US3779686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous action sheet press
Assignee: Individual
•
Filing: 1972-02-24
•
Granted: 1973-12-18
•
Expires: 1992-02-24
Abstract
Abstract A continuous action sheet press wherein the sheet material to be pressed is conducted into a gap between two moving surfaces, at least one of which is urged towards the sheet material to be pressed, by the aid of a pressure chamber. According to the invention the width of the pressure chamber varies in the direction of travel of the sheet material to be pressed.
Inventors
- 👤 I Kerttula
- 👤 P Jaatinen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:15
CPC Classifications
B; B30; B30B; B30B5/00; B30B5/04; B30B5/06; B30B5/062
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
76 words
A continuous action sheet press comprising two moving surfaces defining a press gap therebetween, the material to be pressed being conducted into said press gap to form a sheet therefrom, and a pressure chamber provided with pressure fluid acting on at least one of the moving surfaces to apply additional pressure to the material in the gap, said pressure chamber having a width which varies in the direction of travel of the material to be pressed.
Claim 2
Dependent Claim
76 words
A continuous action sheet press comprising two moving surfaces defining a press gap therebetween, the material to be pressed being conducted into said press gap to form a sheet therefrom, and a pressure chamber provided with pressure fluid acting on at least one of the moving surfaces to apply additional pressure to the material in the gap, said pressure chamber having a width which varies in the direction of travel of the material to be pressed.
Claim 3
Dependent Claim
43 words
A sheet press according to claim 1 comprising transverse beams interposed between the pressure chamber and the material to be pressed, and means for advancing the transverse beams along with the material, said transverse beams extending over the entire width of the sheet.
Claim 4
Dependent Claim
36 words
A sheet press according to claim 2 comprising a conveyor positioned adjacent said press gap to transfer the transverse beam at the discharge end of the press gap to the inlet end of the press gap.
Claim 5
Dependent Claim
27 words
A sheet press according to claim 3, wherein said conveyor has a speed of travel which is higher than the forward speed of travel of the sheet.
Claim 6
Dependent Claim
22 words
A sheet press according to claim 2, wherein the transverse beams traveling with the sheet are chain members of an endless chain.
Claim 7
Dependent Claim
23 words
A sheet press according to claim 1, wherein the pressure chamber is divided into at least two branches extending longitudinally of the sheet.
Claim 8
Dependent Claim
23 words
A sheet press according to claim 1, wherein said pressure chamber includes walls which are displaceable in a direction transverse to the sheet.
Claim 9
Dependent Claim
24 words
A sheet press according to claim 8, wherein said width of the pressure chamber diminishes substantially in the direction of travel of the material.
References Cited (Backward Citations)
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Cited
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Cited
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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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |