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. 05, 1985
Filed:
Mar. 08, 1983
Applicant:
Inventor:
Gilbert D Springer, Fremont, CA (US);
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
346 745 ;
Abstract
Apparatus for producing a magnetic image in a magnetic image storage medium. The apparatus includes a thin-film magnetic web with a pole-defining face and a second thin-film blanket magnetically spaced from the first magnetic web and having a second surface defining a second pole face. Spaced from the pole faces is a diamagnetic spacer which forms a special back gap in the magnetic circuit. An electrical coil sandwiched between the two magnetic materials induces flux in them. The spacer may extend normal to the flux path beyond the effective flux paths otherwise existing in the web and blanket.