Rotary printing press and method for adjusting a cylinder thereof

• US 8,534,194 B2
• Filed: 09/28/2007
• Issued: 09/17/2013
• Est. Priority Date: 10/23/2006
• Status: Active Grant

• Current Assignee: Bobst Bielefeld GmbH (JBF Finance SA)
• Original Assignee: Bobst Bielefeld GmbH (JBF Finance SA)
• Inventors: Whitelaw, Gordon, Grautoff, Georg, Kckelmann, Andreas
• Primary Examiner(s): CULLER, JILL E
• Application Number:
  US12/446,738
• Publication Number:
  US 20100018419A1
• Time in Patent Office: 2,181 Days
• Field of Search: 101/486, 101/DIG.46
• US Class Current: 101/486
• CPC Class Codes: B41F 13/025 Registering devices
• CPC Class Codes: B41F 13/08 Cylinders
• CPC Class Codes: B41F 13/12 Registering devices
• CPC Class Codes: B41F 13/14 with means for displacing the cylinders
• CPC Class Codes: B41F 13/34 Cylinder lifting or adjusting devices
• CPC Class Codes: B41F 13/38 electrically or magnetically operated
• CPC Class Codes: B41F 31/30 Arrangements for tripping, lifting, adjusting, or removing inking rollers; Supports, bearings, or forks therefor
• CPC Class Codes: B41F 31/301 Devices for tripping and adjusting form rollers
• CPC Class Codes: B41F 33/00 Indicating, counting, warning, control or safety devices arrangements of counting devices in platen presses B41F1/00 , B41F1/58; arrangements of counting devices in cylinder presses B41F3/84; ink supply or metering devices B41F31/02
• CPC Class Codes: B41F 33/0027 Devices for scanning originals, printing formes or the like for determining or presetting the ink supply
• CPC Class Codes: B41F 33/0036 Devices for scanning or checking the printed matter for quality control
• CPC Class Codes: B41F 33/0045 for automatically regulating the ink supply
• CPC Class Codes: B41F 33/0081 Devices for scanning register marks
• CPC Class Codes: B41F 5/18 using one impression cylinder co-operating with several forme cylinders
• CPC Class Codes: B41F 5/20 specially adapted for proof printing
• CPC Class Codes: B41F 5/24 for flexographic printing
• CPC Class Codes: B41F 7/10 using one impression cylinder co-operating with several transfer cylinders for printing on sheets or webs, e.g. satellite-printing units
• CPC Class Codes: B41F 7/18 specially adapted for proof printing
• CPC Class Codes: B41F 9/04 specially adapted for proof printing
• CPC Class Codes: G01B 11/24 for measuring contours or curvatures

Abstract

A method of adjusting a roller (18) in a rotary printing press (10), includes the steps of a) mounting the roller (18) in a preparation rack (24) so as to be rotatably supported therein, b) scanning the peripheral surface of the roller, thereby to detect a topography of the roller surface, c) deriving set data for the adjustment of the roller from the topography, and storing the set data, d) mounting the roller in the printing press (10), and e) adjusting the roller in accordance with the set data.

Claims

1. A scanning system for measuring a surface profile of a rotating cylinder, the scanning system comprising:

a follower roll having a peripheral surface, the follower roll being movably supported to roll over the rotating cylinder;

a contactless distance sensor fixedly mounted at a distance from the peripheral surface of the follower roll in a position opposite to the rotating cylinder, the contactless distance sensor configured to measure a position of the peripheral surface of the follower roll; and

a control unit configured to derive and to output the surface profile of the rotating cylinder based on the position of the peripheral surface of the follower roll measured by the contactless distance sensor.

2. The scanning system according to claim 1, wherein the follower roll comprises a peripheral surface made of metal, and the distance sensor is an eddy current sensor.

3. The scanning system according to claim 1, wherein the rotating cylinder is provided as part of a rotary printing press.

4. A rotary printing press comprising a rotating cylinder and a scanning system configured to measure a surface profile of the rotating cylinder, the rotary printing press comprising:

the rotating cylinder including a printing pattern;

a follower roll positioned and configured to roll over the rotating cylinder and having a peripheral surface;

a contactless eddy current distance sensor mounted at a distance from the peripheral surface of the follower roll in a position opposite to the rotating cylinder, the contactless eddy current distance sensor configured to measure a position of the peripheral surface of the follower roll; and

a control unit configured to derive and to output the surface profile of the rotating cylinder based on the position of the peripheral surface of the follower roll measured by the contactless distance sensor.

5. A rack for mounting printing plates on a printing cylinder or for creating a printing pattern on the surface of the printing cylinder, the printing cylinder having a surface profile, the rack being configured to rotatably support the printing cylinder and comprising:

a detector configured to detect a reference mark on the printing cylinder;

a follower roll positioned and configured to roll over the rotating cylinder and having a peripheral surface;

a contactless eddy current distance sensor mounted at a distance from the peripheral surface of the follower roll in a position opposite to the rotating cylinder, the contactless eddy current distance sensor configured to measure a position of the peripheral surface of the follower roll; and

a control unit configured to derive and to output the surface profile of the rotating cylinder based on the position of the peripheral surface of the follower roll measured by the contactless distance sensor.

6. A scanning system for measuring a surface profile of a rotating cylinder of a rotary printing press, the scanning system comprising:

a follower having a peripheral surface, the follower being movably supported to move over the rotating cylinder;

a contactless distance sensor fixedly mounted at a distance from the peripheral surface of the follower in a position opposite to the rotating cylinder, the contactless distance sensor configured to measure a position of the peripheral surface of the follower; and

a control unit configured to derive and to output the surface profile of the rotating cylinder based on the position of the peripheral surface of the follower measured by the contactless distance sensor.