Abstract: A gyricon or twisting-particle display based on nonspheroidal (e.g., substantially cylindrical) optically anisotropic particles disposed in a substrate. The particles can be bichromal cylinders, preferably aligned parallel to one another and packed close together in a monolayer. A rotatable disposition of each particle is achievable while the particle is thus disposed in the substrate; for example, the particles can already be rotatable in the substrate, or can be rendered rotatable in the substrate by a nondestructive operation performed on the substrate. In particular, the substrate can be made up of an elastomer that is expanded by application of a fluid thereto so as to render the particles rotatable therein. A particle, when in its rotatable disposition, is not attached to the substrate. The close-packed monolayer configuration of particles provides excellent brightness characteristics and relative ease of manufacture as compared with certain other high-brightness gyricon displays.
Type:
Grant
Filed:
September 13, 1996
Date of Patent:
April 25, 2000
Assignee:
Xerox Corporation
Inventors:
Nicholas K. Sheridon, Joseph M. Crowley
Abstract: A non-resilient belt tensioning mechanism monitors and maintains tension in a photoreceptor belt. The belt tensioning mechanism causes one of at least a pair of rollers, around which a photoreceptor belt is entrained, to exert pressure against the photoreceptor belt to apply and maintain substantially constant tension in the belt.
Type:
Grant
Filed:
October 19, 1999
Date of Patent:
April 25, 2000
Assignee:
Xerox Corporation
Inventors:
Daniel W. Costanza, Ssujan Hou, Michael F. Leo, Joseph M. Wing
Abstract: A guard inhibits access between a first member and a second member having relative motion between the first member and the second member. The guard includes a body having a first portion and a second portion. The second portion is pivotably connected to the first portion by a living hinge. The first portion of the body is connected to the first member and the second portion is connected to the second member.
Abstract: A system for detecting and damping vibrations in printer components, mechanical devices, buildings, or large structures has a plurality of light beam detectors for generating signals corresponding to a reference light beam position. The light beam detectors are partially transparent to allow passage of the light beam through the detector, permitting multiple detectors to use the same reference light beam. The detectors are attached to vibration susceptible structural elements, with detected movement of the light beam with respect to the partially transparent light beam detector corresponding to movement of the vibration susceptible structural element. Motion control units connected to the detectors can be used to control or damp detected vibrations in real-time.
Type:
Grant
Filed:
February 10, 1997
Date of Patent:
April 25, 2000
Assignee:
Xerox Corporation
Inventors:
Warren B. Jackson, Mark H. Yim, Andrew A. Berlin
Abstract: In a multicolor image forming apparatus, in order to form two pages of toner images on a transfer belt, a plurality of images are written during a first interimage period. After writing of the plurality of images, a development unit is rotated during a subsequent second interimage period to prepare for the subsequent toner color. The second interimage period is predetermined longer than the first interimage period. The second interimage is predetermined including the time required until the development of the images thus written is terminated, the time required for the rotation of the development unit and the time required for convergence of vibration caused accompanying the rotation.
Abstract: Photoconductive imaging members comprised of a mixture of dimeric perylenes as a charge generator, wherein said mixture comprises at least perylenes encompassed by the following formulas, or mixtures thereof ##STR1## wherein R is hydrogen, alkyl, cycloalkyl, oxaalkyl, substituted alkyl, aryl, substituted aryl, aralkyl or substituted aralkyl; and X is a symmetrical bridging moiety, and X--Y represents an unsymmetrical bridging moiety.
Type:
Grant
Filed:
May 21, 1999
Date of Patent:
April 18, 2000
Assignee:
Xerox Corporation
Inventors:
Cheng-Kuo Hsiao, Ah-Mee Hor, James M. Duff, Giuseppa Baranyi, C. Geoffrey Allen
Abstract: A contact electrostatic printing image separator having a substrate; and thereover a conformable layer with a conductive or semiconductive polymer; and an optional outer release layer positioned on the conformable layer, and contact electrostatic printing apparatuses including the image separator are included.
Type:
Grant
Filed:
November 13, 1998
Date of Patent:
April 18, 2000
Assignee:
Xerox Corporation
Inventors:
Constance J. Thornton, Joseph Mammino, Robert M. Ferguson, Edward L. Schlueter, Jr.
Abstract: A pixel circuit construction for image sensing includes a photosensor, an amplifier, a selector switch and, and a reset switch. The amplifier may be a single polycrystalline silicon (channel) transistor for high gain. The selector switch may also be a single polycrystalline silicon (channel) transistor for high conductivity. The reset switch may a single amorphous crystalline silicon (channel) transistor for low leakage current. The photosensor and amplifier may be connected to a shared bias line or may be connected to separate bias and drive lines, respectively. The selector and reset switches may be connected to a shared data line or may be connected to separate data and reset lines, respectively. Laser crystallization and rehydrogenation techniques are well suited to obtaining devices described herein. Threshold response is provided.
Type:
Grant
Filed:
April 28, 1998
Date of Patent:
April 18, 2000
Assignee:
Xerox Corporation
Inventors:
Ping Mei, Andrew J. Moore, Raj B. Apte, Steven E. Ready, Robert A. Street, James B. Boyce
Abstract: A post-fusing apparatus is provided in an electrostatographic reproduction machine for adding a controlled amount of moisture to a side of a fused toner image carrying copy sheet to control curl. The sheet conditioning apparatus includes a moisturizing agent supply and splitting assembly, including a supply source containing moisturizing agent and a plurality of rotatable metering rollers forming at least first and second moisture splitting nips, for splitting a layer of supplied moisturizing agent, and forming a thin film of moisture. The sheet conditioning apparatus also includes a rotatable moisture applying roller forming a moisture splitting and receiving nip with the moisture agent supply and splitting assembly, for receiving the thin film of moisture therefrom.
Abstract: A method of mixing colorants to achieve a target color includes combining individual colorants, detecting an output color of the combined colorants with a color sensing device and automatically adjusting the output color based on comparison between the detected output color and the target color. An apparatus for mixing colorants according to this method is also disclosed.
Type:
Grant
Filed:
May 22, 1998
Date of Patent:
April 18, 2000
Assignee:
Xerox Corporation
Inventors:
Lingappa K. Mestha, Sohail A. Dianat, Michael J. Rice, Edward B. Caruthers, R. Enrique Viturro
Abstract: The present invention provides a high density, edge emitting laser array structure formed by a wet oxidation process. Native oxide layers formed in adjacent grooves in the p-cladding layer Al-based alloy of the laser array structure provide both optical confinement to achieve single transverse mode operation and for electrical isolation to allow each laser diode to be independently addressable.
Abstract: A photoreceptor fabrication method involving a photoreceptor substrate having a metal surface, comprising etching the metal surface of the photoreceptor substrate with an etching solution and forming a metal oxide layer on the metal surface with the etching solution, wherein the etching of the metal surface and the forming of the metal oxide layer are conducted in the absence of an electric current.
Type:
Grant
Filed:
March 5, 1998
Date of Patent:
April 18, 2000
Assignee:
Xerox Corporation
Inventors:
Philip G. Perry, William G. Herbert, Alexandra I. Vidal, Gene W. O'Dell, Cornelius Boerman, James E. McNamara