Patents by Inventor Harold M. Anderson
Harold M. Anderson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6736561Abstract: The present invention provides a capability to form an image along a trailing edge of the paper by the use of a trailing edge deletion prevention apparatus capable of manipulating the paper to allow components capable of forming the image to travel in proximity to the paper without obstruction. In various embodiments, the invention involves the use of a biasing member or an interdigitated support element, each providing a trailing edge deletion prevention capability.Type: GrantFiled: January 24, 2001Date of Patent: May 18, 2004Assignee: Xerox CorporationInventors: Vittorio Castelli, Joannes N.M. deJong, Lloyd A. Williams, Harold M. Anderson
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Publication number: 20020098024Abstract: The present invention provides a capability to form an image along a trailing edge of the paper by the use of a trailing edge deletion prevention apparatus capable of manipulating the paper to allow components capable of forming the image to travel in proximity to the paper without obstruction. In various embodiments, the invention involves the use of a biasing member or an interdigitated support element, each providing a trailing edge deletion prevention capability.Type: ApplicationFiled: January 24, 2001Publication date: July 25, 2002Applicant: Xerox CorporationInventors: Vittorio Castelli, Joannes N. M. deJong, Lloyd A. Williams, Harold M. Anderson
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Publication number: 20020097293Abstract: An apparatus and method are provided for the use of an optical sensor to determine the position of a printing device relative to a piece of paper or a paper-handling surface. The optical sensor reads marks to detect movement and/or direction of movement or spacing of imprints on the paper. Benefits include swath stitching calibration, color to color registration, producing printing device alignment data and generating information for printing device firing signals. The present invention is applicable to a wide field of printing technologies, including, but not limited to, acoustic ink printing, thermal ink jet printing, piezo ink jet printing, ionographic printing and a variety of other printing technologies involving the need for positioning a printing device relative to a piece of paper.Type: ApplicationFiled: January 24, 2001Publication date: July 25, 2002Applicant: Xerox CorporationInventors: Vittorio Castelli, Joannes N. M. deJong, Lloyd A. Williams, Barry Wolf, Harold M. Anderson
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Publication number: 20020097291Abstract: A variety of encoder wheels and encoder wheel sensors are provided to provide precise paper locating capability relative to a printing device in an image forming system.Type: ApplicationFiled: January 24, 2001Publication date: July 25, 2002Applicant: Xerox CorporationInventors: Vittorio Castelli, Joannes N.M. deJong, Lloyd A. Williams, Harold M. Anderson
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Patent number: 6412907Abstract: An apparatus and method are provided for the use of an optical sensor to determine the position of a printing device relative to a piece of paper or a paper-handling surface. The optical sensor reads marks to detect movement and/or direction of movement or spacing of imprints on the paper. Benefits include swath stitching calibration, color to color registration, producing printing device alignment data and generating information for printing device firing signals. The present invention is applicable to a wide field of printing technologies, including, but not limited to, acoustic ink printing, thermal ink jet printing, piezo ink jet printing, ionographic printing and a variety of other printing technologies involving the need for positioning a printing device relative to a piece of paper.Type: GrantFiled: January 24, 2001Date of Patent: July 2, 2002Assignee: Xerox CorporationInventors: Vittorio Castelli, Joannes N. M. deJong, Lloyd A. Williams, Barry Wolf, Harold M. Anderson
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Patent number: 6005682Abstract: The system achieves high-resolution imaging with low-resolution two-dimensional imagers whose sensors are only a fraction of a selected pixel area. Sensors are stepped across an image with an optical or mechanical stepper to acquire an image at each sensor position. Thereby, resolution is defined by a step size which is comparable to the sensor size, rather than by pixel resolution. The system thus uses multiple image, obtained from individual sensors, which have a sensed area substantially less than the area of the pixels of the sensor array. Such rescanning is accomplished by movable mirrors or lenses that are disposed between an illuminated specimen and a sensor area.Type: GrantFiled: June 7, 1995Date of Patent: December 21, 1999Assignee: Xerox CorporationInventors: Xiaodong Wu, G. A. Neville Connell, Robert A. Street, Vittorio Castelli, Harold M. Anderson, Richard Weisfield
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Patent number: 5313252Abstract: An apparatus and method for detecting and reducing image transfer smear is provided. A pattern consisting of a sequence of toner characters or marks separated by spaces is written and developed on a photoreceptive member and then transferred to an intermediate medium. As the pattern is transferred to the intermediate medium, the velocity of the photoreceptor is varied. A photodetector is used to detect the transferred pattern on the intermediate medium and generate a signal indicative thereof. As the detector senses the absence of toner, the signal generated is greater when the space between the toner characters is largest. By monitoring when the signal is greatest and determining the corresponding velocity of the photoreceptor at that time, the best velocity match between the photoreceptor and intermediate transfer medium can be determined and set.Type: GrantFiled: September 29, 1993Date of Patent: May 17, 1994Assignee: Xerox CorporationInventors: Vittorio Castelli, Steven A. Buhler, Harold M. Anderson
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Patent number: 5287162Abstract: A detection system includes a marking device for applying to a process medium a first chevron from a first printer, a second chevron from a second printer and a third chevron from both the first printer and the second printer, the third chevron having a first element applied from the first printer and a second element applied from the second printer. The detection system further includes a detection device for detecting a matrix of times including three pluralities of times, each of the three pluralities of times corresponding to a respective time of passage of the first, second and third chevrons by the detection device. The detection system further includes a determining device for determining the alignment error based on a function of the three pluralities of times. A control system includes a marking device for applying to a process medium a first chevron from a first printer, a second chevron from a second printer and a third chevron from both the first printer and the second printer.Type: GrantFiled: June 16, 1992Date of Patent: February 15, 1994Assignee: Xerox CorporationInventors: Joannes N. M. de Jong, Vittorio R. Castelli, Harold M. Anderson, Lloyd Williams
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Patent number: 5243396Abstract: The present invention relates to design rules and geometric compensations for image forming devices. The inherent eccentricities of the photosensitive belts or drums and the timing belt speed reduction drive trains of image forming device cause misregistration of the developed latent images. To prevent such misregistration, the timing belt of the speed reduction drive train has a peripheral length which is selected from a range of values dependent on a preselected speed reduction ratio between the driven pulley and the driving pulley. Further, each one of the range of values is an integral improper fraction or integral multiple of the circumference of the driven pulley. Moreover, the driving pulley of the last pulley belt set coupled to the photosensitive member and a driven pulley prior to the last pulley belt set rotate n full rotations as the photosensitive member rotates from the image forming location to the image transfer location.Type: GrantFiled: June 17, 1992Date of Patent: September 7, 1993Assignee: Xerox CorporationInventors: Vittorio Castelli, Harold M. Anderson
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Patent number: 5176974Abstract: Disclosed are ionographic imaging apparatuses and processes. One apparatus comprises an imaging means, means for applying to the imaging means a liquid material capable of forming a dielectric peel layer adhering to the imaging means, ionographic writing means for generating a latent image on the peel layer, means for developing the latent image on the peel layer, and means for simultaneously transferring the peel layer bearing the developed image from the imaging means to a substrate and affixing the peel layer bearing the developed image to the substrate.Type: GrantFiled: October 16, 1989Date of Patent: January 5, 1993Assignee: Xerox CorporationInventors: Henry R. Till, Harold M. Anderson, Gerald A. Domoto, Aron Sereny, Joseph M. Crowley, Richard G. Crystal, John C. Knights, Rodney B. Proulx, Nicholas K. Sheridon, John M Lennon, Stephan Drappel
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Patent number: 5157443Abstract: A method and apparatus is disclosed for an improved liquid development system for a high speed reproducing machine having a movable image retention belt. The liquid development system comprising a moving belt applicator mounted on a drive assembly containing at least one drive roll and a low lateral force roll with a position guide. The belt applicator is located in alignment with the image retention belt and spaced therefrom to form a development zone having a uniform gap with an extended length. The applicator drive roll and a low lateral force roll are positoned to transport the belt applicator in the same or opposite direction as the image retention belt, but at a much faster speed to facilitate an evenly distributed flow of liquid developer and to avoid depletion of toner particles from the liquid developer moved through the development zone.Type: GrantFiled: September 23, 1991Date of Patent: October 20, 1992Assignee: Xerox CorporationInventors: Harold M. Anderson, Stephen T. Chai, Vittorio R. Castelli, Gerald A. Domoto
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Patent number: 4348624Abstract: A thermally controlled servo system in which a member supporting the drive for a device to be accurately positioned is moved relative to a stationary support member in response to changes in temperature of an elongated, tensioned member. Changes in temperature of the tensioned member are achieved by regulating the current flow through the tensioned member in accordance with a control signal derived from an error signal generated by the device to be positioned.Type: GrantFiled: March 3, 1980Date of Patent: September 7, 1982Assignee: Xerox CorporationInventors: Harold M. Anderson, Norman E. Marcum, Wilbur E. DuVall