US4563244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling deposition of a liquid onto a moving surface
Assignee: Wiggins Teape Group Ltd
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Filing: 1983-11-23
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Granted: 1986-01-07
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Expires: 2003-11-23
Abstract
Abstract Apparatus is known for controlling the deposition of a liquid onto a moving surface comprising a reservoir having an outlet, and a curved guide member downwardly extending from above and adjacent to the outlet and having an underside onto which a jet of liquid can be discharged from the outlet, the guide member being oriented so as to be capable of causing liquid to flow down the member on its underside so that its direction of flow approaches the direction of travel of a moving surface. This invention is characterized in that two aprons are provided at the lower edge of the reservoir outlet so as to extend beneath the jet being discharged from the outlet, the first of the said aprons extending only part of the distance towards the moving surface and the second of the said aprons extending beneath the said apron so that the free end thereof is substantially in contact with the moving surface, the arrangement being such that the lower edge of the first apron is in engagement with the upper surface of the second apron.
Inventors
- 👤 Alexander Syed
- 👤 Rowena Smillie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:40
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/02; D21F1/028
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
191 words
Apparatus for controlling the deposition of a liquid onto a horizontally extending moving surface, comprising a reservoir spaced from and above said moving surface and having an outlet extending transversely of said surface, said outlet being defined by upper and lower edges, and a curved guide member extending downwardly from the upper edge of said outlet so as to present a downwardly convex face, for guiding a film of liquid projecting from said outlet down said face so that the direction of liquid flow approaches the direction of travel of the moving surface, the apparatus further comprising two flexible aprons extending substantially from the lower edge of the said outlet beneath and into engagement with the liquid film flowing down the guide member, the first of the said aprons extending only part of the distance towards the moving surface and having a lower edge, the second of the said aprons extending beneath the said first apron and having a free end substantially in contact with the moving surface, the arrangement being such that the lower edge of the first apron is in engagement with an upper surface on the second apron.
Claim 2
Dependent Claim
191 words
Apparatus for controlling the deposition of a liquid onto a horizontally extending moving surface, comprising a reservoir spaced from and above said moving surface and having an outlet extending transversely of said surface, said outlet being defined by upper and lower edges, and a curved guide member extending downwardly from the upper edge of said outlet so as to present a downwardly convex face, for guiding a film of liquid projecting from said outlet down said face so that the direction of liquid flow approaches the direction of travel of the moving surface, the apparatus further comprising two flexible aprons extending substantially from the lower edge of the said outlet beneath and into engagement with the liquid film flowing down the guide member, the first of the said aprons extending only part of the distance towards the moving surface and having a lower edge, the second of the said aprons extending beneath the said first apron and having a free end substantially in contact with the moving surface, the arrangement being such that the lower edge of the first apron is in engagement with an upper surface on the second apron.
Claim 3
Dependent Claim
20 words
Apparatus as claimed in claim 1, in which means are provided for clamping the two aprons in their required positions.
Claim 4
Dependent Claim
25 words
Apparatus as claimed in claim 2 in which each apron is stored on a reel from which it can be unreeled to the extent required.
Claim 5
Dependent Claim
16 words
Apparatus as claimed in claim 1 in which the aprons are each made of impermeable film.
Claim 6
Dependent Claim
15 words
Apparatus as claimed in claim 4 in which the aprons are made from polyester film.
Claim 7
Dependent Claim
16 words
Apparatus as claimed in claim 2 in which the aprons are each made of impermeable film.
Claim 8
Dependent Claim
16 words
Apparatus as claimed in claim 3 in which the aprons are each made of impermeable film.
Claim 9
Dependent Claim
228 words
Apparatus for controlling the deposition of a liquid onto a horizontally extending moving surface, comprising a reservoir spaced from and above said moving surface and having an outlet extending transversely of said surface, said outlet being defined by upper and lower edges, and a curved guide member extending downwardly from the upper edge of said outlet so as to present a downwardly convex face, for guiding a film of liquid projecting from said outlet down said face so that the direction of liquid flow approaches the direction of travel of the moving surface, a first apron extending substantially from the lower edge of the said outlet beneath and into engagement with the liquid film flowing down the guide member, the first apron extending only part of the distance towards the moving surface and having a lower edge, the apparatus further comprising means for reducing flow induced instabilities at the lower edge, the means including a second flexible apron extending substantially from the lower edge of the said outlet beneath and into engagement with the liquid film flowing down the guide member, the second of the said aprons extending beneath the said first apron and having a free end substantially in contact with the moving surface, the arrangement being such that the lower edge of the first apron is in engagement with an upper surface on the second apron.
Claim 10
Dependent Claim
228 words
Apparatus for controlling the deposition of a liquid onto a horizontally extending moving surface, comprising a reservoir spaced from and above said moving surface and having an outlet extending transversely of said surface, said outlet being defined by upper and lower edges, and a curved guide member extending downwardly from the upper edge of said outlet so as to present a downwardly convex face, for guiding a film of liquid projecting from said outlet down said face so that the direction of liquid flow approaches the direction of travel of the moving surface, a first apron extending substantially from the lower edge of the said outlet beneath and into engagement with the liquid film flowing down the guide member, the first apron extending only part of the distance towards the moving surface and having a lower edge, the apparatus further comprising means for reducing flow induced instabilities at the lower edge, the means including a second flexible apron extending substantially from the lower edge of the said outlet beneath and into engagement with the liquid film flowing down the guide member, the second of the said aprons extending beneath the said first apron and having a free end substantially in contact with the moving surface, the arrangement being such that the lower edge of the first apron is in engagement with an upper surface on the second apron.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-06 | 1989-07-08 | 1990-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-06 | 1993-07-08 | 1994-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-06 | 1997-07-08 | 1998-01-07 | $7700.00 | Window Closed / Lapsed |