WAFER ZUR VERWENDUNG IM SELEKTIVEN VERBINDEN UND ABSCHLIESSEN VON KUNSTSTOFFSCHLÄUCHEN

摘要

A wafer (12) for use in the selective connecting and disconnecting of plastic tubes incorporates a fuse (26) in an aperture. The fuse is made of a three layer laminate (28) having light transmission characteristics which change after the wafer and its laminate have been heated. The three layers comprise two outer transparent layers and an intermediate layer having limited light transmission characteristics. When the wafer (12) is heated the intermediate layer (32) shrinks thereby changing the light transmission characteristics by providing a path for light to pass through the laminate without passing through the intermediate layer.