Patent US4759078A successfully refreshed from Google Patents.
US3763641A
Expired / Lapsed
US
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Method and apparatus for removing impurities released from staple fibers
Assignee: Vyzkumny Ustav Bavlnarsky AS
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Filing: 1972-03-21
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Granted: 1973-10-09
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Expires: 1992-03-21
Abstract
Abstract Method of and apparatus for removing impurities released from staple fibers on a separating device preceding an underpressure spinning chamber and delivering them into a collecting area. The impurities are sucked away from the collecting area by underpressure produced by the pressure of air drawn off from the spinning chamber, a part of the air that is being drawn off from the spinning chamber being fed to the collecting area and dragging the impurities into an underpressure outlet tube.
Inventors
- 👤 C Doudlebsky
- 👤 F Jaros
- 👤 F Ferkl
- 👤 A Cap
- 👤 M Chrtek
- 👤 C Trebova
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:19
CPC Classifications
D; D01; D01H; D01H4/00; D01H4/30; D01H4/36
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
52 words
In a method of removing impurities released from staple fibers on a separating device preceding an underpressure spinning chamber and deliVering them into a collecting area, the improvement which comprises sucking the impurities away from the collecting area by underpressure produced by the pressure of air drawn off from the spinning chamber.
Claim 2
Dependent Claim
52 words
In a method of removing impurities released from staple fibers on a separating device preceding an underpressure spinning chamber and deliVering them into a collecting area, the improvement which comprises sucking the impurities away from the collecting area by underpressure produced by the pressure of air drawn off from the spinning chamber.
Claim 3
Dependent Claim
38 words
A method according to claim 1, wherein a part of the air that is being drawn off from the spinning chamber is fed to the collecting area so as to drag the impurities into an underpressure outlet tube.
Claim 4
Dependent Claim
11 words
A method according to claim 1, comprising intermittently interrupting the sucking.
Claim 5
Dependent Claim
91 words
In an apparatus for removing impurities from staple fibers on a separating device preceding an underpressure spinning chamber and delivering them into a collecting area, the improvement which comprises means for sucking the impurities away from the collecting area by underpressure produced by the pressure of air drawn off from the spinning chamber, said last-named means comprising a combing out roller in the separating device, and a cleaning slot open to the collecting area, said slot being connected to the area in which the combing-out roller of the separating device rotates.
Claim 6
Dependent Claim
91 words
In an apparatus for removing impurities from staple fibers on a separating device preceding an underpressure spinning chamber and delivering them into a collecting area, the improvement which comprises means for sucking the impurities away from the collecting area by underpressure produced by the pressure of air drawn off from the spinning chamber, said last-named means comprising a combing out roller in the separating device, and a cleaning slot open to the collecting area, said slot being connected to the area in which the combing-out roller of the separating device rotates.
Claim 7
Dependent Claim
43 words
Apparatus according to claim 4, comprising means connecting the collecting area to an underpressure exhaust tube leading to a source of underpressure, the working medium of which is air that is exhausted from the space around the spinning chamber through an exhaust channel.
Claim 8
Dependent Claim
13 words
Apparatus according to claim 5, wherein the source of underpressure is an injector.
Claim 9
Dependent Claim
56 words
Apparatus according to claim 4, wherein the collecting area is formed by a cylindrical body within a casing, the body being provided with a longitudinal hole for the inlet of impurities, one front face of the cylindrical body being covered and the other, the outlet of the collecting area, being connected to the underpressure exhaust tube.
Claim 10
Dependent Claim
44 words
Apparatus according to claim 7, wherein a part of the cylindrical body accommodated in the casing is provided with blowing channels connecting the collecting area with the area of the case which is connected with the exhaust channel by means of the pressure channel.
Claim 11
Dependent Claim
16 words
Apparatus according to claim 8, wherein the blowing channels are arranged tangentially in the cylindrical body.
Claim 12
Dependent Claim
18 words
Apparatus according to claim 9, wherein the blowing channels are oriented towards the outlet of the collecting area.
Claim 13
Dependent Claim
24 words
Apparatus according to claim 7, wherein the underpressure exhaust tube is provided with a funnel in the place where it joins the collecting area.
Claim 14
Dependent Claim
38 words
Apparatus according to claim 8, wherein the inlet of the pressure channel is arranged in the exhaust channel and widens in a direction opposite the direction of flow of the air stream drawn away through the exhaust channel.
Claim 15
Dependent Claim
14 words
Apparatus according to claim 4, comprising an interrupter interposed in the pressure exhaust tube.
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |