Title:
BAR CODE MARKING METHOD
Document Type and Number:
Japanese Patent JP2562423
Kind Code:
B2
Abstract:
PURPOSE: To provide such marking method of bar code as enables bar code parts to be clearly identified from its background so that the read-out ratio is improved.
CONSTITUTION: In the marking method in which a bar code 2 is formed on a metallic material 1 by the scanning of a laser beam 4; first, the bar code part 2 is formed by making the peak value of the laser beam output 4 the same or slightly larger than the background part and making the repeated frequency high so as to evaporate and discolorate the metallic surface. Next, the background part 3 of the bar code is formed by making the repeated frequency of the laser beam output 4 low and evaporating the metallic surface.
Inventors:
NISHIO NORIHIRO
HANYUDA TAKASHI
NAKAGAWA HIROSHI
HANYUDA TAKASHI
NAKAGAWA HIROSHI
Application Number:
JP31553094A
Publication Date:
December 11, 1996
Filing Date:
November 25, 1994
Export Citation:
Assignee:
UEDA NIPPON MUSEN KK
NITSUSHIN BOSEKI KK
NITSUSHIN BOSEKI KK
International Classes:
B41J3/01; B23K26/00; B41J2/00; B41J2/44; G06K1/12; (IPC1-7): B23K26/00; B41J2/44; B41J3/01; G06K1/12
Domestic Patent References:
| JP5253678A | ||||
| JP56160892A |