Patent ID: 7640611

Claim:
A mattress assembly, comprising: an encasement including a base and a plurality of side walls joined together to define an interior cavity, each sidewall having an interior surface, a top surface and an outer surface, the outer surface of the sidewalls defining a perimeter of the encasement; an innerspring unit having a top surface and comprising multiple springs contained within the interior cavity of the encasement; a border assembly attached to, and extending about, the perimeter of the encasement, the border assembly having an upper end portion extending above the top surfaces of the sidewalls; and an upholstery assembly layer lying only within the border assembly, and extending from the top surface of one sidewall to the top surface of the other sidewalls and comprising a) a first layer of material adjacent the top surface of the innerspring unit and b) at least one additional overlying layer, wherein none of said layers of material are placed in tension and the springs of the innerspring unit react independently of each other in response to the weight of a person, without the constraints of the upholstery assembly layer.