US4797980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste separator for a card
Assignee: Truetzschler GmbH and Co KG
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Filing: 1987-06-19
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Granted: 1989-01-17
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Expires: 2007-06-19
Abstract
Abstract A card includes a main carding cylinder having a direction of rotation, a doffer cooperating with the main carding cylinder and a waste separator situated above the doffer and adjacent the main carding cylinder. The waste separator includes a knife blade situated close to the main carding cylinder and being oriented in a direction opposite the direction of rotation, a plate situated at a small radial distance from the main carding cylinder and having an edge defining a gap with the knife blade and a casing defining a suction chamber shrouding the gap. The casing and the knife blade are formed of a single-piece component.
Inventors
- 👤 Peter Jagst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:49
CPC Classifications
D; D01; D01G; D01G15/00; D01G15/76; D01G15/80; D01G15/805
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
109 words
In a card including a main carding cylinder having a direction of rotation, a doffer cooperating with the main carding cylinder and a waste separator situated above the doffer and adjacent the main carding cylinder; the waste separator including a knife blade situated close to the main carding cylinder and being oriented in a direction opposite said direction of rotation, a plate situated at a small radial distance from the main carding cylinder and having an edge defining a gap with the knife blade and a casing defining a suction chamber shrouding said gap; the improvement wherein said casing and said knife blade are formed of a single-piece component.
Claim 2
Dependent Claim
109 words
In a card including a main carding cylinder having a direction of rotation, a doffer cooperating with the main carding cylinder and a waste separator situated above the doffer and adjacent the main carding cylinder; the waste separator including a knife blade situated close to the main carding cylinder and being oriented in a direction opposite said direction of rotation, a plate situated at a small radial distance from the main carding cylinder and having an edge defining a gap with the knife blade and a casing defining a suction chamber shrouding said gap; the improvement wherein said casing and said knife blade are formed of a single-piece component.
Claim 3
Dependent Claim
24 words
A card as defined in claim 1, wherein said casing is a bent sheet metal member having a longitudinal edge constituting said knife blade.
Claim 4
Dependent Claim
47 words
A card as defined in claim 2, wherein said casing has a further longitudinal edge spaced from said knife blade and defining a longitudinal air inlet clearance with said plate; said air inlet clearance being in communication with said suction chamber and being spaced from said gap.
Claim 5
Dependent Claim
35 words
A card as defined in claim 3, wherein said clearance has a width; further comprising a regulating plate slidably mounted on said casing at said further longitudinal edge for varying the width of said clearance.
Claim 6
Dependent Claim
28 words
A card as defined in claim 1, wherein said casing has two walls joining one another at 90°; said knife blade being formed at one of said walls.
Claim 7
Dependent Claim
15 words
A card as defined in claim 1, wherein said casing has a rectangular cross-sectional outline.
Claim 8
Dependent Claim
12 words
A card as defined in claim 1, wherein said casing is tubular.
Claim 9
Dependent Claim
22 words
A card as defined in claim 1, further comprising means for adjusting the distance of said casing from said main carding cylinder.
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) | 1992-01-17 | 1992-07-18 | 1993-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-17 | 1996-07-18 | 1997-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-17 | 2000-07-18 | 2001-01-17 | $7700.00 | Window Closed / Lapsed |