US3744231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for freeing drafting rolls of adhering fibers
Assignee: Electrospin Corp
•
Filing: 1971-04-19
•
Granted: 1973-07-10
•
Expires: 1991-04-19
Abstract
Abstract In an open end textile spinning apparatus having an electrostatic field established between fiber feed rolls and a fiber spinning head by which fiber is attracted from the fiber feed rolls towards the spinning head, the improvement comprising an alternating current source having a predetermined frequency operatively connected to one of the fiber feed rolls to effect rapid oscillation of the electrostatic field and electrical vibration of fibers adhering to the fiber feed rolls. If desired, a d.c. source can be added to the a.c. source to bias the electrostatic field potential lines of force closer to the roll surfaces. A method of using the apparatus comprises establishing an electrostatic field between the fiber feed rolls, which serve as a first electrode, and a fiber spinning head, which serves as a second electrode, and simultaneously applying an alternating current of predetermined frequency to at least one of the rolls. This causes the electrostatic field to oscillate between the rolls, which field oscillation electrically vibrates fiber adhering to the rolls. In addition, the positive a.c. potential cycle causes the fibers clinging to the cot, or upper delivery roll, to be repelled from it. When the a.c. potential cycle reverses, the fibers clinging to the lower delivery roll are attracted towards the cot roll. Once free of the roll surfaces, the fibers are drawn into the electrostatic field.
Inventors
- 👤 L Tannas
- 👤 P York
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:38
CPC Classifications
D; D01; D01H; D01H4/00; D01H4/28; D01H4/04; D01H4/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
92 words
In an open end textile spinning apparatus having an electrostatic field established between fiber feed means and a fiber spinning means by which fiber is attracted from said fiber feed means towards said spinning means, the improvement comprising: circuit means connected to at least one of said fiber feed means and said fiber spinning means, said circuit means producing a signal which causes periodic variations in said electrostatic field in order to cause vibration of fiber adhering to said fiber feed means, whereby said fiber feed means is freed of adhering fiber.
Claim 2
Dependent Claim
92 words
In an open end textile spinning apparatus having an electrostatic field established between fiber feed means and a fiber spinning means by which fiber is attracted from said fiber feed means towards said spinning means, the improvement comprising: circuit means connected to at least one of said fiber feed means and said fiber spinning means, said circuit means producing a signal which causes periodic variations in said electrostatic field in order to cause vibration of fiber adhering to said fiber feed means, whereby said fiber feed means is freed of adhering fiber.
Claim 3
Dependent Claim
31 words
The invention as defined in claim 1 wherein said circuit means comprises a voltage source generating an alternating current signal, and means connecting said voltage source wijh said fiber feed means.
Claim 4
Dependent Claim
34 words
The invention as defined in claim 2 wherein said fiber feed means is a pair of drafting rolls, one of said rolls being driven about a stationary axle by the other of said rolls.
Claim 5
Dependent Claim
25 words
The invention as defined in claim 3 wherein said one roll has a dielectric surface and said stationary axle is connected to said circuit means.
Claim 6
Dependent Claim
30 words
The invention as defined in claim 2 wherein said circuit means further includes a direct current voltage source applied to said alternating current voltage source to bias said electrostatic field.
Claim 7
Dependent Claim
76 words
In an open end textile spinning process using an electrostatic field to transport fiber from fiber feed means to fiber spinning means, the method of freeing said fiber feed means of adhering fiber comprising: establishing an electrostatic field between said fiber feed means and said fiber spinning means; and applying an alternating current signal to said fiber feed means to effect oscillation of said electrostatic field and vibration of fiber adhering to said fiber feed means.
Claim 8
Dependent Claim
76 words
In an open end textile spinning process using an electrostatic field to transport fiber from fiber feed means to fiber spinning means, the method of freeing said fiber feed means of adhering fiber comprising: establishing an electrostatic field between said fiber feed means and said fiber spinning means; and applying an alternating current signal to said fiber feed means to effect oscillation of said electrostatic field and vibration of fiber adhering to said fiber feed means.
Claim 9
Dependent Claim
44 words
The method as defined in claim 6 further comprising using a pair of drafting rolls, one of which rolls is mounted on a conductive axle and has a dielectric surface as the fiber feed means, and applying said alternating current to said conductive axle.
Claim 10
Dependent Claim
23 words
The method as defined in claim 6 further comprising biasing said electrostatic field by applying a direct current to said fiber feed means.
Claim 11
Dependent Claim
171 words
Apparatus for spinning textile fibers, comprising: a. fiber feed means having a distribution end; b. fiber twisting means spaced from said feed means and having an axial inlet generally directed toward said discharge end of said feed means for receiving fibers discharged by said feed means; and c. a variable electrical field produced by a variable voltage source having a first electrode connected to said fiber feed means to produce an electric charge on said fibers while passing through said feed means whereby said fibers are vibrated by said variable electrical field such that the fibers do not adhere to said feed means and upon said fibers being discharged from said feed means said electrical field between said feed means and said axial inlet exerts a pulling force on said fibers simultaneously straightening and aligning the fibers with the axial inlet and causing said fibers to move across the space between said feed means and said axial inlet where the straightened aligned fibers are twisted into thread by said twisting means.
Claim 12
Dependent Claim
171 words
Apparatus for spinning textile fibers, comprising: a. fiber feed means having a distribution end; b. fiber twisting means spaced from said feed means and having an axial inlet generally directed toward said discharge end of said feed means for receiving fibers discharged by said feed means; and c. a variable electrical field produced by a variable voltage source having a first electrode connected to said fiber feed means to produce an electric charge on said fibers while passing through said feed means whereby said fibers are vibrated by said variable electrical field such that the fibers do not adhere to said feed means and upon said fibers being discharged from said feed means said electrical field between said feed means and said axial inlet exerts a pulling force on said fibers simultaneously straightening and aligning the fibers with the axial inlet and causing said fibers to move across the space between said feed means and said axial inlet where the straightened aligned fibers are twisted into thread by said twisting means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |