Magnetic recording element and method for making same

Details Magnetic recording element and method for making same Magnetic recording element and method for making same

1975-07-17

1977-06-28

Weiffenbach, Cameron K.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

427130, 428480, 428500, 428521, 428523, 428539, 428900, B05D 512, B32B 516

Patent

active

040326829

ABSTRACT:
An element for magnetic recording is comprised of a substrate or support coated on one of its surfaces with one or more magnetic layers comprising a dispersion of magnetizable particles in a binder. At least one of these magnetic layers has a porous structure formed by precipitation of at least part of the binder in the form of fine particles, with air included between said particles. Flexible magnetic tapes having such porous coatings are practically free from transverse incurvature, and have an excellent aptitude for calendering.

REFERENCES:
patent: 3216846 (1965-11-01), Hendricx et al.
patent: 3240621 (1966-03-01), Flower, Jr. et al.
patent: 3398011 (1968-08-01), Neirotti et al.
patent: 3437510 (1969-04-01), Diaz
patent: 3473960 (1969-10-01), Jacobson et al.
patent: 3634137 (1972-01-01), Akashi
patent: 3761311 (1973-09-01), Perrington et al.

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