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:
Jul. 16, 1985
Filed:
Dec. 03, 1982
Kristian Lundstrom, Pirkkala, FI;
Tamfelt Oy AB, Tampere, FI;
Abstract
A press felt for conveying a paper web through a press section of a paper machine and comprising a support fabric (1) formed of a yarn structure and a fibre bat layer (2) formed of fibres and needled to the support fabric at least on one side thereof. The support fabric and the fibre bat layer are filled with a filling material (3) from one surface of the felt to the other so that the felt has an air permeability of less than 0.5 m.sup.3 of air/m.sup.2 of felt per minute under an air pressure of 100 Pa. The fibre fineness of the fibre bat is preferably at least 6 den. The felt formed by the fibre bat layer and the support fabric is preferably filled from the surface facing the paper with a rubber or resin emulsion so that the filled felt retains at least 45% of its original thickness under a compressive pressure of 10 MPa, in order to avoid blowing and rewetting at a conveying speed of up to 1000 m/min.