Textiles: fiber preparation – Working – Carding
Patent
1980-07-07
1982-10-12
Rimrodt, Louis
Textiles: fiber preparation
Working
Carding
19108, 19110, D01G 1582
Patent
active
043531490
DESCRIPTION:
BRIEF SUMMARY
The present invention concerns a flat cleaning system for a card equipped with a set of revolving flats, the individual flats of which are not in mutual contact, each flat consisting of a T-shaped profile. The legs of the flat are arranged on both sides and support a point clothing on their working surface. The web of the point clothing extends towards the inside of the flat room formed by the set of flats, and in this sytem the part of the revolving flat set located at the main drum is guided along the surface of the main drum.
On the cards equipped with the above mentioned set of flats the problem arises, that fine and finest fibre and dirt particles penetrate via the gaps between neighbouring flats. This occurs mainly in the part of the set of revolving flats located at the main drum into the inside room formed by the set of flats, where they can accumulate and form undesirable and dangerous fibre and waste accumulations. At the deflection points of the set of flats this accumulation can particularly take the form of fibre rolls.
According to a prior art solution to this problem (German DE-AS 11 18 662), penetration of fly waste and of dirt particles via the gaps between two stationary flats is prevented by providing seals which seal these gaps air-tight. A solution of this type, however, involves considerable disadvantages in practical use, because it is difficult to manufacture, as well as maintain, long, straight seals.
In another known flat cleaning system, German DE-PS12 92 551 an air stream is blown into the flat-inside room from one side and is sucked off on the opposite side via suction openings together with the fly waste and the dirt particles taken up by the air stream. However, this sytem has substantial disadvantages. Initially, it involves a high energy consumption since the effectiveness of the blown air stream is insured only if it extends over the full width of the flat-room which acts as an open room. Furthermore, such strong blown air streams generate an above atmospheric pressure, which, even if slight, is noticeable, in the flat-room. This is undesirable because air charged with fly waste and dirt particles is blown out of the flat room which, for design reasons, canot be hermetically sealed against the surrounding room. The air contamination caused by this air escape cannot comply with the dust content standards presently required in carding rooms. Furthermore, such strong concentrated air streams generate local air vortex formations and dead zones, in which fly waste and contaminations still can accumulate.
SUMMARY AND OBJECTS OF THE INVENTION
It is an object of the flat cleaning system according to the present invention to eliminate the above-mentioned disadvantages of the known devices of this type and to create a flat cleaning system, which effectively cleans the flat-room with low energy consumption, and avoids any air vortex formation and dead zones.
It is another object of the present invention to maintain in the flat-room a slight vacuum at all times and thus excludes any escape of fly waste and dust particles to the surrounding room.
These objects and others are achieved by a flat cleaning system of the type mentioned initially, in which the space between the webs of two neighbouring flats is temporarily sealed substantially air tight. The sealing element extends over the full length of the flats, forming a duct as the flats revolve. Also means for generating an air stream are coordinated to the duct.
By temporarily forming a duct enclosed by the legs and webs of two neighbouring flats and by the sealing element, optimum conditions for eliminating fly waste and dirt particles present in the duct room are established. Insofar as generation of the air stream is limited to the duct room and the duct dimensions are small in comparison to the whole flat-room, a relatively low energy consumption can be insured. As the duct formed is sealed substantially air tight against the flat room, the air stream acting in the duct does not influence the air present in the rest of the fla
REFERENCES:
patent: 2327349 (1943-08-01), Goldsmith
patent: 4075732 (1978-02-01), Araki et al.
patent: 4196497 (1980-04-01), Beneke et al.
patent: 4227285 (1980-10-01), Hamrick
Demuth Robert
Wuest Anton
Kleeman Werner W.
Rieter Machine Works Ltd.
Rimrodt Louis
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