US4601785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Felt comprising a loop seam for use in the press section of papermaking machines and a method of manufacturing such felts
Assignee: Albany International Corp
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Filing: 1983-10-27
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Granted: 1986-07-22
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Expires: 2003-10-27
Abstract
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.
Inventors
- 👤 Roland E. Lilja
- 👤 Sven B. Nilsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:33
CPC Classifications
D; D21; D21F; D21F7/00; D21F7/08; D21F7/10; Y; Y10; Y10S; Y10S162/00; Y10S162/90
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
176 words
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.
Claim 2
Dependent Claim
176 words
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.
Claim 3
Dependent Claim
15 words
The felt of claim 1 wherein said batt is attached to said base by needling.
Claim 4
Dependent Claim
16 words
The felt of claim 1 wherein said first portion is attached to said base by needling.
Claim 5
Dependent Claim
18 words
The felt of claim 1 wherein said seam is provided by loops formed by said machine direction threads.
Claim 6
Dependent Claim
16 words
The felt of claim 1 wherein said machine direction threads consist of at least two layers.
Claim 7
Independent Claim
118 words
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.
Claim 8
Independent Claim
118 words
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.
Claim 9
Dependent Claim
15 words
The method of claim 6 whereby said batt is attached to said base by needling.
Claim 10
Dependent Claim
18 words
The method of claim 6 wherein said flap is attached to said base after the felt is installed.
Claim 11
Dependent Claim
15 words
The method of claim 8 wherein said flap is attached to the base by needling.
Claim 12
Dependent Claim
15 words
The method of claim 8 wherein said flap is attached to the base by gluing.
Claim 13
Dependent Claim
211 words
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.
Claim 14
Dependent Claim
211 words
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.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-21 | 1990-01-20 | 1990-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-21 | 1994-01-20 | 1994-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-21 | 1998-01-20 | 1998-07-22 | $7700.00 | Window Closed / Lapsed |