Abstract: A method and apparatus for providing duplex copies in pre-collated output copy sets from a set of documents recirculated in order by first copying only the even-ordered documents in the set once onto the first sides of substrates and transporting those copies to a buffer; then making individual copies in order of all the documents by alternately copying odd order documents on the reverse side of copies fed from the buffer while alternately copying even ordered documents onto copy substrates fed from a different copy substrate source, and transporting the copies made from the buffer to an output tray to create pre-collated sets while simultaneously transporting the copies from the other copy substrate source to the buffer to replace the copies fed therefrom; repeatedly individually copying all of the documents in the set in the latter manner by a number of document recirculations equal to one less than the total number of copy sets desired, and then, for a last copy set, making copies of only the odd ordered d

Abstract: A web/scroll duplex document handling system for a copier which provides document recirculation for pre-collation copying of both sides of the documents. The document is positively retained at all times by positive engagement by a document supporting web. A document is unobstructedly imaged on one side on one web, then transferred to another web while the two webs both engage the document without relative movement, and then the other side of the document is unobstructedly imaged on the other web. The two webs may be separately wound on four scrolls or a three scroll system may be provided in which one end of both webs is commonly wound on a single scroll. A set of documents are selectively wound and unwound between respective scrolls and transferred between webs to automatically provide duplex copying.

Abstract: A system wherein documents are presented to an exposure station of reproduction apparatus includes a housing in which a rack for storing documents is located. The rack includes a plurality of pockets in each of which a document may be stored, the rack being movable in a vertical direction so that any one of its pockets may be aligned with an opening in the housing. Fluid streams are used to either move a document in an aligned pocket through the opening and to the exposure station or from the exposure station into the pocket. Copies of documents presented to the exposure station are made by the reproduction apparatus. Adjacent the housing there is located an inverter into which documents from the rack are fluidically fed as desired. Inverted documents are returned to the rack with the assistance of a fluid stream. Inverted documents may be fed to the exposure station to provide duplex copies.

Abstract: In a copying apparatus, a sheet original exposure unit is provided which has an exposure window for exposing a sheet original therethrough, and a transport device for transporting the sheet original through the exposure window. The exposure window and the transport device are rotatable together. Optical elements are provided including a lens and mirrors for projecting the image of the sheet original upon a photosensitive medium, and a driving mechanism is provided which utilizes the rotation of the sheet original exposure unit to drive the transport device in the opposite direction so as to enable the back side of the sheet original to be exposed.

Abstract: A chain rotates adjacent to and at the same speed as a photoconductive drum and first and second clamps fixed to the chain grip the edges of copy sheets to move the copy sheets in synchronized contact with the drum for toner image transfer from the drum to the sheets. The first clamp grips an edge of a copy sheet for transfer of an image to the front side of the copy sheet. A turnover actuator and feed roller pair then release the first clamp and move the copy sheet away from the chain. As the second clamp approaches the actuator, it is opened thereby and the feed roller pair feeds the copy sheet back toward the chain so that the opposite edge of the copy sheet is gripped by the second clamp. The copy sheet is thereby turned over and conveyed by the chain to the drum for transfer of a toner image to the back side thereof.

Abstract: A method and apparatus are disclosed for electronic collation of sheets of a recording medium, such as paper, printed on one or both sides from electrical signals received at a printer. For printing multiple sets on one side only, the signals are written into a memory in the order in which they are received. The first set may be printed in the desired page order on a recording medium fed through the printer as the signals are received. Additional sets are printed in the same page order by writing the contents of the memory into the printer as many times as necessary as the recording medium is fed through the printer. For printing multiple sets on both sides, the signals representative of every other page are written into the memory and organized into two ordered sequences.

Abstract: A system for presenting documents to a slit-scan xerographic exposure station includes a fluidic storage station having a housing in which a rack for storing documents is located. The rack includes a plurality of pockets in each of which a document may be stored, the rack being movable in a vertical direction so that any one of its pockets may be aligned with an opening in the housing. A fluid stream is used to move a document in a pocket aligned with the opening out of the storage apparatus and into engagement with transport apparatus. The transport apparatus includes a vacuum document drum which moves a document past the exposure station and, in one mode of operation, inverts the document prior to its return to a pocket at the station. In another mode of operation, the direction of travel of the drum is reversed after the document has been exposed and the document is returned without inversion.

Abstract: A document photography system photographs the obverse and reverse faces of a moving document by tracking the document with a moving lens. The motion of the lens is in timed relation to the velocity of the document and in dimensional relation to the reduction of the lens. The lens is supported in a flexural mounting which allows the lens to be displaced upon the application of motive power. Motive power is provided by a rotational motor which has its output translated to rectilinear motion by mechanical linkage. The motor output is fed back by an optical tachometer to a phase-locked servo system to maintain uniform, linear lens motion.

Abstract: In an electrophotographic copier having a given paper travel path from supply to exit, apparatus to enable the copier to automatically make two-sided copies. An auxiliary tray is positioned to selectively receive copy sheets from the exit hopper during the two-sided copying mode of operation. The tray is pivotable about an axis located just above the primary sheet supply. When it is desired to accomplish two-sided copying, sheets upon which first-side copy have been made are directed into the auxiliary tray with the first-side copy face of the sheets oriented opposite to the original orientation in the primary supply. The tray is then pivoted so that it overlies the primary sheet supply. The sheets in the tray may then be fed by the primary feed mechanism to have the second-side copy made thereon in proper registration.

Abstract: An apparatus for photocopying information existing on both sides of a duplex document, using dual scan of a transparent sandwich platen. Duplex copies of the document document to one side of the copy sheet, and then transporting the copy sheet within the apparatus to apply a print of the second side of the document to the reverse side of the copy sheet.

Abstract: A copying apparatus capable of both-side printing comprises automatic feed means, copy medium transport means, change-over guide means shiftable between a first position for one-side printing and a second position for both-side printing, and copy medium stop means for stopping and holding the copy medium at a predetermined position when it has been directed to the automatic feed means by the change-over guide means in its second position.

Abstract: A copying machine which can image the upper side or the underside of an original onto a photosensitive surface. The original is placed onto a copyboard or between two copyboards, and the projection system for integral imaging of the upper side or the underside of such original comprises two units one of which images the upper side and the other of which images the underside of the original. A switchover device, which may constitute a component of one of the projection units, is provided to select that side of an original which is to be imaged. Alternatively, the switchover device activates the lamps for illumination of the upper side or the underside of an original.

Abstract: In a copier in which a document handling system alternatingly recirculates documents in forward serial order and then in reverse serial order relative to the optical imaging system to provide bi-directional pre-collated copying in which the copies form copy sheet sets which are alternately in forward and reverse serial order. Two copy sheet bins collect alternate copy sheet sets via a copy sheet output control which alternatingly switches the path of the copy sheets between these two bins in response to the switching between the forward and reverse serial order of copying of the documents. The first bin provides face-up stacking of the copy sheets to re-establish forward serial order collation and the second bin provides face-down stacking to maintain forward serial collation, cooperatively with the copy sheet output control.

Abstract: A sheet feeding apparatus and process wherein a movable member having a sheet receiving surface on its outer periphery includes a cavity. A supply of sheet material is supported within the cavity and feeding means are provided for feeding the sheet material outwardly from the cavity for application to the surface of the movable member. Preferably the sheet receiving surface comprises an electrostatic imaging surface. The process and apparatus may be applied to reproducing machines and processes for forming images on a single side of a sheet; on both sides of a sheet in a single pass; or for forming plural images in superimposed registration on a sheet.

Abstract: A copying machine includes a pair of copy material holders which are movable relative to a feed roller for selectively feeding copy material from either of the holders. In one embodiment, one of the holders is movable from a position adjacent the feed roller to a second position in which it receives already copied sheets. In a further embodiment, one of the holders is a pivoted cassette which is normally biased to a position adjacent the feed roller. This first cassette is movable away from the feed roller in response to the positioning of the second holder, also formed as a cassette, adjacent the feed roller. The second holder is slid into position on stationary rails.

Abstract: A method and a system are provided for concurrently copying both sides of an original by concurrently scanning nonoverlapping areas of the two sides of the original with two incident beams and scanning adjacent areas of a copy with the resulting reflected beams. Since the two incident beams illuminate areas of the original that are not overlapping, each reflected beam forms only an image of one side of the original, without a faint shadow of the other side of the original. When the original and the copy move in opposite directions and the ratio between their scanning speeds is the same as the ratio between the size of the original and the size of the copy, aligned portions of the opposite sides of the original can be aligned with each other on the copy even though non-aligned areas of the original are scanned by the incident beams.

Abstract: A duplex copying machine is provided wherein an original document, having images on both sides, is located between a transparent rotatable drum and conveyor belts and is automatically transported thereby to a first image station to expose to a photoconductor, by lamps external to the drum, the side of the document engaged by the conveyor belts. Thereafter, the document is automatically transported to a second image station to expose to the photoconductor, by lamps surrounded by the drum, the side of the document engaged by the drum.

Abstract: An electrostatographic printing machine in which a plurality of original documents are employed to create successive powder images which are transferred to a common sheet of support material. The sheet of support material is advanced along one of a plurality of selectable paths from a supply station to a receiving station. One path is arranged to move the sheet of support material to the receiving station. The other path is adapted to recirculate the sheet of support material so as to enable successive powder images to be transferred thereto. In operation, the first original is placed in the printing machine and the powder image corresponding thereto is transferred to the support material. Thereafter, the next original is placed in the printing machine and the support material is recirculated. The second powder image corresponding to the second original is then transferred to the support sheet.

Abstract: A programmable controller is used to control the operation of a xerographic reproducing machine adapted to run in a simplex or duplex mode whereby copies are made on either or both sides of web material fed in a single pass and then cut into individual copy sheets. A control program, comprised of a set of program instructions, enables the controller to generate control signals for actuation of the process devices of the reproducing machine in a timed manner for production of copies as directed by the operator. In response to instructions by the operator concerning copy length, copy numbers, etc., the control program permits the calculation of requisite timing information for control of the machine operating components. The control program permits the operation of the reproducing machine to concerning copy length, copy numbers, etc., the control program permits the calculation of requisite timing information for control of the machine operating components.

Abstract: A programmable controller is used to control the operation of a xerographic reproducing machine adapted to run in a simplex or duplex mode whereby copies are made on either or both sides of web material fed in a single pass and then cut into individual copy sheets.

Abstract: A programmable controller is used to control the operation of a xerographic reproducing machine adapted to run in a simplex or duplex mode whereby copies are made on either or both sides of web material fed in a single pass and then cut into individual copy sheets. The controller incorporates a master program, and utilizes that program and the copy run instructions programmed by the reproduction machine operator to calculate a specific machine operating program for producing the copies programmed.