Minnesota Mining and Manufacturing Company

Imation Corporation

Albena V Blagev

James G Carlson

Jeffrey T Anderson

Nelson T Rotto

Carol-Lynn Spawn

Raul Horacio Andruet

Christopher J Zwettler

Michael A Mewes

Arne Bengt Boberg

Jason Moses

Jerome D Brown

Fred Winslow Livermore

Gerald G Endres

A tape drive system is disclosed. The tape drive system includes at least one tape reel assembly, a storage tape, and at least one pack arm assembly. The tape reel assembly includes a hub defining a tape winding surface about which is wound the storage tape. The pack arm assembly is disposed adjacent the tape reel assembly and includes a pack arm and a pin. The pack arm defines a guide defining a pivot end and has at least one flexible flange cantilevered from a side of the guide. The pin is coupled to the tape drive system. In this regard, the pack arm is slidingly coupled to the pin and configured to follow the wound storage tape by moving axially relative to the hub and radially about the pivot end.

Pack arm assembly for use in a tape drive system

The invention provides novel macromonomer and carboxyl functional polyurethanes having a high carboxyl content. The invention further provides dispersions, coatings and magnetic recording media comprising these polyurethanes, or blends or copolymers of these polyurethanes with quaternary ammonium compounds. The invention further provides novel dispersions, coatings and magnetic recording media comprising combinations of carboxyl functional polyurethanes having a high carboxyl content with quaternary ammonium polymers.

Carboxylic acid functional polyurethane polymers and blends thereof used

This invention provides a method of producing goethite particles comprising the steps of a) reacting, in aqueous solution, less than a stoichiometric amount of an alkali compound with an iron (II) salt to form a precipitated complex intermediate, b) oxidizing iron (II) in the complex intermediate to iron (III) at an average rate less than 10 g iron(III)/l/hr to form goethite seed particles until 20 to 70% of iron (II) in the precipitated complex intermediate has been converted to iron (III), and c) after 20 to 70% of iron (II) in the precipitated complex intermediate has been convened to iron (III), increasing the average oxidation rate to greater than 10 g iron(III)/l/hr.

Process for making goethite

A doped magnetic iron oxide particle suitable for use in magnetic recording media, and methods of preparing the doped magnetic iron oxide particle, are disclosed. The doped magnetic iron oxide particle has the general formula:

Doped magnetic iron oxide particles and method of preparing the same

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Woodbury, MN, United States of America

Albena V Blagev