Abstract: A press shoe for a shoe press with extended nip, said press shoe is of combined hydrostatic and hydrodynamic type and has a plurality of hydrostatic pressure pockets, each of which is preceded by a leading land surface and followed by a trailing land surface and into which lubricant is supplied under pressure. Each pressure pocket has a first pocket zone in which a hydrodynamic pressure shall be created and which comprises a bottom surface located at gradually decreasing depth from the concave surface portion of the press shoe seen in the direction of rotation of the belt member, said depth being zero at the trailing end of the pressure pocket. The bottom surface forms an angle .alpha. of from 0.degree. to about 2.degree. with a tangent to the concave surface portion of the press shoe at the trailing end of the pressure pocket. Further the first pocket zone is preceded by a second pocket zone comprising a plane bottom surface forming an angle .beta. of from 0.degree. to about .+-.10.degree.

Abstract: The press roll cooperates with a counter roll to form a press with a long nip for paper or board machines. The press roll has two end walls; a flexible jacket secured to the end walls; and support members for the end walls. The end walls have bearings for permitting rotation of the jacket and the end walls in relation to the support members; and a press shoe intended together with the counter roll to form a pressing zone. Attachment assemblies each have a circular clamping member, which includes a wedge body, and a circular groove disposed on the inside of the end wall to receive the edge portions of the jacket and the wedge body, the groove and wedge body being provided with cooperating wedge forming surfaces. Further, the clamping member includes bolts for pulling the wedge body into the groove and retaining it therein in order to clamp the edge portions of the jacket by means of wedge action, against the end wall.

Abstract: In order to increase the life of a flexible jacket in a shoe type press roll having a flexible jacket (11), end wall displacing element (28) and jacket stretching element (27), the end wall displacing element (28) are designed to permit a setting of an arbitrary operating position for one roll end wall (18) between two end positions on one of the two stub shafts (13) of the roll, and the jacket stretching element (27) are designed to maintain the stretching force substantially constant, whereby the other roll end wall (22) will be self-positioning and will automatically follow each axial displacment of said one roll end wall (18).

Abstract: A press with extended nip for paper and board machines includes a support element acting as counter member; a pressure element disposed opposite the support element, designed to be secured to a stand, and including a press shoe which, together with the support element, forms a pressing zone with extended nip; at least one endless movable fluid-impervious belt, being arranged to pass through the pressing zone in sliding contact with the press shoe; and at least one endless liquid-absorbing felt, arranged to pass through the pressing zone together with a fiber web to be dewatered.

Abstract: A press with extended nip for paper and board machines includes a support element acting as a counter member; a pressure element disposed opposite the support element and including a press shoe and a carrying element carrying the press shoe and designed to be secured to a stand, the press shoe, together with the support element, forming a pressing zone with extended nip; at least one endless movable fluid-impervious belt, being arranged to pass through the pressing zone in sliding contact with the press shoe; and at least one endless, liquid-absorbing felt, arranged to pass through the pressing zone together with a fiber web to be dewatered.