Patent ID: 7395567

Claim:
A sheet retention system comprising: a rail assembly formed of rails equal to the length of side faces of a waterbed, each of the rails having a common cross sectional configuration with a flat rear face and with sloping faces extending forwardly and terminating in a groove, the groove having inwardly extending parallel surfaces with a common spacing and terminating in a semi-cylindrical surface; coupling components including screws extending through the rails and adapted to couple with sides of a waterbed; and a plurality of similarly configured rods each having a cylindrical configuration with a diameter slightly less than the spacing between the sides of the groove and the diameter of the semi-cylindrical surfaces; and a sheet having a rectangular configuration with an extended rectangular periphery, the sheet adapted to be positioned over a waterbed with the periphery extending whereby a user is adapted to entrain the periphery around a plurality of rods and insert the rods and entrained peripheries into the grooves whereby the retention system will properly position the sheet with respect to the rails and a waterbed in a convenient and economical manner while allowing for the convenient and economical separation of the sheet and rods from the rails.