Textiles: fiber preparation – Working – Carding
Patent
1989-07-24
1991-06-11
Schroeder, Werner H.
Textiles: fiber preparation
Working
Carding
19100, 19109, 19111, D01G 1508
Patent
active
050221213
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a carding machine or card comprising a carding drum and at least one carding element cooperating with said carding drum, and further including working elements cooperating with said carding drum and mounted for movement transversely of the direction of rotation of said carding drum for removing foreign matter from the fibre fleece, the working elements cooperating with an exhaustor device.
A carding machine of the type defined above is known from German Patent No. 2,624,367. The carding machine of this Patent has a carding flat and is in addition provided with a cleaning device consisting of a belt extending transversely of the direction of rotation of the carding drum and having its side facing towards the carding drum provided with a card cloth attached thereto. Cleaning devices of this type are disposed either upstream of a revolving flat or upstream or between stationary carding elements.
The cleaning belt is driven to revolve in a given direction and is intended to remove contaminations from the card fleece in a lateral direction. Disposed above the run of the cleaning belt facing away from the carding drum is an exhaustor nozzle for removing contaminations that have been picked up by the card cloth of the cleaning belt.
This known apparatus suffers from the disadvantage that the contaminations removed from the fibre material have to be transported over distances of different lengths as they are being removed by the cleaning belt. As a result, one side of the card fleece retains a smaller amount of contaminations than the other side after the fibre material has been transported by the carding drum past the cleaning device. The operation of this cleaning device additionally results in transverse displacements of the fibre material itself, resulting in a congestion of the fibre material and contaminations on one side of the carding drum. In order to avoid this, the known apparatus is provided with two cleaning belts disposed adjacent one another in the direction of rotation of the crading drum and revolving in opposite directions. This arrangement only results, however, that the congestion of fibre material and contaminations formed on one side of the carding drum is returned towards the center of the carding drum. An effective cleaning of the fibre material cannot be achieved in this manner.
Known from DE-OS No. 36 05 631 is a cleaning device comprising a reciprocating exhaustor pipe operable to clean the surface of a card roller when there is no fibre fleece supported thereon.
Additionally known from DDR Patent No. 16,154 is a carding machine, in which the doffer roller cooperates with a brush belt moving transversely of the direction of rotation of the doffer roller and having a brush lining intended to contribute in a simple manner to the formation of a tangled fleece.
It is an object of the invention to improve a carding machine or scribbler of the type defined in the introduction in a manner permitting even the most persistent contaminations from the fibre material as a uniform fleece is being formed. This object is attained according to the invention by the provision that the working elements, are designed as card elements each provided with a respective card cloth mounted for reciprocating movement transversely of the direction of rotation of the carding drum.
In this manner it is possible to positively remove contaminations from the fibre web, which may then be exhausted by the exhaustor apparatus without resulting in any appreciable displacements of the fibre material. The reciprocating carding elements rather contribute to a uniform distribution of the fibre material and thus to the formation of a uniform card fleece. The carding machine or scribbler according to the invention offers the particular advantage of permitting so-called "seed-coat fragments", i.e. seed shell fragments having fibres adhering thereto, and foreign fibres to be readily removed from the fibre material. The removal of such seed shell fragments from the fibre material is particularly diff
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Hollingsworth GmbH
Neas Michael A.
Schroeder Werner H.
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