# US 4,392,429 A · Multiplicative adjustment provision at an ink feed remote control device

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- Number: US 4,392,429 A
- Document ID: US4392429A
- Status: Granted
- Kind: A
- Application number: 06/328,091
- Filed: 1981-12-07
- Granted: 1983-07-12
- Earliest claimed: 1980-12-12
- Assignees: Veb Kombinat Polygraph "Werner Lamberz" Leipzig
- Inventors: Karl-Heinz Forster; Hans Johne
- Web page: https://patentgrep.com/patent/US4392429A

## CPC

- B41F 31/045: {Remote control of the duct keys}
- B41F: PRINTING MACHINES OR PRESSES (manifolding devices or office printing machines B41L)

## Abstract

A multiplicative adjustment provision at an ink feed remote control device with a servo system actuating doctor blade support elements. The servo system includes a servo drive and a set point providing section. A control system is connected to the servo system and is provided at its inputs and outputs with multiplexers. The control system includes a motor driven control circuit, a process control unit coordinating with the right sequence the motor control unit successively on the input and output side to the servo system and a first computing circuit preceding the motor control circuit. A difference forming unit has input and output connected to the process control unit and has an output connected to the first computing circuit. A switching means is connected to the difference forming unit and connected to an input multiplexer of the control system. A second computing unit is connected to the motor control unit and to the switching unit.

## Claims

### Claim 1

A multiplicative adjustment provision at an ink feed remote control device with a servo system actuating doctor blade support elements, comprising a servo system including
a set point providing section;
a control system connected to the servo system and provided at its inputs and outputs with multiplexers including
a motor control circuit;
a process control unit coordinating with the right sequence the motor control unit successively on the input and output side to the servo system;
a first computing circuit preceding the motor control unit;
a difference forming unit having input and output connected to the process control unit and having its output connected to the first computing circuit;
a switching means connected to the difference forming unit and connected to an input multiplexer of the control system; and
a second computing circuit connected to the motor control unit and to the switching means.

### Claim 2 (depends on 1)

The multiplicative adjustment provision according to claim 1,
wherein the second computing circuit comprises connected in series
a potentiometer connected to the switching means; a plus-minus switch connected to the potentiometer;
an operational amplifier connected to the plus-minus-switch and having an output;
a storage member connected to the output of the operational amplifier and to the control system.