The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 29, 2000
Filed:
Dec. 28, 1998
N Ulf Haraldsson, Karlstad, SE;
Jyrki M Huovila, Muurame, FI;
Ingvar B Klerelid, Karlstad, SE;
Louise M Tornefalk, Karlstad, SE;
Valmet-Karlstad AB, Karlstad, SE;
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.