Abstract: An automatic pre-collation duplex copier in which original documents having either an odd or even number of pages may be recirculatively copied in reverse serial order yet provide properly collated output duplex copy sets. A simplex/duplex copying system is disclosed in which, when an odd number of document sheets are detected in a first, non-copying, circulation of the document sheets, the copying of the last and subsequent alternate document sheets is inhibited during the first copying circulation, whereas if an even number of document sheets are detected, the copying of the second and subsequent alternate document sheets is inhibited during this first copying circulation, and these different copying sequences are reversed for the last copying circulation. All document sheets are copied during the intermediate circulations. A compatible duplex/duplex copying system is also disclosed.

Abstract: A printing machine in which a sheet is moved into communication with a marking station to establish visible representations of indicia thereon. After establishing indicia on one side of the sheet, the sheet is inverted so that the same leading edge of the sheet moves into communication with the marking station. As the other side of the sheet moves into communication with the marking station, visible representations of indicia are established thereon.

Abstract: An automatic duplicating system in which computer fanfold documents are fed by an automatic handling apparatus having a tractor and drive means for advancing the document across the platen of the processor for the system. An arrangement is provided which will control operation of the processor and the automatic handling apparatus in order to acquire duplex copies of the simplex document. The arrangement includes circuitry and controls which advances the document in a manner wherein a copy of every other frame section is diverted to a holding station and then returned to be reprocessed on its underside with the image of the succeeding frame section.

Abstract: A duplex copying machine is provided with an open operator-accessible buffer storage tray and appropriate sheet feeding means to feed paper through the machine. In duplexing mode, sheet feeding takes place from the buffer storage tray instead of the main paper supply store.

Abstract: In a tandem duplicating system, a transport means conveys a copy sheet from a first printing station where an image is applied to the first side of the copy sheet to a second printing station where an image is applied to the second side of the same copy sheet utilizing a suction force for securing the copy sheet to a sheet conveyor, wherein only the image-free side of the copy sheet is contacted or engaged by the conveyor. Advancing copy sheets are delivered to a position subjacent the second printing station where means normally disposed beneath the conveyor are activated to engage the trailing edge of the copy sheet lift it to a position above the transport means and advance the trailing edge of the sheet into gripping means provided in the second printing station for advancing the copy sheet through the second printing station and applying an image to its second side.

Abstract: A copy production machine is capable of having copies from plural independent copy runs in a copy sheet transport path at a given instant. Such independent runs are combined to produce duplex (double-sided) copies. Recovery from jams in such duplex operations is described. The described system also distinguishes between copy sheets having images and non-imaged copy sheets. Apparatus and procedures are described for utilizing the counts for precisely recovering from loss of copy sheets due to a jam or other stoppage condition. Control of a billing meter is also disclosed.

Abstract: A duplex copying machine has an auto document feeder and is capable of duplex copying from originals having images on one side, originals having images on both sides and combinations of the aforementioned two types. In a preferred embodiment of the duplex copying machine, whether an original has images on one side only or on both sides is detected so as to obtain a duplex copy from a duplex original and a one-side copy from a one-side original.

Abstract: Copy production machine having a print mode for making copies under automatic control interruptible by a copy mode, of making copies. In the print mode images to be copied are automatically supplied to a copy production portion. In the print mode, images are preferably precollated, whereas in the copy mode, produced copies are collated from plural image sources. The first set of each print job is printed one sheet at a time ad seriatum; in subsequent sets all first sides are printed, then all second sides. The first set printing is interleaved with image signal reception and in all subsequent sets, all image signals for the sets or production portion of a set have been received.

Abstract: Apparatus operable in duplex and simplex modes for making copies having images on one or both sides thereof. In the duplex mode, first and second transferable images are formed on a movable image transfer member by an image forming device, a copy sheet is supplied from a copy sheet supply into transfer relationship with the transfer member and the first image is transferred to a first side of a copy sheet at a first image transfer station. A vacuum drum located adjacent to the transfer member is rotated in a first direction to separate the copy sheet from the transfer member. After the copy sheet has been separated, the drum is rotated in a second opposite direction to invert the copy sheet while the first image is unfixed and to register the second side with the second transferable image on the transfer member at a second image transfer station.

Abstract: A method and an apparatus for continuously patterning a photosensitive tape or foil wherein a master pattern and the tape or foil are synchronously coupled. An optical system comprising a plano-convex lens, a concave spherical mirror, and a pair of right-angle prisms is optically-coupled between the master pattern and the tape or foil for projecting an image of the pattern onto the tape. The optical system is such that the movement of the image is in the same direction as the movement of the tape. The apparatus is such that patterning can take place through projecting an image on one or on both sides of the tape. Alternatively, projecting an image on one side of the tape and contact printing of a pattern on the other side of the tape is also made possible by the apparatus.

Abstract: A duplex copying system including an improved buffer set means that receives substrates having been copied on a first side and shingles the substrates for subsequent refeeding and copying on a second side.

Abstract: Apparatus for producing duplex or simplex collated copies from duplex and simplex originals comprising a copier having a duplexing section with two transfer stations separated by a copy-sheet inverter. A document feeding section circulates and recirculates original sheets, one-after-another, for producing sets of copies in page-sequential order. The document feeder is provided with a single hopper for receiving and maintaining the originals in their usual page sequence or order so that no preparation (i.e., special arrangement) of an original is necessary prior or subsequent to copying for making collated copies. The duplexing section requires only a single fuser that is positioned so that the copy sheets pass through both transfer stations before entering the fuser, thus permitting transfer of images under similar conditions in both transfer stations.

Abstract: A duplex reproduction system which produces duplex copy sets in collated separated stacks from a stack of precollated documents includes a document feeding apparatus which feeds a stack of documents individually onto the platen of a copy processor for producing copies of each document. The copy sheets are transported to a receiving tray in a sorting apparatus which does not sort the copy sheets when producing the first side of the duplex copies. As an improvement, the copies are cleaned on the back (non-image) sides thereof to remove unfused toner. The documents are reloaded into the document feeding apparatus for feeding the documents with the second side onto the platen of the processor. On the simplex or first pass a circuit disables the sorting function of the sorting apparatus. The copy sheets are removed from a single receiving tray of the sorter for a second or duplex run.

Abstract: A method of controlling a reproduction machine to produce duplex copies from a set of original documents and for automatically adjusting the reproduction process in the event of a fault condition so that the selected number of copies are ultimately produced even though some copies may have been lost due to the fault.

Abstract: A reproduction machine for making two-sided or duplex copies. When there is an odd number of simplex original documents to be copied in the duplex mode, the last copy sheet bears an image only on one side. The present invention provides a control system for operating various machine components in response to such an occurrence in order to optimize the throughput capability of the machine.

Abstract: A copy production machine operates either in a simplex mode (each copy has an image only on one side) or in a duplex mode (copies have images on both sides). In the duplex mode, an interim storage unit stores partially completed copies (only one side of the duplex copies have an image). A second copy run completes duplex copy production. During power on sequencing, circuits sense for an intermediate copy production state (also termed intermediate state or intermediate operating state) and automatically makes machine selections for a copy production mode in accordance with the sensed intermediate state. In one early embodiment the intermediate state was copies residing in the interim storage unit and the selected copy production mode was the production of side two in a duplex mode. An electronic nonvolatile memory may also store intermediate state indications for use during power on sequencing.

Abstract: A convenience copier having duplex capabilities includes a collating feeder that inverts the document automatically for copying both sides thereof. The copier includes a processing section for establishing visible representations of the document, feeding sections for presenting document and copy sheets to the processing section on a one-document-sheet one-copy-sheet basis, and inverting means for presenting both sides of the document sheets for copying and both sides of the copy sheets for receiving the visible representations. The document feeding section circulates and recirculates the document sheets from a supply to an exposure position and back to the supply, and inverts the document sheets during such circulation and recirculation in a manner suitable for making collated copies without disturbing the sequence of the document.

Abstract: A copying machine capable of copying originals on the front and back faces of each copy medium comprises a photosensitive medium, a charger for electrostatically charging the photosensitive medium, an optical system for projecting an original image upon the photosensitive medium to form an electrostatic latent image thereof, a developing device for developing the latent image into a transferrable image, a transfer device for transferring the transferrable image onto copy mediums, a first feeder for feeding copy mediums for the front-face copying, a reversing mechanism for reversing the copy mediums fed by the first feeder after the image transfer, and a second feeder for temporally stopping the copy mediums, after reversal, on their way to the transfer device and for feeding the reversed copy mediums to the transfer device for back-face copying.

Abstract: Method and apparatus for producing duplex copies. First and second unfixed images are transferred to opposite sides of a copy sheet before fixing of either image to the copy sheet. The first and second unfixed images may be electroscopic images sequentially formed on a photoconductor by electrophotographic techniques. The first unfixed electroscopic image is transferred from the photoconductor to a first side of a copy sheet, the sheet is inverted while the first image thereon remains unfixed, the second unfixed electroscopic image is transferred to the second side of the copy sheet, the copy sheet with the first and second unfixed images thereon is then transported to a fixing station.

Abstract: Paged material stored on microform cards is reproduced with uniform page print margins on hard copy using an office microprint copier. Each card in a series is aligned with a test pattern and then perforated while aligned. The perforated cards are placed in turn on a microfiche holder for the copier having raised pins to fit the perforations. The microformed paged material is then reproduced by the copier in blown-up size in a desired sequence.

Abstract: A copying apparatus having an original carriage capable of carrying thereon an original dimensionally corresponding to the combined area of two surfaces of a desired copy size is improved so that originals carried on the two surfaces at a time can be separately copied one by one.

Abstract: A copy medium carrier for use with a copying machine or the like comprises a first copy medium containing chamber for containing therein a first load of copy mediums, and a second copy medium containing chamber for containing therein a second load of copy mediums. The first copy medium containing chamber is selectively pivotable to feeding position. The second copy medium containing chamber is selectively movable to the feeding position. The feeding from said first and said second copy medium containing chamber may be effected from the same feeding position.

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 apparatus capable of providing an image on both sides of a transfer material. The apparatus includes a pair of cassettes commonly usable as a feeding tray and a discharging tray, and a mechanism for detaching said cassettes. A transfer material fed from a cassette loaded in a feeding station has an image transferred thereto and fixed while passing through a required processing route, and said material is reversed onto an intermediary plate in a cassette loaded in the discharging tray station which is identical with the first mentioned cassette. The cassette which receives one side copied transfer materials when loaded in the discharging tray station is unloaded therefrom and loaded into the feeding station, and the reversed transfer material receives a second image in a manner similar to that described above.

Abstract: Apparatus for forming electrostatographic reproductions back-to-back on suitable support surfaces including first and second photoconductive imaging surfaces and means to provide a developed image on each photoconductive surface and provide simultaneous transfer of the developed images from the photoconductive surfaces onto both of the support surfaces.