Method of reconnecting drive shaft sections in phase in a web pr

Details Method of reconnecting drive shaft sections in phase in a web pr Method of reconnecting drive shaft sections in phase in a web pr

1986-02-12

1987-11-17

Eickholt, E. H.

Printing

Antismut device

Anti-offset material application

101219, 101248, 101226, B41F 504

Patent

active

047065664

ABSTRACT:
A method of makeready for a web printing press of the type wherein a web of paper or the like is fed through a print station and a perforating or like processing station driven by first and second drive shaft sections, respectively, which are normally held interconnected via a clutch for joint rotation and which are declutched to allow the print station to operate independently of the processing station. For reconnecting the two drive shaft sections in phase, the method comprises counting the number of revolutions of the first drive shaft section after the same has been declutched from the second drive shaft section, as by a CPU connected to receive electric pulses representative of the revolutions of the first drive shaft section. Upon reception of a clutch engage command from a manually actuable control panel, the CPU computes the additional number of revolutions required for the first drive shaft section before being reconnected in phase to the second drive shaft section. The CPU puts out a signal for causing the reengagement of the clutch when the first drive shaft section completes the above computed additional number of revolutions.

REFERENCES:
patent: 4109574 (1978-08-01), Forster et al.
patent: 4264957 (1981-04-01), Pautzke
patent: 4441424 (1984-04-01), Naumann

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