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:
Apr. 19, 1994
Filed:
Oct. 03, 1990
Applicant:
Inventor:
Ryutaro Hayashi, Saitama, JP;
Assignee:
Pioneer Electronic Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
3692755 ; 3692751 ; 3692754 ; 369286 ; 3461351 ;
Abstract
An optical information record carrier consists of upper and lower optical disks maintained separate from each other by an annular spacer juxtaposed to the outer periphery of the surfaces of the optical disks facing one another. The spacer is glued to the optical disks to produce a carrier with spaced optical disks and an air gap between the disks interior of the annular spacer. To assure sufficient adhesive will remain between the spacer surfaces and their facing optical disk surfaces as these components are squeezed together during the assembly process, one of the spacer of the optical disks is provided with a projection or recess.