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US3748693A
Expired / Lapsed
US
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Apparatus for making nonwoven fibrous webs
Assignee: Georgia-Pacific LLC
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Filing: 1971-03-26
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Granted: 1973-07-31
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Expires: 1991-03-26
Abstract
Abstract An apparatus wherein a plurality of fibers are transported to and deposited on a foraminous conveyor by a flow of gas to form a nonwoven fibrous web. The passage of the flow through the conveyor is regulated by two independently operable, superposed means for selectively restricting such passage to control the deposition of the fibers on the conveyor and thereby control the thickness of the web.
Inventors
- 👤 P Jespersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:01
CPC Classifications
D; D01; D01G; D01G25/00; D04; D04H; D04H1/00; D04H1/70; D04H1/72; D04H1/732; D21; D21H; D21H11/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
An apparatus as recited in claim 1, wherein each of said vanes is mounted for pivotal movement about an axis extending transversely of said conveyor portion, whereby the fiber deposition pattern may be further regulated by differentially adjusting the vanes.
Claim 2
Dependent Claim
15 words
An apparatus as recited in claim 1, wherein said conveyor comprises a wire mesh belt.
References Cited (Backward Citations)
US2317895A
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US2581069A
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US2648876A
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US2890497A
Cited
FR1396985A
Cited
US3501813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |