Xerox Corporation

Lloyd F Bean, Ii

Roger L Miller

Victor Berko-Boateng

Thomas R Race

Joseph A Swift

Robert W Gundlach

Richard L Forbes, Ii

Glenn M Keenan

Paul D Keller

Bruce E Thorp

A method and system is provided for partial job interrupt of an on-going first print job to cause a contemporaneous parallel printing of a second print job. A plurality of marking engines associated with the storage device for receiving and storing a plurality of print jobs in queue, executes a first print job and outputs the sheets to an assigned first sheet output. A user determines that a second print job sent to the system and stored in the queue behind the first print job will be undesirably delayed and so interrupts the first print job by limiting the executing of the first print job to less than all of the plurality of print engines within the printing system. An output of the first print job is maintained at the first job sheet output. The second print job can then be contemporaneously executed with the execution of the first print job with available print engines interrupted from the first print job. Second print job sheets are outputted contemporaneously at a second sheet output with the output of the first print sheet jobs. The partial job interrupt is effected at the printing system upon detection by user of a delay in the printing of the second print job. The limiting of the executing of the first print job could also be effected by contemporaneously applying images of the first print job and the second print job to the photoreceptor of a one of the marking engines.

System and method for partial job interrupt of normal order of job queue of marking systems

A toner image reproduction machine and method for producing duplex toner images on a copy sheet during a single pass of the copy sheet. The toner image reproduction machine and method include a moveable image bearing member, imaging devices including a controller for forming a first desired toner image, and a second desired toner image on said moveable image bearing member, and a moveable intermediate transfer member forming a transfer nip with the image bearing member.

Single pass duplexing method and apparatus

Toner charging and/or delivery systems and methods charge and deliver charged toner particles to an image development zone without using carrier particles. Toner particles for imaging process are charged by filling the grooves or cups of a gravure member with uncharged toner particles and charging the toner particles in the grooves or cups using a corona discharge device. The charged toner particles are then transported directly or indirectly to an imaged photoreceptor, where the charged toner particles are used to develop a latent electrostatic image on the imaged photoreceptor. The developed image is then transferred to a copy sheet and permanently fused to the copy sheet.

Toner charging system for atom imaging process

In a dual engine printing system producing a multipage print job from first and second serially connected printing engines at a common output from the second engine, where the second printing engine has a duplex return path bypassing its printing path and extending substantially therethrough, a high productivity simplex job printing mode is provided in which alternate pages are substantially simultaneously printed in both the first and second printing engines, but the alternate pages printed in the first printing engine are fed to the second printing engine duplex return path to bypass the printing path of the second printing engine and then are automatically interleaved in the common output with the alternate pages printed in the second printing engine. The duplex return path is preferably a bidirectional loop extending above the printing path and driven in a reverse sheet feeding direction for this simplex printing. In an alternate duplex job tandem printing mode, sheets printed on one side in the first printing engine are inverted and fed directly to the printing path of the second printing engine for printing their opposite sides and outputted directly to the common output. Both printing engines may be substantially identical and capable of independent duplex printing with the duplex return path driven in the forward sheet feeding direction.

High productivity dual engine simplex and duplex printing system using a

An apparatus for removing the edge raggedness and background toner level of, for example, tri-level images by reestablishing the images and cleaning fields of the first developed image with a closely spaced electrode. The toner is redistributed by electrical and/or mechanical forces which leads to the removal of edge raggedness and background toner before transfer of the tri-level images to a copy sheet.

Edge raggedness and background removal by post development member

A method and apparatus for removing the edge raggedness and background toner level of, for example, tri-level images by reestablishing the images and cleaning fields of the first developed image with a closely spaced electrode. The toner is redistributed by electrical and/or mechanical forces which leads to the removal of edge raggedness and background toner.

Transfer deletions are reduced in a xerographic copy machine by imparting a curvilinear shape to the copy paper as it passes through at least a portion of a transfer zone. In a first embodiment, a fixed shoe constrains movement of a photoreceptor belt thereover, while a second preferred arrangement uses a roller to impart the curvilinear shape to the paper. In still another arrangement, a baffle that feeds the copy paper to the transfer zone is oriented with an existing roller structure to shape the paper as desired, and the baffle may be movable to vary the shape as the paper moves into the transfer zone.

Method and apparatus for supporting photoreceptive belt and copy paper

A toner cartridge for use with a copier having a toner hopper with a first interlocking seal including a second interlocking seal being specially adapted to mate with the first interlocking seal of the toner hopper, a hinged movable panel being disposed at the bottom portion of the toner cartridge, a movable panel, seal and a filament for manipulating the movable panel.

Method and device for eliminating toner leakage from a toner cartridge

An apparatus which transfers a developed image from a photoconductive surface to a copy sheet. The apparatus includes a corona generating member arranged to charge the copy sheet. This establishes a transfer field that is effective to attract the developed image from the photoconductive surface of the copy sheet. A rotatable helical element surrounds the corona generating member and is positional to contact the copy sheet and press it into contact with at least the developed image on the photoconductive surface to eliminate transfer deletions that are caused by non-contact between the photoconductive surface and a copy sheet during the transfer step.

Blade cleanable corona porous transfer device

Optical scanners having amplified scan capabilities are presented. The scanned beam is reflected a plurality of times between two opposed reflective surfaces, one of which moves with respect to the other. In one arrangement, both reflective surfaces are mutually driven by a tuning fork on which the reflective surfaces are mounted. The design provides a stable, reliable, bidirectional scan. Scan angles and frequencies can be varied by control of electronical drive systems for the tuning fork.

Multi-reflection scanner

An apparatus in which a plurality of liquid images are transferred from a photoconductive member to a copy sheet. The liquid images, which include a liquid carrier having toner particles dispersed therein, are attached from the photoconductive member to an intermediate belt by a biased transfer roll. At the same time, the biased transfer roll squeegees the liquid carrier from the intermediate belt and the toner particles are compacted thereon in image configuration. Thereafter, the toner particles are transferred from the intermediate belt to the copy sheet in image configuration with the use of another biased transfer roll. A vacuum source and an infrared heater is employed to remove residual solvent from the intermediate member left after photoconductor to intermediate member transfer takes place.

Resilient intermediate transfer member and apparatus for liquid ink

Cleaner apparatus for electrostatographic reproducing apparatus comprises a cleaning blade in cleaning engagement with the endless charge retentive surface and end seals at each end of the charge retentive surface comprising a dense fibrous brush of resiliently flexible fibers fixed to a backing with the fibers being oriented in compression interference sealing contact with the charge retentive surface and in sealing engagement with the ends of the cleaning blade to provide a physical containment wall for bulk toner in the cleaner housing and a seal between the wall and the charge retentive surface.

Brush end seals for blade cleaner housing

An electrophotographic printing machine in which a latent image is recorded on a photoconductive surface. The latent image is developed with charged, insulating marking particles and magnetic, polar or polarizable marking particles. The charged, insulating marking particles optimize development of low density lines in the latent image with the magnetic, polar or polarizable marking particles optimizing development of halftones in the latent image.

Hybrid development system

A toner and development process involving electrostatic development without carrier is disclosed. The toner of the invention is effectively transferred from photoreceptors to plain paper after development. The toner is formed of a combination of an insulating toner and a conductive toner that are triboelectrically active with respect to each other.

Tribo induction toner combination for carrierless development

An electrophotographic printing machine in which a light image exposing a non-uniform charge pattern formed on a photoconductive member is substantially attenuated to record a latent image thereon. Substantially unattenuated light rays discharge selected portions of the charge pattern. In this manner, fatigue of the photoconductive member is minimized.

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Rochester, NY, United States of America

Lloyd F Bean, Ii