Jeffery J Hanson

US Patent:

6998087, Feb 14, 2006

Filed:

May 10, 2004

Appl. No.:

10/842269

Inventors:

Jeffery J. Hanson - Shakopee MN, US
Michael David Bosveld - St. Paul MN, US
John Samuel Batchelder - Somers NY, US

Assignee:

Stratasys, Inc. - Eden Prairie MN

International Classification:

B29C 41/02

US Classification:

264308

Abstract:

A multi-tip extrusion method and apparatus for building a three-dimensional object deposits modeling materials from distinct supply sources, each in a layerwise predetermined pattern, from dispensers having co-planar dispensing tips. The tip spacing is controlled so that a road of material extruded by a leading one of the tips will cool and shrink from the plane of the tips before a trailing one of the tips passes over the road. In this manner, smearing of the road by a trailing one of the tips is avoided.

US Patent:

7125512, Oct 24, 2006

Filed:

Apr 17, 2003

Appl. No.:

10/511787

Inventors:

Steven Scott Crump - Wayzata MN, US
Jeffery J. Hanson - Shakopee MN, US

Assignee:

Stratasys, Inc. - Eden Prairie MN

International Classification:

B29C 45/00

US Classification:

2643281, 264401, 264464, 264442

Abstract:

Disclosed is a method and apparatus for making a prototype injection molded part. An extruder of the type used for fused deposition modeling injects production thermoplastic material into a heated nonconductive plastic mold tool slowly at low pressure in an isothermic process. The mold tool may be built from a CAD drawing by fused deposition modeling or another rapid prototyping technique. Using the present invention, an injection molded prototype part can be made from a digital representation of the part within 24 hours by an engineer in an office environment.

US Patent:

6749414, Jun 15, 2004

Filed:

Apr 30, 2001

Appl. No.:

09/845566

Inventors:

Jeffery J. Hanson - Shakopee MN
Michael David Bosveld - St. Paul MN
John Samuel Batchelder - Somers NY

Assignee:

Stratasys, Inc. - Eden Prairie MN

International Classification:

B29C 3510

US Classification:

425130, 4251311, 4251744, 425375

Abstract:

Disclosed is a multi-tip extrusion apparatus and design methodology whereby a single extrusion head having approximately co-planar, fixed-position dispensing tips is used in a three-dimensional modeling machine to deposit multiple types of materials from distinct material supply sources. The tips are spaced apart a distance great enough so that a road of material extruded by a leading one of the tips will cool and shrink from the plane of the tips so that it is not smeared by contact with a trailing one of the tips.