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1. (WO2018102633) A SYSTEM AND METHOD FOR LASER MARKING SUBSTRATES

Pub. No.:    WO/2018/102633    International Application No.:    PCT/US2017/064115
Publication Date: Fri Jun 08 01:59:59 CEST 2018 International Filing Date: Sat Dec 02 00:59:59 CET 2017
IPC: B41M 5/26
B41J 2/435
B41J 2/44
B41J 2/47
Applicants: VIDEOJET TECHNOLOGIES INC.
Inventors: KUECKENDAHL, Peter, J.
RYAN, Daniel, J.
Title: A SYSTEM AND METHOD FOR LASER MARKING SUBSTRATES
Abstract:
A laser marking system comprises at least one controller to control an array of optical devices, between a laser source and a scan head. The array applies a selected pattern of portions of the received spatial profile of the laser beam to the substrate to achieve a second intensity different from the first intensity of laser beam at a rate of power deposition relative to a rate of thermal diffusion in the substrate for a predetermined time interval to thermally heat locations of the substrate with the selected pattern of the portions. The second intensity effectuates carbonization of materials of the substrate to create a mark without ablation.