Abstract: Apparatus for successively winding continuous strips of material into rolls includes one or a pair of spaced outstanding guide frames each having an outer frame member and an inner frame member defining upper and lower horizontal tracks for guiding slide bearings coupled to winding shafts. The inner frame member comprises a shiftable rectangular bar which is shifted rearwardly to define a forward vertical guide track interconnecting the horizontal tracks, and which is shifted forwardly to define a rearward vertical track interconnecting the horizontal tracks.

Abstract: An extrusion die having an adjustable lip opening through which thermoplastic material is forced to form a flat sheet. Fine adjustment of the lip is effected thermally and without play by the provision of an element or a heating or cooling block which braces the lip. Coarse adjustment is effected manually, and without play, by operation of a pair of bolts. One bolt axially shifts the block, and the other bolt tightens the block against the die body.