Browse Prior Art Database

Magnetic Ink Mixing

IP.com Disclosure Number: IPCOM000042975D
Original Publication Date: 1984-Jun-01
Included in the Prior Art Database: 2005-Feb-04
Document File: 2 page(s) / 72K

Publishing Venue

IBM

Related People

Blazon, WH: AUTHOR [+3]

Abstract

A magnetic ink, useful in coating a flexible substrate while manufacturing magnetic recording media, is subjected to an in-line shear force, as the stream of particle slurry joins the stream of polymeric binder. A tank 10 of magnetic-particle/crosslinker slurry, and a tank 11 of polymeric binder flow into a shear station 12, where the two fluid flows are blended by shearing action. The thus-formed ink then flows to a substrate coating head (not shown). Fig. 2 shows the detail of the shear station in Fig. 1. A shear blade or paddle 20 is driven by gas motor 21. The plane of blade 20 is located at the center, or just below center, defined by the center lines of conduits 22 and 23. This critical blade position insures proper shearing, mixing and control of the coating ink viscosity. Fig. 3 shows four alternate forms of blade 20.

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Magnetic Ink Mixing

A magnetic ink, useful in coating a flexible substrate while manufacturing magnetic recording media, is subjected to an in-line shear force, as the stream of particle slurry joins the stream of polymeric binder. A tank 10 of magnetic- particle/crosslinker slurry, and a tank 11 of polymeric binder flow into a shear station 12, where the two fluid flows are blended by shearing action. The thus- formed ink then flows to a substrate coating head (not shown). Fig. 2 shows the detail of the shear station in Fig. 1. A shear blade or paddle 20 is driven by gas motor 21. The plane of blade 20 is located at the center, or just below center, defined by the center lines of conduits 22 and 23. This critical blade position insures proper shearing, mixing and control of the coating ink viscosity. Fig. 3 shows four alternate forms of blade 20.

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