Abstract: At least sequential current and subsequent sheets of a print job are received in a document processing system. Each sheet includes a front image and a back image. The received sheets are scheduled to be printed with at least one of a first and a second sequence by at least one of a first and a second marking engine based on a comparison of the image content in corresponding selected portions of each front and back image.

Abstract: Many xerographic machines have a motor polygon assembly (MPA), which is a rotating polygonal mirror. As the MPA rotates, it reflects a modulated light beam to produce scan lines on a photoreceptor. Inconsistencies in the MPA can cause inconsistencies in the scan lines, and therefore banding in a printed document. Misalignment, improper mounting, improper manufacture, or sources can cause the MPA inconsistencies. The banding is periodic, can be measured and can be compensated for. Although the modulated light beam can be modulated by many sources, further modulation using a compensation source can reduce banding.

Abstract: A test target is written in a non image zone at set time intervals. The test target is sensed. At least one of frequency, amplitude and phase of banding, which is inherent in a printing device, is determined based on the sensed test target. At least one banding compensation parameter based at least on one of the determined frequency, amplitude and phase of banding is determined. Characteristics of producing an image based on the determined banding compensation parameter are adjusted to compensate the banding inherent in the printing device.

Abstract: In a system including a plurality of elements, or plurality of subsystems of elements, each performing a process using process control to maintain operation within a latitude of a setpoint and having an output characteristic that contributes to an overall output quality specification of the system, a control method includes setting a desired overall output quality specification, and determining optimum setpoints and latitudes of the plurality of elements, within a range of possible setpoints and latitudes for each element, to achieve the desired overall output quality specification. The control method further includes dynamically re-setting the setpoints and/or re-allocating the latitudes of at least two of the plurality of elements (or subsystems of elements) to compensate for degradation of the attribute caused by variation in the output characteristic of one element within the desired overall output quality specification.

Abstract: A connectivity system capable of use with a desk (199) having a surface containing an aperture (120) includes a grommet (210, 610, 1010, 1210) and a connection hub (220, 620, 1020, 1220). The grommet has an interior surface (212, 612, 1012, 1212). The connection hub includes a connection port (221, 621, 1121, 1321) and a perimeter (222, 622, 1022, 1222). The surface of the desk defines a first plane (150) that forms a division between a first side (160) of the first plane and a second side (170) of the first plane. A portion of the perimeter of the connection hub is spaced apart from the interior surface of the grommet such that the perimeter and the interior surface define a passageway (310, 710, 720, 1070, 1080, 1270) therebetween through which a cable may be passed from the first side to the second side of the surface of the desk.

Abstract: Measurements are taken of a first parameter associated with a first marking engine and of a second parameter associated with a second marking engine. The first and second measurements are compared to predetermined first and second reference values. An engine-to-engine difference is determined by calculating a difference between the first measured parameter and the second measured parameter. The difference values are compared to corresponding predetermined threshold values. Based on the comparison, a system controller selects a mode of operation of the document processing system.

Abstract: A system and method of determining a residual toner mass on a receiving member are disclosed, comprising providing one or more test patterns to the receiving member, transferring the test patterns from the receiving member to a transfer medium, determining a sensor signal obtained after transfer, processing the sensor signal obtained after transfer and determining an amount of residual toner mass based on the processed sensor signal. A xerographic marking device is also disclosed, comprising a receiving member, an array-type optical sensor or a point optical sensor arranged on the receiving member, and a controller that generates one or more test patterns, transfers the test patterns to a transfer medium, determines a sensor signal obtained after the transfer by the optical sensors, processes the determined sensor signal, and determines an amount of residual toner mass based on the processed sensor signal.