Lifting drive system for an automatic pile changing device

Details Lifting drive system for an automatic pile changing device Lifting drive system for an automatic pile changing device

1998-08-18

2000-11-07

Walsh, Donald P.

Sheet feeding or delivering

Feeding

Pack holders

271158, 271157, 271147, B65H 130

Patent

active

061424633

ABSTRACT:
A lifting device for an automatic pile changing device of a sheet-processing machine, in particular for a sheet-fed offset printing machine with a non-stop feeder, having a main pile-carrying assembly and an auxiliary pile-carrying assembly which can be raised and lowered by means of a motor and an upstream drive unit. The invention allows simple and cost effective synchronization of the main pile-carrying assembly and of the auxiliary pile-carrying assembly within given tolerances. According to the invention, this is achieved by switching signals of equal duration determined by a common control unit coordinating two drive units. At least one of the drive units is assigned parameters that enable this synchronization.

REFERENCES:
patent: 4021710 (1977-05-01), Fichte et al.
patent: 5556252 (1996-09-01), Kuster
patent: 5626335 (1997-05-01), Radwanski et al.

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