Abstract: An apparatus which delivers to an operator offset batches of sheets reproduced from at least one set of documents. The operator selects the number of sheets or sets of sheets successive batches to be offset from one another. In this way, the number of copy sheets in the batch may range from a partial set of copy sheets to multiple sets of copy sheet. Also, the operator may select no offset within a job providing a straight stack with no distinction between batches or sets.

Abstract: An infrared densitometer which measures the reduction in the specular component of reflectivity as marking particles are progressively deposited on a moving photoconductive belt. Collimated light rays are projected onto the marking particles. The light rays reflected from at least the marking particles are collected and directed onto a photodiode array. The photodiode array generates electricl signals proportional to the total flux and the diffuse component of the total flux of the reflected light rays. Circuitry compares the electrical signals and determines the difference therebetween to generate an electrical signal proportional to the specular component of the total flux of the reflected light rays.

Abstract: A method of calibrating registration of a sheet with a sheet gripper on a moving transport. The sheet gripper is adapted to move the sheet in a recirculating path in a printing machine. Movement of the sheet gripper and sheet is timed from a reference time until each reaches a loading zone. The times are compared to a preselected time and the movement of the sheet gripper and sheet adjusted to correspond to the preselected time. In this way, the sheet and sheet gripper arrive at the loading zone simultaneously.

Abstract: An apparatus in which an contaminants are removed from an electrode positioned between a donor roller and a photoconductive surface. A magnetic roller is adapted to transport developer material to the donor roller. The electrode is vibrated to remove contaminants therefrom.

Abstract: An apparatus which develops an electrostatic latent image recorded on a photoconductive member with developer material of carrier granules and toner particles. A housing has a developing chamber and a mixing chamber. As toner particles are depleted during the printing process, additional toner particles are furnished to the mixing chamber. A mixing roller is located in the mixing chamber. An arcuate portion of the housing is closely adjacent to the mixing roller. An electrical bias is formed between the arcuate portion of the housing and the mixing roller. Toner particles charged to one polarity are attracted to the arcuate portion of the housing with toner particles charged to the opposite polarity being attracted to the mixing roller. As the mixing roller rotates, developer material is advanced to a receiving zone. The advancing developer material moves the toner particles attracted to the arcuate portion of the housing to the receiving zone.

Abstract: A photoelectrophoretic imaging apparatus in which a disposable, electrically biased blocking web has a portion thereof in contact with a moving heated member. A disposable imaging web, electrically biased to a polarity opposite to the polarity of the blocking web, contacts the heated portion of the blocking web. Photosensitive particles dispersed in a normally solid waxy binder matrix are interposed between the imaging web and the blocking web. A light image is projected onto the heated portion of the imaging web contacting the blocking web causing selective migration of the photosensitive particles in the liquefied waxy binder matrix in image configuration.

Abstract: An electrophotographic printing machine in which successive electrostatic latent images are recorded on a moving photoconductive belt. Each latent image is adapted to be recorded in a designated region on the photoconductive belt. The designated regions are separated from one another by an inter-image zone. A test patch is recorded in the inter-image zone. The number of designated regions on the photoconductive belt is adjusted so that the size of the inter-image zone is increased enabling a portion of the latent image to be recorded in the inter-image zone without overlapping any portion of the test patch.

Abstract: An apparatus which mixes developer material in the chamber of a developer housing. An auger transports the developer material in an axial direction from one region of chamber to another region thereof. In addition, as the developer material is being advanced in the axial direction, it is being moved in a radial direction substantially perpendicular to the axial direction of movement. In this way, the charge characteristics of the developer material are provided.

Abstract: An apparatus which controls the dispensing of marking particles into a developer unit used in an electrophotograhic printing machine adapted to reproduce a copy of an original document. The quantity of marking particles required to reproduce the copy of the original document is predicted and the dispensing of marking particles controlled in response thereto.

Abstract: An apparatus which develops a latent image recorded on a photoconductive member with developer material. The developer material is transported by a tubular member into a development zone. Developer material is attracted to the surface of the tubular member by a stationary magnet. A movable magnet translates from an operative position, wherein the magnet generates a weak magnetic field in the development zone, and a non-operative position, wherein the magnet generates a strong magnetic field in the development zone. In the operative position, the weak magnetic field releases the developer material from the surface of the tubular member so that the latent image attracts the developer material thereto. In the non-operative position, the strong magnetic field attracts the developer material to the surface of the tubular member preventing development of the latent image.

Abstract: An apparatus which measures the usage of toner in a developer unit. A donor roll receives toner material from a mixer. The mixer fluidizes the toner with the pressure from newly discharged toner moving the fluidized toner from one end of the developer unit to the other end thereof. An electrical bias is applied between the donor roll and mixer. The current biasing the mixer is detected and a signal transmitted in response thereto corresponding to the usage of toner in the developer unit. This signal controls the discharge of toner into the developer unit.

Abstract: An operator controllable apparatus which adjusts the color of a copy being reproduced from a multi-colored original document. The original document is scanned and a set of primary color densities therein measured. The measured set of primary color densities is changed to a set of colorimetric coordinates. The operator adjusts the set of colorimetric coordinates so that the copy has the desired hue, saturation and darkness. The operator adjusted set of colorimetric coordinates is transformed into a set of subtractive primary color densities. This set of subtractive primary color densities controls the marking engine to form a copy having the desired hue, saturation and darkness.

Abstract: A color image processing apparatus in which a latent image corresponding to one of the color components of an original document is recorded on an image receiving member. The original document is scanned and a plurality of color components of the original document are detected. Color signals, representative of each one of the plurality of color components detected, are generated. As the latent image is being recorded on the image receiving member, those regions of the latent image wherein the color signals have a preselected relationship to one another are erased.

Abstract: A mounting apparatus for a developer unit adapted to develop an electrostatic latent image recorded on a photoconductive member. A support system is mounted pivotably on a frame and slidably supports the developer unit. The support system pivots from an operative position wherein the developer unit is positioned adjacent the photoconductive member to a non-operative position wherein the developer unit is inclined away from the photoconductive member. In the non-operative position, the developer unit may be slidably removed from the printing machine.

Abstract: A copy system in which at least one original document of a set of original documents is edited. An editing device associated with an electrophotographic printing machine edits the information in the selected original document and designates the page number of the original document selected for editing. Original documents are advanced sequentially from the set of original documents to the printing machine. The printing machine forms a set of copies corresponding to the set of original documents with the copy of the selected original document containing the edited information.

Abstract: An apparatus in which a latent image recorded on a belt extending in a direction transverse to a horizontal plane is developed with a developer material. At least two developer rollers are mounted, at least partially, in the chamber of a housing storing a supply of developer material. The developer rollers are spaced from one another and have different diameters. The spacing between each of the developer rollers and the diameters of each of the developer rollers is selected so that a plane tangential to the lowermost region of each of the developer rollers is substantially parallel to the horizontal plane.

Abstract: An apparatus which adhesively binds a set of sheets by applying a strip having an adhesive on one surface thereof to the spine of the set. The strip is supported on a heated platen which softens the adhesive. The spine of the set of copy sheets is pressed into the adhesive on the strip. The depth of penetration of the spine into the adhesive is controlled so as to form a layer of adhesive between the spine and the strip having a predetermined thickness. As the spine of the set of copy sheets is moved into contact with the adhesive on the strip, it is damped to absorb a substantial portion of the kinetic energy of the set of sheets to reduce the deflection and distortion of the set of sheets.

Abstract: An electrophotographic printing machine in which extraneous liquid developer material on a photoconductive belt is substantially removed therefrom by a cleaning roller. A backup roller is rotatively coupled to the cleaning roller with the photoconductive belt being interposed therebetween. The rollers are pressed into contact with the photoconductive belt. Either the photoconductive belt or backup roller are moved with movement of one frictionally moving the other. In this way, the cleaning roller and the belt move with the extraneous liquid material being removed fom the belt.

Abstract: An apparatus which transfers a developed image from a photoconductive surface to a copy sheet. The apparatus includes a corona generating device arranged to charge the copy sheet. This establishes a transfer field that is effective to attract the developed image from the photoconductive surface to the copy sheet. A blade is moved from a nonoperative position spaced from the copy sheet, to an operative position, in contact therewith. The blade presses the copy sheet into contact with at least the developed image on the photoconductive surface to substantially eliminate any spaces between the copy sheet and the developed image during transfer of the developed image from the photoconductive surface to the copy sheet.

Abstract: An apparatus which transfers a liquid image from an image support surface to a sheet. A deformable cylindrical member made from a flexible, dielectric material presses the sheet against the image support surface. As the cylindrical member presses the sheet against the image support surface, it deforms to define a transfer area. A conductive roll, disposed interiorly of the cylindrical member in the transfer area, tacks the liquid image to the image support surface. A corona generating device, positioned adjacent the conductive roll interiorly of the cylindrical member, transfers the liquid image from the image support surface to the sheet.