US3679111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the production of fibrous materials
Assignee: Monsanto Chemicals Ltd
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Filing: 1970-06-09
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Granted: 1972-07-25
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Expires: 1990-06-09
Abstract
Abstract Orientated and foamed thermoplastic material is fibrillated by passing the material through a nip comprised of a pair of rotatable rolls each having a series of radially extending ribs with the ribs of one roll intermeshing with the ribs of another roll, the rolls being movable with respect to each other so that the degree of interpenetration of the ribs may be controlled.
Inventors
- 👤 Peter Volans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:59
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/42; D01D5/423; Y; Y10; Y10S; Y10S264/00; Y10S264/08; Y10T; Y10T225/00; Y10T225/10; Y10T225/14; Y10T225/30; Y10T225/329
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
96 words
An apparatus which comprises a pair of rotatable rolls being spaced apart and having parallel axes, ribs having roughened exterior surfaces and mounted on said rolls to extend radially outwardly, said ribs being spaced apart along the length of said rolls, with the ribs of one roll intermeshing and remaining out of contact with the ribs of another roll, and means for adjusting the relative position of said rolls and the degree of interpenetration of said ribs so as to form a controlled nip, the nip being adaptable to receive and fibrillate an orientated thermoplastic material.
Claim 2
Independent Claim
96 words
An apparatus which comprises a pair of rotatable rolls being spaced apart and having parallel axes, ribs having roughened exterior surfaces and mounted on said rolls to extend radially outwardly, said ribs being spaced apart along the length of said rolls, with the ribs of one roll intermeshing and remaining out of contact with the ribs of another roll, and means for adjusting the relative position of said rolls and the degree of interpenetration of said ribs so as to form a controlled nip, the nip being adaptable to receive and fibrillate an orientated thermoplastic material.
Claim 3
Dependent Claim
13 words
The apparatus of claim 1 wherein said rolls are rotatable in opposite directions.
Claim 4
Dependent Claim
26 words
The apparatus of claim 2 wherein means is provided for applying a lateral stretch to said material prior to said material being presented to said nip.
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |