Abstract: Three-dimensional color images are produced by combining the red image plane from a left color camera and the blue and green image planes from a right color camera. Techniques for compensating for over or underexposure in a particular image plane are deployed as well as techniques for minimizing subjective disturbance when viewing relatively pure color regions of a 3-dimensional image and for transmission of 3-dimensional color television images to users. TDM and MPEG 2 transmission techniques for stereo image transmission are disclosed. Left and right images are caused to be epipolar to reduce adverse user reaction to extended viewing of stereo images. A three dimensional perspective view may be connected to a stereo view in accordance with the invention.

Abstract: A toner module has a mixing roller and a decorator roller. The decorator roller, which extends partially through a developer opening, has a partial magnetic core enclosed by a developer carrying sleeve. Developer is removed by orientating a nonmagnetic portion of the core toward the developer opening. The decorator roller is then rotated so that the sleeve carries the used developer over the nonmagnetic portion, thereby allowing the developer to fall out of the toner module. New developer is added by orientating the magnetic portion of the core to face the developer opening. The decorator roller is then rotated so that, as the sleeve rotates over the developer to be added, the magnetic force of the developer core pulls the developer onto the sleeve and into the toner module. Orientating a magnetic portion of the mixing roller proximate to the decorator roller causes the developer to be carried further into the toner module, so as to provide for more storage volume for the developer.

Abstract: An improved toner module for use in an electrophotographic print engine. A decorator or developer roller with a rotatable core provides an apparatus for, and an improved method of, replacing developer. The decorator roller has a core that is partially magnetic and partially nonmagnetic. By rotating the decorator core to adjust the position of the non-magnetic portion of the decorator core, developer can be both removed and added without the use of any additional equipment. A mixing roller within the toner module provides for greater quantity of developer to be stored within the toner module. The disclosed toner module therefore has a greater capacity for storage of developer.

Abstract: An improved full color electrophotographic print engine using flexible belts to carry a photosensitive electrostatic image developer and a transfer belt for building up composite developed images. Each belt, and an optical scanner, are driven by mechanically independent motors which are synchronized by an electronic digital controller implementing precise servos. The use of the flexible belts allows the machine to be relatively inexpensive, very small compared to previous full color print engines, and yet maintain precise registration of color composite images. An improved fuser mechanism with increased dwell time at constant machine speed is also shown. The fuser includes a pair of spaced-apart rollers, both of which urge a sheet of image receptor against the heated roller over a predetermined angular portion of the roller. The machine is specifically designed to be used interchangeably with an optical bench source as a copier or with a laser bench as a laser printer.

Abstract: Improved dual belt synchronization for a print engine for color electrophotography using a photoreceptor belt and a seamless transfer belt on which a composite image is built up. Improved synchronization of the two belt drives enhances image registration. A tension mechanism used in conjunction with the belts prevents rapid changes in the belt dimensions. An improved transfer belt cleaner system is synchronized with the belt drives such that excess toner is not left in the imaging area of the transfer belt.

Abstract: An improved full color electrophotographic print engine using flexible belts to carry a photosensitive electrostatic image developer and a transfer belt for building up composite developed images. Each belt, and an optical scanner, are driven by mechanically independent motors which are synchronized by an electronic digital controller implementing precise servos. The use of the flexible belts allows the machine to be relatively inexpensive, very small compared to previous full color print engines, and yet maintain precise registration of color composite images. An improved fuser mechanism with increased dwell time at constant machine speed is also shown. The fuser includes a pair of spaced-apart rollers, both of which urge a sheet of image receptor against the heated roller over a predetermined angular portion of the roller. The machine is specifically designed to be used interchangeably with an optical bench source as a copier or with a laser bench as a laser printer.

Abstract: An improved full color electrophotographic print engine using flexible belts to carry a photosensitive electrostatic image developer and a transfer belt for building up composite developed images. Each belt, and an optical scanner, are driven by mechanically independent motors which are synchronized by an electronic digital controller implementing precise servos. The use of the flexible belts allows the machine to be relatively inexpensive, very small compared to previous full color print engines, and yet maintain precise registration of color composite images. An improved fuser mechanism with increased dwell time at constant machine speed is also shown. The fuser includes a pair of spaced-apart rollers, both of which urge a sheet of image receptor against the heated roller over a predetermined angular portion of the roller. The machine is specifically designed to be used interchangeably with an optical bench source as a copier or with a laser bench as a laser printer.

Abstract: An improved full color electrophotographic print engine using flexible belts to carry a photosensitive electrostatic image developer and a transfer belt for building up composite developed images. Each belt, and an optical scanner, are driven by mechanically independent motors which are synchronized by an electronic digital controller implementing precise servos. The use of the flexible belts allows the machine to be relatively inexpensive, very small compared to previous full color print engines, and yet maintain precise registration of color composite images. An improved fuser mechanism with increased dwell time at constant machine speed is also shown. The fuser includes a pair of spaced-apart rollers, both of which urge a sheet of image receptor against the heated roller over a predetermined angular portion of the roller. The machine is specifically designed to be used interchangeably with an optical bench source as a copier or with a laser bench as a laser printer.

Abstract: An improved full color electrophotographic print engine using flexible belts to carry a photosensitive electrostatic image developer and a transfer belt for building up composite developed images. Each belt, and an optical scanner, are driven by mechanically independent motors which are synchronized by an electronic digital controller implementing precise servos. The use of the flexible belts allows the machine to be relatively inexpensive, very small compared to previous full color print engines, and yet maintain precise registration of color composite images. An improved fuser mechanism with increased dwell time at constant machine speed is also shown. The fuser includes a pair of spaced-apart rollers, both of which urge a sheet of image receptor against the heated roller over a predetermined angular portion of the roller. The machine is specifically designed to be used interchangeably with an optical bench source as a copier or with a laser bench as a laser printer.

Abstract: The disclosed calibrated ASV measurement apparatus provides accurate measurements of the ASV (apparent surface voltage) on a photoconductive imaging medium using a relatively low cost, commercially available ASV probe. To obtain accurate ASV measurements, the probe sensitivity (relating probe voltgage output to sensed potential) is periodically recalibrated to compensate for changes in environmental and electrical conditions. The calibration function is implemented using a calibration target mounted directly to the housing of the probe's sensing head so as to occupy a portion of the probe's sensing field. During periodic calibration intervals, when the ASV probe is responsive only to potentials on the calibration target, known potentials are applied to the calibration target, and an indication of a change in probe sensitivity with respect to the calibration target is calculated and used to recalibrate the value for probe sensitivity used in ASV measurement.