Means in the vat section of a vat machine

Details Means in the vat section of a vat machine Means in the vat section of a vat machine

D - Textiles, Paper

21

F

92/26

D21F 1/00 (2006.01) D21F 1/04 (2006.01) D21F 9/00 (2006.01)

Patent

CA 1236323

A VAT PAPER MACHINE Abstract of the Disclosure A vat paper machine is disclosed, said machine including a cylinder-vat unit having a rotatable cylinder mold, a vat and a headbox for providing a continuous supply of stock to the vat. The vat is arranged upstream of the cylinder mold in such a manner that the wire-covered cylinder mold is brought into contact with stock in the vat to form a first web by draining water from the stock through the wire-covered surface of the mold. An outer wire is also provided which runs in a loop over a breast roll, through the vat along its bottom wall and then over and around a portion of the circumference of the cylinder mold. The portion of the bottom wall of the vat which is located between the breast roll and the cylinder mold includes a platform supporting the outer wire. The plat- form is provided with slit means that form one or more drainage passages which serve to form a second web on the outer wire. The slit means is arranged at a predetermined distance from a nip located downstream and defined by the outer wire and the cylinder mold so as to avoid detrimental stock flows at the nip which retard formation of the web. The second web is couched with the first web to form a uni- tary paper web.

483384

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