US4457683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Belt-type press
Assignee: G Siempelkamp GmbH and Co KG
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Filing: 1983-03-02
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Granted: 1984-07-03
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Expires: 2003-03-02
Abstract
Abstract A press comprises a drum having a heated outer surface and rotatable about an axis and at least one endless belt radially juxtaposed with a portion of the outer drum surface and consisting mainly of an elastically deformable matrix and a plurality of parallel, twisted, and generally annular multifilament cords axially spaced from one another and formed of yarns of an aromatic polyamide imbedded in the matrix. The belt is tensioned and thereby urged radially toward the drum-surface portion. Thus the belt and the drum-surface portion form an angularly extending pressing region. A web to be compressed is fed tangentially to one end of the pressing region and is withdrawn it from the other end thereof. A drive rotates the drum and thereby displaces the web and the belt angularly along the portion so that the web is compressed against and heated by the drum. The cords according to this invention are formed as cables.
Inventors
- 👤 Klaus Gerhardt
- 👤 Dieter Goertz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:47
CPC Classifications
B; B30; B30B; B30B9/00; B30B9/02; B30B9/04
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
154 words
A press for continuously compressing a web, the press comprising: a drum having a heated outer surface and rotatable about an axis; at least one endless belt radially juxtaposed with a portion of the outer drum surface and consisting mainly of an elastically deformable matrix, and a plurality of parallel, twisted, and generally annular multifilament cords axially spaced from one another and formed of yarns of an aromatic polyamide imbedded in the matrix; means for tensioning the belt and thereby urging it radially toward the drum-surface portion, whereby the belt and the drum-surface portion form an angularly extending pressing region; means for feeding the web to be compressed tangentially to one end of the pressing region and for withdrawing it from the other end thereof; and means for rotating the drum and thereby displacing the web and the belt angularly along the portion, whereby the web is compressed against and heated by the drum.
Claim 2
Dependent Claim
154 words
A press for continuously compressing a web, the press comprising: a drum having a heated outer surface and rotatable about an axis; at least one endless belt radially juxtaposed with a portion of the outer drum surface and consisting mainly of an elastically deformable matrix, and a plurality of parallel, twisted, and generally annular multifilament cords axially spaced from one another and formed of yarns of an aromatic polyamide imbedded in the matrix; means for tensioning the belt and thereby urging it radially toward the drum-surface portion, whereby the belt and the drum-surface portion form an angularly extending pressing region; means for feeding the web to be compressed tangentially to one end of the pressing region and for withdrawing it from the other end thereof; and means for rotating the drum and thereby displacing the web and the belt angularly along the portion, whereby the web is compressed against and heated by the drum.
Claim 3
Dependent Claim
12 words
The belt-type press defined in claim 1 wherein the cords are cables.
Claim 4
Dependent Claim
47 words
The belt-type press defined in claim 2 wherein the cords have: a core formed of a plurality of filaments stabilized together by a binder; an unbound multifilament intermediate layer overlying the core; and an outer layer formed of a plurality of filaments stabilized together by a binder.
Claim 5
Dependent Claim
17 words
The belt-type press defined in claim 3 wherein the intermediate layer is provided with an interfilament lubricant.
Claim 6
Dependent Claim
25 words
The belt-type press defined in claim 2 wherein the yarns are formed of staple fibers and have a twist of about 40 turns per meter.
Claim 7
Dependent Claim
21 words
The belt-type press defined in claim 1 wherein the cords are cables with a twist of about 15 turns per meter.
Claim 8
Dependent Claim
12 words
The belt-type press defined in claim 1 wherein the cords are yarns.
Claim 9
Dependent Claim
18 words
The belt-type press defined in claim 1 wherein the cords are all twisted and in the same direction.
Claim 10
Dependent Claim
21 words
The belt-type press defined in claim 1 wherein the cords are generally of rectangular section and lie immediately adjacent one another.
Claim 11
Dependent Claim
13 words
The belt-type press defined in claim 1 wherein the aromatic polyamide is Kevlar.
Claim 12
Dependent Claim
31 words
The belt-type press defined in claim 1 wherein the cords are substantially straight and smooth and the belt further comprises connecting filaments tranverse to the cords and imbedded in the matrix.
Claim 13
Dependent Claim
14 words
The belt-type press defined in claim 1 wherein the cords are separate and endless.
Claim 14
Dependent Claim
21 words
The belt-type press defined in claim 1 wherein a single strand has a plurality of turns each constituting a respective cord.
Claim 15
Dependent Claim
18 words
The belt-type press defined in claim 1 wherein several layers of such cords are imbedded in the matrix.
Claim 16
Dependent Claim
20 words
The belt-type press defined in claim 1 wherein the belt has faces provided with textile coverings that resist transverse deformation.
Claim 17
Dependent Claim
23 words
The belt-type press defined in claim 1 wherein the belt has reinforced edges and is of greater rigidity at the edges than therebetween.
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) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |