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Patent US4157601A successfully refreshed from Google Patents.
US4157601A
Expired / Lapsed
US
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Front screen for carding machines
Assignee: Individual
•
Filing: 1978-02-24
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Granted: 1979-06-12
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Expires: 1998-02-24
Abstract
Abstract A front screen is illustrated having a nose portion extending from beneath the cylinder between the cylinder and the doffer wherein orifice means are provided for directing air under pressure forwardly therefrom for avoiding collection of fibers on the side and corner areas of the nose of the screen.
Inventors
- 👤 Olin S. Elliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:25
CPC Classifications
D; D01; D01G; D01G15/00; D01G15/02; D01G15/12; D01G15/34
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
103 words
A front screen for a carding machine having a cylinder and doffer carried between side frame members comprising: a nose portion extending forwardly from beneath the cylinder between the cylinder and the doffer and within the side frame members; orifice means in the marginal portions of the nose portion extending adjacent a forward end of the nose portion; and means connecting a source of compressed air to said orifice means directing air forwardly therefrom for avoiding collection of fibers on the nose of the screen adjacent marginal portions of a web but at sufficiently low pressure as to avoid damage to the web.
Claim 2
Dependent Claim
103 words
A front screen for a carding machine having a cylinder and doffer carried between side frame members comprising: a nose portion extending forwardly from beneath the cylinder between the cylinder and the doffer and within the side frame members; orifice means in the marginal portions of the nose portion extending adjacent a forward end of the nose portion; and means connecting a source of compressed air to said orifice means directing air forwardly therefrom for avoiding collection of fibers on the nose of the screen adjacent marginal portions of a web but at sufficiently low pressure as to avoid damage to the web.
Claim 3
Dependent Claim
17 words
The structure set forth in claim 1, wherein said orifice means includes a plurality of spaced openings.
Claim 4
Dependent Claim
25 words
The structure set forth in claim 1, including orifice means connected to said source of compressed air adjacent each side end of the nose portion.
Claim 5
Dependent Claim
29 words
The structure set forth in claim 1, including a wall substantially enclosing at least a part of said nose portion except for said orifice means forming an air plenum.
Claim 6
Dependent Claim
33 words
The structure set forth in claim 4, wherein said means connecting a source of compressed air to said orifice means includes an air line connected centrally of said plenum connected to said source.
References Cited (Backward Citations)
SU355258A1
Cited
US2964804A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-06-11 | 1982-12-11 | 1983-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-11 | 1986-12-11 | 1987-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-11 | 1990-12-11 | 1991-06-12 | $7700.00 | Window Closed / Lapsed |