Patent · US Active

Marking a workpiece with a data matrix code by means of a laser beam

US10005305B2 · kind B2 · utility

1Cited by

2References

13Claims

0Family size

Assignee

TRUMPF Werkzeugmaschinen GmbH + Co. KG · DE

Inventors

Wolf Wadehn · Nußdorf, DE
Korbinian Weiss · Ditzingen, DE
Markus Zimmermann · Riehen, CH

Key dates

Filing date	Dec 2, 2016
Grant date	Jun 26, 2018
Priority date	—
Expiry date	Feb 13, 2037

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB23K26/361
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

This disclosure relates to methods and apparatuses for marking a data matrix code in the form of an n*m cell matrix of light and dark cells, which respectively consist of a light or dark s*t pixel matrix, on a workpiece by a laser beam, wherein a laser processing unit directs the laser beam onto the workpiece, scans, pixel row by pixel row, the workpiece region to be marked, respectively with a constant marking speed and alternately in opposite directions, and wherein the light pixels and/or the dark pixels are marked on the workpiece during the scan by temporarily switching on the laser beam, wherein the laser processing unit is guided from an already scanned pixel row along a curve having a diameter of which is at least two times the pixel row spacing, to the next pixel row to be scanned.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.