US3839148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shower structure for paper machine
Assignee: Beloit Corp
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Filing: 1972-09-22
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Granted: 1974-10-01
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Expires: 1992-09-22
Abstract
Abstract A paper making machine structure including a mechanism for directing a blade-like jet of fluid against a moving surface such as a traveling fourdrinier wire where in one form the blade-like jet extends parallel to the forming surface to form a deckle edge and where in another form the jet extends across within the wire on the return side to provide a web knockoff. The jet mechanism includes an elongate hollow shell formed in a general U-shape to provide a continuous fluid chamber with a pair of lips integral with the shell with their distal edges separated in a jet gap and a gap control device pressing against the outer surface of the shell and applying a force thereto to control the width of the jet gap.
Inventors
- 👤 R Beck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:37
CPC Classifications
D; D21; D21G; D21G9/00; D21F; D21F1/00; D21F1/54
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
157 words
A mechanism for directing a fluid jet against a traveling member in a paper machine comprising: an elongate hollow shell formed in a general U-shape to provide a continuous fluid chamber, the shell formed of one piece and having opposite sides terminating in a pair of lips integral therewith and of the same piece with their distal edges separated in a jet gap to determine the size of a fluid jet issuing therefrom; said shell having walls for closing the ends of said shell so that a pressurized fluid directed into the shell will be projected through said jet gap; and a gap control means including a pair of jaws forcibly engaging the outer surface of the opposite sides of the shell for controlling the space in between the lips with the shell having a normal spring bias tending to separate the lips so that the jet gap changes with change in force applied by said jaws.
Claim 2
Dependent Claim
157 words
A mechanism for directing a fluid jet against a traveling member in a paper machine comprising: an elongate hollow shell formed in a general U-shape to provide a continuous fluid chamber, the shell formed of one piece and having opposite sides terminating in a pair of lips integral therewith and of the same piece with their distal edges separated in a jet gap to determine the size of a fluid jet issuing therefrom; said shell having walls for closing the ends of said shell so that a pressurized fluid directed into the shell will be projected through said jet gap; and a gap control means including a pair of jaws forcibly engaging the outer surface of the opposite sides of the shell for controlling the space in between the lips with the shell having a normal spring bias tending to separate the lips so that the jet gap changes with change in force applied by said jaws.
Claim 3
Dependent Claim
48 words
A mechanism for directing a fluid jet against a traveling member in a paper machine constructed in accordance with claim 1: wherein said shell is formed of a metal having sufficient flexibility so that the width of said jet gap will change responsive to said gap control means.
Claim 4
Dependent Claim
32 words
A mechanism for directing a fluid jet against a traveling member in a paper machine constructed in accordance with claim 1: wherein said hollow shell is formed of a shaped plastic material.
Claim 5
Dependent Claim
51 words
A mechanism for directing a fluid jet against a traveling member in a paper machine constructed in accordance with claim 1: including means pivotally connecting said jaws; and a threaded member coNnected to said jaws for applying a force to pivot the jaws and change the width of said jet gap.
Claim 6
Dependent Claim
62 words
A mechanism for directing a fluid jet against a traveling member in a paper machine constructed in accordance with claim 1: wherein said gap control means includes a holder with a bifurcated end to provide the jaws engaging the outer surface of the shell; and means for applying a closing force to the jaws for controlling the width of said jet gap.
Claim 7
Dependent Claim
39 words
A mechanism for providing a deckle edge on a traveling porous web forming member in a paper machine constructed in accordance with claim 1: wherein an elastic plug member is clamped between the shell lips for closing the gap.
Claim 8
Dependent Claim
51 words
A fluid mechanism for directing a fluid jet against a traveling member in a paper machine constructed in accordance with claim 1: wherein said walls are positioned at the ends of said shell and one of said walls has a fluid delivery opening therethrough for directing fluid into the shell chamber.
Claim 9
Dependent Claim
59 words
A mechanism for directing a fluid jet against a traveling member in a paper machine constructed in accordance with claim 1: wherein said shell extends parallel to the edge of a traveling forming wire with the jet gap facing the wire adjacent its edge so that a deckle edge is formed on a web being formed on the wire.
Claim 10
Dependent Claim
59 words
A mechanism for directing a fluid jet against a traveling member in a paper machine constructed in accordance with claim 1: wherein said shell extends in a cross machine direction within the loop of a traveling fourdrinier wire on its return run with the gap directed at the wire to provide a stream of knock-off fluid through the wire.
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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |