Patent · US Expired

Lifting drive system for an automatic pile changing device

US6142463A · kind A · utility

5Cited by

3References

14Claims

0Family size

Assignee

MAN Roland Druckmaschinen AG · DE

Inventors

Harmut Leichnitz · Mühlheim, DE
Michael Dotzert · Friedrichsdorf, DE

Key dates

Filing date	Aug 18, 1998
Grant date	Nov 7, 2000
Priority date	—
Expiry date	Aug 18, 2018

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB65H2801/21
WIPO fieldHandling
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.