Xerox Corporation

Norman E Wright

Michael A Wiegand

David Plakosh

Mark A Smith

John H Conley

Dragana Pavlovic

Michael C Lacagnina

Frederic J Stann

Juan A Romano

Jennifer Anglum

Steven E Chen

Robert A Lonis

Mark McKrell

A method of operating a printing system according to a printing path schedule, the printing system including a duplex loop including a plurality of pitches with each pitch of the plurality of pitches operatively arranged to carry one sheet, the method including receiving input data related to one or more images to be printed, preparing a printing path schedule based on the input data, receiving an indication of the delay in the printing system, determining whether the delay is equal to a multiple of a whole pitch of the plurality of pitches, and if the delay is not equal to a multiple of a whole pitch of the plurality of pitches, adjusting the printing path schedule.

System, apparatus, and method for minimizing the impact of delays in printing path schedules

In a real-time printing system, in which large blocks of digital data corresponding to page images must be located in a memory via a translation table and accessed from the memory within a very narrow time frame, the memory-management internal program of an operating system is overridden by external instructions which lock the translation table in memory.

Real-time image data access from virtual memory in a digital printing

A high-volume digital print service has a plurality of independent and simultaneously-operable decomposers which each output decomposed image data to a common buffer. The decomposed data can be compressed for relatively long-term retention in the buffer, by means of a compression element. All of the decomposers and the compression element are operated by a central CPU facility. A control system, sensitive to the amount of data in the buffer at a given time, apportions CPU cycles among the decomposers and compression element for optimization of the entire print service. The control system can also command printing hardware to skip pitches on an imaging surface therein, in order to reduce demand for decomposed data.

System for balancing CPU demands in a high-volume print server

A digital printing system includes a plurality of decomposers which operate simultaneously and independently. Each decomposer outputs page images of decomposed data at essentially random times. The page images from the decomposers are retained in a buffer until requested by a marker which controls the printer hardware. A buffer manager records where in the buffer each page image is stored, and a stream handle is assigned to every set of page images intended to form a multi-page document. When the marker requests a particular set of page images for printing, the marker invokes a stream handle. The buffer manager, receiving the stream handle, retrieves the necessary page images from recorded locations in the buffer.

Architecture for a digital printer with multiple independent decomposers

A printer having holographic scanning disc for scanning the imaging beam from a laser diode across a recording member, the diode having diode biasing and modulating current inputs for modulating the diode and thereby exposing and creating images on the recording member, a heating-cooling device in heat exchange relation with the diode for controlling diode temperatures, and a current sensor for monitoring the diode biasing and modulating currents and operating the heating-cooling device to adjust diode temperatures to maintain diode temperatures within a non-mode hopping temperature range.

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Rochester, NY, United States of America

Norman E Wright