Douglas A Kreckel

6606463, Aug 12, 2003

Dec 12, 2001

10/012442

Eric M. Gross - Rochester NY
Scott M. Silence - Fairport NY
Ralph A. Shoemaker - Rochester NY
Douglas A. Kreckel - Webster NY
Jean A. Maksymiak - Fairport NY
Raymond L. Mongeon - Rochester NY
Joseph A. Mastrandrea - Webster NY
R. Enrique Viturro - Rochester NY

Xerox Corporation - Stamford CT

G03G 1508

399 30, 399 64, 399 65

A toner maintenance system for an electrophotographic developer unit, including a sump for storing a quantity of developer material comprised of toner material; a first member for transporting developer material from the sump, a viewing window, in communication with toner material, in the sump; an optical sensor, for measuring reflected light off the viewing window and toner material, and generating a signal indicative thereof. A toner concentration controller is adapted to receive a signal from the optical sensor and to generate an âAdd Tonerâ signal to replenish toner material in the sump.

6735399, May 11, 2004

May 17, 2002

10/151121

Charles H. Tabb - Rochester NY
Scott M. Silence - Fairport NY
Jane M. Kanehl - Bloomfield NY
Douglas A. Kreckel - Webster NY

Xerox Corporation - Stamford CT

G03G 1500

399 8, 399 12, 399 24, 399 25, 399 27

The present invention relates to utilizing memory provided in a machine replaceable sub-assembly to be one medium of distribution for software code updates to that machine relating as to how that machine should use that replaceable sub-assembly. In one embodiment, there is provided a replaceable sub-assembly for use in a machine at various setpoints including a memory and further including upgraded executable instruction suitable for directing the machine to use the replaceable sub-assembly with different setpoints, where the upgraded executable instruction is stored in the memory. In this way, the replaceable sub-assembly becomes the medium for its own or anothers software updates.

6865349, Mar 8, 2005

Mar 28, 2003

10/403322

Scott M. Silence - Fairport NY, US
Jane M. Kanehl - Bloomfield NY, US
Douglas A. Kreckel - Webster NY, US
Charles H. Tabb - Rochester NY, US

Xerox Corporation - Stamford CT

G03G015/00

399 8, 399 12, 399 24, 399 25

The present invention relates to utilizing memory provided in a machine replaceable sub-assembly to be a medium of distribution for software code updates to that machine relating as to how that machine should operate. In one alternative, there is provided a method for operating a machine employing the steps of providing a replaceable sub-assembly separable from the machine, the replaceable sub-assembly further comprising a wireless interface and a memory in which is stored software code of executable instructions. The method further provides communicating via the wireless interface with the replaceable sub-assembly to store software code of executable instructions relating to the operation of the machine into the memory. The method then provides placing the replaceable sub-assembly into the machine, reading the memory, placing the stored software code of executable instructions into the machine as new machine software code, and then operating the machine in accordance with the new software code. In this way, the replaceable sub-assembly becomes the medium for the machine's software updates.

6941084, Sep 6, 2005

Jun 26, 2003

10/607290

Eric S. Hamby - Fairport NY, US
R. Enrique Viturro - Rochester NY, US
Eric M. Gross - Rochester NY, US
Douglas A. Kreckel - Webster NY, US

Xerox Corporation - Stamford CT

G03G015/08

399 64

A method for sensing toner concentration in a developer housing with an optical system containing developer material including toner and carrier, the method, including: emitting light with the optical system through a viewing window in the developer housing onto developer material in the housing; sensing the light reflected off the developer material with the optical system; calculating a toner concentration measurement based upon the sensed light reflected off the developer material; and compensating the toner concentration measurement to account for optical variation due to the developer material condition.

7177557, Feb 13, 2007

Apr 29, 2004

10/834650

Douglas A. Kreckel - Webster NY, US

Xerox Corporation - Stamford CT

G03G 15/08

399 27, 399 30, 399 62, 399257

The present invention generally relates to a digital imaging system or a light lens based imaging system. More specifically, the present invention provides an improved method and apparatus for calculating toner age and, additionally, carrier age using a toner concentration sensor and the amount of material dispensed. Both of these quantities can be used to ensure image quality by anticipating or diagnosing problems in image quality, which may be caused by toner age or carrier age.

7498578, Mar 3, 2009

Jul 27, 2004

10/899810

Mark A. Scheuer - Williamson NY, US
Patricia J. Donaldson - Pittsford NY, US
Douglas A. Kreckel - Webster NY, US

Xerox Corporation - Norwalk CT

G01J 5/02
G01V 8/00
G01N 21/55
G03G 15/00

2503418, 2503415, 2505591, 356445, 399 74

An enhanced toner area coverage (ETAC) sensor may be calibrated to adjust for changes in LED intensity by determining a functional relationship between specular developed mass per unit area (DMA) values and diffuse readings obtained from the sensor. Specular and diffuse readings are obtained from an ETAC sensor that senses reflected light from toner patches generated with incrementally increasing densities on the photoreceptor belt. The specular readings in a particular range and their corresponding diffuse readings are selected for the calibration computations. Reflected ratios are computed from the specular readings and used to determine specular DMAs. The specular DMAs and selected diffuse readings define a set of points for which a functional relationship is determined.

8145078, Mar 27, 2012

Feb 23, 2009

12/390568

Lalit Keshav Mestha - Fairport NY, US
Sohail A. Dianat - Pittsford NY, US
Bharathi Venkitaraman - Morton IL, US
Douglas Kreckel - Webster NY, US

Xerox Corporation - Norwalk CT

G03G 15/08
G03G 15/10

399 30, 399 58

The present disclosure provides for an imaging machine having an imaging member including a method for maintaining a toner concentration. The method for maintaining the toner concentration comprises: determining a toner concentration (TC) measurement using a sensor; computing a state estimator output from the TC measurement and a pre-stored estimator gain matrix, K; computing an estimated target state from the state estimator and a pre-stored controller gain matrix, K; computing a duty cycle from the estimated target state, pixel count data, and pre-stored target decomposer output; and, updating the duty cycle by repeating the above method for the next TC cycle.

20030215247, Nov 20, 2003

May 17, 2002

10/151122

Scott Silence - Fairport NY, US
Jane Kanehl - Bloomfield NY, US
Douglas Kreckel - Webster NY, US
Charles Tabb - Rochester NY, US

Xerox Corporation

G03G015/08

399/027000

The present invention relates to utilizing memory provided in a machine replaceable sub-assembly to be one medium of distribution for software code updates to that machine relating to the machine how that machine is to use some other replaceable-sub-assembly residing within the machine. In this way, the replaceable sub-assembly becomes the medium for another replaceable sub-assembly's software updates.