Jerry Wayne Potter

US Patent:

51105179, May 5, 1992

Filed:

Jun 1, 1990

Appl. No.:

7/531654

Inventors:

Craig R. Lukhard - Newark DE
Jerry F. Potter - Seaford DE
Maurice C. Todd - Chadds Ford PA

Assignee:

E. I. DuPont de Nemours and Company - Wilmington DE

International Classification:

D02J 112

US Classification:

264 401

Abstract:

A method and apparatus for deregistering drawn crimped nylon multifilament tow includes the steps of stretching the tow under constant controlled tension at a temperature below the glass transition temperature of the nylon. The apparatus includes means for sensing the tension of the tow between the feed and draw sections of a stretching device and producing a signal representative of the tension sensed and a controller for changing the speed of the draw section actuated by said signal.

US Patent:

51878453, Feb 23, 1993

Filed:

Apr 11, 1991

Appl. No.:

7/682331

Inventors:

Joseph J. Duffy - Newark DE
Jerry F. Potter - Seaford DE
Elwood A. Roth - Seaford DE
Kalika R. Samant - Seaford DE
Maurice C. Todd - Chadds Ford PA

Assignee:

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

International Classification:

D02G 112
D02G 100
D01G 3700

US Classification:

28267

Abstract:

A method of producing crimped tow by continuously feeding a tow against an adjustable counter pressure means; the tow is maintained at an average predetermined thickness and steam enters the chamber and is exhausted from the chamber in a manner to provide uniform heating of the tow to provide a fiber that is uniformly annealed as determined by measuring light reflectance for yarn dyed with a structural sensitive Milling Blue "B" dye or shrinkage uniformity determined by thermal analysis.

US Patent:

54221803, Jun 6, 1995

Filed:

Aug 10, 1993

Appl. No.:

8/102323

Inventors:

Craig R. Lukhard - Newark DE
Jerry F. Potter - Seaford DE
Maurice C. Todd - Chadds Ford PA

Assignee:

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

International Classification:

D02G 302
D02G 324

US Classification:

428362

Abstract:

A method and apparatus for deregistering drawn crimped nylon multifilament tow includes the steps of stretching the tow under constant controlled tension at a temperature below the glass transition temperature of the nylon. The apparatus includes means for sensing the tension of the tow between the feed and draw sections of a stretching device and producing a signal representative of the tension sensed and a controller for changing the speed of the draw section actuated by said signal.

US Patent:

51466511, Sep 15, 1992

Filed:

Dec 21, 1990

Appl. No.:

7/631432

Inventors:

Joseph J. Duffy - Newark DE
Jerry F. Potter - Seaford DE
Elwood A. Roth - Seaford DE
Kalika R. Samant - Seaford DE
Richard E. Thek - Seaford DE
Maurice C. Todd - Chadds Ford PA

Assignee:

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

International Classification:

D01G 2306

US Classification:

19 65T

Abstract:

Controlling the cross-sectional characteristics of moving tow lines by providing monitors and positioning devices so as to improve stuffer box crimp uniformity. The mass distribution profile of a filamentary tow band is continuously measured as a function of the width of the band, and the information obtained is used to change the position of the band when a deviation from a predetermined value is noted. Positioning devices are used to carry out the movement or adjusting of the band in accordance with a signal so as to correct the deviation and present to a crimping apparatus, such as a stuffer box crimper, a band having a uniform mass distribution profile.

US Patent:

52424650, Sep 7, 1993

Filed:

Oct 21, 1992

Appl. No.:

7/964085

Inventors:

Joseph J. Duffy - Newark DE
Jerry F. Potter - Seaford DE
Elwood A. Roth - Seaford DE
Kalika R. Samant - Seaford DE
Maurice C. Todd - Chadds Ford PA

Assignee:

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

International Classification:

D02G 300
D06P 324
D06P 700

US Classification:

8494

Abstract:

A method of producing crimped tow by continuously feeding a tow against an adjustable counter pressure means; the tow is maintained at an average predetermined thickness and steam enters the chamber and is exhausted from the chamber in a manner to provide uniform heating of the tow to provide a fiber that is uniformly annealed as determined by measuring light reflectance for yarn dyed with a structural sensitive Milling Blue "B" dye or shrinkage uniformity determined by thermal analysis.