Multi-layer seat having different hardness and method for manufacturing the same
First Claim
1. A seat comprising a surface material and a first cushioning body and a second cushioning body covered with said surface material,said first cushioning body and said second cushioning body having a shape generally corresponding to an outline of the seat,said first cushioning body as an upper layer being integral with at least a part of said surface material and having a main portion of relatively low compressibility and side portions of outwardly increasing relatively higher local compressibility;
- andsaid second cushioning body as a lower layer being connected to and positioned under said first cushioning body,wherein said first cushioning body has a contact surface having a shape corresponding to a shape of a contact surface of said second cushioning body, and fastener means integrally formed in said contact surfaces for connecting said first and said second cushion bodies, so that said first and said second cushioning bodies are connected through said fastener means provided on said contact surfaces thereof.
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Accused Products
Abstract
An object of the present invention is to provide a seat wherein a surface material of the seat is not crumpled by sliding the surface material on a cushioning body thereof and while a person can sit comfortably in the seat, the seat has adequate hardness such that the weight of the person can be supported. A seat (1) comprises a surface material (2) and a cushioning body (6, 12) covered with the surface material. The cushioning body has a shape corresponding to an outline of the seat and is structured of a first cushioning body (6) as an upper layer and a second cushioning body (12) as a lower layer. The first cushioning body is intergral with at least a part of a back surface of the surface material and is connected with the second cushioning body. The first cushioning body has a contact surface (10) corresponding to the shape of a contact surface (13) of the second cushioning body. The first and second cushioning bodies have fasteners (11a, 11b, 14a, 14b), respectively. Those fasteners are intergral with the first and second cushioning body, respectively, and the first cushioning body and the second cushioning body are connected by those fasteners.
35 Citations
25 Claims
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1. A seat comprising a surface material and a first cushioning body and a second cushioning body covered with said surface material,
said first cushioning body and said second cushioning body having a shape generally corresponding to an outline of the seat, said first cushioning body as an upper layer being integral with at least a part of said surface material and having a main portion of relatively low compressibility and side portions of outwardly increasing relatively higher local compressibility; - and
said second cushioning body as a lower layer being connected to and positioned under said first cushioning body, wherein said first cushioning body has a contact surface having a shape corresponding to a shape of a contact surface of said second cushioning body, and fastener means integrally formed in said contact surfaces for connecting said first and said second cushion bodies, so that said first and said second cushioning bodies are connected through said fastener means provided on said contact surfaces thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for manufacturing a seat wherein said seat is structured of a cushioning body which is integral with a surface material and has a shape defining an outline of said seat, said cushioning body comprising a first cushioning body and a second cushioning body, said first and said second cushion bodies being connected to each other, comprising steps of:
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placing at least one first fastener for connecting said first cushioning body with said second cushioning body on a surface of a bottom half of a pressure type mold, said pressure type mold being for pressure-molding said first cushioning body, said surface of said bottom half thereof being for defining a first contact surface for connecting with said second cushioning body; supplying a foamable mixture solution in said bottom half of said pressure type mold; disposing a surface material between said foamable mixture solution supplied in said bottom half of said pressure type mold and a top half thereof; closing both said halves of said pressure type mold when said foamable mixture solution is still in a state of flow but has completed a gas reaction thereof; placing at least one second fastener on a surface of a bottom half of a foaming mold so that said second fastener can be positioned corresponding to said first fastener, said foaming mold being for molding said second cushioning body, said surface of said bottom half thereof having a second contact surface corresponding to said first contact surface; supplying a foamable mixture solution in said bottom half of said foaming mold and then closing said bottom half of said foaming mold by a top half thereof; engaging said first fastener of said first cushioning body and said second fastener of said second cushioning body with each other. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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- 22. A seat having a cushion covered in part by a surface material comprising, a first cushioning body constituting the upper layer of the cushion and having at least part of the surface material formed integrally therewith, a second cushioning body constituting the lower layer of the cushion, said first cushioning body having a main portion of generally uniform thickness and side portions continuing from said main portion and becoming gradually outwardly thinner and progressively outwardly harder, said main portion of said first cushioning body forming a seating surface and a first contact surface for engaging said second cushioning body, a second contact surface formed on said second cushioning body having a shape substantially corresponding to the shape of said first contact surface, at least one first fastener formed integrally in said first contact surface, and at least one second fastener formed integrally in said second contact surface and positioned for engagement with said first fastener, whereby said first and second cushioning bodies are selectively positioned and connected by joining said first and second fasteners.
Specification