US3762991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper machine foil support having controlled deflection
Assignee: Beloit Corp
•
Filing: 1970-11-30
•
Granted: 1973-10-02
•
Expires: 1990-11-30
Abstract
Abstract A dewatering foil for positioning beneath a traveling Fourdrinier wire of a paper making machine having a supporting beam pivotally mounted at its ends with the beam constructed relative to the foil so that in all positions of support it has a vertical downward component of deflection due to the force of the friction of the wire against the foil.
Inventors
- 👤 E Justus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:51
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/48; D21F1/483; D21F1/486
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
37 words
In a dewatering foil structure for the fourdrinier section of a paper making machine constructed in accordance with claim 1, the combination comprising: said end support being located directly below the contacting leading edge of the foil.
Claim 2
Dependent Claim
58 words
In a dewAtering foil structure for the fourdrinier section of a paper making machine constructed in accordance with claim 1, the combination comprising: said contacting, leading edge located relative to the center of gravity of the beam to form an angle of more than 30* with a line normal to the wire extending through said center of gravity.
Claim 3
Dependent Claim
42 words
In a dewatering foil structure for the fourdrinier section of a paper making machine constructed in accordance with claim 3: wherein said angle between the contacting leading edge and the center of gravity of the beam is between 40* and 50* .
Claim 4
Dependent Claim
40 words
In a dewatering foil structure for the fourdrinier section of a paper making machine constructed in accordance with claim 3: wherein said angle between said contacting leading edge and the center of gravity of the beam is substantially 45* .
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |