Patent US4541889A successfully refreshed from Google Patents.
US4541889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual-belt press for the continuous production of laminates
Assignee: Individual
•
Filing: 1984-07-10
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Granted: 1985-09-17
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Expires: 2004-07-10
Abstract
Abstract The invention relates to a dual belt press for the continuous production of laminates with two heated, rotating endless belts running over rollers, the laminate being guided between the opposite outsides of said belts, with heating plates which, through annularly enclosed seals, contact the insides of the endless belts, and with a fluid, pressure-cushion-forming pressure medium in the spaces formed by the seals, belt insides and heating plates to exert the necessary pressing force on the laminate. To improve the transfer of heat from the heating plate to the reaction zone it is proposed that the spaces filled with the pressure cushion contain additional heat bridges which, in forming a good thermal conduction contact, are, on one side, connected to the heating plates and, on the other side, rubbingly contact the belt insides.
Inventors
- 👤 Kurt Held
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:15
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/34; B27; B27D; B27D3/00; B27D3/04; B27N; B27N3/00; B27N3/08; B27N3/24; B30B5/00; B30B5/04; B30B5/06; B30B5/062; B32; B32B; B32B37/00; B32B37/10; B32B2037/1081; H; H05; H05K; H05K3/00; H05K3/02; H05K3/022; Y; Y10; Y10T; Y10T156/00; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T156/1741
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
113 words
Dual-belt press for the continuous production of laminates with two heated, rotating endless belts running over rollers, the laminate being guided between the opposite outsides of said belts, with heating plates which, through annularly enclosed seals, contact the insides of the endless belts, and with a fluid, pressure-cushion-forming pressure medium in the spaces formed by the seals, belt insides and heating plates to exert the necessary pressing force on the laminate, wherein the spaces filled with the pressure cushion contain additional heat bridges (23) which, in forming a good thermal conduction contact, are, on one side, connected to the heating plates (16, 17) and, on the other side, rubbingly contact the belt insides.
Claim 2
Dependent Claim
113 words
Dual-belt press for the continuous production of laminates with two heated, rotating endless belts running over rollers, the laminate being guided between the opposite outsides of said belts, with heating plates which, through annularly enclosed seals, contact the insides of the endless belts, and with a fluid, pressure-cushion-forming pressure medium in the spaces formed by the seals, belt insides and heating plates to exert the necessary pressing force on the laminate, wherein the spaces filled with the pressure cushion contain additional heat bridges (23) which, in forming a good thermal conduction contact, are, on one side, connected to the heating plates (16, 17) and, on the other side, rubbingly contact the belt insides.
Claim 3
Dependent Claim
33 words
Press as defined in claim 1, wherein the surfaces of the heating plates (16, 17) facing the belt insides exhibit recesses which are engaged by complementary projections mounted on the heat bridges (23).
Claim 4
Dependent Claim
51 words
Press as defined in claim 1, wherein the surfaces of the heating plates (16, 17) facing the belt insides exhibit grooves (24) into which slide bars (25) are inserted as heat bridges, whereby a surface of said slide bars facing away from the groove is in contact with the belt inside.
Claim 5
Dependent Claim
20 words
Press as defined in claim 3, wherein the slide bars (25) consist of a metal matrix containing graphite as lubricant.
Claim 6
Dependent Claim
16 words
Press as defined in claim 4, wherein the slide bars (28) have a U-shaped cross section.
Claim 7
Dependent Claim
16 words
Press as defined in claim 3, wherein the slide bars (28) have a U-shaped cross section.
Claim 8
Dependent Claim
26 words
Press as defined in claim 6, wherein the U-sectioned slide bars (28) are pressed against the walls of the groove (24) by a flexible core (30).
Claim 9
Dependent Claim
17 words
Press as defined in claim 1, wherein the heat bridges are in the form of bristles (33).
Claim 10
Dependent Claim
29 words
Press as defined in claim 1, wherein the heat bridges are in the form of springs (34) which through their spring force are in contact with the belt insides.
Claim 11
Dependent Claim
22 words
Press as defined in any one of claims 1-3 or 8-9, wherein the heat bridges are pressed magnetically against the belt insides.
Claim 12
Dependent Claim
42 words
Press as defined in any one of claims 1-3 or 8-9, wherein friction bars (36) are provided which contact the belt insides with such pressure that in the area of contact additional heat of friction is generated in the belt (13, 14).
Claim 13
Dependent Claim
28 words
Press as defined in claim 11, wherein the heat bridges (23) and/or friction bars (36) can be lifted off the belt inside individually, in groups or all together.
Claim 14
Dependent Claim
30 words
Press as defined in claim 10, wherein the heat bridges (23) and/or friction bars (36) can, pneumatically or hydraulically, be pressed against the belt insides and/or lifted off the latter.
Claim 15
Dependent Claim
24 words
Press as defined in claim 1 wherein the heat bridges (23) can be lifted off the belt inside individually, in groups or all together.
Claim 16
Dependent Claim
50 words
Press as defined in any one of claims 1-3, 8-9, or 14, wherein the heating plate (16, 17) exhibits channels (32) to accept a heating fluid whereby, by means of recesses or projections, the walls of the channels have an enlarged surface area for the purpose of better heat transfer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-16 | 1989-03-18 | 1989-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-16 | 1993-03-18 | 1993-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-16 | 1997-03-18 | 1997-09-17 | $7700.00 | Window Closed / Lapsed |