| 摘要 |
Apparatus on a flat card or roller card comprises at least one working element 14 and/or cover element arranged opposite and spaced apart from a clothed roll 4 and extending over the width of the roll. The element has an elongate carrier member comprising a foot and a back, the foot facing towards the roll absorbs operating heat and the back facing away from the roll is in contact with ambient air. To allow adjustment of the working element and/or cover element to different fibre materials and operating circumstances or conditions and to enable the carding nip to be constant, thermal energy is supplied to the back preferably to provide a largely homogeneous temperature distribution having a very small or no temperature gradient in the carrier member. The working element may comprise a fixed card or a revolving flat assembly. In the case of a revolving flat assembly the thermal energy may be supplied by a heating zone which makes brushing contact with the backs of several flats and is preferably confined to the flat entry region. The heating zone may comprise one or more blankets 27 with which a temperature profile may be established over the working width to counteract different temperature gradients
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