Method and expansion device for preparing expanded...

Details Method and expansion device for preparing expanded... Method and expansion device for preparing expanded...

2007-03-20

2007-03-20

Zemel, Irina S. (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

C422S133000, C422S135000, C422S210000, C422S212000, C422S224000, C422S309000, C366S278000

Reexamination Certificate

active

10736611

ABSTRACT:
The present invention relates to a method of preparing expanded thermoplastic microspheres, comprising charging thermally expandable microspheres into an expansion device comprising rotating feeding means enveloped by a hollow body, and one or more scrapers. The invention further relates to an expansion device for expanding thermoplastic microspheres.

REFERENCES:
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patent: 3804378 (1974-04-01), Walls
patent: 3808701 (1974-05-01), Bachmann
patent: 4379106 (1983-04-01), Bussey
patent: 4722943 (1988-02-01), Melber
patent: 4958933 (1990-09-01), Zakich
patent: 5228775 (1993-07-01), Horn
patent: 5342689 (1994-08-01), Melber
patent: 6099288 (2000-08-01), Long
patent: 0486080 (1992-05-01), None
patent: 0566367 (1993-04-01), None
patent: 1067151 (2001-01-01), None
patent: 2699089 (1994-06-01), None
patent: 92/20465 (1992-11-01), None
Patent Abstracts of Japan, Abstract of JP 55137928, Publication Date Oct. 28, 1980.
English language abstract XP-002239101 of SE 8703979, Apr. 14, 1989.
English language abstract of WO 94/13383, the equivalent of FR 2699089.

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