Paper making and fiber liberation – Apparatus – Measuring – testing – inspecting – indicating or illuminating
Patent
1978-12-07
1980-11-18
Fisher, Richard V.
Paper making and fiber liberation
Apparatus
Measuring, testing, inspecting, indicating or illuminating
162301, 162304, 162317, 162318, 162351, 162364, D21F 136, D21F 152
Patent
active
042343828
ABSTRACT:
A former for a paper machine: The paper machine includes a perforated forming cylinder and a suction device for drawing water inward through the perforations. An inner and an outer belt are wrapped around the forming cylinder. The outer belt meets the inner belt at the peripheral surface of the forming cylinder in a generally wedge-shaped inlet slot located at and upstream of the bottom of the forming cylinder. A pulp fiber suspension nozzle of a width that covers the axial length of the forming cylinder injects pulp into the inlet slot. A supporting device is provided at the inlet slot and includes a convexly curved surface, convexly curved around an axis generally parallel to the cylinder axis. The supporting device includes a concavely curved surface that follows the convexly curved surface downstream of the flow of pulp. A suction device communicates with the concavely curved surface beneath the outer belt. The outer belt rides over the convexly curved surface and down onto the concavely curved surface. The inner belt is a wire mesh. The outer belt is a felt strip.
REFERENCES:
patent: 2473269 (1969-06-01), Adams
patent: 3029871 (1962-04-01), Hornbostel
patent: 3455780 (1969-07-01), Hazard, Jr. et al.
patent: 3832282 (1974-08-01), Parker
patent: 3876498 (1975-04-01), Justus
patent: 3935061 (1976-01-01), Biornstad
patent: 3997390 (1976-12-01), Kankaanpaa
patent: 4124441 (1978-11-01), Nykopp
Fisher Richard V.
J. M. Voith GmbH
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