Method and apparatus for anilox roller scoring prevention

• US 6,371,018 B1
• Filed: 11/08/2000
• Issued: 04/16/2002
• Est. Priority Date: 04/04/2000
• Status: Expired due to Fees

• Current Assignee: AIT Israel Advanced Technology Limited
• Original Assignee: Karat Digital Press LP
• Inventors: Petrov, Vladimir, Halfon, Yossef, Korem, Aharon, Bronstein, Refael, Nacash, David
• Primary Examiner(s): EICKHOLT, EUGENE H
• Application Number:
  US09/708,005
• Time in Patent Office: 524 Days
• Field of Search: 101/212, 101/211, 101/216, 101/219, 101/248, 101/483, 101/484, 101/401.1, 382/195, 382/199, 345/581, 345/582, 345/589, 345/345, 358/1.1, 358/1.4
• US Class Current: 101/211
• CPC Class Codes: B41M 1/04 Flexographic printing
• CPC Class Codes: B41M 1/06 Lithographic printing
• CPC Class Codes: B41M 2205/16 Correction processes or materials
• CPC Class Codes: B41N 2207/02 Top layers
• CPC Class Codes: B41N 7/06 for inking rollers construction of inking rollers B41F31/26

Abstract

The present invention is directed to various apparatuses and methods for prevention of anilox roller scoring and compensation for anilox scoring ink marks, focusing on the anilox roller. According to some embodiments of the present invention, the uneven ink distribution pattern may be treated by an addition of an ink distribution mechanism. According to other embodiments of the present invention, image data modification methods are used for compensation for the scoring marks.

Claims

1. In a printing press having an anilox roller, a method comprising:

printing an image from original plate exposure data;

measuring geometrical properties of a scoring mark in said image;

modifying said original plate exposure data from a correction table including said measured geometrical properties of said scoring mark; and

imaging a printing plate of said printing press using said modified plate exposure data.

2. The method of claim 1 wherein said modifying comprises:

altering pixel values in said original plate exposure data that correspond to said geometrical properties of said scoring marks.

3. The method of claim 1, wherein said modifying comprises:

altering scanning line values in said original plate exposure data that correspond to said geometrical properties of said scoring marks.

4. The method of claim 1, wherein said modifying comprises:

skipping at least portions of scanning lines in said original plate exposure data that correspond to said geometrical properties of said scoring marks.