# US 2009/0260530 A1 · Method for operating a printing press and printing press implementing the method

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- Number: US 2009/0260530 A1
- Document ID: US20090260530A1
- Status: Published application
- Kind: A1
- Application number: 12/426,312
- Filed: 2009-04-20
- Published: 2009-10-22
- Earliest claimed: 2008-04-21
- Assignees: Heidelberger Druckmaschinen AG
- Inventors: BERND SITZMANN; MARKUS UIHLEIN
- Web page: https://patentgrep.com/patent/US20090260530A1

## CPC

- B41F 35/06: for offset cylinders
- B41F 33/08: for starting or stopping operation of cylinders
- B41P 2235/24: using rolls of cleaning cloth
- B41F: PRINTING MACHINES OR PRESSES (manifolding devices or office printing machines B41L)
- B41P: INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS

## Abstract

A method for operating a printing press having a printing unit and a cleaning apparatus includes, in a first step, starting up the printing unit in order to print therewith, and in a subsequent, second step, displacing the cleaning apparatus into the printing unit running in printing operation and/or out of the printing unit running in printing operation. A printing press for implementing the method is also provided.

## Claims

### Claim 1

A method for operating a printing press having a printing unit and a cleaning apparatus, the method comprising the following steps:
in a first step, starting the printing unit to print with the printing unit; and
in a subsequent, second step, displacing the cleaning apparatus at least one of into or out of the printing unit during running of the printing unit in printing operation.

### Claim 2 (depends on 1)

The method according to claim 1, which further comprises:
moving the cleaning apparatus into an operating position within the printing unit by the displacement carried out in the second step; and
automatically re-tensioning a cleaning cloth of the cleaning apparatus after the first step and before the cleaning apparatus has reached the operating position.

### Claim 3 (depends on 2)

The method according to claim 2, which further comprises carrying out the step of re-tensioning the cleaning cloth by winding the cleaning cloth onto a spindle.

### Claim 4 (depends on 3)

The method according to claim 3, which further comprises monitoring the tension of the cleaning cloth with a monitoring device during the step of re-tensioning the cleaning cloth.

### Claim 5 (depends on 4)

The method according to claim 4, wherein the step of monitoring of the tension of the cleaning cloth by the monitoring device determines if a sensor of the monitoring device responds within a specific time period beginning with an activation of a drive of the spindle.

### Claim 6 (depends on 5)

The method according to claim 5, which further comprises interrupting the printing operation of the printing unit with the monitoring device, if the specific time period is exceeded without the sensor responding.

### Claim 7 (depends on 1)

The method according to claim 1, which further comprises monitoring the tension of the cleaning cloth with a monitoring device having a sensor.

### Claim 8 (depends on 5)

The method according to claim 5, wherein the sensor is an incremental encoder.

### Claim 9 (depends on 7)

The method according to claim 7, wherein the sensor is an incremental encoder.

### Claim 10 (depends on 1)

A printing press, comprising a printing unit and a cleaning apparatus for carrying out the method according to claim 1.