Maschinenfabrik Rieter Ag

Rieter Machine Works, Ltd.

Erich Hohloch

Robert Demuth

Urs B Meyer

Christian Sauter

Peter Fritzsche

Giuseppe Verzilli

Roland Soltermann

Hansruedi Fehr

In order to grind clothing of a carding element, such as a cylinder of a textile machine, such as a card, during operation of the cylinder, a slide is moved back-and-forth across the clothing. The slide is reciprocated back-and-forth by an inner run of a drive belt guided in guides such that the drive belt together with a grinding element, like a grinding stone, closes a housing totally covering the arrangement. As a result, neither grinding dust nor fibers can enter the housing. Each time the grinding stone moves past a grinding member, such as a diamond rake or diamond roller this grinding stone is re-ground, so that the clothing is maintained sharpened by the continuous grinding operation and the grinding stone itself is cleaned or re-ground by the grinding member. Also, structure detects the degree of wear of the grinding element so that upon reaching a predetermined value such grinding element can be replaced.

Apparatus for grinding clothing, such as the clothing of a carding

In order to optimally control the air supply in a diverging gap between a card main cylinder and a doffer roll, an air guide plate with a predetermined spacing on the narrowest part between the air guide plate and the surface of the main cylinder and with an aperture angle is arranged close to the main cylinder so that a converging gap is provided between the air guide plate and the surface of the main cylinder. In this converging gap, a pressure head builds up in operation through the air conveyed from the surface of the main cylinder, which leads to an overflow over a nose of the air guide plate. This overflow helps the fleece, which is loosened from the main cylinder, to more easily reach the doffer surface. In order to control the quantity of overflowing air, the gap is to be determined by trial. The air passing through the gap may be taken up from a conduit shaped foot part, which can be connected to a vacuum source, for withdrawing particles of dirt which arrive in the conduit and, and to control the vacuum in the conduit. This pressure control may be effected through a throttle valve inserted between the conduit and a vacuum source. Subsequently, on the conduit, a series of card rods may be arranged in the direction of rotation of the main cylinder.

Device for assisting the transfer of a fleece from the card main

The cleaning apparatus for cleaning the set of flats of a revolving flats card has a shaft supported by a carrier. The shaft is pivotable about the lengthwise axis of the shaft together with a cleaning brush fixedly mounted on the shaft and extending over the width of the card. In accordance with the invention, the carrier is movably mounted on the card framework in such a manner that at the flats cleaning position the spacing of the path of movement of the cleaning brush from the set of flats is variable, whereby during the pivotal movement of the cleaning brush effecting cleaning of the flats clothing the spacing of the path of movement of the cleaning brush from the set of flats at the flats cleaning position is smaller than during the return movement of the cleaning brush. The cleaning apparatus affords the advantage of improved cleaning of the flats clothing. In a special embodiment, improved cleaning of the cleaning brush, and thus additional improvement in cleaning of the flats clothing, is also obtained.

Cleaning apparatus for cleaning the flats of a revolving flats card

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Winterthur, Switzerland

Erich Hohloch