mounted developer units have liquid developer materials of selected colors supplied thereto. A cleaning material is furnished to clean the liquid developer material from the first developer unit having the liquid developer material supplied thereto prior to the second developer unit having the liquid developer material supplied thereto so as to prevent comingling of different color developer materials during development of the next latent image.

Abstract: A corona discharge device including a throw-away subassembly which is inexpensive and can therefore be discarded when it becomes ineffective for its intended purpose. The subassembly can be readily installed into the printing machine in which it is used. It comprises a generally rectangular-shaped insulative frame and a tungsten wire. When the subassembly is inserted into the machine, it cooperates with a generally U-shaped, conductive shield which is an integral part of the machine to form the corona discharge device.

Abstract: A printing machine including a drum adapted to have a latent image recorded on the surface thereof. The drum is positioned with the longitudinal axis thereof extending in a direction substantially transverse to the horizontal. The latent image is developed with a liquid developer to form a liquid image on the surface of the drum. The liquid image is transferred to a copy sheet. Residual liquid developer removed from the surface of the drum by the cleaning unit, flows in a downwardly direction under the influence of gravity to a liquid collector housing located at the bottom of the cleaning unit.

Abstract: An apparatus which detects when particles being dispensed into a development system have been depleted and provides a display of that condition. The apparatus advances particles from a store thereof to the development system. A detector, associated with the particle advancer, senses the exhaustion of particles being advanced to the development system.

Abstract: A printing apparatus comprising a flexible photoreceptor belt movable past a series of image processing stations, and driven around at least two support rollers, has a developer module having at least two alternately selectable stationary developer housings positioned within the run of the photoreceptor belt between the support rolls together with an articulating backup blade to alternately urge the photoreceptor belt into development engagement with one of the stationary developer housings to develop an electrostatic latent image formed on the belt.

Abstract: An electrostatographic reproducing apparatus of the two cycle variety wherein a photoconductive belt is arranged to move in a recirculating path, includes a transparent viewing platen together with an optical scanning module positioned between the viewing platen and the photoconductive belt for scanning the viewing platen which includes copy sheet registration rolls which capture the lead edge of a copy sheet at the end of scan position returning the copy sheet to the transfer position near the beginning of scan position to feed the copy sheet in timed relation to the lead edge of the developed toner image on the photoconductive belt where the belt is supported by a support roll thereby providing a short transfer zone.

Abstract: Automatic reproducing apparatus frame assembly for mounting individual reproducing apparatus components thereto including a lower frame member having a plurality of mounting elements attached thereto for mounting at least one reproducing apparatus component thereto, the mounting elements being spaced from each other and arranged in parallel fashion in one direction from one side of the frame member to the opposite side of the frame member whereby components may be mounted to the frame member at one of the alternate mounting elements of the plurality of mounting elements to provide the assembly of automatic reproducing machines having one of a plurality of process widths corresponding to the distance from one side of the frame member to one of the alternate mounting elements. Preferably the lower frame member is a plastic molded frame and the plurality of mounting elements are integrally molded therein.

Abstract: A modular developer and cleaner housing for use in an electrostatographic reproducing apparatus of the type wherein a recyclable imaging member completes two cycles for each copy produced, includes a development portion and a cleaning portion with the development portion including means for continuous development engagement with an imaging surface, and the cleaning portion including a cleaning blade for cleaning an imaging surface and including means for alternately positioning the cleaning blade into and out of cleaning engagement with the imaging surface. The cleaning portion further includes a used toner collection enclosure to collect used toner cleaned from the imaging surface by the cleaning blade which is separated from the development portion of the housing whereby toner cleaned from the imaging surface is collected separately from the developer.

Abstract: Toner dispensing apparatus comprising a toner hopper the walls of which form an elongated opening from which toner is capable of being dispensed and a dispensing roll to dispense toner from the hopper through the elongated opening into the developer chamber. The dispensing roll is a cylindrical resiliently deformable foam roll having a plurality of depressions of predetermined size, shape and volume uniformly disposed on the roll and being capable of holding finely divided toner. The deformable foam roll including the depressions has a thin toner impermeable surface. In a preferred embodiment, the depressions are a plurality of longitudinal surface grooves parallel to the axis of the roll and uniformly spaced around the circumference of the roll. The roll is positioned relative to top and bottom lobe members in the toner hopper such that it provides a seal between the toner hopper and the developer chamber.

Abstract: Toner dispensing apparatus comprising a toner hopper, the walls of which form an elongated opening from which toner is capable of being dispensed and a dispensing roll to dispense toner from the hopper through the elongated opening into the developer chamber. The dispensing roll is a cylindrical resiliently deformable foam roll having a plurality of depressions of predetermined size, shape and volume uniformly disposed on the roll and being capable of holding finely divided toner. The deformable foam roll including the depressions has a thin toner impermeable surface, the thin toner impermeable surface and the foam roll of the dispensing roll being separate layers bonded together at their interface. In a specific embodiment, the depressions are a plurality of longitudinal surface grooves parallel to the axis of the roll and uniformly spaced around the circumference of the roll.

Abstract: An electrophotographic printing machine in which an original document is reproduced on a copy sheet. The printing machine includes a photoconductive belt arranged to move in a recirculating path. As the photoconductive belt moves through a first cycle, a combined charging-transferring unit charges at least a portion of the photoconductive belt, and a combined exposing-discharging unit focuses a light image of the original document thereon. This records an electrostatic latent image on the photoconductive belt which is developed by a combined developing-cleaning unit. During the second cycle, the charging-transferring unit transfers the toner powder image to the copy sheet, and the combined developing-cleaning unit removes residual particles from the photoconductive belt. After cleaning, the combined exposing-discharging unit illuminates the photoconductive belt to eliminate any charge remaining thereon.

Abstract: An electrophotographic printing machine in which a single processing station performs the functions of cleaning a photoconductive member and developing an image recorded thereon. The magnetic field, in the region of the photoconductive member, is controlled so as to be weak during development and strong during cleaning.

Abstract: An apparatus which develops a latent image by transporting developer material closely adjacent thereto. The apparatus includes a magnetic member having a magnetic portion formed integrally with a support portion.