John C Swanson

US Patent:

53594835, Oct 25, 1994

Filed:

Oct 16, 1992

Appl. No.:

7/962470

Inventors:

Cathleen M. Arsenault - St. Paul MN
Eric J. Donaldson - St. Paul MN
John W. Swanson - Maplewood MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

G11B 2303

US Classification:

360133

Abstract:

A lifter for cleaning a flexible magnetic recording disc. The lifter forces a fabric liner on the inner surface of a cartridge toward the rotating disc. The perimeter of the lifter is configured so that the force profile of the lifter taken across the width of its leading edge is not characterized by sudden changes in force across its width. The lifter can include a cut-out region within the area of the lifter, the region being configured to increase the force applied by the lifter along the inner tracks of the magnetic recording disc. The lifter does not significantly increase the torque required to drive the disc. The invention also includes a method of cleaning a disc using the lifter described above.

US Patent:

58962417, Apr 20, 1999

Filed:

Feb 7, 1997

Appl. No.:

8/796271

Inventors:

Ronald L. Hilton - No. St. Paul MN
Gregory A. Laska - Woodbury MN
John W. Swanson - Mahtomedi MN
Richard E. Domonkos - Avon CT

Assignee:

Imation Corp. - Oakdale MN

International Classification:

G11B 582

US Classification:

360135

Abstract:

A rotating removable data storage device hub, such as a hub for a micro-floppy magnetic data storage disc, that has a core of plain carbon steel and a primary coating. The hub may also include a vapor corrosion inhibiting layer on the primary coating. The plain carbon steel can have about 0. 5% or less carbon. The primary coating can be tin, nickel, zinc, chrome, paints, epoxies, epoxy-urethanes, phenolic resins, and combinations thereof. The vapor corrosion inhibiting layer may include an amine to reduce the rate of oxidation of the plain carbon steel core.

US Patent:

62929968, Sep 25, 2001

Filed:

Dec 15, 1998

Appl. No.:

9/211954

Inventors:

Ronald L. Hilton - No. St. Paul MN
Gregory A. Laska - Woodbury MN
John W. Swanson - Mahtomedi MN
Richard E. Domonkos - Avon CT

Assignee:

Imation Corp. - Oakdale MN

International Classification:

B23P 1704

US Classification:

29458

Abstract:

A method of making a rotating removable data storage device hub, such as a hub for a micro-floppy magnetic data storage disc, that has a core of plain carbon steel and a primary coating. The hub also includes a vapor corrosion inhibiting layer on the primary coating. The plain carbon steel can have about 0. 5% or less carbon. The primary coating can be tin, nickel, zinc, chrome, paints, epoxies, epoxy-urethanes, phenolic resins, and combinations thereof. The vapor corrosion inhibiting layer may include an amine to reduce the rate of oxidation of the plain carbon steel core.

US Patent:

D352702, Dec 26, 1989

Filed:

Feb 2, 1987

Appl. No.:

7/010173

Inventors:

Pamela J. Swanson - Maplewood MN
John W. Swanson - Maplewood MN

US Classification:

D32 47

US Patent:

58896392, Mar 30, 1999

Filed:

Feb 7, 1997

Appl. No.:

8/798305

Inventors:

John W. Swanson - Mahtomedi MN
Cathleen M. Arsenault - Woodbury MN
Gregory A. Laska - Woodbury MN
Ronald L. Hilton - St. Paul MN

Assignee:

Imation Corp. - Oakdale MI

International Classification:

G11B 23033
G11B 3314

US Classification:

360133

Abstract:

A plain carbon steel shutter for a removable data storage device includes a primary coating thereon to improve its appearance, wear, durability and resistance to corrosion. In addition to the primary coating, the shutter also includes a vapor corrosion inhibitor to reduce corrosion caused by ambient moisture in the atmosphere. To increase stiffniess, the fillet radius of the bends in the shutter are increased.