Multi-layered seat having different hardnesses and provided...

Details Multi-layered seat having different hardnesses and provided... Multi-layered seat having different hardnesses and provided...

A - Human Necessities

47

C

A47C 7/18 (2006.01) B29C 39/10 (2006.01) B29C 39/12 (2006.01) B29C 39/24 (2006.01) B29C 44/04 (2006.01) B29C 44/56 (2006.01) B68G 5/02 (2006.01)

Patent

CA 2230847

A multi-layered seat having different hardnesses and provided with a skin, having permeability, a good texture and a hardness capable of bearing the weight of a person who sits on the seat. A seat (1) is covered with a skin material (2) having permeability, and comprises a foamed body having an external shape substantially corresponding to that of the seat. The foamed body comprises a first foamed body (10), which constitutes the base of the foamed body, and a second foamed body (6), which is unitary on and with the first foamed body. The first foamed body (10) is provided at the surface thereof with projections (12, 13), which correspond to suction molded portions. A liquid foaming mixture is put in and build up on the first foamed body (10) so that it is thin on the suction molded portions and thick on the other portions. Using the first foamed body (10) and a pressure die which is disposed on the skin material above the liquid foaming mixture, has a shape of the top portion of the seat and is provided with suction ports, the mixture (15), of which the gas reaction has finished but which remains in a fluid state, is compressed, while performing suction through the suction ports, to thereby form the second foamed body (6) which is integral with the back surface of the skin material and the surface of the first foamed body and has a good texture.

L'invention concerne un siège multicouche possédant des zones de différentes duretés et pourvu d'une peau, présentant une certaine perméabilité, une bonne texture et une dureté lui permettant de soutenir le poids d'une personne assise sur lui. Le siège (1) selon l'invention est recouvert d'une peau (2) présentant une certaine perméabilité et comprend un ensemble corps alvéolaire dont la forme extérieure correspond sensiblement à celle du siège. L'ensemble corps alvéolaire comprend un premier corps alvéolaire (10), qui constitue la base de l'ensemble corps alvéolaire, et un second corps alvéolaire (6), qui ne forme qu'une seule pièce avec le premier corps alvéolaire sur lequel il est placé. Ledit premier corps alvéolaire (10) comporte, sur sa surface, des saillies (12, 13) qui correspondent à des parties moulées par aspiration. Un mélange moussant liquide est placé et réparti sur le premier corps alvéolaire (10) de sorte qu'il forme une couche mince sur les parties moulées par aspiration et une couche épaisse sur les autres parties. Au moyen du premier corps alvéolaire (10) et d'une coquille de moulage sous pression qui est placée sur la peau, au-dessus du mélange moussant liquide, a la forme de la partie supérieure du siège et est pourvue d'orifices d'aspiration, le mélange (15), dont la réaction gazeuse est terminée mais qui reste à l'état fluide, est comprimé, tandis qu'une aspiration est effectuée par l'intermédiaire des orifices d'aspiration, formant ainsi le second corps alvéolaire (6) qui ne forme qu'une seule pièce avec la face dorsale de la peau et la surface du premier corps alvéolaire.

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