Textiles: fiber preparation – Working – Carding
Patent
1987-12-09
1989-09-26
Schroeder, Werner H.
Textiles: fiber preparation
Working
Carding
19233, D01H 7895
Patent
active
048689521
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an opening cylinder having opening combs on its peripheral surface.
An opening cylinder of this type is described in the British patent specification 1 556 090. The spines of the opening combs, which have a predominantly circular cross section, are mounted in corresponding grooves of the cylinder for rotation about their longitudinal axes and are held at a predetermined tilt by interchangeable, removable plates of specific shape. Instead of keeping several opening cylinders at the bearing with different needle inclinations for different fiber materials, it is sufficient with this conventional device to have different plates at the bearing for different needle inclinations. This known opening cylinder is, however, so expensive to manufacture that it is more economical to keep an appropriate opening cylinder at the bearing for each fiber material. Its advantage is that the cylinder need not be discarded when needles become defective but that, instead, the opening combs can be individually changed without renewed balancing of the cylinder.
Other opening cylinders of this type are described, for example, in the German publication 2 045 863, the German publication 2 159 230, the German publication 2 520 706, the European patent application 178 614, CS-A 161 414, the Czechoslovakian publication CS-A 161 415, the Japanese publication 46-24661, the Japanese publication 51-53297, the Japanese publication 57-74987 and the Japanese publication 61-59676. In order to improve opening of the fibers and thereby reduce the number of defects in the subsequently spun yarn, various means have been proposed to facilitate stripping of the fibers from the opening cylinder and advancement to the spinning rotor. To this end, the Czechoslovakian publication CS-A 161 414, for instance, illustrates toothed ejecting elements which are disposed between the opening combs. In this manner, the friction between the fibers and the spines of the combs is also to be reduced and, for this purpose, the spines of the toothed ejecting elements project radially beyond the peripheral surfaceof the cylinder to a greater extent than the spines of the opening combs. In the opening cylinder of the Czechoslovakian publication CS-A 161 415, consecutive opening combs project radially beyond the peripheral surface of the cylinder by an increasing distance so that the fibers are forcibly moved outwards and thus are more easily separated from the opening cylinder. Similarly, it is known to provide the peripheral surface of the cylinder with radial holes (e.g., French publication 1 295 871) in order to separate the fibers from the opening cylinder with radical air currents.
All of the proposals contained in the above prior art have, however, brought only slight improvements in yarn produced by the open spinning process.
The object of the present invention is to improve an opening cylinder of the foregoing type in such a manner that an improvement in quality can be obtained therewith for different yarns produced by the open spinning process while maintaining the advantage of a simple construction.
In accordance with the invention, this object is achieved by having the comb spines project uniformly beyond the peripheral surface of the opening cylinder.
The invention is described by way of example with reference to the accompanying schematic drawings where:
FIG. 1 is a perspective exploded view of an opening cylinder,
FIG. 2 is a fragmented view in the direction of the arrow II of FIG. 1,
FIG. 3 is an enlarged illustration of a fragment of an opening comb viewed in the direction of arrow III of FIG. 2,
FIG. 4 is a view similar to FIG. 2 of a second exemplary embodiment of the opening comb,
FIG. 5 is a view of an opening comb according to FIG. 4 in the direction of the arrow V,
FIG. 6 is a fragment of a third exemplary embodiment of an opening comb viewed in accordance with the arrow III of FIG. 2,
FIG. 7 is a fragment of a fourth exemplary embodiment of an opening comb viewed according to the arrow III of FIG. 2, and
FIG. 8 is a
REFERENCES:
patent: 2115605 (1938-04-01), Allen et al.
patent: 2832098 (1958-04-01), Mee
patent: 3646639 (1972-03-01), Burckhardt et al.
patent: 4625366 (1986-12-01), Egerer
patent: 4627131 (1986-12-01), Iwata
Buess Heinz
Saporta Jose A.
Kontler Peter K.
Schroeder Werner H.
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