US4176988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for separating opened fibre flocks from a transporting air stream
Assignee: Maschinenfabrik Rieter AG
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Filing: 1978-07-10
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Granted: 1979-12-04
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Expires: 1998-07-10
Abstract
Abstract An apparatus for separating opened fibre flocks from a transporting air stream composed of one chute or of a plurality of consecutive chutes connected to a transporting duct. At least one air permeable separating wall guides transporting air into an exhaust duct located behind the separating wall. A driven take-off device which forms a fibre layer is arranged at the lower chute end. The take-off device comprises a take-off roll which is arranged facing the air permeable separating wall and leaving free a small cross-section, as the deposited fibres pass through. The exhaust duct extends at least into the zone of the smallest clearance between the take-off roll and the wall, and, the take-off roll is sealed with respect to the other wall.
Inventors
- 👤 Werner Lattmann
- 👤 Paul Staheli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:40
CPC Classifications
D; D01; D01G; D01G23/00; D01G23/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
156 words
An apparatus for separating opened fibre flocks from a transporting air-stream, moving through a transporting duct, comprising: at least one chute operatively connected with the transporting duct; an exhaust duct cooperating with said chute; said chute being provided with at least one air-permeable separating wall for guiding transporting air into said exhaust duct; said chute having a lower end region; a driven take-off device arranged at said lower end region of said chute comprising a take-off roll arranged facing said air-permeable separating wall and leaving free a small cross-section through which pass the deposited fibres; said take-off device forming a fibre layer by compressing said deposited fibres between said take-off roll and said air-permeable separating wall; said exhaust duct extending at least into a zone of smallest clearance between the take-off roll and said air-permeable separating wall; said chute containing a further wall; and means for sealing the take-off roll with respect to said further wall.
Claim 2
Independent Claim
156 words
An apparatus for separating opened fibre flocks from a transporting air-stream, moving through a transporting duct, comprising: at least one chute operatively connected with the transporting duct; an exhaust duct cooperating with said chute; said chute being provided with at least one air-permeable separating wall for guiding transporting air into said exhaust duct; said chute having a lower end region; a driven take-off device arranged at said lower end region of said chute comprising a take-off roll arranged facing said air-permeable separating wall and leaving free a small cross-section through which pass the deposited fibres; said take-off device forming a fibre layer by compressing said deposited fibres between said take-off roll and said air-permeable separating wall; said exhaust duct extending at least into a zone of smallest clearance between the take-off roll and said air-permeable separating wall; said chute containing a further wall; and means for sealing the take-off roll with respect to said further wall.
Claim 3
Dependent Claim
50 words
The apparatus as defined in claim 1, wherein: said means for sealing said take-off roll with respect to said further wall comprises a movable sealing element; and means for mounting said movable sealing element in a position such that the pressure conditions prevailing in said chute augment the sealing action.
Claim 4
Dependent Claim
51 words
The apparatus as defined in claim 1, wherein: said further wall is positioned opposite to said air-permeable separating wall; and said means for sealing the take-off roll with respect to said further wall comprises a sealing element located between said further wall opposite said air-permeable separating wall and the take-off roll.
Claim 5
Dependent Claim
34 words
The apparatus as defined in claim 3, wherein: said sealing element comprises a sheet-metal plate; and means for pivotably mounting said sheet-metal plate at said further wall and for contact with said take-off roll.
Claim 6
Dependent Claim
46 words
The apparatus as defined in claim 3, wherein: said sealing element comprises a substantially cylindrical roll; an extension plate provided for said further wall of said chute; said cylindrical roll being arranged between said extension plate and said take-off roll and being pressed towards said chute.
Claim 7
Dependent Claim
33 words
The apparatus as defined in claim 3, further including: means for movably mounting said take-off roll; and means for mounting said sealing element for movement together with the movement of said take-off roll.
References Cited (Backward Citations)
US3400518A
Cited
US3487509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-03 | 1983-06-04 | 1983-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-03 | 1987-06-04 | 1987-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-03 | 1991-06-04 | 1991-12-04 | $7700.00 | Window Closed / Lapsed |