US3752613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing spray spun nonwoven sheets
Assignee: Veolia WTS Solutions USA Inc
•
Filing: 1972-05-24
•
Granted: 1973-08-14
•
Expires: 1992-05-24
Abstract
Abstract Spray-spun nonwoven sheets having improved physical properties are produced by spray spinning a fiber-forming polymer tangentially onto the surface of a sheet collection device. The randomness of the spray-spinning process provides a uniform sheet having both long and short filaments.
Inventors
- 👤 C Vogt
- 👤 J Polise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:52
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/08; D04H3/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
The apparatus of claim 1 wherein the lowest point of the arcuate surface with respect to the collection device is at a distance from about 1 to 18 inches from the front tip of said arcuate surface nearest the collection device, said arcuate surface starting at a point, which is from about 20 to 90 percent of the distance between the front edge of the arcuate surface and the lowest point of said arcuate surface.
Claim 2
Dependent Claim
26 words
The apparatus of claim 1 wherein the angle said arcuate surface slopes down initially with respect to said collection device ranges from about 5* to 30*.
References Cited (Backward Citations)
US2753598A
Cited
US3565729A
Cited
US3634573A
Cited
US3704192A
Cited
DE1809761A1
Cited
US3535187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |