Patent US4964943A successfully refreshed from Google Patents.
US4964943A
Expired / Lapsed
US
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Device for thermally joining ends of conveyor belts
Assignee: F E SCHULTE STRATHAUS KG MAX-PLANCK-STRASSE 8 D-4750 UNNA GERMANY
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Filing: 1987-05-02
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Granted: 1990-10-23
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Expires: 2007-05-02
Abstract
Abstract A press platen, for bonding ends of a conveyor belt, having both heating and cooling means, the heating means being electrical resistance elements positioned in grooves bars, within the platen, which bars also define cooling channels therein.
Inventors
- 👤 Manfred Kruger
- 👤 Franz-Erich Schulte Strathaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:18
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/06; B30B15/062; B30B15/064; B29; B29C; B29C33/00; B29C33/02; B29C65/00; B29C65/02; B29C65/18; B29C66/00; B29C66/80; B29C66/81; B29C66/814; B29C66/8141; B29C66/81427; B29C66/81431; B29C66/818; B29C66/8181; B29C66/81811; B29C66/8182; B29C66/81821; B29C66/81411; B29C66/81421; B29C66/81423; B29L; B29L2031/00; B29L2031/709; B29L2031/7092; Y; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/13
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
89 words
A device for heat bonding at least two conveyor belt ends, with pressure plates having heating and cooling elements on their insides, comprising sectional aluminum bars arranged inside each plate, defining longitudinal heating channels and cooling channels wherein at least some of the channels are connected with each other in end regions thereof arc-shaped channels and wherein each sectional aluminum bar has at least one said heating channel for receiving a heating element and at least one said coating channel being spatially seperated from the one said heating channel.
Claim 2
Independent Claim
89 words
A device for heat bonding at least two conveyor belt ends, with pressure plates having heating and cooling elements on their insides, comprising sectional aluminum bars arranged inside each plate, defining longitudinal heating channels and cooling channels wherein at least some of the channels are connected with each other in end regions thereof arc-shaped channels and wherein each sectional aluminum bar has at least one said heating channel for receiving a heating element and at least one said coating channel being spatially seperated from the one said heating channel.
Claim 3
Dependent Claim
18 words
A device according to claim 1 the channels in the aluminum bars being polygonal or circular in cross-section.
Claim 4
Dependent Claim
22 words
A device according to claim 1, wherein the heating channels for the heating elements are smaller in cross-section than the cooling channels.
Claim 5
Dependent Claim
44 words
A device according to claim 1, a layer of corrugated or zigzag light metal plate and intermediate layers being placed upon the aluminum bars with the heating and cooling channels, profiling of the additional layers being oriented transversely to the heating and cooling channels.
Claim 6
Dependent Claim
35 words
A device according to claim 1, wherein the heating channels defined by the bars are at least partially equipped with resistance heating elements arranged in said channels to be longitudinally movable relative to the bars.
Claim 7
Dependent Claim
15 words
Device according to claim 1, wherein the aluminum bars are arranged in a steel housing.
Claim 8
Dependent Claim
23 words
Device according to claim 1, wherein the aluminum bars together with aluminum cover plates or intermediate plates are enclosed by special steel plates.
Claim 9
Dependent Claim
29 words
A device according to claim 1 wherein the heating channels formed by the bars are at least partially equipped with resistance heating elements which are fixed in said channels.
Claim 10
Dependent Claim
30 words
A device according to claim 8, the heating elements being arranged in spiral or meamdering shape through a plurality of said heating channels and arc-shaped channels in end plate elements.
Claim 11
Dependent Claim
29 words
A device according to claim 1, the heating elements being retained in the heating channels by a flat aluminum bar pressed into each heating channel without inclusion of air.
Claim 12
Dependent Claim
44 words
Device according to claim 10, wherein wall structure of a pressure plate facing towards the heating side comprises the following arrangement of layers viewed from the outside towards the inside: steel plate, heat insulating plate, copper plate, heat insulating plate and aluminum profile bars.
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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) | 1993-10-22 | 1994-04-23 | 1994-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-22 | 1998-04-23 | 1998-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-22 | 2002-04-23 | 2002-10-23 | $7700.00 | Window Closed / Lapsed |