Combined cushion and protective cover and methods of forming
A combined cushion and protective covering for a patient support having a patient-supporting surface comprises a central section having length and width dimensions corresponding substantially to corresponding dimensions of the support surface. Flaps which are unitary with the central section extend from the side edges of the central section a distance beyond the side edges of the support surface. The flaps are thinner than the central section so as to depend from the central section and lie alongside the patient-supporting surface. The central section and the flaps are formed simultaneously by compressing a block of cushioning material in such manner that the central section forms a pad or cushion unitarily joined at its opposite sides to the flaps. During the compression of the block to form the central pad and the flaps the external surfaces of the pad and flaps are heated to an extent sufficient to enable the surfaces of the pad and flaps to form a smooth, moisture proof skin.
1. A combined protective cover and cushion construction adapted for use with a support having an upper surface of selected length and width, said construction comprising a first section of such length and width as to overlie and form a cushion for said surface, and a pair of flaps flanking and extending beyond opposite sides of said first section, said first section and said flaps being unitary and formed from cushioning material permanently deformed to different thicknesses, said flaps having a thickness less than that of said first section, said first section and each of said flaps having a smooth or textured moisture proof skin formed during the deformation of said cushioning material.
2. The construction according to claim 1 wherein said first section and each of said flaps have upper and lower surfaces, one surface of said first section being substantially coplanar with a surface of each of said flaps.
3. The construction according to claim 1 wherein said first section and each of said flaps have upper and lower surfaces, the lower surfaces of said first section and said flaps being substantially coplanar.
4. The construction according to claim 1 wherein said first section and said flaps are formed from foam material.
5. The construction according to claim 1 wherein said first section comprises a plurality of individual layers of cushioning material arranged in overlying relation.
6. The construction according to claim 5 wherein all of said layers are composed of identical cushioning material.
7. The construction according to claim 5 wherein not all of said layers are composed of identical cushioning material.
8. The construction according to claim 5 wherein at least one of said layers has a width less than that of an adjacent layer.
9. The construction according to claim 5 wherein said first section is formed of three of said layers arranged in sandwich form and wherein two of said layers flank the third layer, at least one of said layers having less resistance to compression than the others of said layers.
10. The construction according to claim 9 wherein said one of said layers is sandwiched between the other two of said layers.
11. A combined protective cover and cushion construction adapted for use with a support having an upper surface of selected length and width, said construction comprising a first section of such length and width as to overlie and form a cushion for said surface, and a pair of flaps flanking and extending beyond opposite sides of said first section, said first section and said flaps being unitary and formed from cushioning material permanently deformed to different thickness, said flaps having a thickness less than that of said first section, said first section and each of said flaps having upper and lower surfaces, the upper and lower surfaces of said flaps being at a level between the upper and lower surfaces of said first section.
12. A protective cover and cushion comprising a central section having length, width, and thickness dimensions, and a pair of flaps flanking and extending beyond opposite sides of said central section, said central section and each of said flaps having upper and lower surfaces, said central section and said flaps being unitary and formed from deformable, compressible, cushioning material permanently deformed to different thicknesses, the thickness of each of said flaps being sufficiently less than that of said central section as to enable said flaps to be of such flexibility as to depend from said central section.
13. The construction according to claim 12 wherein the upper and lower surfaces of said central section and said flaps have a selected smooth or textured moisture proof skin formed from said cushioning material.
14. A method of forming a cushioned, protective cover for a surface having selected length and width dimensions, said cover having opposite surfaces and opposite side edges, said method comprising permanently deforming by compression a first section of a block of compressible material and inward of said side edges to a predetermined thickness; and permanently deforming the side edges of said block adjacent said first section to a thickness less than that of said first section, thereby forming flaps at opposite sides of said first section, said flaps being of such thickness and flexibility as to be capable of assuming a depending position at said opposite side edges of said first section.
15. The method according to claim 14 wherein the deformation of said first section and said side edges of said block occurs simultaneously.
16. The method according to claim 14 including heating and subsequently cooling said opposite surfaces of said block during compression of said first section and said opposite side edges to such an extent as to cause said opposite surfaces to form a textured or smooth skin.
17. The method according to claim 14 wherein said first section is composed of a plurality of overlying layers of cushioning material.
18. The method according to claim 17 wherein there are three of said layers.
19. The method according to claim 18 wherein at least one of said layers is formed of cushioning material having a resistance to compression less than that of another of said layers.
20. The method according to claim 19 including sandwiching said one of said members between the others of said members prior to said deformation.