Fire resistant support for the human body

• US 4,504,990 A
• Filed: 07/19/1982
• Issued: 03/19/1985
• Est. Priority Date: 07/19/1982
• Status: Expired due to Fees

• Current Assignee: Slumberland Holdings Limited 'Hollyville' Holmfirth Road Greenfield Oldham 0L3 7DR
• Original Assignee: Courtaulds, PLC (Nouryon BV)
• Inventors: Scales, John T., Wilson, David, Poole, Anthony G., Middleton, Anthony J.
• Primary Examiner(s): Grosz, Alexander
• Application Number:
  US06/399,331
• Time in Patent Office: 974 Days
• Field of Search: 5/459, 5/483, 5/482, 5/497, 5/470, 5/471, 5/448, 5/481, 297/DIG. 5, 297/DIG. 1, 297/DIG. 2
• US Class Current: 5/698
• CPC Class Codes: A47C 31/001 Fireproof means
• CPC Class Codes: Y10S 5/954 Fireproof

Abstract

A resilient support for the human body, for example a mattress, comprises a resilient supporting block, for example of foamed polyurethane, and a fire resistant cover closely enclosing the block. At least part of the cover, which is use of the support, is intended to lie between the resilient block and a human body, is of stretch material and is able to conform to the adjacent surface of the resilient block when the support is subjected to deformation by a human body.

Claims

1. A resilient support for the human body comprising,

(a) a resilient supporting block,

(b) cover means closely enclosing said block,

(c) wherein said cover means are fire resistant,

(d) at least that part of said cover means intended to lie between the block and a human being being of stretch material,

(e) said stretch material having a recoverable extension of at least 20 percent in the width direction and at least 10 percent in the length direction measured on a Fryma Extensiometer according to British Standard No. 4294 using a load of 3 kg, whereby said stretch material is able to conform to the adjacent surface of the block when the support is subjected to deformation by a human being and recover sufficiently after extension so as to avoid forming creases or rucks after the block has returned to its undeformed state, said stretch material comprising,

(f) at least 75 percent by weight of cellulosic yarn based on the weight of the fabric and wherein,

(g) the fabric has a weight, after treatment with flame retardant, of at least 250 g/m².

2. A support as claimed in claim 1, wherein said fire resistant cover is made of fabric such that after one wash in water at 71°

C. the fabric fulfils the requirements (omitting the cleansing procedure) of Type C performance when tested according to Part 2 of British Standard No. 5867.

4. A support as claimed in claim 1, wherein said cover comprises a piece of sheet material adhered to an undersurface of the resilient block and a further piece of material covering at least an upper surface and side surfaces of the resilient block.

5. A support as claimed in claim 1, wherein said cellulosic yarn is formed into pile loops on the surface of said fabric adjacent the resilient block.

3. A support as claimed in caim 1, wherein said material has a recoverable extension of not less than 30 percent in the width direction and not less than 15 percent in the length direction.