Panel-shaped composite wooden element

Stock material or miscellaneous articles – Structurally defined web or sheet – Including components having same physical characteristic in...

Reexamination Certificate

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Details

C428S218000, C428S208000, C442S348000, C156S242000, C264S113000, C264S125000

Reexamination Certificate

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06986939

ABSTRACT:
The invention relates to a method for the manufacture of chipboard comprising a centre layer (18) of coarse chips and outer layers (20) of chips whose fibers are oriented in the plane of the board. In order to be able to reduce the density of the finished board while retaining the intrinsic characteristic profile of the board, it is proposed in accordance with the invention that the chips used to compose the centre layer (18) will comprise end-grain cut, flake-like chips (22) whose fibers are oriented in the thickness direction (24) of the chips, the chip fibers in the centre layer being oriented substantially transversely to the plane of the chipboard. The invention also relates to chipboard manufactured in accordance with the method.

REFERENCES:
patent: 4246310 (1981-01-01), Hunt et al.
patent: 4756955 (1988-07-01), Rias
patent: 5059466 (1991-10-01), Blumer
patent: 27 56 303 (1979-06-01), None
patent: 88 08 806.5 (1988-09-01), None
patent: 0 406 783 (1990-07-01), None
patent: 43 10 191 (1993-10-01), None
patent: 196 16 510 (1996-04-01), None
patent: 299 19 919 (2000-02-01), None
patent: 2776956 (1998-04-01), None
patent: 1 399 402 (1975-02-01), None
patent: 2152063 (1984-12-01), None
patent: WO 89/08539 (1989-03-01), None
patent: WO 89 08539 (1989-09-01), None
German Article; Holzbau-Taschenbuch, 1999.
Reference copies of of the 37 C.F.R. 1.97 and 1.98, 2000.

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