US 2004/0072029 A1 · Steel-on-steel and compliant-on-steel calendered magnetic recording media, and methods of making

Abstract

A method for producing a magnetic recording medium includes applying a non-magnetic back coat to a substrate, applying a magnetic front coat to the substrate, in-line calendering the coated substrate using opposed rolls, at least one of the rolls being a generally compliant roll, and off-line calendering the substrate using opposed, generally non-compliant rolls. The off-line calendering optionally includes steel-on-steel calendering and the method optionally includes only one off-line calendering pass and only one in-line calendering pass. Calendering the coated substrate optionally occurs using at least one nip, the calendering including calendering the coated substrate through a final nip including generally non-compliant rolls. Other methods, and magnetic recording media produced by such methods, also are disclosed.

Claims20

Dependent claims

A method for producing a magnetic recording medium, comprising:

applying a non-magnetic back coat to a substrate;
applying a magnetic front coat to the substrate;
in-line calendering the coated substrate using opposed rolls, at least one of the rolls being a generally compliant roll;
and
off-line calendering the coated substrate using opposed, generally non-compliant rolls.

2 more elements

Dependencies are inferred from the claim text.

Steel-on-steel and compliant-on-steel calendered magnetic recording media, and methods of making

Life of this patent

Steel-on-steel and compliant-on-steel calendered magnetic recording media, and methods of making

Life of this patent

Abstract

Claims20