Applied Through Stirrup And Saddle Patents (Class 19/273)
  • Patent number: 4413378
    Abstract: The present invention concerns a method for processing a fiber sliver in a drafting arrangement, and a drafting arrangement for implementing the method. The objective for a drafting arrangement, which can be adapted to a wide range of staple lengths, to draft a fiber sliver at high speeds, has led to the following features of the invention:(a) The fiber sliver is deflected simultaneously in the drafting process systematically in such a manner that, the fiber sliver can be inserted into the subsequently arranged funnel and the subsequently arranged pair of calender rolls without further deflection.(b) All bottom rolls are fixedly arranged.(c) The first pressure rolls limiting the pre-drafting zone and the main drafting zone, respectively, are arranged to be shiftable along an arc about the rotational axis of the corresponding bottom roll in such a manner that the drafting zones are adaptable to the fiber length.
    Type: Grant
    Filed: March 29, 1982
    Date of Patent: November 8, 1983
    Assignee: Rieter Machine Works Limited
    Inventors: Gerhard Mandl, Giancarlo Mondini, Viktor Pietrini, Kurt Weber, Rudolf Wildbolz