Abstract: A vat paper machine is disclosed, the 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 has a special wall structure and is arranged upstream of the cylinder mold in such a manner that the wire gauze covered cylinder mold is brought into contact with stock in the vat to form a web by draining water from the stock through the wire gauze covered surface of the mold. An outer wire is also provided which runs in a loop over a breast roll, through the vat at the wall structure thereof and then over and around a portion of the circumference of the cylinder mold. The wall structure comprises an endless liquid-impervious belt forming an endless loop located on the inner side of the loop defined by the outer wire.

Abstract: 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 platform is provided with slit means that form one or more drainage passages which serve to form a second web on the outer wire.

Abstract: The disclosure concerns a former for use in a paper making machine, or the like, for producing a web of fibrous suspension on a wire. The former includes a sliding surface, past which a tensioned wire is moved. A duct for fibrous suspension opens on the sliding surface. The sliding surface on the two sides of the duct is shaped so that downstream of the duct in the direction of movement of the wire, a wedge shaped slot is defined between the wire and the sliding surface in which the suspension is received and from which it is dewatered.