US3901012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and device for processing fibrous material
Assignee: Elitex Zavody Textilniho
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Filing: 1974-06-05
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Granted: 1975-08-26
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Expires: 1994-06-05
Abstract
Abstract Method of and apparatus for processing fibrous material to yarn by cooperation of an electrostatic field. Fibers are caught after opening, are parallelized on a doubling means by the action of an electrostatic field and are continuously withdrawn therefrom by a rotating free end of yarn. The rotation of the free end of yarn is exerted by a twisting means acting upon the yarn to be formed beyond the zone of connection of the fibers to the rotating end of yarn.
Inventors
- 👤 Vaclav Safar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:29
CPC Classifications
D; D01; D01H; D01H4/00; D01H4/28
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
97 words
A method of processing fibers to a yarn by cooperation of an electrostatic field, comprising opening the fibers, retaining and parallelizing the opened fibers on a doubling means by the action of an electrostatic field, and continuously withdrawing the parallelized fibers from the doubling means at a zone in which the fibers are connected to a rotating free end of yarn, the rotation of the free end of yarn being performed by a twisting means acting upon the yarn being formed beyond the zone at which the fibers are connected to the rotating free end of yarn.
Claim 2
Independent Claim
97 words
A method of processing fibers to a yarn by cooperation of an electrostatic field, comprising opening the fibers, retaining and parallelizing the opened fibers on a doubling means by the action of an electrostatic field, and continuously withdrawing the parallelized fibers from the doubling means at a zone in which the fibers are connected to a rotating free end of yarn, the rotation of the free end of yarn being performed by a twisting means acting upon the yarn being formed beyond the zone at which the fibers are connected to the rotating free end of yarn.
Claim 3
Dependent Claim
22 words
A method as claimed in claim 1, wherein the twisting means is separate and apart from the means forming the electrostatic field.
Claim 4
Dependent Claim
34 words
A method as claimed in claim 1, wherein the parallelized and straightened fibers are fed to the spinning point of the twisting means in a direction transverse to the longitudinal axis of the fibers.
Claim 5
Dependent Claim
25 words
A method as claimed in claim 1, wherein the axis of the fibers is parallel to the axis of the yarn at the spinning point.
Claim 6
Dependent Claim
24 words
A method as claimed in claim 1, wherein the axis of the fibers forms an angle with respect to the axis of the yarn.
Claim 7
Dependent Claim
28 words
A method as claimed in claim 1, wherein the rotating free end of yarn is thrust into contact with the doubling means by the action of electrostatic forces.
Claim 8
Dependent Claim
28 words
A method as claimed in claim 1, comprising limiting the diameter of the rotating free end of the yarn by contacting it with a fixed yarn engaging means.
Claim 9
Dependent Claim
29 words
A method as claimed in claim 1, wherein the direction of rotation of the free end of yarn is parallel to the direction of movement of the doubling means.
Claim 10
Dependent Claim
29 words
A method as claimed in claim 1, wherein the direction of rotation of the free end of yarn is opposite to the direction of movement of the doubling means.
Claim 11
Dependent Claim
30 words
A method as claimed in claim 1, wherein the sequence of fibers on the doubling means is different from the sequence of fibers in the fibrous material before its processing.
Claim 12
Dependent Claim
35 words
A method as claimed in claim 1, wherein the sequence of the fibers and the group situated on the doubling means is formed by random distribution of fibers on at least 30% of its surface.
Claim 13
Dependent Claim
26 words
A method as claimed in claim 1, wherein the sequence of fibers in the group on the doubling means is formed according to a predetermined program.
Claim 14
Dependent Claim
55 words
A method as claimed in claim 1, comprising passing the fibers after they have been separated through a homogenizing space, and increasing the evenness of flow of the fibers before depositing them on the doubling means by retarding their flow to at least one-fifth of their speed at the exit from the fiber separating device.
Claim 15
Dependent Claim
32 words
A method as claimed in claim 1, wherein the spinning of fibers from the electrostatic field is performed by fastening them to a continuous thread and subsequently twisting them around said thread.
Claim 16
Dependent Claim
93 words
Apparatus for processing fibers to yarn by cooperation of an electric field comprising means for opening the fibers, means for retaining and parallelizing the opened fibers on a doubling means by the action of an electrostatic field, and means for continuously withdrawing the parallelized fibers from the doubling means, means for rotating the free end of a yarn, said last named means including a twisting means acting upon the yarn to be formed beyond the zone at which the parallelized fibers from the doubling means are connected to the rotating end of yarn.
Claim 17
Dependent Claim
93 words
Apparatus for processing fibers to yarn by cooperation of an electric field comprising means for opening the fibers, means for retaining and parallelizing the opened fibers on a doubling means by the action of an electrostatic field, and means for continuously withdrawing the parallelized fibers from the doubling means, means for rotating the free end of a yarn, said last named means including a twisting means acting upon the yarn to be formed beyond the zone at which the parallelized fibers from the doubling means are connected to the rotating end of yarn.
Claim 18
Dependent Claim
65 words
Apparatus as claimed in claim 15, wherein the doubling means is mounted beyond the fiber opening device and is formed by opposed electrodes connected to a source of static electricity, and wherein the axis of rotation of the twistiNg means acting upon the yarn beyond the zone of connecting the fibers to the free end of the yarn is directed toward one of said electrodes.
Claim 19
Dependent Claim
22 words
Apparatus as claimed in claim 16, wherein said electrodes are formed by elements which are at least parts of bodies of revolution.
Claim 20
Dependent Claim
16 words
Apparatus as claimed in claim 16, wherein the electrodes comprise at least portions of continuous belts.
Claim 21
Dependent Claim
30 words
Apparatus as claimed in claim 16, comprising a device for forming a sequence of fibers according to a predetermined program disposed between the fiber opening device and the electrostatic field.
Claim 22
Dependent Claim
55 words
Apparatus as claimed in claim 19, wherein the device for forming a sequence of fibers according to a predetermined program is made in the form of a homogenizing space having a cross sectional area which is at least five times greater than the cross sectional area of the exit passage from the fiber separating device.
Claim 23
Dependent Claim
29 words
Apparatus as claimed in claim 20, comprising a nozzle opening into the homogenizing space for feeding a processing fluid which homogenizes the flow of fibers through said homogenizing space.
Claim 24
Dependent Claim
29 words
Apparatus comprising a plurality of processing units as defined in claim 19, and wherein the homogenizing space is common to the twisting means of said plurality of processing units.
Claim 25
Dependent Claim
35 words
Apparatus as claimed in claim 16, wherein the axis of the twisting means forms an angle within the range from 0*-80* with respect to the longitudinal axis of the fibers at the point of spinning.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |