US3860368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous action board press
Assignee: Individual
•
Filing: 1973-04-04
•
Granted: 1975-01-14
•
Expires: 1993-04-04
Abstract
Abstract Continuous action board press wherein the board material to be pressed is fed into a press gap between two moving surfaces, at least one of which is provided by an endless belt loaded with the aid of a pressure chamber to be urged against the board material to be pressed and thus against the opposite press surface. The endless belt consists of a material attracted by a magnet and, adjacent the end of the pressure chamber, at least one magnet is placed, which gives rise in the belt to a force opposite in direction to that produced by the pressure medium.
Inventors
- 👤 Into Kerttula
- 👤 Per Arno Jaatinen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:29
CPC Classifications
B; B27; B27N; B27N3/00; B27N3/08; B27N3/24; B30; B30B; B30B5/00; B30B5/04; B30B5/06; Y; Y10; Y10S; Y10S100/00; Y10S100/917
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
129 words
A continuous action board press comprising means defining a press gap between two moving surfaces and including at least one endless belt providing at least one of said surfaces, board material fed into said press gap, a pressure chamber loading said belt to urge the same against the board material to be pressed and thus towards the opposite press surface, the endless belt including a material adapted for being attracted by a magnet, said pressure chamber including leading and trailing ends relative to the direction of feed of the board material, and adjacent at least one end of the pressure chamber, and at least one magnet which gives rise in the belt to a force opposite in direction to that produced by a pressure medium in said pressure chamber.
Claim 2
Dependent Claim
129 words
A continuous action board press comprising means defining a press gap between two moving surfaces and including at least one endless belt providing at least one of said surfaces, board material fed into said press gap, a pressure chamber loading said belt to urge the same against the board material to be pressed and thus towards the opposite press surface, the endless belt including a material adapted for being attracted by a magnet, said pressure chamber including leading and trailing ends relative to the direction of feed of the board material, and adjacent at least one end of the pressure chamber, and at least one magnet which gives rise in the belt to a force opposite in direction to that produced by a pressure medium in said pressure chamber.
Claim 3
Dependent Claim
45 words
A board press according to claim 1, wherein adjacent an end of the pressure chamber a plurality of consecutively arranged magnets are arranged, said magnets having an attractive force acting on the belt which force increases towards the said one end of the pressure chamber.
Claim 4
Dependent Claim
35 words
A board press according to claim 1, comprising between the magnet and the endless belt, an insulation means by which the attractive force of the magnet acting on the belt can be adjusted as desired.
Claim 5
Dependent Claim
15 words
A board press according to claim 3, wherein the insulation means provides an air gap.
Claim 6
Dependent Claim
15 words
A board press according to claim 3, wherein the insulation means includes an insulating body.
Claim 7
Dependent Claim
40 words
A board press according to claim 2, wherein the magnets are so arranged that the attractive force exerted on the belt by the magnets is variable, comprising between the magnets and belt, insulating bodies of materials having different magnetic properties.
Claim 8
Dependent Claim
32 words
A board press according to claim 1, wherein said magnet includes one pole disposed close to the leading end of the pressure chamber and an opposite pole close to the trailing end.
Claim 9
Dependent Claim
21 words
A board press according to claim 1 wherein the first said means includes an endless belt facing the first said belt.
Claim 10
Dependent Claim
15 words
A board press according to claim 8 wherein said magnet acts on both said belts.
Claim 11
Dependent Claim
13 words
A board press according to claim 1, wherein the magnet is an electromagnet.
Claim 12
Dependent Claim
26 words
A board press according to claim 10, wherein the attractive force of the magnet is adjusted by changing the intensity of current fed to the coil.
References Cited (Backward Citations)
US1561063A
Cited
US2430285A
Cited
US3067718A
Cited
US3206800A
Cited
US3413915A
Cited
US3620158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |