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Magnetic Orientation Device

IP.com Disclosure Number: IPCOM000093274D
Original Publication Date: 1967-Aug-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Fiedler, AW: AUTHOR [+3]

Abstract

The system achieves orientation in directions differing by 90 degrees in two strata of magnetic layers. The same coils and magnetic poles are used for the two orientations. The polarities of induced flux are changed to achieve the different orientation directions.

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Magnetic Orientation Device

The system achieves orientation in directions differing by 90 degrees in two strata of magnetic layers. The same coils and magnetic poles are used for the two orientations. The polarities of induced flux are changed to achieve the different orientation directions.

Element 1 is a cylindrical mold, viewed from the end. The inside of mold 1 is first coated with a fluid blend of magnetic particles, a film forming resin, and solvents and dispersants to temporarily render the blend a viscous, but fluid mass. The first layer on mold 1 becomes the outer layer of the final magnetic web.

It is desired to orient the magnetic particles in a direction perpendicular to the surface of mold 1. To achieve this, switch 3 is closed upward so that coil A generates a north polarity pole on the left as shown in the drawing with a south pole on the right. Coil B is driven so that a south pole is generated on the left as shown in the drawing with a north pole on the right. Areas 5A, 5B, 7A, and 7B are magnetically conductive pole pieces which occupy almost half of the circumference of mold 1 and which extend the length of mold 1. Rollers 5 then rotate mold 1 a complete revolution so that the entire coating on the mold is influenced in the same way by the magnetism produced. Then the solvent for the first layer on mold 1 is evaporated to thus solidify the first layer.

Mold 1 and the magnetic system are moved apart and a second fluid blend essentially identical...