US3645843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid control of headbox slice opening
Assignee: Beloit Corp
•
Filing: 1970-04-30
•
Granted: 1972-02-29
•
Expires: 1990-04-30
Abstract
Abstract A control for the headbox slice opening of a papermaking machine in which the slice is position controlled by pneumatic means, such that the load upon the slice lips is transferred to a heavy frame member. Air blocks are mounted between the slice lip and the heavy frame member to allow precise position control of the slice lips.
Inventors
- 👤 John F Schmaeng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:39
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/02; D21F1/028
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
92 words
A papermaking machine comprising: a headbox; a breast roll in operative association with the headbox; a Fourdrinier wire turning about said breast roll; an upper slice lip pivotally attached to said headbox and extending therefrom over the breast roll and Fourdrinier wire; frame means connected to said breast roll and supporting said breast roll for rotation; a beam attached to said frame above said slice lip; and fluid pressure means mounted between said beam and said upper slice lip to adjust the tip of said slice lip relative to said breast roll.
Claim 2
Dependent Claim
92 words
A papermaking machine comprising: a headbox; a breast roll in operative association with the headbox; a Fourdrinier wire turning about said breast roll; an upper slice lip pivotally attached to said headbox and extending therefrom over the breast roll and Fourdrinier wire; frame means connected to said breast roll and supporting said breast roll for rotation; a beam attached to said frame above said slice lip; and fluid pressure means mounted between said beam and said upper slice lip to adjust the tip of said slice lip relative to said breast roll.
Claim 3
Dependent Claim
53 words
The papermaking machine of claim 1 wherein a slice lip support is attached to said upper slice lip and said fluid pressure means engages said slice lip support and adjusts said slice lip along a radial line extending through the axis of rotation of said breast roLl by moving said slice lip support.
Claim 4
Dependent Claim
20 words
The papermaking machine according to claim 2 wherein a pivot pin pivotally attaches said upper slice lip to said headbox.
Claim 5
Dependent Claim
17 words
A papermaking machine according to claim 3 wherein said fluid pressure means comprises a flexible fluid container.
Claim 6
Dependent Claim
27 words
A papermaking machine according to claim 4 comprising a supply tank fluidly connected to the flexible fluid container to control the position of said upper slice lip.
Claim 7
Dependent Claim
29 words
A papermaking machine according to claim 5 comprising valve means connected between said flexible fluid container and said supply tank to control the pressure in said flexible fluid container.
Claim 8
Dependent Claim
43 words
The papermaking machine according to claim 6 including dimensional reference means for indicating the position of the slice lip relative to said breast roll and comprising a first portion mounted on said frame and a second portion mounted on said upper slice lip.
Claim 9
Dependent Claim
25 words
A papermaking machine according to claim 6 comprising compression pads mounted on either sides of the flexible fluid container to distribute load over the container.
References Cited (Backward Citations)
US2928464A
Cited
US3562106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |