Arrangement for feeding stock to a headbox in a papermaking mach

Details Arrangement for feeding stock to a headbox in a papermaking mach Arrangement for feeding stock to a headbox in a papermaking mach

1998-12-28

2000-02-29

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

Running or indefinite length product forming and/or treating...

162258, D21F 108

Patent

active

060305002

ABSTRACT:
An arrangement for feeding stock to a headbox in a papermaking machine which comprises at least one stock header with an inlet for receiving stock into the header and a plurality of stock header outlets permitting stock to leave the header. For each stock header outlet there is a stock conduit downstream of the stock header outlet permitting stock to pass from the stock header outlet, through the conduit to the inlet of the headbox. The arrangement includes a dilution header for feeding a diluent such as water to a plurality of stock conduits. The dilution header has an inlet for receiving a diluent not the dilution header and a plurality of outlets permitting the diluent to leave the dilution header. For each dilution header outlet, there is a diluent conduit permitting the passage of a diluent from the dilution header into a stock conduit. According to the invention, the diluent is fed into a stock conduit at a location immediately downstream of a stock header outlet and the stock header together with the stock header outlets is designated such that the velocity of the stock flowing through the stock header is substantially equal to the velocity of the stock in an upstream end of the stock conduits.

REFERENCES:
patent: 3878039 (1975-04-01), Descary et al.
patent: 4897158 (1990-01-01), Weisshuhn et al.
patent: 5124002 (1992-06-01), Kade
patent: 5147509 (1992-09-01), Kuragasaki et al.
patent: 5196091 (1993-03-01), Hergert
patent: 5316383 (1994-05-01), Begemann et al.
patent: 5626722 (1997-05-01), Huovila
patent: 5688374 (1997-11-01), Begemann et al.
patent: 5709777 (1998-01-01), Begemann et al.

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