Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1990-05-31
1992-03-10
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
250557, G01N 2186, G06K 1500
Patent
active
050952196
ABSTRACT:
For the control of a cutting to the correct design length, particularly to the correct print image, of continuously conveyed webs of material by means of a cutter unit, the web of material is provided with a bar code which is detected in contactless manner at least for measuring speed and acceleration by means of a sensor. Each bar of the bar code is converted into a signal which may be multiplied in a signal conversion unit. By this means a high degree of precision of the cutting position is obtained.
REFERENCES:
patent: 3919560 (1975-11-01), Nopper
patent: 4176944 (1979-12-01), Payrhammer
patent: 4600841 (1986-07-01), Tokuno et al.
patent: 4857745 (1989-08-01), Gough
patent: 4877323 (1989-10-01), Stillwagon
Laumann Werner
Schmidt Thomas
Allen S.
BHS-Bayerische Berg -,Hutten- und Salzwerke AG
Nelms David C.
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