Abstract: The invention reports a process and a device to form a stack of grouped pieces of material on a base, in which a free end of a continuous separating strip serving to separate the groups is secured in the region of the base, and between groups of pieces of material forming the stack with the alternating placement of groups of material and sections of the separating strip continued until the last group of pieces of material is placed on the stack.

Abstract: To enable prescribed functional values of pressure plate units of motor vehicle friction clutches to be observed with smaller tolerances than hitherto, it is proposed that a housing-spring component initially be pre-assembled from clutch housing (1) and diaphragm spring (7) and that this component be measured together with a master pressing plate. Geometry (diameter 25 and axial height 27) which is optimum for minimum tolerances of a contact bevel 15 is calculated by means of the measured result, and a pressing plate (13) with this bevel geometry is produced. The measured spring-housing component is finally assembled together with this specially produced pressing palte 913).