US3876500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fourdrinier paper-making machine with water-control base wire positioned beneath forming wire
Assignee: JM Voith GmbH
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Filing: 1973-04-19
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Granted: 1975-04-08
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Expires: 1993-04-19
Abstract
Abstract A Fourdrinier wire travels in a predetermined path, and a stock inlet discharges aqueous paper stock onto this wire. A travelling base wire has a first stringer arranged to travel underneath and in contact with the Fourdrinier wire, and a second stringer arranged to travel out of contact therewith. The base wire is so constituted or of such material as to attract water from the Fourdrinier wire by capillary action, such as a felt or a synthetic plastic wire of close-meshed construction. An adjusting arrangement including a spray tube and suction box acts upon the second stringer to permit adjustment of the content of water in the base wire.
Inventors
- 👤 Elemer Csordas
- 👤 Dieter Egelhof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:58
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/48; D21F1/52; D21F1/523; D21F1/526; D21F9/00; D21F9/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
156 words
In a Fourdrinier paper-making machine, a combination comprising a Fourdrinier wire travelling in a path; a stock inlet for discharging aqueous paper stock onto said Fourdrinier wire; a travelling base wire means having a first stringer arranged to travel in contact with said Fourdrinier wire along a portion of said path which has an upstream and downstream end, and a second stringer arranged to travel out of contact with said Fourdrinier wire, said base wire means being operative for withdrawing water from said Fourdrinier wire by capillary action and for storing the thus withdrawn water within itself; deflecting means for deflecting said first stringer intermediate said ends first out of and thereupon back into engagement with said Fourdrinier wire; means for removing water from said first stringer while the same is out of engagement with said Fourdrinier wire; and adjusting means acting upon said second stringer for adjusting the content of water in said base wire
Claim 2
Dependent Claim
156 words
In a Fourdrinier paper-making machine, a combination comprising a Fourdrinier wire travelling in a path; a stock inlet for discharging aqueous paper stock onto said Fourdrinier wire; a travelling base wire means having a first stringer arranged to travel in contact with said Fourdrinier wire along a portion of said path which has an upstream and downstream end, and a second stringer arranged to travel out of contact with said Fourdrinier wire, said base wire means being operative for withdrawing water from said Fourdrinier wire by capillary action and for storing the thus withdrawn water within itself; deflecting means for deflecting said first stringer intermediate said ends first out of and thereupon back into engagement with said Fourdrinier wire; means for removing water from said first stringer while the same is out of engagement with said Fourdrinier wire; and adjusting means acting upon said second stringer for adjusting the content of water in said base wire
Claim 3
Dependent Claim
49 words
A combination as defined in claim 1; further comprising a breast roller about which said Fourdrinier wire and said first stringer of said base wire means are both trained; and wherein said stock inlet is arranged to discharge said stock onto said Fourdrinier wire in the region of said
Claim 4
Dependent Claim
14 words
A combination as defined in claim 1, wherein said base wire means is a
Claim 5
Dependent Claim
14 words
A combination as defined in claim 1, wherein said base wire means is a
Claim 6
Dependent Claim
33 words
A combination as defined in claim 1; and further comprising supporting means arranged adjacent said portion of said path for supporting said wires, and having means forming at least one suction chamber for
Claim 7
Dependent Claim
36 words
A combination as defined in claim 1; and further comprising means arranged at a downstream end of said portion of said path, in engagement with said base wire means for deflecting the same away from said
Claim 8
Dependent Claim
38 words
A combination as defined in claim 1; and further comprising a deflecting portion arranged at said downstream end of said portion of said path, and having a guide surface which engages said base wire means and is oriented
Claim 9
Dependent Claim
22 words
A combination as defined in claim 7; and further comprising support means arranged adjacent said portion of said path for supporting said
Claim 10
Dependent Claim
12 words
A combination as defined in claim 8, wherein said guide surface is
Claim 11
Dependent Claim
90 words
A combination as defined in claim 1; further comprising a breast roller around which said Fourdrinier wire and said base wire means are both trained, and wherein said stock inlet discharges onto said Fourdrinier wire in the region of said breast roller; and at least one additional breast roller, at least one additional Fourdrinier wire, at least one additional base wire means trained with said additional Fourdrinier wire about said additional breast roller, and additional adjusting means acting upon the second stringer of said additional base wire means for adjusting
Claim 12
Dependent Claim
54 words
A combination as defined in claim 10; and means maintaining each first stringer of the respective base wire is in contact with the associated Fourdrinier wire from the respective breast roller to a location downstream of the latter beyond which the fibers of said stock no longer appreciably change their relative positions during de-watering.
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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |