Textiles: fiber preparation – Stapilizing – Combined
Patent
1981-03-10
1983-06-28
Rimrodt, Louis
Textiles: fiber preparation
Stapilizing
Combined
19 06, 19150, 19288, D01G 104, D01G 106, D01H 572
Patent
active
043897525
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention concerns a method for producing a draftable staple fibre sliver, in which a strand of endless, parallel filaments of oblong cross-section continually is transported in its longitudinal direction, at intervals is cut under an acute angle relative to its longitudinal direction and in this process is separated into parallelogram-shaped sections, and that this strand separated into sections during this manner is united at both its sides and is condensed and transformed into a staple fibre sliver of approximately circular cross-section.
From Swiss Pat. No. 300 885 there is known the transformation of a fibre layer consisting of endless filaments into a transportable and draftable staple fibre sliver. In this process the flat fibre layer always is advanced in its longitudinal direction and periodically is cut. Subsequently it is united from both sides and is condensed. By cutting the fibre layer in a direction under an angle to the longitudinal direction parallelogram-shaped sections of the fibre layer are formed.
It has been found by experience that at the forwardmost points, as seen in the direction of sliver movement, of the individual sliver sections, the cut fibre ends pointed or directed towards the front stick out laterally and form fibre points or tips. These disturb the further processing of the fibre sliver and cause defective points or regions in the sliver, or the roving respectively, produced in the further processing steps, such that the quality of the end products produced therefrom is impaired. Further they cause increase of fly waste in the processing room. Also they increase the danger of clogging at the sliver funnels, and thus, deteriorate the reliability of the subsequent machines.
SUMMARY OF THE INVENTION
It thus is and important object of the present invention to eliminate these disadvantages. This invention is characterized in that the zone of the staple fibre sliver along a sleeve line or generatrix, along which in uniting and condensing of the strand the forwardmost points, as seen in the direction of the sliver movement, of the parallelogram-shaped sections are aligned, is inserted continually into the inside of the sliver, a staple fibre sliver of approximately kidney-shaped cross-section being formed.
The present invention furthermore concerns an apparatus for implementing the above mentioned method, with a uniting and condensing point or location for a lateral uniting and condensing of the strand. This apparatus is characterized in that in the path of the staple fibre sliver of approximately circular cross-section a rolling-in roll with a disc is provided, which in the zone of the sleeve line or generatrix protrudes into the inside of the staple fibre sliver.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be better understood and objects other than those set forth above, will become apparent when consideration is given to the following detailed description thereof. Such description makes reference to the annexed drawings wherein:
FIG. 1 is a schematic view serving for explaining the function;
FIG. 2 is an exemplary embodiment of the rolling in-roll; and
FIG. 3 illustrates a further embodiment of this roll.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
In FIG. 1 cutting points or locations 11 are shown, at which a strand 12 consisting originally of endless, parallel filaments, and which is transported continually in the direction of arrow 13, is cut. Cutting can be effected, e.g. by knives extending helically on a roll, which are not shown in the drawing, as they do not concern the present invention. The strand 12 is of oblong or elongate cross-section, as indicated by the cross-section 15 at the point or location 14. It should be recognized that by the cutting operation parallelogram-shaped sections are produced, limited by the cutting points 11 and the lateral edges 16 of the strand 12. It is unavoidable that cutting causes the fibre ends at the cutting points or locations 11 to form points or tips 17 laterally s
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Briner Emil
Clement Heinz
Eberli Heiner
Kleeman Werner W.
Rieter Machine Works Limited
Rimrodt Louis
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