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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.:

US 4631609 B1

PDFFull Text
Date of Patent:
Dec. 23, 1986

Filed:

Feb. 16, 1984

Stretched surface recording disk substrate

Applicant:
Inventors:

Leif O Erickson, Hudson, WI (US);

Vurnen J Leonard, Minneapolis, MN (US);

Assignee:

Minnesota Mining and Manufacturing Company, St. Paul, MN (US);

Attorneys:

Sell; Donald M.

Smith; James A.

Anderson; David W.

Primary Examiner:

Stuart N Hecker

Assistant Examiner:

Benjamin E Urcia

Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360135 ;
Abstract

A stretched surface recording disk includes an annular substrate to which are adhesively attached magnetic recording films covering each major surface of the substrate. The substrate has annular ridges adjacent its inner and outer diameters which support the film above and parallel to each major surface and film attachment surfaces adjacent the ridges which are radiused an amount sufficient to place the adhesive in compression, preferably about 0.030 inches (0.80 mm).

Find Patent Forward Citations

Erickson, Leif. (1986). Stretched surface recording disk substrate (U.S. Patent No. 4631609). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4631609

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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