Paul J Swenson

US Patent:

6596213, Jul 22, 2003

Filed:

Apr 6, 2001

Appl. No.:

09/828254

Inventors:

Paul Swenson - Hamilton MA

Assignee:

Kortec, Inc. - Beverly MA

International Classification:

B29C 4516

US Classification:

264255, 2643288, 26432812

Abstract:

A novel technique for molding multi-layer polymer plastic articles having inner, outer and interior or core layers by controlling relative volumetric flow rates of the inner and outer layers to enable relative shifting of the position of the core, and also the relative thickness of the inner and outer layers in the molded articles; and with leading, and, where desired, trailing ends of the interior layer flow into the mold cavity substantially positioned on the zero gradient of the velocity profile of the flowing polymer streams.

US Patent:

6908581, Jun 21, 2005

Filed:

Jan 31, 2003

Appl. No.:

10/355642

Inventors:

Douglas Sabin - Marblehead MA, US
Paul Swenson - South Hamilton MA, US

Assignee:

Kortec, Inc. - Beverly MA

International Classification:

B29C045/16

US Classification:

264255, 2643288, 26432812

Abstract:

A method of co-extruding a plurality of plastic material flowing streams into a mold cavity produces a molded product. Inner and outer streams of covering plastic materials are combined with at least one interior stream that is to serve as an interior core of a resulting molded plastic product. The combined streams are forced to flow along annular flow paths, with the annular interior stream encased within the inner and outer annular covering plastic material stream layers. The flows of the interior stream and the inner and outer streams are controlled so that: the interior stream has a flow velocity that is greater than an average velocity of the combined stream, and the interior stream does not flow along or across a zero-velocity-gradient streamline of the combined streams.

US Patent:

7306446, Dec 11, 2007

Filed:

May 21, 2004

Appl. No.:

10/851284

Inventors:

Douglas Sabin - Marblehead MA, US
Paul Swenson - South Hamilton MA, US
Ronald Roberts - Melrose MA, US

Assignee:

Kortec, Inc. - Ipswich MA

International Classification:

B29C 45/23

US Classification:

425130, 425564, 425572

Abstract:

Disclosed herein are a method and apparatus for combining two or more streams of a polymeric material to form a plastic object. The method and apparatus are capable of ending an interior layer of the plastic object at a desired length to avoid the need to clean selected surfaces of components used to form the plastic object. The method and apparatus increase the velocity of the polymeric material used to form the plastic object in certain components used to form the plastic object. The increase in the velocity of the polymeric material facilitates the ending of the interior layer of the plastic object.

US Patent:

7399442, Jul 15, 2008

Filed:

Jul 7, 2005

Appl. No.:

11/177464

Inventors:

Douglas Sabin - Marblehead MA, US
Paul Swenson - South Hamilton MA, US
Ronald Roberts - Melrose MA, US

Assignee:

Kortec, Inc. - Ipswich MA

International Classification:

B29C 45/22

US Classification:

2643288, 425130

Abstract:

Disclosed herein are methods and systems for forming a plurality of multiple layer plastic articles. The methods and systems utilize shooting pot technology in combination with a combination of thermal control elements and in some instances, specialized flow bore geometries to control a thermal property and a flow parameter of selected polymeric material flowing through the system to mold the plurality of multiple layer plastic articles. Both the systems and methods are well suited for use to perform simultaneous flow injection or sequential flow injection to form the plurality of multiple layer plastic articles. The systems and methods described therein beneficially reduce the mold cavity pitch size for multiple layer molds used with systems having shooting pot technology to a mold cavity pitch size found on conventional monolayer molds to provide a plurality of multiple layer plastic articles having a cost similar to monolayer plastic articles.

US Patent:

7517480, Apr 14, 2009

Filed:

Aug 18, 2004

Appl. No.:

10/920725

Inventors:

Douglas Sabin - Marblehead MA, US
Paul Swenson - South Hamilton MA, US

Assignee:

Kortec, Inc. - Ipswich MA

International Classification:

B29C 45/76

US Classification:

264 401, 700200, 264 406, 425144, 425172

Abstract:

A control system for use with a multi-layer molding device having an inspection device for measuring a characteristic of a product of a cavity of the molding device and a controller adapted to receive information corresponding to the at least one characteristic from the inspection device and to alter the molding device based on the information.

US Patent:

7695266, Apr 13, 2010

Filed:

Nov 2, 2006

Appl. No.:

11/555913

Inventors:

Jeffrey Douglas MacDonald - North York, CA
Adam Craig Reynolds - Bolton, CA
Paul Michael Swenson - South Hamilton MA, US
John Nicholas Kermet - Danvers MA, US

Assignee:

Husky Injection Molding Systems Ltd. - Bolton, ON

International Classification:

B29C 45/10
B29C 45/16

US Classification:

425130, 2643288, 425 88, 425192 R, 425213, 425542

Abstract:

Disclosed is a molding structure, amongst other things.

US Patent:

8075828, Dec 13, 2011

Filed:

Jan 7, 2010

Appl. No.:

12/683866

Inventors:

Jeffrey Douglas MacDonald - North York, CA
Adam Craig Reynolds - Bolton, CA
Paul Michael Swenson - South Hamilton MA, US
John Nicholas Kermet - Danvers MA, US

Assignee:

Husky Injection Molding Systems Ltd. - Bolton, Ontario

International Classification:

B29C 45/10
B29C 45/16

US Classification:

2643281, 2643288

Abstract:

Disclosed is a method of molding molded articles, amongst other things.

US Patent:

8435434, May 7, 2013

Filed:

Dec 7, 2011

Appl. No.:

13/314012

Inventors:

Paul M. Swenson - South Hamilton MA, US

Assignee:

Kortec, Inc. - Rowley MA

International Classification:

B29C 45/16

US Classification:

264250, 2643288, 26432812

Abstract:

A mold for molding an injection molded article comprises a mold cavity with a non-symmetrical portion. At least one flow leader in the non-symmetrical portion of the cavity may produce a symmetrical flow boundary in a multilayer flow downstream of the non-symmetrical portion of the mold cavity. The at least one flow leader may be a plurality of flow leaders having a flow path length that differs from the flow path length of an adjacent flow leader by no more than about 15%. The multilayer flow comprising an inner layer, an outer layer, and an interior layer. Co-injection molding apparatus and methods that may use the foregoing mold are disclosed. Similarly, co-injection molded articles and containers that may result from the foregoing mold, apparatus, and methods are disclosed.