Patent US3394435A successfully refreshed from Google Patents.
US3394435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making a nonwoven web
Assignee: EIDP Inc
•
Filing: 1966-05-31
•
Granted: 1968-07-30
•
Expires: 1986-05-31
Abstract
No abstract record available.
Inventors
- 👤 Terence E C Knee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:52
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/08; D04H3/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
APPARATUS COMPRISING A MOVABLE FORAMINOUS WEBLAYDOWN RECEIVER ON WHICH TO FORM A NONWOVEN WEB, A PLURALITY OF MEANS FOR DISCHARGING A STREAM OF AIR CONTAINING A PLURALITY OF FILAMENTS ONTO ONE FACE OF SAID RECEIVER, A PRIMARY SUCTION-CHAMBER LOCATED AT THE OPPOSITE FACE OF SAID RECEIVER AND OPPOSITE THE SAID DISCHARGING MEANS, FOR WITHDRAWING AIR THAT IS DIRECTED AT THE WEB-LAYDOWN RECEIVER BY SAID DISCHARGE MEANS AND THAT PASSES THROUGH SAID WEB-LAYDOWN RECEIVER, AND A SECONDARY SUCTION-BOX LOCATED BELOW THE WEB-LAYDOWN RECEIVER AND CONTIGUOUS WITH THE DOWNSTREAM SIDE OF THE PRIMARY SUCTION-CHAMBER, THE SECONDARY SUCTION-CHAMBER HAVING MEANS FOR SUCCESSIVELY INCREASING RESISTANCE TO FLOW FROM THE SIDE OF THE SECONDARY SUCTION-CHAMBER CONTIGUOUS TO THE PRIMARY SUCTION-CHAMBER TO THE DOWNSTREAM SIDE WHERE THE WEB LEAVES THE SUCTION ZONE OF THE SECONDARY SUCTION CHAMBER.
Claim 2
Dependent Claim
131 words
APPARATUS COMPRISING A MOVABLE FORAMINOUS WEBLAYDOWN RECEIVER ON WHICH TO FORM A NONWOVEN WEB, A PLURALITY OF MEANS FOR DISCHARGING A STREAM OF AIR CONTAINING A PLURALITY OF FILAMENTS ONTO ONE FACE OF SAID RECEIVER, A PRIMARY SUCTION-CHAMBER LOCATED AT THE OPPOSITE FACE OF SAID RECEIVER AND OPPOSITE THE SAID DISCHARGING MEANS, FOR WITHDRAWING AIR THAT IS DIRECTED AT THE WEB-LAYDOWN RECEIVER BY SAID DISCHARGE MEANS AND THAT PASSES THROUGH SAID WEB-LAYDOWN RECEIVER, AND A SECONDARY SUCTION-BOX LOCATED BELOW THE WEB-LAYDOWN RECEIVER AND CONTIGUOUS WITH THE DOWNSTREAM SIDE OF THE PRIMARY SUCTION-CHAMBER, THE SECONDARY SUCTION-CHAMBER HAVING MEANS FOR SUCCESSIVELY INCREASING RESISTANCE TO FLOW FROM THE SIDE OF THE SECONDARY SUCTION-CHAMBER CONTIGUOUS TO THE PRIMARY SUCTION-CHAMBER TO THE DOWNSTREAM SIDE WHERE THE WEB LEAVES THE SUCTION ZONE OF THE SECONDARY SUCTION CHAMBER.
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) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |