Patent US3775244A successfully refreshed from Google Patents.
US3775244A
Expired / Lapsed
US
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Apparatus for manufacturing nonwoven textiles
Assignee: Rhodiaceta SA
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Filing: 1971-10-14
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Granted: 1973-11-27
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Expires: 1991-10-14
Abstract
Abstract An apparatus for manufacturing nonwoven textile webs from an aqueous dispersion of fibers including an endless flexible porous belt, a headbox positioned to deliver the aqueous dispersion to the belt, and at least one suction device having a removable and perforated mask, the perforations of the mask being aligned and arranged parallel to the direction of travel of the porous belt. The suction device is located on the opposite side of the belt from the headbox and is conterminous with the headbox.
Inventors
- 👤 J Hubschmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:26
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/48; D21F1/52
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
110 words
Apparatus for forming sheet material from an aqueous dispersion of fibers utilizing papermaking methods wherein the apparatus includes at least one head box, at least one suction device which is conterminous with said head box, and an endless, flexible, porous, filtering belt traveling between said head box and said suction device and forming a portion of the bottom of the head box; said suction device comprising a suction box, means for reducing the pressure within said suction box, a perforated mask and means for removably attaching said mask to said suction box; and said mask defining rows of apertures arranged parallel to the direction of travel of said filtering belt.
Claim 2
Dependent Claim
110 words
Apparatus for forming sheet material from an aqueous dispersion of fibers utilizing papermaking methods wherein the apparatus includes at least one head box, at least one suction device which is conterminous with said head box, and an endless, flexible, porous, filtering belt traveling between said head box and said suction device and forming a portion of the bottom of the head box; said suction device comprising a suction box, means for reducing the pressure within said suction box, a perforated mask and means for removably attaching said mask to said suction box; and said mask defining rows of apertures arranged parallel to the direction of travel of said filtering belt.
Claim 3
Dependent Claim
27 words
The apparatus of claim 1 including means to move said suction device in a direction transverse with respect to the direction of travel of the filtering belt.
Claim 4
Dependent Claim
13 words
The apparatus of claim 2 wherein said apertures in the mask are circular.
Claim 5
Dependent Claim
13 words
The apparatus of claim 3 wherein said rows of apertures are evenly spaced.
Claim 6
Dependent Claim
13 words
The apparatus of claim 3 wherein said rows of apertures are irregularly spaced.
Claim 7
Dependent Claim
10 words
The apparatus of claim 2 wherein said apertures are square.
Claim 8
Dependent Claim
11 words
The apparatus of claim 1 wherein said suction device is stationary.
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |