US 12,060,681 B2Granted

Seamed felt and use of the seamed felt in a tissue machine

AssigneeVoith Patent GmbH

InventorsSusanne Klaschka, Robert Eberhardt, Hubert Walkenhaus

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Abstract

A seamed felt for use in a machine for producing a tissue web has a single-layer or multilayer base structure and at least one layer of non-woven fibers. The base structure has a textile structure with MD threads which form seam loops at the two front edges of the base structure. The fabric can be made endless by connecting its front edges by way of a seam. The seam can be formed by interlocking the seam loops of the two front edges and introducing a push-in element. The MD threads wholly or predominantly have a diameter between 0.25 mm and 0.45 mm, in particular between 0.3 mm and 0.35 mm, and the thread density of the MD threads is more than 37%, in particular between 37% and 45%. There is also described a corresponding machine and a method for producing a tissue web.

Claims20

Dependent claims

A seamed felt for use in a machine for producing a tissue web, the seamed felt comprising:

at least one layer of nonwoven fibers;
a base structure being a woven material having machine direction (MD) threads and cross-machine direction (CD) threads, said base structure having two front edges with seam loops;
said woven material being a flatweave, said MD threads of the seamed felt being warp threads of a loom and said flatweave being made endless by connecting front ends thereof to form a two-layer structure by laying said flatweave on itself;
a seam rendering the seamed felt endless by connecting said front edges, said seam interlocking said seam loops of said front edges with a push-in element inserted therein;
at least 90% or all of said MD threads having a diameter of between 0.25 mm and 0.45 mm, and said MD threads having a thread density of more than 37%, wherein the thread density of said MD threads is determined by multiplying a number of threads per unit length by a diameter of said MD threads and setting a multiplication result in relation to the unit length.

2 more elements

Dependencies are inferred from the claim text.