Papermaking machine employing an impermeable transfer belt,...

Paper making and fiber liberation – Apparatus – Running or indefinite length product forming and/or treating...

Reexamination Certificate

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C162S203000, C162S361000, C162S358400

Reexamination Certificate

active

07811418

ABSTRACT:
A papermaking machine for making paper includes a forming section, a press section, and a drying section. The paper web is pressed between two press members while enclosed between a press felt and a transfer belt having non-uniformly distributed microscopic depressions in its surface, the web following the transfer belt from the press to a transfer point at which the web is transferred via a suction transfer device onto a structuring fabric, the web then being dried on a drying cylinder. The transfer point is spaced a distance D from the press nip selected based on machine speed, a basis weight of the web, and the surface characteristics of the transfer belt, such that within the distance D a thin water film between the web and the transfer belt at least partially dissipates to allow the web to be separated from the transfer belt.

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patent: 4500588 (1985-02-01), Lundstrom
patent: 4529643 (1985-07-01), Lundstrom
patent: 4976821 (1990-12-01), Laapotti
patent: 5002638 (1991-03-01), Gulya et al.
patent: 5298124 (1994-03-01), Eklund et al.
patent: 6287426 (2001-09-01), Edwards et al.
patent: 6319365 (2001-11-01), Inoue
patent: 6531033 (2003-03-01), Kawashima
patent: 6547924 (2003-04-01), Klerelid et al.
patent: 6743339 (2004-06-01), Nilsson et al.

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