Patent US3733945A successfully refreshed from Google Patents.
US3733945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for cutting and removing elongated material
Assignee: Celanese Corp
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Filing: 1971-06-03
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Granted: 1973-05-22
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Expires: 1991-06-03
Abstract
Abstract A method and apparatus is disclosed and claimed for cutting and removing elongated material by means of a plurality of knife edges and an overhead air jet. The cutting is achieved by applying a pressure to the inner layer of continuous filament forcing it against the knife edges and thereby cutting the filament wherein the air jet impinges downwardly upon the cut filament and causes it to be removed.
Inventors
- 👤 C Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:51
CPC Classifications
D; D01; D01G; D01G1/00; D01G1/02; D01G1/04; Y; Y10; Y10S; Y10S83/00; Y10S83/913; Y10T; Y10T83/00; Y10T83/04; Y10T83/0448; Y10T83/0453; Y10T83/202; Y10T83/2066; Y10T83/2068
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
152 words
In the method for cutting fibrous elongated material into a number of shorter lengths comprising continuously feeding the elongated material to a plurality of knife edges and extending the inner layer of the material across and in contact with each two adjacent knife edges of the plurality of knife edges so that the inner layer is in touch, lightly tensioned contact with the knife edges, applying a pressure against the material that is outwardly of the inner layer thereby forcinG said inner layer against said knife edges and while retaining the inner layer in extended manner across said adjacent knife edges cutting said inner layer into said number of shorter lengths, the improvement comprising removing the shorter lengths away from said knife edges by directing at least one stream of air downwardly upon the proximity of the doffing point of the cut fiber the cut fiber being a material of uniform openness.
Claim 2
Dependent Claim
152 words
In the method for cutting fibrous elongated material into a number of shorter lengths comprising continuously feeding the elongated material to a plurality of knife edges and extending the inner layer of the material across and in contact with each two adjacent knife edges of the plurality of knife edges so that the inner layer is in touch, lightly tensioned contact with the knife edges, applying a pressure against the material that is outwardly of the inner layer thereby forcinG said inner layer against said knife edges and while retaining the inner layer in extended manner across said adjacent knife edges cutting said inner layer into said number of shorter lengths, the improvement comprising removing the shorter lengths away from said knife edges by directing at least one stream of air downwardly upon the proximity of the doffing point of the cut fiber the cut fiber being a material of uniform openness.
Claim 3
Dependent Claim
28 words
The method of claim 1 wherein from about 5 to about 22 standard cubic feet per minute of air is directed downwardly by means of an air jet.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein said elongated material is polyester tow.
Claim 5
Dependent Claim
120 words
In an apparatus for cutting material into predetermined lengths comprising a cutting assembly including a plurality of knife edges secured to a reel having an upper and a lower mounting member and having means adapted to receive successive wrappings of material to be cut in contact with said plurality of knife edges and means for forcing said material between adjacent knife edges thereby severing said material into lengths of controlled dimensions the improvement comprising means for removing the severed material, said means comprising at least one air jet causing air to flow downwardly through a plurality of apertures in said upper mounting member and impinging upon the severed material in the proximity of the doffing point of said severed material.
Claim 6
Dependent Claim
120 words
In an apparatus for cutting material into predetermined lengths comprising a cutting assembly including a plurality of knife edges secured to a reel having an upper and a lower mounting member and having means adapted to receive successive wrappings of material to be cut in contact with said plurality of knife edges and means for forcing said material between adjacent knife edges thereby severing said material into lengths of controlled dimensions the improvement comprising means for removing the severed material, said means comprising at least one air jet causing air to flow downwardly through a plurality of apertures in said upper mounting member and impinging upon the severed material in the proximity of the doffing point of said severed material.
Claim 7
Dependent Claim
11 words
The apparatus of claim 4 wherein said material is filamentary material.
Claim 8
Dependent Claim
44 words
The apparatus of claim 5 wherein said plurality of apertures are of the same number as said plurality of knife edges and are located individually centrally between each of said knife edges and above the proximity of the doffing point of said severed material.
Claim 9
Dependent Claim
39 words
The apparatus of claim 6 wherein at least one air jet is located in such a manner so as to cause air to impinge downwardly upon the doffing point nearest said means for forcing material between adjacent knife edges.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |