Paul N Colby

US Patent:

6486432, Nov 26, 2002

Filed:

Nov 23, 1999

Appl. No.:

09/448329

Inventors:

Paul N. Colby - New Castle PA
Joeo M. Gatti - Strongsville OH
Shawn P. Bodnar - New Waterford OH
Paul T. Colby - New Castle PA

Assignee:

Spirex - Youngstown OH

International Classification:

B23K 2600

US Classification:

21912163, 21912164, 21912185

Abstract:

A system and process is provided for cladding the interior of plasticating barrels or any other interior surface. The cladding operation uses a laser head that carries out a spiral welding operation to create a smoother lining than is capable with conventional welding techniques. A number of different techniques can be used, including the use of feeding laser energy at one end of a tube to be reflected from laser aiming optics inserted through a second end of the tube. Unidirectional welding can be used to facilitate gravity as a smoothing agent. In another embodiment omnidirectional welding can be carried out using a shaped mirror and a donut-shaped laser pattern. The cladding operation can be simplified by baking a coating of the welding matrix and anti-abrasive material onto the interior of the surface to be clad prior to the welding operation.

US Patent:

20070056939, Mar 15, 2007

Filed:

Jul 31, 2006

Appl. No.:

11/496699

Inventors:

Paul Colby - New Castle PA, US
Paul Colby - Bodgega Bay CA, US

International Classification:

B23K 26/34

US Classification:

219121630, 219121640

Abstract:

A system and process is provided for cladding of cylindrical surfaces. The cladding operation uses a laser head to carry out a welding operation in a tube spinning at high speeds to create smoother interior and exterior linings than can be obtained with conventional welding techniques. As a result, substantial post-weld machining and finishing are eliminated.

US Patent:

20120100313, Apr 26, 2012

Filed:

Oct 17, 2011

Appl. No.:

13/274655

Inventors:

Paul T. Colby - New Castle PA, US
David Hotchkiss - Oconomowoc WI, US
James W. Sears - Rapid City SD, US

Assignee:

Xaloy, Inc. - New Castle PA

International Classification:

H05B 6/02
B05C 5/04
B01J 19/12
B05C 11/00

US Classification:

427591, 118708, 118620, 427596

Abstract:

A vertical laser cladding system is particularly effective for the interior surfaces of tube-like structures. The vertical cladding process works from bottom to top, so that previously clad layers form a shelf for subsequent application of cladding powder. This system is also particularly effective for handling double-bore plasticating barrels.

US Patent:

49532790, Sep 4, 1990

Filed:

Oct 6, 1989

Appl. No.:

7/418238

Inventors:

Paul N. Colby - New Castle PA

Assignee:

Spirex Corporation - Youngstown OH

International Classification:

B23P 600

US Classification:

2940206

Abstract:

A method and apparatus for cutting grooves onto the interior surface of the barrel of a plasticating machine in order to increase the friction against sliding unmelted resin particles. The helical screw is removed from the barrel without removing the barrel from its operating site. A grooving device is transported from a remote location to the plasticating operation site and mounted within the barrel with a portion protruding from the barrel. A brance is attached to the end of the barrel to help support the grooving device. Periodic adjustments are made to the grooving device by manual or automatic manipulation of the grooving device.

US Patent:

50189174, May 28, 1991

Filed:

May 14, 1990

Appl. No.:

7/522690

Inventors:

Paul N. Colby - New Castle PA

Assignee:

Spirex Corporation - Youngstown OH

International Classification:

B23P 600
B23D 108

US Classification:

409296

Abstract:

A method and apparatus for cutting grooves onto the interior surface of the barrel of a plasticating machine in order to increase the friction against sliding unmelted resin particles. The helical screw is removed from the barrel without removing the barrel from its operating site. A grooving device is transported from a remote location to the plasticating operation site and mounted within the barrel with a portion protruding from the barrel. A brace is attached to the end of the barrel to help support the grooving device. Periodic adjustments are made to the grooving device by manual or automatic manipulation of the grooving device.

US Patent:

57980772, Aug 25, 1998

Filed:

Nov 4, 1996

Appl. No.:

8/743542

Inventors:

Timothy W. Womer - Edinburg PA
Paul N. Colby - New Castle PA
Harry F. White - New Castle PA

Assignee:

Spirex Corporation - Youngstown OH

International Classification:

B29C 4738
B29C 4764

US Classification:

264349

Abstract:

A plasticating screw and method of plasticating without thermal degradation problems. Said screw having a metering section with a helical flight disposed within and cooperating with the innerwall of a heated barrel. In particular, solid resinous material is introduced to a helical valley extending between said flight. The resinous material is heated and plasticized by said apparatus while being advanced along a helical path towards an outlet opening by the rotation of said screw. The bottom surface of the helical valley in said metering section having a plurality of geometrically shaped surfaces in side-by-side relation with at least two of said shaped surfaces being sloped. During operation, the level differential between the shaped surfaces induces a continuous tumbling, variable shear and mixing action upon the molten resin as the molten resin in the metering section flows along the helical path.

US Patent:

53183576, Jun 7, 1994

Filed:

Jun 16, 1992

Appl. No.:

7/899347

Inventors:

Paul N. Colby - New Castle PA
Bradley P. Smith - Youngstown OH
Shawn P. Bodnar - East Palestine OH

Assignee:

Spirex Corporation - Youngstown OH

International Classification:

B01F 708
B29B 742

US Classification:

366081

Abstract:

A screw for use in an plasticating injection apparatus includes a plurality of interrupted primary flights. An outer surface of a primary valley is formed by the primary flights and features a plurality of plateaus. The plateaus span adjacent sections of the primary flights and define shallow levels between deeper levels of the primary valleys. This depth differential contributes to a turbulent mixing action which, along with the primary and secondary valleys, contributes to improve mixing action within a metering section of the screw. The primary flights are interrupted by secondary valleys which are of opposite hand to the primary valleys.

US Patent:

50712560, Dec 10, 1991

Filed:

Jul 9, 1990

Appl. No.:

7/549974

Inventors:

Bradley P. Smith - Youngstown OH
Paul N. Colby - New Castle PA

Assignee:

Spirex Corporation - Youngstown OH

International Classification:

B01F 708
B29B 742

US Classification:

366 89

Abstract:

A plasticating apparatus and method for its use including a rotating screw having a helical flight disposed within and cooperating with the inner wall of a heated barrel with said barrel provided with inlet and outlet openings so that particles of resinous material are introduced through said inlet opening to a helical valley extending along said flight to be plasticated by said screw and advanced towards said outlet opening. A barrier extends along said helical valley to divide said helical valley into coextensive side by side helical valley sections. The barrier extends in a path which is non-parallel and alternating with respect to the helical flight so that the pitch of the barrier is alternately greater than and less than the pitch of the helical flight. The height of the barrier is less than the height of the flight so that the resinous material overflows the barrier due to changes in width of said side by side helical valley sections.