Norman W Nelson

US Patent:

45983291, Jul 1, 1986

Filed:

Mar 17, 1983

Appl. No.:

6/476062

Inventors:

Norman E. Nelson - Roseville MN

Assignee:

Minnesota Mining and Manufacturing Company - Saint Paul MN

International Classification:

G11B 1560
G11B 1532
B65H 2308

US Classification:

36013021

Abstract:

A slack limiter device for magnetic recording tape in a videocassette which has a slotted metal plate forcefully slidaby fitting over an elongated stem on a cassette housing and bonded to a springy film having a low-friction edge covering which presses against moving tape.

US Patent:

45620288, Dec 31, 1985

Filed:

May 14, 1984

Appl. No.:

6/610047

Inventors:

Norman E. Nelson - Roseville MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

B29C 1702

US Classification:

264160

Abstract:

A method is described for forming a novel bowed shim for a cassette which includes impacting one surface of a sheet of polymeric material with particles until layer-like portions adjacent its surfaces are differentially expanded and the material is bowed, and then cutting the shim from the material.

US Patent:

41229851, Oct 31, 1978

Filed:

Nov 25, 1977

Appl. No.:

5/854601

Inventors:

Norman E. Nelson - Roseville MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

B65H 1720

US Classification:

226181

Abstract:

A tape cartridge is formed with a rotatable tape transport roller having a cylindrical exterior surface and a central bore into which protrudes a node from each inner sidewall of the cartridge to serve as trunnion axes for supporting the roller therein. In a preferred embodiment, the trunnion axes have an inward slant away from the central bore of the roller so that axial movement of the roller will produce a canting thereof to compensate for misalignment between the cartridge and components of a record/reproduce player in which the cartridge may be inserted.

US Patent:

41846508, Jan 22, 1980

Filed:

May 8, 1978

Appl. No.:

5/903497

Inventors:

Norman E. Nelson - Roseville MN
Robert C. Cheasick - Camarillo CA

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

B65H 7518

US Classification:

242 718

Abstract:

Recording tape reel having a plastic hub of I-beam construction and a pair of plastic flanges interconnected by an annular array of radially-elongated lugs through slots in the central web of the hub. Clearances permit the hub to be compressed under forces applied by a wound tape without substantially transmitting those forces to the flanges.

US Patent:

43289320, May 11, 1982

Filed:

Nov 3, 1980

Appl. No.:

6/203437

Inventors:

Norman E. Nelson - Roseville MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

B65H 7518

US Classification:

242 718

Abstract:

A weight assembly adapted for use with a polymeric reel to approximately match the moment of inertia of the polymeric reel to that of a similar metal reel. The weight assembly includes attachment assemblies adapted to enter apertures in a side wall of the reel, which attachment assemblies include pendulums automatically moved by gravity or centrifugal forces to releasably attach the weight assembly to the side wall of the reel.

US Patent:

44588585, Jul 10, 1984

Filed:

Jan 7, 1982

Appl. No.:

6/337629

Inventors:

Norman E. Nelson - Roseville MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

G11B 1532
G11B 2304

US Classification:

242199

Abstract:

A method is described for forming a novel bowed shim for a cassette which includes impacting one surface of a sheet of polymeric material with particles until layer-like portions adjacent its surfaces are differentially expanded and the material is bowed, and then cutting the shim from the material.

US Patent:

46780807, Jul 7, 1987

Filed:

Dec 3, 1985

Appl. No.:

6/804060

Inventors:

Norman E. Nelson - Roseville MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

B65D 85672
B65D 4314

US Classification:

206387

Abstract:

A closed, molded box for storing a videocassette includes an open sleeve, a cover and a living hinge connecting the sleeve and the cover, the hinge, the sleeve and the covering being molded simultaneously and integrally. The videocassette box may further include raised ridges on the cover and raised detents on the sleeve which engage to maintain the cover in its closed position. The cover may also include an inwardly directed protrusion adapted to contact a videocassette within the sleeve and prevent movement of the videocassette when the cover is closed.

US Patent:

47543574, Jun 28, 1988

Filed:

Feb 4, 1985

Appl. No.:

6/697800

Inventors:

Norman E. Nelson - Roseville MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

G11B 2302

US Classification:

360132

Abstract:

The front-facing planar surfaces of a videotape cassette is provided with a series of parallel triangular or semi-elliptical ribs spaced from each other a maximum distance of about 4 mm so that an air barrier is produced between the tape and the ribs and the tape is thus prevented from contacting the planar surface or the ribs when the tape is in motion past the ribs.