Textiles: fiber preparation – Working – Carding
Utility Patent
1999-09-30
2001-01-02
Neas, Michael A. (Department: 3741)
Textiles: fiber preparation
Working
Carding
C019S102000
Utility Patent
active
06167594
ABSTRACT:
CROSS REFERENCE TO RELATED APPLICATION
This application claims the priority of German Application No. 198 44 789.2 filed Sep. 30, 1998, which is incorporated herein by reference.
BACKGROUND OF THE INVENTION
The invention relates to a cleaning device for the travelling flats forming part of a carding machine. The accumulated strip material composed generally of fibers and dirt particles entrained by the travelling flats or by the points of the flat clothings is conventionally removed by a rotary flat brush, while between the flat brush and the travelling flats which are moved by means of at least one endless, circulating drive element, a relative motion towards and away from one another takes place.
In a carding machine having a travelling flats assembly the flat bars are, in the cleaning direction, freed from the “flat bar strip” (trash, nep-containing fibers, short fibers and other impurities) which, during the carding process, is transferred from the main carding cylinder to the clothing of the flat bars. In practice, for performing the cleaning process, a slowly rotating clothed stripping roll is brought into contact with the flat bar clothings and the stripping roll lifts off the flat bar strip or fiber cake from the flat bar clothing and directly or indirectly transfers it to a removing suction stream. The quality of the cleaning depends primarily from the accuracy of the setting of the distance of the cleaning roller (cleaning brush) from the flat bars.
German Offenlegungsschrift (application published without examination) 38 28 581 to which corresponds U.S. Pat. No. 4,996,746, discloses a cleaning device in which the cleaning brush may be movable towards and away from the travelling flats. It is a disadvantage of the conventional cleaning device that the brush drive co-travels with the flat brush which involves a complex technological outlay. It is a further drawback of the known arrangement that an excessively large mass has to be moved with the cleaning brush and its drive.
SUMMARY OF THE INVENTION
It is an object of the invention to provide an improved cleaning device of the above-outlined type from which the discussed disadvantages are eliminated and which, in particular, is structurally simple, permits a reduced movement of masses and makes possible a more accurate setting between the cleaning brush roller and the flat bars.
This object and others to become apparent as the specification progresses, are accomplished by the invention, according to which, briefly stated, the carding machine includes a main carding cylinder, a travelling flats assembly having a plurality of flat bars provided with a clothing cooperating with the clothing of the main carding cylinder; an endless flat bar driving element trained about end sprockets and circulating the flat bars in an endless path; a flat cleaning device supported at a location above the flat bar driving element and including a rotatably supported flat brush roller. A shifting device is provided for raising the flat bar driving element and the flat bars situated at the location towards the flat brush roller for establishing a contacting relationship between the flat brush roller and the clothing of the respective flat bars and for lowering the flat bar driving element and the flat bars situated at the location away from the flat brush roller for discontinuing a contacting relationship between the flat brush roller and the clothing of the respective flat bars.
By providing that the flat bar driving element is, with the flat bars, movable in the direction of the flat brush roller, the drive elements for the flat brush roller
as opposed to conventional devices—need not be displaced, so that a significantly simplified structure and operating system may be obtained. It is a further advantage of the invention that with the flat bar driving element, including the flat bars, a significantly lesser mass is moved which also results in a structural simplification and, at the same time, makes possible a more accurate setting of the distance between the cleaning brush roller and the flat bars. The flat bar driving element is preferably a flexible belt which can slightly expand, making the intended local engagement with the cleaning brush roller possible.
The invention has the following additional advantageous features:
The flat brush roller rotates slowly, for example, with an rpm of 4-8.
The flat brush roller is associated with a brush cleaning roller rotated, for example, with an rpm of approximately 1,110 to 1,400.
A setting device is provided for shifting the flat bar driving element, and the setting device has a fine-adjustment screw to set the shifting path between approximately 1-3 mm.
The endless circulating flat bar driving element is a flexible belt.
The brush cleaning roller is stationarily supported.
The flat bars are movable along a shifting path which causes a distance change between the flat brush roller and the flat bars.
The shifting path is not perpendicular to the travelling direction of the flat bars.
The shifting device for the flat bar driving element is disposed in the region of the flat brush roller.
REFERENCES:
patent: 1975741 (1934-10-01), Clark
patent: 3529326 (1970-09-01), Nutter et al.
patent: 4368561 (1983-01-01), Trutzschler
patent: 4759102 (1988-07-01), Verzilli et al.
patent: 4771514 (1988-09-01), Verzilli
patent: 4996746 (1991-03-01), Verzilli et al.
patent: 29 26 261 (1981-01-01), None
patent: 38 28 581 (1990-03-01), None
patent: 38 34 452 (1990-04-01), None
patent: 297 11 657 U (1997-10-01), None
patent: 180178 (1922-05-01), None
patent: 841363 (1960-07-01), None
Kelemen Gabor J.
Neas Michael A.
Tr{umlaut over (u)}tzschler GmbH & Co. KG
Venable
Welch Gary L.
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