Daniel C George

Author:

Daniel George

ISBN #:

0819530557

US Patent:

6844051, Jan 18, 2005

Filed:

Jul 29, 1999

Appl. No.:

09/743330

Inventors:

Daniel Eugene George - Chadds Ford PA, US
Shinichi Nakagawa - Utsunomiya, JP
Akira Yokoyama - Utsunomiya, JP

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

B65H 2954
G03G 1520
G03G 1514
B32B 2302

US Classification:

428192, 399323, 399398, 271307, 271311

Abstract:

This invention relates to a separation finger used in an Electro photographic device such as photocopying devices and laser-beam printers. More specifically, it relates to a separation finger with remarkably improved durability which has a sharp tips and is capable of preventing paper jams, caused by, for example, adhesion of the toner, over extended periods of time.

US Patent:

51791536, Jan 12, 1993

Filed:

Sep 9, 1991

Appl. No.:

7/756962

Inventors:

Daniel E. George - Chadds Ford PA

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

C08K 304

US Classification:

524495

Abstract:

Polyimide compositions containing both graphite and fluoropolymer exhibit superior wear performance against aluminum.

US Patent:

52849040, Feb 8, 1994

Filed:

May 27, 1993

Appl. No.:

8/066731

Inventors:

Daniel E. George - Chadds Ford PA

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

C08G 802
C08G 1200
C08G 6926

US Classification:

524600

Abstract:

Polyimide compositions containing graphite and wollastonite exhibit an unusual combination of low wear and friction and low coefficient of thermal expansion.

US Patent:

49201778, Apr 24, 1990

Filed:

Jun 20, 1989

Appl. No.:

7/368690

Inventors:

Daniel E. George - Chadds Ford PA

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

C08L 2326
C08L 2304
C08L 2310
C08J 324

US Classification:

525195

Abstract:

A process for accelerating the cure rate of a thermoplastic composition comprising blending 5-95 parts by weight of a crystalline polyolefin resin of a substantially saturated homopolymer or copolymer of a C. sub. 2 -C. sub. 8 alpha monoolefin and 5-95 parts by weight of a crosslinkable ethylene-containing terpolymer comprising ethylene, an alkyl acrylate or alkyl methacrylate wherein the alkyl group contains 1-6 carbon atoms or a vinyl ester of a monocarboxylic acid having 2-6 carbon atoms, and glycidyl acrylate or glycidyl methacrylate, and mixing and shearing the composition while crosslinking the ethylene-containing terpolymer with a crosslinking agent that is a combination of (a) from about 1. 5-9 parts by weight per 100 parts ethylene-containing terpolymer of an organic aliphatic or aromatic polycarboxylic acid or anhydride thereof containing 3-8 carbon atoms and (b) from about 0. 3-8 parts by weight per 100 parts ethylene-containing terpolymer of a divalent tin halide salt or a stannous acylate having the formula ##STR1## where R is an aliphatic hydrocarbyl radical having from 1-18 carbon atoms.