Device for the controlled infeed of a web to a printing machine,

Details Device for the controlled infeed of a web to a printing machine, Device for the controlled infeed of a web to a printing machine,

1988-09-12

1990-01-30

Hail, III, Joseph J.

Advancing material of indeterminate length

With material-responsive control means

To regulate longitudinal movement of material

226 44, 242 7551, B65H 23185

Patent

active

048968080

ABSTRACT:
In a device and a method for the regulation of the controlled infeed of web material to a printing machine, a control component of a differential gear placed ahead of a web drive roller is driven by a second continuously adjustable drive by the main drive of the printing machine. Control of the second drive takes place via a servomotor which is connected by a control circuit with a tensioning roller deflectable by the paper web. During control the voltage signal generated by the deflection of the tensioning roller is converted parallel into a voltage signal characterizing the position of the tensioning roller and into a voltage signal weighting the direction of movement. Then these signals are linked into a single output signal and are routed to the servomotor.

REFERENCES:
patent: 2906143 (1959-09-01), Musser
patent: 2946087 (1960-07-01), Haroldson et al.
patent: 3539085 (1970-11-01), Anderson et al.
patent: 3724733 (1973-04-01), Schaffer et al.
patent: 3811304 (1974-05-01), Gorker
patent: 3905533 (1975-09-01), Corse
patent: 3912145 (1975-10-01), Mezhoter
patent: 4011976 (1977-03-01), Greer
patent: 4407331 (1983-10-01), Rehling et al.

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