Variable pressure bed roller

Claim 1

In a variable pressure bed roller for calendering sheets of pliable materials which roller comprises in combination a rotatable shaft, a pair of axially spaced, rigid, circular closure members of substantially equal diameters mounted on said shaft, an elastomeric, fluid-impervious, cylindrical shell having an internal diameter substantially equal to the diameters of and extending between said closure members, said shell including cord reinforcement throughout the length thereof, first means providing fluid tight mounting of said closure members on said shaft, and second means providing a fluid tight connection between said shell and said closure members, the improvement wherein said cord reinforcement in said shell consists essentially of a. at least one inner cylindrical layer of spaced, substantially mutually parallel cords aligned substantially parallel to said shaft, said layer extending from one closure member to the other and b. an even number of distortion resistant, cylindrical layers of spaced substantially mutually parallel cords aligned at alternating substantially equal acute angles relative to a plane perpendicular to said shaft, said even number of layers bonded to and spaced radially outwardly from said at least one inner layer and extending from one closure member to the other.