Apparatus for the sorting or selection of a fibre sliver comprising textile fibres, especially for combing

Abstract

An apparatus for the sorting or selection of fibre, especially for combing, is supplied by supply device to a sorting device. Clamping devices are provided which clamp the fibre sliver at a distance from its free end, for combing in order to loosen and remove non-clamped constituents, such as, for example, short fibres, neps, dust and the like from the free end. To enable productivity to be increased and an improved combed sliver to be obtained, downstream of the supply there is arranged at least one rotatably mounted roller which is provided with clamping devices for the fibre sliver, which clamping devices are distributed spaced apart around the periphery of the roller, and combing elements are associated with the periphery of the roller.

1 . An apparatus for the sorting or selection of a fibre structure comprising textile fibres which is supplied by means of a supply device to a sorting device, wherein the sorting device comprises:
 at least one rotatably mounted roller, arranged downstream of the supply device, that rotates rapidly without interruption;   clamping devices which can clamp a portion of the fibre at a distance from its free end;   a mechanical combing device comprising at least one combing element which generates a combing action from the clamping site to the free end of the fibre in order to loosen and remove non-clamped constituents from the free end;   
     wherein the clamping devices are provided on said at least one rotatably mounted roller distributed spaced apart in the region of the roller periphery, and the at least one combing element is associated with the periphery of the roller. 
   
   
       2 . An apparatus according to  claim 1 , in which the clamping devices co-operate with combing elements located opposite the periphery of the roller and spaced therefrom. 
   
   
       3 . An apparatus according to  claim 1 , in which, during combing-out, the fibre sliver being combed out is in engagement with a clamping device and with a combing element. 
   
   
       4 . An apparatus according to  claim 1 , in which the supply device comprises one or more of: a roller having clothing or needles; a circulating comb element; two endlessly circulating belts; at least two feed rollers; and a slow-speed feed roller and a feed table. 
   
   
       5 . An apparatus according to  claim 1 , in which a top comb is arranged between the supply arrangement and the rotatable roller. 
   
   
       6 . An apparatus according to  claim 1 , in which the supply device conveys the fibre lap continuously, and a separation device is provided to separate the fibre lap delivered by the supply device stepwise into individual fibre tufts. 
   
   
       7 . An apparatus according to  claim 1 , in which there is a first roller provided with first clamping devices distributed spaced apart around its periphery and a second roller provided with second clamping devices distributed spaced apart around its periphery. 
   
   
       8 . An apparatus according to  claim 7 , in which the first clamping devices and the second clamping devices each have a rotatably or displaceably mounted gripping element. 
   
   
       9 . An apparatus according to  claim 8 , in which the first and second clamping devices each have a fixedly mounted counter-element or a movably mounted counter-element. 
   
   
       10 . An apparatus according to  claim 1 , in which there is a relative movement between the clamping devices of the first roller and the supply device. 
   
   
       11 . An apparatus according to  claim 7 , in which, when transferring the fibre bundles from the first roller to the second roller, the first clamping elements and the second clamping devices co-operate. 
   
   
       12 . An apparatus according to  claim 7 , in which the first roller and the second roller rotate in opposite directions to one another. 
   
   
       13 . An apparatus according to  claim 7 , in which the second clamping devices co-operate with further combing elements, which are arranged at a distance from the outer periphery of the second roller. 
   
   
       14 . An apparatus according to  claim 7 , in which the combing device has endlessly circulating comb elements on a revolving top device, associated with the second roller. 
   
   
       15 . An apparatus according to  claim 14 , in which the comb elements run in the same direction as the clamped fibre tufts and the speed ratio between the second roller and the top device circulation is greater than 1. 
   
   
       16 . An apparatus according to  claim 15 , in which the combing device has at least one rotating circular comb roller with combing elements around its periphery. 
   
   
       17 . An apparatus according to  claim 7 , further comprising a take-off roller associated with the second roller upon which combed fibre tufts can be pieced. 
   
   
       18 . An apparatus according to  claim 17 , in which the outer cylindrical surface of the take-off roller has air-passage openings and in which the interior of the take-off roller is connected to a source of negative pressure. 
   
   
       19 . An apparatus according to  claim 18 , in which a portion of the inner cylindrical surface of the take-off roller is sealed by a screen element. 
   
   
       20 . An apparatus according to  claim 1 , in which a drive device is provided for moving the clamping devices, and a cam gear is arranged between the drive device and the clamping devices. 
   
   
       21 . An apparatus according to  claim 1 , further comprising a cleaning device comprising a cleaning roller and an extraction device associated with the cleaning roller. 
   
   
       22 . An apparatus according to  claim 7 , in which, for the suction of the supplied slivers, at least one suction device is associated with the clamping devices in the region of the take-up of the fibre sliver from the supply device to the first roller and/or in the region of the take-up of the fibre material from the first roller to the second roller. 
   
   
       23 . An apparatus according to  claim 7 , in which, at least one blowing opening is provided in the region of the delivery of the fibre sliver from the supply device to the first roller and/or in the region of the delivery of the fibre material from the first roller to the second roller.