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Magnetic Media Protective Coating

IP.com Disclosure Number: IPCOM000048928D
Original Publication Date: 1982-Apr-01
Included in the Prior Art Database: 2005-Feb-09

Publishing Venue

IBM

Related People

Authors:
Ingraham, AP Rohen, JE Shay, RJE Wallace, JE [+details]

Abstract

Magnetic stripe record 1 is provided with a thin, chemically stable, smooth, protective layer 2 that overlies the magnetic oxide stripe 3 to protect the stripe and recordings thereon from chemical and mechanical disturbance. The protective layer 2 can be formed by spray coating a material such as polytetrafluoroethylene (TEFLON*). However, preferred methods employ a thin layer of film of a polyester, such as polyethylene terephthalate (MYLAR*), for the protection layer 2 to assure a uniform thickness. The magnetic oxide 3 is coated on the film and then laminated onto card stock 4. To aid in the manufacturing process, a double layer film, consisting of layers 2 and 6, is provided. The layers can be held together either by electrostatic force, a releasable adhesive, or by weldtacking.