Felt comprising a loop seam for use in the press section of papermaking machines and a method of manufacturing such felts
AssigneeAlbany International Corp.
InventorsRoland E. Lilja, Sven B. Nilsson
Life of this patent
Estimating the term…
Abstract
A felt for use in the press section of papermaking machines. The felt consists of a woven base preferably of two layers of threads extending in the machine direction of the felt and cross-machine direction threads interconnect the machine-direction threads, the woven base having a batt needed onto at least one of its faces. The felt is manufactured to be installed in flat form but after its installation in the machine its ends are joined together to form an endless cloth with the aid of a seam known per se. A flap of the batt or batts is arranged to cover the seam area. The invention also concerns a method of manufacturing and installing the felt in the press section of papermaking machines.
Claims11
A felt for use in the press section of a papermaking machine comprising:
- a base having machine-direction and cross-machine direction threads and having first and second base ends;
- a seam for selectively joining and releasing said first and second base ends;
- and batt having first and second batt ends, said batt further having first and second longitudinal portions corresponding to the machine direction, said first longitudinal portion being attached to said base with said first batt end spaced at a predetermined distance away from said first base end to leave a section of the base exposed and said second longitudinal portion corresponding to the machine direction being a continuation of said first longitudinal portion and extending past said second base end to form a flap;
- whereby the felt may be installed on said papermachine press section by the opening of said seam to release said two base ends and position said felt in an operational configuration enabling the closing of said seam with said flap extending over said closed seam and said section of exposed base.
A method of making a felt for use in the press section of a papermaking machine comprising:
- providing a woven base having first and second base ends;
- joining said first and second base ends by a releasable seam;
- attaching a batt continuously around said base;
- cutting said batt along a first line parallel with and spaced in the machine direction away from said seam;
- and
- loosening said batt away from said first line to a second line on the opposite side of said seam to form a flap;
- whereby the felt may be installed on said papermachine press section by opening the seam, positioning the felt in an operational configuration on the press section, and reclosing said seam.
A press section of a papermaking machine including in combination, a stretch roll, guide roll means, a felt passing thereover, and first and second press rolls engaging said felt on either side thereof, said felt comprising:
- a felt for use in the press section of a papermaking machine comprising a base having machine-direction and cross-machine direction threads and having first and second base ends;
- a seam for selectively joining and releasing said first and second base ends;
- and batt having first and second batt ends, said batt further having first and second longitudinal portions corresponding to the machine direction, said first longitudinal portion being attached to said base with said first batt end spaced at a predetermined distance away from said first base end to leave a section of the base exposed and said second longitudinal portion corresponding to the machine direction being a continuation of said first longitudinal portion and extending past said second end to form a flap;
- whereby the felt may be installed on said papermachine press section by the opening of said seam to release said two base ends and position said felt in an operational configuration enabling the closing of said seam with said flap extending over said closed seam and said section of exposed base.
Dependencies are inferred from the claim text.