US4265706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drainage device with bonded wear surface and method of fabrication
Assignee: Albany International Corp
•
Filing: 1978-11-02
•
Granted: 1981-05-05
•
Expires: 1998-11-02
Abstract
Abstract A drainage device adapted to be mounted on a papermaking machine and positioned to support the moving web and to engage the undersurface of the web as it passes thereover to extract fluid downwardly from the web. The drainage device includes a main body portion and a multiplicity of wear resistant wafers bonded thereto with the upper surface of the wafers providing a bearing surface for the moving web as it passes thereover and the main body portion and the wafers having substantially the same coefficient of thermal expansion.
Inventors
- 👤 William M. Fulton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:09
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/48; D21F1/483
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
123 words
A drainage device adopted to be mounted on a papermaking machine under a moving web and positioned to support the web and to engage the undersurface of the web as it passes thereover to extract fluid downwardly from the web, the drainage device comprising; a main body portion, a multiplicity of wear resistant wafers, said main body portion and said wafers having substantially the same coefficient of thermal expansion, a bonding material affixing said wafers on the main body portion with the upper surface of the wafers forming a wear surface and an extraction surface for doctoring fluid from the moving web as it passes over said drainage device, and in which said wafers are rectangular and aligned in a multiplicity of rows.
Claim 2
Dependent Claim
123 words
A drainage device adopted to be mounted on a papermaking machine under a moving web and positioned to support the web and to engage the undersurface of the web as it passes thereover to extract fluid downwardly from the web, the drainage device comprising; a main body portion, a multiplicity of wear resistant wafers, said main body portion and said wafers having substantially the same coefficient of thermal expansion, a bonding material affixing said wafers on the main body portion with the upper surface of the wafers forming a wear surface and an extraction surface for doctoring fluid from the moving web as it passes over said drainage device, and in which said wafers are rectangular and aligned in a multiplicity of rows.
Claim 3
Dependent Claim
138 words
A drainage adopted to be mounted on a papermaking machine under a moving web and positioned to support the web and to engage the undersurface of the web as it passes thereover to extract fluid downwardly from the web, the drainage device comprising; a main body portion, a multiplicity of wear resistant wafers, said main body portion and said wafers having substantially the same coefficient of thermal expansion, a bonding material affixing said wafers on the main body portion with the upper surface of the wafers forming a wear surface and an extraction surface for doctoring fluid from the moving web as it passes over said drainage device, and in which said wafers are rectangular and aligned in rows with the wafers in each adjacent row being offset with respect to the wafers in the next adjacent row.
Claim 4
Dependent Claim
138 words
A drainage adopted to be mounted on a papermaking machine under a moving web and positioned to support the web and to engage the undersurface of the web as it passes thereover to extract fluid downwardly from the web, the drainage device comprising; a main body portion, a multiplicity of wear resistant wafers, said main body portion and said wafers having substantially the same coefficient of thermal expansion, a bonding material affixing said wafers on the main body portion with the upper surface of the wafers forming a wear surface and an extraction surface for doctoring fluid from the moving web as it passes over said drainage device, and in which said wafers are rectangular and aligned in rows with the wafers in each adjacent row being offset with respect to the wafers in the next adjacent row.
Claim 5
Dependent Claim
135 words
A drainage device adopted to be mounted on a papermaking machine under a moving web and positioned to support the web and to engage the undersurface of the web as it passes thereover to extract fluid downwardly from the web, the drainage device comprising; a main body portion, a multiplicity of wear resistant wafers, said main body portion and said wafers having substantially the same coefficient of thermal expansion,, a bonding material affixing said wafers on the main body portion with the upper surface of the wafers forming a wear surface and an extraction surface for doctoring fluid from the moving web as it passes over said drainage device, and in which said wafers are rectangular and wherein each wafer is approximately 2 inches in length, 5/8 inches wide and 1/8 of an inch thick.
Claim 6
Dependent Claim
135 words
A drainage device adopted to be mounted on a papermaking machine under a moving web and positioned to support the web and to engage the undersurface of the web as it passes thereover to extract fluid downwardly from the web, the drainage device comprising; a main body portion, a multiplicity of wear resistant wafers, said main body portion and said wafers having substantially the same coefficient of thermal expansion,, a bonding material affixing said wafers on the main body portion with the upper surface of the wafers forming a wear surface and an extraction surface for doctoring fluid from the moving web as it passes over said drainage device, and in which said wafers are rectangular and wherein each wafer is approximately 2 inches in length, 5/8 inches wide and 1/8 of an inch thick.
Claim 7
Dependent Claim
126 words
A drainage device adopted to be mounted on a papermaking machine under a moving web and positioned to support the web and to engage the undersurface of the web as it passes thereover to extract fluid downwardly from the web, the drainage device comprising; a main body portion, a multiplicity of wear resistant wafers, said main body portion and said wafers having substantially the same coefficient of thermal expansion, a bonding material affixing said wafers on the main body portion with the upper surface of the wafers forming a wear surface and an extraction surface for doctoring fluid from the moving web as it passes over said drainage device, and wherein a substrate of scrim material is affixed between the main body portion and the wafers.
Claim 8
Dependent Claim
126 words
A drainage device adopted to be mounted on a papermaking machine under a moving web and positioned to support the web and to engage the undersurface of the web as it passes thereover to extract fluid downwardly from the web, the drainage device comprising; a main body portion, a multiplicity of wear resistant wafers, said main body portion and said wafers having substantially the same coefficient of thermal expansion, a bonding material affixing said wafers on the main body portion with the upper surface of the wafers forming a wear surface and an extraction surface for doctoring fluid from the moving web as it passes over said drainage device, and wherein a substrate of scrim material is affixed between the main body portion and the wafers.
References Cited (Backward Citations)
CA772393A
Cited
US3067816A
Cited
US3393124A
Cited
US3351524A
Cited
US3250671A
Cited
US3446702A
Cited
GB1403158A
Cited
US4004969A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-04 | 1984-11-03 | 1985-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-04 | 1988-11-03 | 1989-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-04 | 1992-11-03 | 1993-05-05 | $7700.00 | Window Closed / Lapsed |