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:
Mar. 28, 2000
Filed:
Nov. 10, 1997
Applicant:
Inventors:
Assignee:
Alps Electric Co., Ltd., Yokohama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B28B / ;
U.S. Cl.
CPC ...
264293 ; 264319 ; 264321 ; 425363 ; 425374 ;
Abstract
A roller stamp includes a stamp case and a stamp roller mounted to the stamp case for rotation. The stamp roller is made of foamed polyolefin having pores capable of being impregnated with ink. A stamp pattern is formed on the stamp roller after the stamp roller is mounted to the stamp case. After the stamp roller is mounted to the stamp case, a stamp pattern is formed on the stamp roller by using a thermal head to selectively heat and close the pores in accordance with the stamp pattern.