Method and apparatus for manufacturing multi-layer press...

Plastic and nonmetallic article shaping or treating: processes – Forming articles by uniting randomly associated particles – Stratified or layered articles

Reexamination Certificate

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Details

C264S112000, C264S123000, C425S363000

Reexamination Certificate

active

10380383

ABSTRACT:
A method for manufacturing press molded bodies having at least two separate layers of material is disclosed. The method comprises providing a pair of cooperating parallel arranged rollers (1, 2) defining a nip (3) therebetween and having cavities defined on their outer surfaces, each cavity on one of the rollers (1, 2) cooperating with another cavity of the other roller (2, 1) to form die means, the axes (4, 5) of the rollers (1, 2) being arranged substantially horizontally, feeding at least two contiguous separate streams of different particulate materials into die means adjacent to the nip (3), so that each die means will be filled with portions of different material and counter-rotating the rollers (1, 2) so that the materials contained in the die means will be compressed into press molded bodies (briquettes) having at least two separate layers of material. An apparatus for the manufacture of press moulded bodies is also disclosed.

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patent: 3269611 (1966-08-01), Komarek
patent: 4389178 (1983-06-01), Komarek
patent: 5271319 (1993-12-01), Plagemann
patent: 5630202 (1997-05-01), Bergendahl
patent: 5935496 (1999-08-01), Waatti
patent: 6120802 (2000-09-01), Breitenbach et al.
patent: 1230523 (1962-01-01), None
patent: 2258580 (1974-06-01), None
patent: 3806398 (1989-09-01), None
patent: 0923875 (1999-06-01), None
patent: 2332387 (1999-06-01), None
International Preliminary Examination Report dated Dec. 9, 2002 for application PCT/GB01/04137.
International Search Report dated Dec. 6, 2001 for application PCT/GB01/04137.
Combined Search and Examination Report dated Mar. 26, 2001 for application GB 0023055.7.
Written Opinion for application PCT/GB01/04137.
Patent Abstracts of Japan; vol. 007, No. 250 (M-254), Nov. 8, 1983 & JP 58 135800 A (Shintou Baauindo KK), Aug. 12, 1983; abstract.
English-language abstract for DE 3806398.
Two pages of a trade brochure entitled “Form Press Systems” from Hosokawa Bepex GmbH.

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