Gripper foundation

Abstract

A gripper foundation is disclosed comprising a conventional mattress foundation which is encased within foundation upholstery. The foundation upholstery contains a sheet material which covers the entire top surface of the foundation, the sheet material having a raised pattern printed thereon which creates a high coefficient of friction with the bottom of a mattress surface or a bed sheet contained therebetween. The raised pattern may cover the entire top surface of the foundation, only a portion of the top surface, such as the perimeter portion, or other alternate configurations. The raised pattern may also take on a variety of patterns such as a plurality of diagonal lines, a plurality of straight lines, a plurality of diamonds or squares, or any other such pattern. The gripper foundation eliminates the need for any type of mechanical bed sheet retainer or additional pad or frictional surface which is to be positioned between a foundation and mattress.

1 . A gripper foundation comprising:
 a substantially rectangular frame;   a wire grid supported above the frame by an array of wire springs which are secured to a wooden frame;   the entire foundation encased within a sheet material, the top surface of the sheet material containing a raised pattern having a latex coating.   
     
     
         2 . The gripper foundation of  claim 1 , wherein the sheet material is polyester. 
     
     
         3 . The gripper foundation of  claim 1 , wherein the thickness of the raised pattern is approximately 0.019 inches. 
     
     
         4 . The gripper foundation of  claim 1 , wherein the thickness of the raised pattern is approximately 0.013 inches. 
     
     
         5 . The gripper foundation of  claim 1 , wherein the top surface of the gripper foundation is approximately 0.032 inches thick. 
     
     
         6 . The gripper foundation of  claim 1 , wherein the raised pattern is in the form of a plurality of diagonal lines. 
     
     
         7 . The gripper foundation of  claim 1 , wherein the raised pattern is located around the perimeter of the top surface of the foundation only. 
     
     
         8 . The gripper foundation of  claim 1 , wherein the raised pattern extends from end to end over the entire top surface of the foundation. 
     
     
         9 . A gripper foundation comprising:
 a mattress foundation which is completely encased within foundation upholstery, a top surface of the foundation upholstery comprising a sheet material having a raised latex coating arranged in a pattern and printed thereon, the top surface of the foundation upholstery being in direct contact with a bottom surface of a mattress placed thereon.   
     
     
         10 . The gripper foundation of  claim 9 , wherein the pattern of the raised latex coating is a plurality of diagonal lines extending across the top surface of the foundation in a first direction and a plurality of diagonal lines extending across the top surface of the foundation in a second direction. 
     
     
         11 . The gripper foundation of  claim 9 , wherein the sheet material is polyester. 
     
     
         12 . The gripper foundation of  claim 9 , wherein the raised pattern is approximately 0.013 inches thick. 
     
     
         13 . The gripper foundation of  claim 9 , wherein the sheet material is approximately 0.019 inches thick. 
     
     
         14 . The gripper foundation of  claim 9 , wherein the raised pattern covers the entire top surface of the foundation. 
     
     
         15 . The gripper foundation of  claim 9 , wherein the raised pattern covers only a perimeter of the top surface of the foundation from the outer edge of the foundation inward for approximately between 4 to 6 inches. 
     
     
         16 . The gripper foundation of  claim 9 , wherein the sheet material is sewn onto the foundation upholstery.