Paper making and fiber liberation – Apparatus – Running or indefinite length product forming and/or treating...
Patent
1977-03-11
1978-01-24
Fisher, Richard V.
Paper making and fiber liberation
Apparatus
Running or indefinite length product forming and/or treating...
162347, D21F 102, D21F 106
Patent
active
040702383
ABSTRACT:
Finely-mixed stock is produced in a headbox by delivering a multiplicity of separate stock streams at a relatively high velocity into passages defined between closely-spaced planar lamellae which extend parallel to the stock flow and oblique to a medial plane that lies axially and transversely of the fine-mixing stage that contains the lamellae. The stock flows at relatively low velocity in finely-mixed condition from the fine-mixing stage to a discharge nozzle, the axis of which lies at a substantial angle to the axis of the fine-mixing stage. The stock distribution and mixing section and the delivery nozzle of the headbox may be divided axially and transversely into two or more separate compartments for discharge of a jet composed of layers of the same or different stocks to form multi-ply webs. Different fiber orientations in different layers of such a multi-ply web are obtained by orienting the lamellae in the different chambers at substantially different oblique angles to the aforementioned axial-transverse medial plane of the fine-mixing stage.
REFERENCES:
patent: 3514372 (1970-05-01), Boyce et al.
patent: 3730831 (1973-05-01), Stevens
patent: 3791918 (1974-02-01), Koskimies et al.
patent: 3802966 (1974-04-01), Delekto et al.
patent: 3923593 (1975-12-01), Verseput
patent: 3945882 (1976-03-01), Egelhof et al.
Aktiebolaget Karlstads Mekaniska Werkstad
Fisher Richard V.
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