ApplicationNo. 379493 filed on 07/16/1973
US Classes:5/740, With unusual foam material or configuration428/131, Including aperture428/178, Forming, or cooperating to form cells428/179, Aligned or parallel nonplanarities428/304.4, Composite having voids in a component (e.g., porous, cellular, etc.)428/316.6, Plural void-containing components5/701, Rigid plate or layer reinforced, with uniform, fixed supporting characteristics across top surface5/944WITH UPSTANDING FIRM MASSAGING PROJECTIONS
ExaminersPrimary: Lesmes, George F.
Assistant: Thibodeau, Paul J.
Attorney, Agent or Firm
International ClassA47C 27/14 (20060101)
Foreign Application Priority Data1972-07-17 JA
AbstractLightweight construction materials having a low heat shrinking percentage and a high moisture permeability obtained by forming complementary concavoconvex patterns by means of press molding on both surfaces of a sheet of a foamed polyethylene type resin containing a relatively large amount of inorganic calcic filler, cushion made of said construction materials and mattress manufactured by laminating sheets of soft polyurethane foam on the lightweight construction material as core and covering the whole with cloth.