Title:
IMPROVEMENTS IN OR RELATING TO LASER MARKING
Document Type and Number:
WIPO Patent Application WO/2020/120934
Kind Code:
A3
Abstract:
There is provided a method of calibrating a laser marking system of the type operable to mark a substrate moving relative to the marking system at a substrate speed.The marking system includes a plurality of emitters, each emitter operable to emit light on to a substrate for marking.The emitted light is controlled in response to a variable marking setting.The method includes the steps of activating the emitters to mark a series of block images at a range of different marking settings and a range of different substrate speeds,determining the average optical density of each marked block, identifying the marking settings that correspond most closely to a selected optical density value for each substrate speed,and thereby determining a calibration relationship between marking setting and substrate speed. An apparatus and system operable to this method are provided.
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Inventors:
PHILLIPS TRISTAN (GB)
CRIDLAND JOHN (GB)
CRIDLAND JOHN (GB)
Application Number:
PCT/GB2019/053427
Publication Date:
July 23, 2020
Filing Date:
December 04, 2019
Export Citation:
Assignee:
DATALASE LTD (GB)
International Classes:
B41J2/45; B23K26/00; B41J29/393; G06K1/12; H04N1/50
Foreign References:
| US20110102537A1 | 2011-05-05 | |||
| US20110280589A1 | 2011-11-17 | |||
| US5323179A | 1994-06-21 |
Attorney, Agent or Firm:
WILSON GUNN (MANCHESTER) (GB)
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