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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0651329 (1976-01-21) |
우선권정보 | FR-0024603 (1975-08-01) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 11 인용 특허 : 1 |
A foam-producing mixture is poured directly into a mold, whose base is constituted by an inner movable wall and outer stationary wall which is provided with supports passing through holes in the inner wall in order to retain mattress springs by the frustums of cones. The springs also bear against an
In a method for producing a mattress of the type wherein a synthetic material is foamed in a mold about a plurality of coil springs, the improvement which comprises: (a) disposing in a mold, without pre-compression, a plurality of bi-conical springs, each spring in the mold being supported on an ass
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