Papermakers felt with improved drainage
AssigneeAscoe Felts, Inc.
InventorsMarcel Dufour, Ecrire Pascaud
Life of this patent
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Abstract
A papermaker's felt having improved water drainage properties for use in the press or dewatering section of papermaking machinery. The felt is formed by a base fabric comprised of machine and cross machine direction yarns in a plurality of large cable yarns which are secured to the base fabric by selected interweavings with the cross machine direction yarns. A felt batt is needled to the paper carrying surface of the felt and a second batt is needled to the machine or cable side of the fabric. The cables are maintained in a secured position generally spaced between pairs of machine direction yarns in the base fabric by means of the interweaving with the cross direction yarns.
Claims21
A papermaker's felt comprising:
- (a) a base fabric, said base fabric further comprising:
- (i) at least first and second machine direction yard systems, said second machine direction yarn system comprised of cable yarns which are fewer in number and greater in diameter than the yarns of said first machine direction yarn system and
- (ii) at least one a cross machine yarn system interwoven with said first machine direction yarn system in a selected repeat pattern, said cross machine yarn system having selected yarns within said repeat pattern which interweave with said cable yarns, each of said selected yarns to interweave with one cable yarn within said repeat pattern;
- (b) a first batt needled to said base fabric;
- and
- (c) a second batt needled to said base fabric adjacent to said cable yarns.
A papermaker's felt having improved drainage, said felt comprising:
- a base fabric, said fabric further comprising
- (i) first machine direction yarn system having an even number of yarns therein;
- (ii) second machine direction yarn system having cable yarns which are half in number and greater in diameter than the yarns of said first machine direction yarn system;
- and
- (iii) at least one cross machine direction yarn system interwoven with said first machine direction yarn system in a selected repeat pattern, said cross machine yarn system having selected yarns within said repeat pattern which interweave with said cable yarns, each of said selected yarns interwoven with one cable yarn within said repeat pattern and maintaining said one cable yarn between a respective pair of yarns of said first machine direction yarn system.
A papermaker's felt comprising:
- a base fabric, including
- (i) a first machine direction yarn system;
- (ii) a second machine direction yarn system comprised of cable yarns which are fewer in number and greater in diameter than the yarns of said first machine direction yarn system thereby defining a selected ratio therebetween;
- (iii) a cross machine yarn system interwoven with said first machine direction yarn system defining a selected repeat pattern;
- and
- (iv) selected yarns of said cross machine yarn system also interwoven with said second machine direction system defining a selected sub-repeat pattern within said repeat pattern such that the ratio between the number of yarns in said repeat pattern and the number of yarns also in said sub-repeat patterns equals said yarn ratio between said first and second machine direction yarn systems.
Dependencies are inferred from the claim text.