B - Operations – Transporting – 65 – H
Patent
B - Operations, Transporting
65
H
242/36.2
B65H 81/00 (2006.01) D02G 3/36 (2006.01)
Patent
CA 1100114
METHOD AND APPARATUS FOR MANUFACTURING WRAPPED YARNS ABSTRACT Method and apparatus for producing high quality wrapped yarn by a wrapping operation wherein a binder strand, carried by a supply package supported by a rotatably driven hollow spindle, is fed to the free end of the hollow supply spindle and wrapped around a core strand moving through the hollow spindle. The binder strand inherently balloons outwardly in its path of travel from its rotating supply package to the core strand being wrapped. The zone in which the binder strand bal- loons is enclosed to isolate it from the ambient air about the wrapping apparatus to thereby substantially preclude pick up of fiber waste on the binder strand and thus prevent the form ation on the binder strand of imperfections or "flags" which result in loss of yarn product quality because of yarn break- age or entrapment in the wrapped yarn. Suction means communi- cates with the hollow spindle to attract the core yarn and facilitate passage of the wrapped yarn therethrough. Isolation of the zone in which the binder strand balloons is obtained by enveloping the package and balloon forming region of the bind- er strand with an enclosure. The top of the enclosure is pro- vided with an aperture to permit the delivery of core strand through the enclosure to the hollow spindle. Preferably, the inside margins around the enclosure aperture are designed to define with the adjacent end face of the hollow spindle an annular radially extending passageway for passage of the binder yarn, and means are provided to adjust the spacing between the hollow spindle end face and the aperture margins to optimize the exclusion of fiber waste from the ballooning zone.
329011
Gowling Lafleur Henderson Llp
Leesona Corporation
LandOfFree
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