Control device for paper travelling tension and paper cutting po

Details Control device for paper travelling tension and paper cutting po Control device for paper travelling tension and paper cutting po

1990-08-30

1991-10-01

Eickholt, Eugene H.

Printing

Rolling contact machines

Rotary

101228, 226 45, 226109, 226195, 364471, B41F 504

Patent

active

050522965

ABSTRACT:
This invention relates to a control device for adjusting the travelling tension and the cutting position of printing paper in a printing apparatus. The control device automatically controls the travelling tension of the paper webs within a reference control range, which depends on the number of the paper webs, when the printing machine is driven at a constant speed or when changing speeds slowly. This control device also automatically corrects over-stretching or loosening of the travelling paper webs due to the resistance or the inertial force of guide rollers when the printing machine is driven to change speeds quickly such as at the start or end of the printing operation.

REFERENCES:
patent: 3591279 (1971-07-01), Gardner
patent: 4007866 (1977-02-01), Traise
patent: 4011975 (1977-03-01), Brown, Jr.
patent: 4078487 (1978-03-01), Mccomb
patent: 4750659 (1988-06-01), Maier et al.
patent: 4896605 (1990-01-01), Schroder
patent: 4898094 (1990-02-01), Doumoto et al.

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