Title: Twin-wire paper manufacturing machines

Abstract: A twin-wire paper manufacturing machine wherein endless main and auxiliary wires are situated directly next to each other only at a convex forming surface of a forming board so that the compacting of the web takes place only between those parts of the main and auxiliary wires which assume the curvature of the forming surface. Preferably the curved forming surface forms part of a cylinder of constant radius so that the curvature of the wires during compacting of the web therebetween also is constant. By driving the wires at the same angular velocity as they travel along the forming surface, relative movement between the wires during compacting of the web therebetween is reduced to a minimum.

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Inventors: Koski, Erkki (Jyvaskyla, SF)

Application Number: 453813
Filing Date: 1974-03-22
Publication_date: 1976-03-02
Assignee: Valmet Oy (SF)
Primary Class(es): 162/301 162/352
Other Classes:
US Patent Ref:

3236724	Feb, 1966	Wahlstrom	162/203.
3543834	Dec, 1970	Stuebe	162/300.
3565757	Feb, 1971	Jordansson	162/301.
3726758	Apr, 1973	Parker et al.	162/301.
3746613	Jul, 1973	Vauhkonen	162/301.

Other Refs:
Primary Examiner: Bashore, S. Leon
Assistant Examiner: Fisher, Richard V.
Attorney: Steinberg & Blake