Patent ID: 6881362

Claim:
A process for the relaxation of interlayer sheet comprising: (a) heating the interlayer sheet ( 1 ) to a temperature from about 30° C. to about 75° C.; (b) leading the interlayer sheet from step (a) over an air-cushion table ( 3 ) to thus induce relaxation and cooling whereby the exit temperature of the sheet is in the range of from 20° C. to 45° C.; (c) regulating the tension of the interlayer sheet on the air-cushion table by varying the weights of the catenary loop ( 5 ) with the aid of a continuous depth measurement ( 6 ); and (d) cooling the relaxed interlayer sheet ( 8 ) from step (c) to a temperature as can be required considering the subsequent use of the relaxed interlayer sheet.