초록 ▼

A support construction includes two different-size sheets, the smaller one being sealed along all of its margins to the larger one, and the assembly is folded over, the smaller sheet being on the inside while overlapping margins of the larger sheet are sealed, in order to form a flat air compartment

A support construction includes two different-size sheets, the smaller one being sealed along all of its margins to the larger one, and the assembly is folded over, the smaller sheet being on the inside while overlapping margins of the larger sheet are sealed, in order to form a flat air compartment bonded by a liquid compartment having an upper and a lower portion. Additional seal points between the sheets establish obstructions for the liquid. An alternative form uses a flattened and folded lower sleeve. Valves permit filling of the compartments.

대표청구항 ▼

A liquid support construction, comprising: means for defining an enclosed, generally flat, continuous air compartment having an upper outer surface and a lower outer surface; sheet means for defining an enclosed upper and an enclosed lower liquid compartment which respectively bear against the upper

A liquid support construction, comprising: means for defining an enclosed, generally flat, continuous air compartment having an upper outer surface and a lower outer surface; sheet means for defining an enclosed upper and an enclosed lower liquid compartment which respectively bear against the upper and lower surfaces of the air compartment; and means for sealing the liquid compartment to the air compartment along sealing lines extending along a portion of a boundary of at least one of the compartments, whereby the liquid compartment is discontinuous at the sealing lines adjacent to the air compartment while the air compartment is continuous throughout.