Browse Prior Art Database

Disk With Magnetic Record Coating

IP.com Disclosure Number: IPCOM000074695D
Original Publication Date: 1971-May-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Vogel, MJ: AUTHOR

Abstract

A disk is provided with a very smooth magnetic coating by means of a transfer process.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 1

Disk With Magnetic Record Coating

A disk is provided with a very smooth magnetic coating by means of a transfer process.

The smooth surface of a temporary substrate - e.g., of polished steel, chromium plated glass, metallized or plain polyester - is coated with thermoplastic or thermosetting magnetic ink. The magnetic coating is overcoated with a thermoplastic or thermosetting adhesive, preferably BUTVAR* 876, a polyvinyl butyral. This overcoating is placed into contact with the disk. Pressure and heat are applied between this disk and the temporary substrate, so that the adhesive strongly adheres to the disk. Later the disk. Later the temporary substrate can be removed.

Pressure can be applied by stamps or rollers. Both sides of the disk can be coated. * Trademark of Monsanto Company

1