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:
Jun. 27, 1995
Filed:
May. 26, 1994
Raymond C Srail, Parma, OH (US);
Richard A Glover, Brookpark, OH (US);
Thomas R Szczepanski, North Royalton, OH (US);
Eric M Weissman, Chagrin Falls, OH (US);
Frederic W Kunig, Akron, OH (US);
RJF International Corporation, Brecksville, OH (US);
Abstract
A process and apparatus for permitting the magnetization of flexible hard magnetic materials in the form of sheets or strips, such as magnetic rubber, wherein opposing arrays formed from alternating magnetic disks and flux conducting elements are use in sets of two with opposing polar moments such as to induce a magnetic flux in the gap between the discs. The width of the magnetic disk and flux conducting elements, respectively, are selected to optimize the magnetic pull strength of the material. At the array ends are flux conducting elements that are about 1/2 (i.e., from about 0.25 to about 0.75, and preferably from about 0.4 to 0.6) of the width of the internal flux conducting elements. A material to be magnetized is passed between the array sets in contrast with both disks and consequently imprinted with magnetic poles. The magnetized properties of the material is enhanced by passing the material through a second set of arrays which are axially offset with respect to the first set of arrays. This enhances the residual induction of the sample, the shape of the Br.sup.2 versus distance curve, and significantly improves the pull strength of the material. A device is provided for the production of the material, and further can be used without modification to imprint nontraversing magnetization by biasing the material to one of the arrays of the second, i.e. exiting, set of arrays.