EP0251779A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Support apparatus for a dewatering unit in the web-forming section of a paper making machine
Assignee: Ahlstrom Corp
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Filing: 1987-07-01
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Granted: —
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Expires: 2007-07-01
Abstract
Abstract The present invention relates to support apparatus of a dewatering unit (30) below a bottom wire of the twin wire forming section of a paper or board manufacturing machine. The problem in known, corresponding arrangements has been insufficient crosswise stiffness of the dewatering unit and lack of adjustability. The above-mentioned disadvantages have been eliminated or minimized by a support arrangement characterised in that the dewatering unit (30) is supported on beams (36) transversely in view of the machine direction by means of hose-like pressure-medium filled elements (37), which also allow a longitudinal adjustment of the dewatering unit by means of an adjusting element (38).
Inventors
- 👤 Taisto Nevalainen
- 👤 Tapani Nyman
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 20:21
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/36; D21F1/48; D21F1/52
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
100 words
Support apparatus of a dewatering unit of a paper making machine, said unit (30) being disposed below the lower endless mesh web or "bottom wire" and including dewatering elements (32, 33) which form a substantially stiff wire-contacting means or cover (34, 35), characterised in that the cover (34, 35) is supported, at least at one side which is transverse with respect to the direction of extension of the machine, by means of expansible flexible vessel means or a hose-like pressure medium-filled element (37) supported on a beam (36) disposed transversely with respect to the direction of extension of the machine.
Claim 2
Dependent Claim
100 words
Support apparatus of a dewatering unit of a paper making machine, said unit (30) being disposed below the lower endless mesh web or "bottom wire" and including dewatering elements (32, 33) which form a substantially stiff wire-contacting means or cover (34, 35), characterised in that the cover (34, 35) is supported, at least at one side which is transverse with respect to the direction of extension of the machine, by means of expansible flexible vessel means or a hose-like pressure medium-filled element (37) supported on a beam (36) disposed transversely with respect to the direction of extension of the machine.
Claim 3
Dependent Claim
48 words
Support apparatus in accordance with claim 1, characterised in that there are a plurality of covers (34, 35) and that they are united by a joint and that a hose-like pressure-medium filled element (37) is arranged so as to support the covers (34, 35) through a joint (31).
Claim 4
Dependent Claim
34 words
Support apparatus in accordance with claim 1, characterised in that the cover/covers (34, 35) at all sides, disposed transversely in view of the machine, are supported by means of hose-like pressure-medium filled elements (37).
Claim 5
Dependent Claim
22 words
Support apparatus in accordance with claim 1, characterised in that the hose-like pressure-medium filled elements (37) are divided lengthwise into several parts.
Claim 6
Dependent Claim
25 words
Support apparatus in accordance with claim 1, characterised in that the pressure of each longitudinal part of the pressure-medium filled elements (37) is independently adjustable.
Claim 7
Dependent Claim
40 words
Support apparatus in accordance with claim 1, characterised in that the position of the pressure-medium filled element (37) on the beams (36) enables transfer of the covers (34, 35) longitudinally with regard to the direction of extension of the machine.
Claim 8
Dependent Claim
45 words
Support apparatus in accordance with claims 1 and 6, characterised in that the cover (34) is attached to the machine frame or equivalent by means of one or more adjusting elements (38) disposed longitudinally with regard to the direction to the extension of the machine.
References Cited (Backward Citations)
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