US4400852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dirt separator with a web-carding plate
Assignee: John D Hollingsworth on Wheels Inc
•
Filing: 1981-09-03
•
Granted: 1983-08-30
•
Expires: 2001-09-03
Abstract
Abstract The dirt separator for carding machines is located upstream of the doffer cylinder and comprises a knife blade (16) as well as a foot portion or base plate that is provided with a toothed wire clothing (19), which is arranged with a clearance of about 0.25 mm from the main drum of the carding machine. The knife blade (16) is preceeded by a gap (27), which is in fluid flow communication with a suction duct (24).
Inventors
- 👤 Walter Loffler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:34
CPC Classifications
D; D01; D01G; D01G15/00; D01G15/02; D01G15/12; D01G15/34; D01G15/76; D01G15/80; D01G15/805
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
135 words
An improved dirt separator, used with cards and combs of the type including a doffing cylinder and a main cylinder rotatable in a first rotational direction, the dirt separator of the type including a plate closely spaced apart a short radial distance from the main cylinder, a knife blade located to point against the direction of rotation of the main cylinder, at an adjustable distance from the latter, and at a peripheral distance behind the plate in the first rotational direction, a base face adjoining the knife blade in the first rotational direction, and an extraction chamber covering a gap between the plate and the knife blade, the improvement comprising: wherein the base face is covered with a sawtooth wire clothing; and means for mounting the dirt separator immediately in front of the doffing cylinder.
Claim 2
Dependent Claim
135 words
An improved dirt separator, used with cards and combs of the type including a doffing cylinder and a main cylinder rotatable in a first rotational direction, the dirt separator of the type including a plate closely spaced apart a short radial distance from the main cylinder, a knife blade located to point against the direction of rotation of the main cylinder, at an adjustable distance from the latter, and at a peripheral distance behind the plate in the first rotational direction, a base face adjoining the knife blade in the first rotational direction, and an extraction chamber covering a gap between the plate and the knife blade, the improvement comprising: wherein the base face is covered with a sawtooth wire clothing; and means for mounting the dirt separator immediately in front of the doffing cylinder.
Claim 3
Dependent Claim
22 words
Dirt separator according to claim 1, further comprising means for adjusting the distance between the sawtooth wire clothing and the main cylinder.
Claim 4
Dependent Claim
32 words
Dirt separator according to claims 1 or 2, characterised in that the sawtooth wire clothing consists of lengths of sawtooth wire lying parallel to one another and having a symmetrical tooth shape.
Claim 5
Dependent Claim
25 words
Dirt separator according to claim 1 characterised in that the distance of the sawtooth wire clothing (19) from the main cylinder is approximately 0.25 mm.
Claim 6
Dependent Claim
18 words
Dirt separator according to claim 1 characterised in that the sawtooth wire clothing constitutes an exchangeable constructional unit.
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) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |