Patents Assigned to Chesley F. Carlson Company
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Patent number: 4989032Abstract: A phase-controlled, multi-color light is disclosed for proofing of colors before a job is run on a printing press. A controlled manipulation of the spectral intensity of red, green and blue light as exposed through various flats produce specific colors in proofing material. The proper exposure parameters or data are keyed into a computerized control which includes a number of printing process memories with each memory accepting a number of flats or films with a specific response for a given printing condition. This permits storage of frequencyly used conditions as well as modifications as desired. The color palette is also operator programmed. With such programming the combining of spectral values will result in a specific combined spectral value to create a specific color in the proof. Because of this procedure only one exposure is required for each of the cyan, magenta, yellow and black exposures to obtain the position and acceptance color proof of the color layout.Type: GrantFiled: May 16, 1989Date of Patent: January 29, 1991Assignee: Chesley F. Carlson CompanyInventors: Frank A. Hull, H. Brent Archer
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Patent number: 4941746Abstract: An automatic scanning densitometer which is self calibrating and accurately measures highlight density, shadow density and tonal distribution of midtones occurring in the subject matter of the photograph to be reproduced. A reflection densitometer is disclosed which in one or more scans identifies and measures first the highlight and shadow densities and the tonal distribution of the subject matter to be reproduced, as opposed to the background of the photo. The instrument automatically determines the size of the original and, with an input to the device, the size of the window in which the original is to be reproduced to provide enlargement or reduction. Measurement of density values are uniquely stabilized and with the use of a monolithic sensor on a single substrate the entire image is processed and measured, not just target areas which must be manually measured or aligned with an apertured scanning bar.Type: GrantFiled: December 14, 1987Date of Patent: July 17, 1990Assignee: Chesley F. Carlson CompanyInventors: Frank A. Hull, H. Brent Archer, Curt Frederick
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Patent number: 4855793Abstract: A step and repeat system which does not require restripping of an image to reposition it either vertically or horizontally. The image is secured to a substrate which is provided with two holes spaced a distance apart equal to the desired horizontal stepping distance. The substrate, with or without stripping tabs, is secured to fraction spacers having two base pins which fit in uniformly spaced holes on a horizontal stepping strip and having fraction pins which can be selected to precisely match the horizontal stepping distance. The horizontal stepping strip with attached substrate and image can be vertically repositioned on a step and repeat board to a second spaced vertical position with the use of interfacing holes on the stepping strip and the step and repeat board, register control being maintained with vertical position pins sized to match the holes. Horizontal stepping can be achieved with a change in fraction spacers.Type: GrantFiled: October 9, 1987Date of Patent: August 8, 1989Assignee: Chesley F. Carlson CompanyInventor: Chesley F. Carlson
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Patent number: 4365500Abstract: A web bending fixture to bend lithographic plates used in web offset printing and production. Precise bends are created by a precision machine tool fixture. The fixture utilizes continuously supported eccentric camming members, one on each end of the fixture, each supported by a plurality of split bearings within which the camming members rotate. After the lithographic plate is precisely aligned with unique registration means and immobilized, the camming members, are moved into position and, rotating within the bearings, form the leading and trailing edges of the plate around precisely positioned and fixed anvils.Type: GrantFiled: January 30, 1981Date of Patent: December 28, 1982Assignee: Chesley F. Carlson CompanyInventor: Roger Klukow
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Patent number: RE31938Abstract: A web bending fixture to bend lithographic plates used in web offset printing and production. Precise bends are created by a precision machine tool fixture. The fixture utilizes continuously supported eccentric camming members, one on each end of the fixture, each supported by a plurality of split bearings within which the camming members rotate. After the lithographic plate is precisely aligned with unique registration means and immobilized, the camming members, are moved into position and, rotating within the bearings, form the leading and trailing edges of the plate around precisely positioned and fixed anvils.Type: GrantFiled: November 23, 1983Date of Patent: July 9, 1985Assignee: Chesley F. Carlson CompanyInventor: Roger Klukow