1
Larry M Ernst: Method and apparatus for copier quality monitoring and control. International Business Machines Corporation, Earl C Hancock, March 22, 1983: US04377338 (36 worldwide citation)

Data correlated to the light reflectance of a maximum toned area and a minimum toned area is recorded to establish standards for monitoring and controlling subsequent copier operation. A test pattern is imaged onto the photoconductor by controlled illumination levels in a series of steps with the de ...


2
John H Dodge, Larry M Ernst: Method and apparatus for monitoring and controlling heated fusers for copiers. International Business Machines Corporation, Earl C Hancock, November 15, 1983: US04415800 (34 worldwide citation)

Copier fuser roller temperature is monitored during the warm-up period by a series of decreasing temperature threshold levels. Each threshold level is monitored for a preselected time period and reduced for the next time period. The sampling continues until the fuser roller temperature sensed by a t ...


3
James R Champion, Larry M Ernst, Leland W Ford, Ronald G Velarde: Apparatus and method for measuring and maintaining copy quality in an electrophotographic copier. International Business Machines Corporation, Gunter A Hauptman, April 27, 1982: US04326796 (25 worldwide citation)

Factors affecting copy quality are continuously adjusted during copying in accordance with the actual charge on the photoconductor relative to a fixed reference potential. The photoconductor, carried on a moving, partially exposed, constant potential conductive support, is sensed by a probe. The pro ...


4
Larry M Ernst, Steven D Seigal, George W Van Cleave: Dynamic reference for an image quality control system. International Business Machines Corporation, Charles E Rohrer, January 15, 1980: US04183657 (24 worldwide citation)

A system for checking copy quality variables within the image area of an electrophotographic machine. During a test cycle, quality is checked by producing sample test areas within the photoconductor image area ordinarily used for producing copies. Reflectance measurements are made on the sample test ...


5
James L Bacon, Larry M Ernst, William G Hauptman: Digitally regulated power supply for use in electrostatic transfer reproduction apparatus. International Business Machines Corporation, Wesley DeBruin, September 4, 1979: US04166690 (21 worldwide citation)

A digitally regulated power supply for the corona charging unit of an electrostatic copying machine in which a sample of the ionic current of the corona unit is utilized in conjunction with a digital regulator to regulate the power supply establishing the charge of the corona. The digital regulator ...


6
Larry M Ernst, Danielle Kathyrn Dittrich, Richard S Lucky: Method, system, and program for reducing toner usage in print output. International Business Machines Corporation, David W Victor, Konrad Rayne & Victor, December 13, 2005: US06975428 (17 worldwide citation)

Disclosed is a method, system, and program for reducing toner in an image comprised of raster pel data. A determination is made of pels surrounding subject pels. For each subject pel, a sub-pulse width power is generated to charge a sub-pel region within the subject pel based on a pattern of the sur ...


7
Danielle Kathyrn Dittrich, Larry M Ernst, Richard S Lucky: Method, system, program, and data structure for producing a look-up table to enhance print quality. International Business Machines Corporation, David W Victor, Konrad Raynes & Victor, June 20, 2006: US07064859 (16 worldwide citation)

Disclosed is a method, system, and program for generating a table for enhancing the print quality of input raster pel data. An output value is generated for different patterns of pel data. Each output value indicates a sub-pulse width power to charge a sub-pel region within a pel and position inform ...


8
Arthur G Black, John H Dodge, Larry M Ernst: Bang-bang dual-mode integral controller with proportional control output useful for temperature control. International Business Machines Corporation, Carl M Wright, Earl C Hancock, January 29, 1985: US04496829 (14 worldwide citation)

Control system which measures overshoot or undershoot time of a controlled variable with respect to a set value and adjusts a proportional count if the overshoot or undershoot time period exceeds fixed values. The proportional count is used to control the system output in a proportional manner, such ...


9
Larry M Ernst, William E McCollum, Carl A Queener, Bernard L Wilzbach: Component mounting apparatus useful for compact copiers. International Business Machines Corporation, Earl C Hancock, November 10, 1981: US04299474 (13 worldwide citation)

Electrical components in an elongated array are suspended within the interior of a sleeve type closed loop member such as a rotatable photoconductor drum or closed loop belt of a compact copier. Preferably some of the components are mounted on a board and held within the sleeve by edge slots or the ...


10
Kartheek Chandu, Larry M Ernst, Sreenath R Vantaram, Mikel J Stanich: Printer calibration for printers with fixed print array structures. Ricoh Production Print Solutions, Duft Bornsen & Fettig, September 24, 2013: US08542418 (9 worldwide citation)

The systems and methods presented herein provide for calibrating a print engine of a printing system. The printing system prints image data on a print medium and scans the printed image data. Color values of the scanned image data are then measured and various tints of color values and their transit ...