Abstract: A registration pin for a rotating drum recorder device cooperates with a film to register and support the film during loading the film onto the drum. The registration pin has a reduced profile to reduce the overall size of the drum. The pin also has a construction to permit loading of different types of films onto the drum. The head of the registration pin is provided with a profile that supports and positions the film on the drum, even though the registration pin is shorter than conventional pins. The registration pin includes at least one protrusion to sandwich the film against the surface of the drum. The protrusion may take any appropriate form. The protrusion may include a "teardrop" shaped form, in order to positively hold the film on the drum.
Abstract: An aqueous-based cutting fluid for machining photoreceptor substrates contains:(A) at least one antioxidant;(B) one or more surfactants, at least one of which is a polysiloxane surfactant;(C) at least one lubricant; and(D) water.The cutting fluid can also optionally contain one or more biocides. The cutting fluid is environmentally safe, non-toxic and biodegradable and can be removed in a postmachining cleaning process using only high quality distilled water.
Type:
Grant
Filed:
March 14, 1995
Date of Patent:
July 9, 1996
Assignee:
Xerox Corporation
Inventors:
Phillip G. Perry, Gene W. O'Dell, Ronny W. F. van Asten
Abstract: Disclosed is a migration imaging member comprising (a) a substrate, (b) a softenable layer situated on one surface of the substrate, said softenable layer comprising a softenable material and a photosensitive migration marking material, and (c) an antistatic layer situated on the surface of the substrate opposite to the surface in contact with the softenable layer.
Abstract: An ink jet maintenance system having a translatable maintenance station carriage assembly including priming nozzles, wipers and drop detection hardware for translating across the width of the front nozzle face of one or more full-width array (FWA) printbars. The system includes an FWA printbar that is pivotally articulated between a print position and a maintenance position. An articulating cap assembly facilitates capping of ink jet printbar nozzles when the maintenance station carriage assembly moves to a home position outside the edge of the printbar and provides a free space area that allows translation of the maintenance station assembly when spaced away from the printbar.
Abstract: A method and apparatus for quantizing pixels in an image formed by a plurality of pixels, each pixel constituting an image signal representing optical density of the image at a location therein, and having an original optical density value selected from one of a set of `c` original optical density values that has a number of members larger than a desired output set of `d` optical density values, through a process of error diffusion. For an input image so comprised, initially, an image signal is initially modified in accordance with previously determined error. Thereafter, during the quantization step of the process, the threshold signal for quantization determination is dynamically adjusted in accordance with previous output quantization determinations to selectively control likelihood of whether the next pixel will exceed the threshold.
Abstract: A method and apparatus for automatically adjusting the quality of printing made by a scanning type printhead or printbar upon a recording medium advanced perpendicularly to the scanning direction. The scanning printbar includes sequentially printed segments in which the dots or pixels in a segment are printed simultaneously. A source of illumination is passed across a test pattern having features indicative of printhead alignment and discernible under the illumination. The source of illumination is connected to circuitry with determines the variation in light intensity of the test pattern. A value indicative of the misalignment is calculated and used to correct the timing of firing signals between the sequentially fired banks of nozzles of a printbar.
Type:
Grant
Filed:
June 30, 1994
Date of Patent:
July 9, 1996
Assignee:
Xerox Corporation
Inventors:
William M. Lindenfelser, Frederick A. Donahue
Abstract: A recording medium holddown apparatus for holding down a recording medium traversing along a path on a platen in a post-printing area of a printer. The recording medium holddown apparatus includes a first and second holddown member located above the platen to force a recording medium having any curl flat against the platen to thereby prevent problems associated with curl such as contamination of the printhead nozzles, ink smear, paper misregistration, and carriage hangup. In addition to the holddown members, a first and second runner are disposed on a carriage carrying the printhead across the recording medium for printing. The first and second runners have upturned ends to intercept any curl of the recording medium to further avoid problems associated with recording medium curl.
Abstract: A document imaging system for the imaging at a selected first or second imaging station of document sheets to be reproduced, including a pivotably mounted liftable automatic document handler with an integral input tray for the documents sheets, and a normally closely underlying output stacking tray into which the document sheets are ejected by the automatic document handler after imaging at the first imaging station for controlled stacking and retrieval, the second imaging station having a large imaging platen for the manual placement thereon of document sheets to be scanned, and a large manual platen cover normally overlying the large imaging platen, and pivotably mounted to be liftable for the manual placement of document sheets on the large imaging platen; wherein the output stacking tray of the automatic document handler is integrally formed in the upper surfaces of the large manual platen cover and not mounted to the automatic document handler, and the automatic document handler is liftable independently
Type:
Grant
Filed:
June 7, 1995
Date of Patent:
July 9, 1996
Assignee:
Xerox Corporation
Inventors:
Robert F. Rubscha, Margaret C. Tsai, Mark H. Buddendeck
Abstract: A shared-data alteration status grasping system includes a shared-data control server 1 for storing the shared data and for recording a alterations status of the alterations of the shared data and alteration levels thereof, an edit client 2 for carrying out the process to edit the shared data, a display client 3 for stepwise displaying the alterations of the shared data on the basis of the alteration-status data that is stored in the shared-data control server in accordance with the role and interest levels of each user, and a network 4 for connecting the server and the clients. With such an arrangement, the system provides the visual information of the alterations of the shared data in the group, while the display details is varied in accordance with the significance of the role of each member and the intensity of his interest.
Abstract: A photoconductive imaging member comprised of a supporting substrate, a photogenerating layer, and a charge transport layer, and wherein said photogenerating layer is comprised of a tetrafluoro hydroxygallium phthalocyanine.
Type:
Grant
Filed:
August 3, 1995
Date of Patent:
July 9, 1996
Assignee:
Xerox Corporation
Inventors:
James D. Mayo, James M. Duff, Gordon K. Hamer, Sandra J. Gardner
Abstract: It is an object of the invention to provide a dielectric drum where manufacturing costs can be reduced while keeping pressure resistance high and having an anodic oxidized film with a uniform dielectric characteristic, and also to provide an electrostatic recording device which is inexpensive and provides a high image reliability using the dielectric drum. According to the present invention, a dielectric drum includes an aluminum substrate and a dielectric layer of an anodic oxidized film on the surface of the aluminum substrate. The aluminum substrate is produced by conducting a drawing and hardening treatment M on an aluminum alloy pipe of the 5000 series alloys of the Aluminum Association. Also, the dielectric drum is used to construct an electrostatic recording device.
Abstract: An anti-counterfeit detector and method for identifying whether a platen image portion to be photocopied contains one or several pre-selected monetary note patterns. The detection is performed in a rotation and shift invariant manner. Specifically, the pattern can be of any orientation and at any location of the image. Moreover, it can be embedded in any complicated image background.
Abstract: Workspaces provided by an object-based user interface appear to share windows and other display objects. Each workspace's data structure includes, for each window in that workspace, a linking data structure called a placement which links to the display system object which provides that window, which may be a display system object in a preexisting window system. The placement also contains display characteristics of the window when displayed in that workspace, such as position and size. Therefore, a display system object can be linked to several workspaces by a placement in each of the workspaces' data structures, and the window it provides to each of those workspaces can have unique display characteristics. The display system object can operate continuously despite switching between one workspace and another, and the windows it provides in successive workspaces can share features so that they appear to the user to be the same window or versions of the same window.
Type:
Grant
Filed:
February 27, 1995
Date of Patent:
July 2, 1996
Assignee:
Xerox Corporation
Inventors:
D. Austin Henderson, Jr., Stuart K. Card, John T. Maxwell, III
Abstract: A raster output scanning system is disclosed which utilizes a single light source, an electro-optical device and a beam-splitter to generate two partially overlapping light beams in order to scan one scan line in which the width of the scan line can be adjusted electronically. The two partially overlapping light beams in effect generate a resulting light beam. By changing the polarization factor of the electro-optical device, the intensities of the two light beams can be modified which in turn will change the width of the resulting light beam and as a result the spot size changes. By changing the spot size, the width of the scan line can be adjusted. Also, by changing the polarization factor, the position of the resulting light beam can be changed.
Abstract: A technique for saving data related to given machine events in a control that normally records machine events or faults in a first-in, first-out buffer of finite size called an occurrence log by selectively setting the control to respond to the occurrence of a given machine fault or event, monitoring the operation of the machine for the occurrence of the given machine event, and initiating the transfer of the data in the buffer to a nonvolatile memory. Also included is the technique of delaying the transfer of the data in the buffer memory to the non-volatile memory until the recording of a given set number of events is determined in the buffer.
Abstract: 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.
Abstract: A method of printing a job in either a first mode or a second mode, to produce a set of prints from a set of print-related information transmitted to a print file, is provided. In the first mode, which occurs when the set of print-related information is less than a preselected quantity, a portion of the print file is filled with the set of print-related information and the set of print-related information is read with a marker for producing the set of prints. In the second mode, which occurs when the set of print-related information is greater than the preselected quantity, the steps of filling a portion of the print file with a subset of the set of print-related information and reading the subset with the marker are repeated until the set of print-related information is read completely.
Type:
Grant
Filed:
December 16, 1993
Date of Patent:
July 2, 1996
Assignee:
Xerox Corporation
Inventors:
Robert W. Hurtz, Jeffrey A. Smith, Ronald T. Sosinski, Ernest L. Legg
Abstract: In a digital imaging document handling system for sequentially feeding plural document sheets in a document feeding path from a document input to an electronic imaging station, wherein document sheet feeding stoppages in the document feeding path are detectable, a simplified job recovery system is provided by providing a duplicate image detection system for the automatic deletion of duplicate electronic document page images. The duplicate page images may be detected efficiently without full image comparisons by checksumming the pixels of multiple cell areas for the page, deleting the least significant figures, and comparing the respective cell checksums.
Abstract: A toner composition comprised of toner resins, colorants, optional surface additives, and a charge enhancing additive obtained from the reaction of an aluminum ion-containing compound with a molar equivalent of an aromatic carboxylic acid, and an excess of an N-alkyl or N-aryl-substituted bis(hydroxyalkyl)amine in an aqueous medium at a temperature ranging from about 25.degree. C. to about 100.degree. C.
Abstract: Disclosed is an apparatus for evaporation of a vacuum evaporatable material onto a substrate, said apparatus comprising (a) a walled container for the vacuum evaporatable material having a plurality of apertures in a surface thereof, said apertures being configured so that the vacuum evaporatable material is uniformly deposited onto the substrate; and (b) a source of heat sufficient to effect evaporation of the vacuum evaporatable material from the container through the apertures onto the substrate, wherein the surface of the container having the plurality of apertures therein is maintained at a temperature equal to or greater than the temperature of the vacuum evaporatable material.