Apparatus for making a mineral wool web, comprising:
- (a) a receiving conveyor having a generally horizontal, upwardly presented carrying run which advances longitudinally in a given direction;
- (b) a pendulum-type conveyor arrangement which includes two generally vertically arranged endless conveyor belts which are disposed laterally adjacent one another, relative to said given direction, above said carrying run of said receiving conveyor, with respective carrying runs disposed in spaced, confronting relation, with the endless conveyor belts respectively entrained about respective upper and lower rollers rotating in respective directions to cause said spaced, confronting carrying runs of said endless conveyor belts to advance downwardly towards said carrying run of said receiving conveyor, whereby said pendulum-type conveyor has a carrying gap with an upper inlet end and a lower outlet end;
- (c) means for oscillating said pendulum-type conveyor assembly transversally of said given direction so as to reversingly sweep said outlet end of said carrying gap from adjacent one side edge of said carrying run of said receiving conveyor, to adjacent an opposite side edge of said carrying run of said receiving conveyor;
- (d) means for continuously feeding a primary web of uncured mineral wool into said inlet end of said carrying gap between said carrying runs of said endless conveyor belts of said pendulum-type conveyor arrangement, whereby said primary web is fed downwards by said carrying runs of endless conveyor belts and out onto said carrying run of said receiving conveyor so as to progressively provide on said carrying run of said receiving conveyor a multiple layer web of successively laid zig-zag folds of said primary webs of uncured mineral wool advancing in said given direction;
- (e) means for movably supporting said endless conveyor belts so that during substantially all of each half cycle of oscillation of said pendulum-type conveyor assembly, in which a respective one of said endless conveyor belt leads and a respective other said endless conveyor belt trails said carrying gap, and for causing the respective said trailing endless conveyor belt to have said lower roller thereof disposed closer to, yet spaced above, said carrying run of said receiving conveyor than is said lower roller of the respective said leading endless conveyor belt.