Jeffrey P Rappette

20040188644, Sep 30, 2004

Apr 9, 2004

10/821320

Jeffrey Rappette - Waukesha WI, US
Andrew Tischendorf - Campbellsport WI, US
Mark Gerloff - New Berlin WI, US
Arie Rechavel - Glendale WI, US
Edward Boris - Cedarburg WI, US
Frank Vroman - Cedarburg WI, US
Michael Sisco - Sussex WI, US
Paul Warner - West Bend WI, US

Quad/Tech, Inc. - Sussex WI

B41F031/02
G01V008/00
H01L027/00

250/559440, 250/208100

The present invention relates generally to the field of printing presses, and specifically to a method and apparatus for visually inspecting a web moving on a printing press using a CMOS based image recording device and preferably a LED light source. The LED light source includes at least two colors of light, such as white and blue, for highlighting various ink colors with respect to the web.

57242593, Mar 3, 1998

May 4, 1995

8/434928

John C. Seymour - Jefferson WI
Jeffrey P. Rappette - Waukesha WI
Frank N. Vroman - Cedarburg WI
Chia-Lin Chu - Brookfield WI
Bradly S. Moersfelder - Waukesha WI
Michael A. Gill - Oconomowoc WI
Karl R. Voss - Wauwatosa WI

Quad/Tech, Inc. - Sussex WI

G01N 2147
G01N 2188
G06F 1500

364526

A method for monitoring color of a printed image printed on a substrate, the method comprising the steps of: positioning a camera assembly to receive light reflected from the printed image on the substrate, the camera assembly including a structure for producing a signal; transmitting the signal from the camera assembly to a computer; and processing the signal in the computer to correct for the effects of scattered light reflected from the printed image.

61782548, Jan 23, 2001

May 29, 1998

9/087475

Jeffrey P. Rappette - Waukesha WI
John C. Seymour - Jefferson WI

Quad/Graphics, Inc. - Sussex WI

G06K 900

382112

A method for monitoring the color quality of color patches printed on a web is disclosed. The method includes the steps of using an imaging device to receive light reflected from the printed image on the substrate to produce a signal. The signal is transmitted from the imaging device to a computer and processed in the computer. Processing the signal in the computer includes the steps of digitizing the signal to produce a digitized array of pixels, each pixel having an associated color value, determining a portion of the pixels within the digitized array corresponding to the color patch, determining an acceptable range of color values for the pixels in the portion of the pixels, determining for each pixel in the portion of pixels whether the color value is within the acceptable range, and computing an aggregate color value for the color patch by averaging the color values of each pixel in the portion of pixels including only those color values within the acceptable range.

56894252, Nov 18, 1997

Apr 27, 1995

8/429910

Jeffrey W. Sainio - Glendale WI
John C. Seymour - Jefferson WI
Jeffrey Paul Rappette - Waukesha WI
Chia-Lin Chu - Brookfield WI

Quad/Tech, Inc. - Sussex WI

G06F 1900

36446903

A control system is disclosed for controlling misregistration between the colors of an image printed on a web. The system includes an imaging device such as a camera or group of cameras, a processor, and image conversion circuits coupled to the processor. The system detects print color misregistration based upon the signals produced by the imaging device as a result of scanning the printed image. The conversion circuits convert the signals to signals usable by the processor to determine the color densities of the various colors within the image. These on-press color densities are compared with reference color densities stored in a memory of the processor, wherein the reference color densities may be generated from a source such as the printing plates used to print the image for which misregistration is being monitored. Based upon the phase correlation of the on-press images with the reference images, a processor operates to produce registration offset values between the printed colors and controls a print controller which adjusts the print units such that the colors of the printed image are placed into registration.