Cutting apparatus for continuous webs

Details Cutting apparatus for continuous webs Cutting apparatus for continuous webs

1980-02-19

1981-05-19

Yost, Frank T.

Cutting

With means to monitor and control operation

Including means to correct the sensed operation

83 76, 83311, 83312, 83339, 83364, 83365, 83367, 83650, B26D 136, B26D 138, B26D 520

Patent

active

042677521

ABSTRACT:
A paper sheeter for cutting two or more webs simultaneously into sheets has a rotary knife to make the cuts in desired register with marks (e.g. watermarks) carried by the web. A sensor is provided for detecting the marks on each web and a further sensor monitors the knife rotation; signals from the several sensors are fed to a control unit in which the signals from each mark sensor are compared with signals from the knife sensor to produce feed control signals for the respective web. These control signals may be applied to brakes associated with the web supply reels to vary the tension in each web; alternatively one web may be controlled by using the control signals to vary the speed ratio between the knife and pull rolls feeding the webs to the knife.

REFERENCES:
patent: 1961538 (1934-06-01), Weber
patent: 2038452 (1936-04-01), Sharkey et al.
patent: 2283096 (1942-05-01), Sandberg
patent: 3498165 (1970-03-01), Austin

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