US3668787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilating device for a multicylinder drier
Assignee: Valmet Montreal Inc
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Filing: 1970-09-01
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Granted: 1972-06-13
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Expires: 1990-09-01
Abstract
Abstract A device is used for ventilating a pocket of a multicylinder drier. The pocket consists of a felt guided by a felt roll. A partition extends transversely to the felt and is located opposite the felt roll belonging to the pocket. The invention is particularly characterized in that the marginal part of the partition pointing toward the felt roll consists of sections each of which has its own adjusting device so that a gap of desired width for the flow of air may be produced between the surface of the felt roll and the edge of the section.
Inventors
- 👤 Nils-Christian Berg
- 👤 Mauri Aatos Soininen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:48
CPC Classifications
F; F26; F26B; F26B13/00; F26B13/10; F26B13/14; F26B13/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
242 words
Device for ventilating a pocket (5) of a multicylinder drier provided with drying felts permeable to air, which pocket is defined by a felt (4) guided by a felt roll (2), by two freely travelling web portions (3) and by the surface of the drying cylinder (10) between them and is open at its ends, this device consisting of a partition (7) transversal to the felt and placed opposite to the felt roll (2) belonging to the pocket (5), outside the pocket (5) between two drying cylinders (1a, 1b) and one edge of which extends close to the surface of the felt roll (2), said partition (7) dividing the space between the drying cylinders into two parts from one of which an air flow induced by the running machine flows in the direction towards the pocket and into the other of which air flows in the direction away from the pocket, characterized in that the marginal part of said partition (7) pointing towards the felt roll consists of sections (7'') forming each others'' continuations in the direction across the felt and each of which has been provided with individual adjusting devices for such adjustment that between the surface of the felt roll (2) and the edge of the section (7'') a gap of desired width can be produced, through which air may flow in the direction of rotation of the felt roll (2) from one side to the other of the partition.
Claim 2
Dependent Claim
242 words
Device for ventilating a pocket (5) of a multicylinder drier provided with drying felts permeable to air, which pocket is defined by a felt (4) guided by a felt roll (2), by two freely travelling web portions (3) and by the surface of the drying cylinder (10) between them and is open at its ends, this device consisting of a partition (7) transversal to the felt and placed opposite to the felt roll (2) belonging to the pocket (5), outside the pocket (5) between two drying cylinders (1a, 1b) and one edge of which extends close to the surface of the felt roll (2), said partition (7) dividing the space between the drying cylinders into two parts from one of which an air flow induced by the running machine flows in the direction towards the pocket and into the other of which air flows in the direction away from the pocket, characterized in that the marginal part of said partition (7) pointing towards the felt roll consists of sections (7'') forming each others'' continuations in the direction across the felt and each of which has been provided with individual adjusting devices for such adjustment that between the surface of the felt roll (2) and the edge of the section (7'') a gap of desired width can be produced, through which air may flow in the direction of rotation of the felt roll (2) from one side to the other of the partition.
Claim 3
Dependent Claim
31 words
Device according to claim 1, characterized in that the sections (7'') constituting the marginal part of the partition pointing towards the felt roll (2) are turnably attached to the partition (7).
Claim 4
Dependent Claim
52 words
Device according to claim 1, characterized in that the partition in its entirety or at least its marginal part closest to thE felt roll (2) consists of sections (7'') transversal to the felt (4) which are movable in radial direction with reference to the surface of the felt roll (2), like shutters.
Claim 5
Dependent Claim
114 words
Device according to claim 1, characterized in that on the side of the partition (7) from which flow into the pocket (5) takes place there has been placed corresponding to each section (7'') of the partition a nozzle (9) introducing fresh air and provided with a closing device (10), its closing device being arranged to operate so that when the free edge of the section (7'') is in its position closest to the surface of the felt roll (2) the closing device (10) is open, while it is closed when the section (7'') is in the position in which the gap between the section (7'') and the felt roll (2) is at its largest.
Claim 6
Dependent Claim
140 words
Device according to claim 2, characterized in that the partition consists of an air supply box under pressure and having a nozzle slit at each turnable section (7'') in the marginal part of the partition which supplies air flow into the space between the partition and the drying cylinder from which flow into the pocket (5) takes place, and the sections (7'') constituting the marginal part of the partition being arranged to operate so that when a section (7'') is in its position pointing towards the felt roll (2) the nozzle is open and air flows from it parallel to the section towards the felt roll (2), but when the section (7'') is in its upturned position, in which the gap between it and the felt roll (2) is open, the air flow is directed against the drying cylinder (1b).
Claim 7
Dependent Claim
20 words
Device according to claim 1, including means forming an air curtain between said partition and one of said drying cylinders.
References Cited (Backward Citations)
US3110575A
Cited
US3376653A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |