Douglas A Andrejewski from 2087 Laporte Rd, Hemlock, MI 48626, age 54, Phone: (989)8325837

Name / Title

Company / Classification

Phones & Addresses

Douglas Andrejewski
Principal

Andrejewski Hardwoods
Mfg Lead Pencils/Art Goods

2087 Laporte Rd, Hemlock, MI 48626

Roll Crusher To Produce High Purity Polycrystalline Silicon Chips
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US Patent:

20060070569, Apr 6, 2006
Filed:

Sep 20, 2005
Appl. No.:

11/231058
Inventors:

Douglas Andrejewski - Hemlock MI, US
Thomas Dubay - Saginaw MI, US
Terence Horstman - Frankenmuth MI, US
Roger Spencer - Midland MI, US
International Classification:

C30B 15/00
C30B 21/06
C30B 27/02
C30B 28/10
C30B 30/04
US Classification:

117013000
Abstract:

A single roll crusher for comminuting high purity materials includes a roll with teeth spaced around the circumference of the roll. The roll is rotatably mounted inside a housing. The housing has a top with an entrance port, sides, and bottom with an exit port. The roll, teeth, and at least the inside surfaces of the top, sides, and bottom are fabricated from a material of construction that minimizes contamination of silicon. The material of construction may be tungsten carbide with a cobalt binder. The single roll crusher is used for processing polycrystalline silicon.