The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 09, 2002
Filed:
Jun. 12, 2001
Applicant:
Inventor:
Kenichi Hayashi, Kanagawa, JP;
Assignee:
Sumitomo Heavy Industries, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/435 ; B41J 2/00 ;
U.S. Cl.
CPC ...
B41J 2/435 ; B41J 2/00 ;
Abstract
An object to be marked is prepared. A laser beam of a wavelength that is transmitted by the material from which this object to be marked is formed is focused on the inner portion of said object to be marked, using an f&thgr;lens. A mark is formed in the region of the object to be marked where the laser beam is focused. The mark is positioned inside the object to be marked and does not extend to the surface thereof. Therefore, generation of dirt caused by marking, rupturing of the object to be marked, and the like, can be prevented.