Apparatus and method for controlling a plurality of continuous p

Details Apparatus and method for controlling a plurality of continuous p Apparatus and method for controlling a plurality of continuous p

1989-01-17

1990-02-06

Eickholt, Eugene H.

Printing

Processes

Position or alignment

101248, 101181, 364469, 226 4, 226 29, 226111, B41F 134, G06F 1546

Patent

active

048980943

ABSTRACT:
An apparatus and method for controlling a plurality of connected continuous paper printing machines connected in series prevent difference in rotational speeds of the connected printing machines from causing the paper between the printing machines from piling up or tearing. Signal generators count the number of sheets of continuous paper entering each printing machine. The difference in the number of sheets entering each printing machine is calculated and compared to preset upper and lower limits. If an upstream printing machine turns faster than a downstream printing machine, slack will develop in the paper between the printing machines, and the difference between the sheets entering the upstream printing machine and sheets entering the downstream printing machine will be a (+) value. When a preset upper limit is reached, a controller will temporarily stop the upstream printing machine until the downstream printing machine takes up all the slack. Similarly, if the downstream printing machine turns faster than the upstream printing machine, paper between the printing machines will become taut, and the difference between sheets entering the upstream printing machine and sheets entering the downstream printing machine will be a (-) value. When a preset lower limit is reached, another controller will temporarily stop the downstream printing machine until the tautness is relieved.

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patent: 4757930 (1988-07-01), Ditto
patent: 4781317 (1988-11-01), Ditto
patent: 4805111 (1989-02-01), Steidel
patent: 4839814 (1989-06-01), Steidel

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