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:
Sep. 14, 1993
Filed:
Jul. 15, 1991
John W Hogan, Minneapolis, MN (US);
Rolf W Hogan, Champlin, MN (US);
Other;
Abstract
A write-read magnetic head for write-read digital recording machines includes a write magnetic head and a read magnetic head disposed in closely spaced apart relation. Each head includes a shield formed of a ferrous containing material having an opening therein in which the primary (write or read) gap is positioned. Each head includes a magnetic core comprised of a C-shaped core element and on I-shaped core element defining the primary (write) gap. A secondary gap is defined between the I-shaped core element and adjacent wall edge downstream of the write gap. When the recording head is energized, the shields and the secondary flux reduces flux leakages towards the read gap to permit effective reading while writing.