| 摘要 |
A plurality of lower rolls are rotatably mounted in a machine frame below a crosshead thereof, which carries a plurality of nuts that are mounted for rotation on spaced apart vertical axes. A plurality of thrust screws are in threaded engagement with and depend from respective ones of said nuts. A plurality of spherical bearing parts are carried by respective ones of said thrust screws below said nuts. An upper yoke assembly is disposed above said lower rolls and comprises a plurality of spherical bearing sockets in mating engagement with respective ones of said spherical bearing parts to support said yoke assembly on said thrust screws. A plurality of upper yokes are rotatably mounted in said upper yoke assembly and disposed above said lower rolls and define nips therewith. Means are provided for rotating at least one of said thrust screws relative to the nut associated therewith independently of another of said thrust screws. Means are provided for rotating at least one of said thrust screws relative to the nut associated therewith in unison with another of said thrust screws. |
