Advancing material of indeterminate length – With material-responsive control means – To position material laterally
Patent
1979-04-19
1981-09-29
Christian, Leonard D.
Advancing material of indeterminate length
With material-responsive control means
To position material laterally
250559, 250571, B65H 2526, G01N 2186, G01V 904
Patent
active
042918251
ABSTRACT:
A system for positioning a web of material as it enters and passes through a course for treating the web, as in a printing press, is disclosed. The edges of the web are scanned by infrared sensing devices which are connected by various electrical circuits to a tilt mechanism contacting the web, and both the scanning devices and the tilt mechanism may be synchronized, or manually controlled, to direct the web through the press. A broad diameter channel of infrared radiation is utilized in the scanners. The relationship of the web to its desired path and the correcting actions of the system may be continuously read in terms of actual deviation changes on a display panel. The tilt rollers and the scanners may be automatically centered on a fixed reference point in preparing the web for its course through the press. The system includes correlation of the tramming of the tilt rollers to continued position sensing of the web by the infrared scanners.
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patent: 3966105 (1976-06-01), Curran
patent: 4003511 (1977-01-01), Schwestka
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patent: 4146797 (1979-03-01), Nakagawa
Elektronik, vol. 21, No. 6, 1972, Munchen, "Ein Optisches Wegmesgerat", G. Fritz, pp. 191-194.
Baldwin-Korthe Web Controls Inc.
Christian Leonard D.
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