US4737241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a papermaker's felt
Assignee: Appleton Mills
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Filing: 1987-02-20
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Granted: 1988-04-12
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Expires: 2007-02-20
Abstract
Abstract A method of making a papermaker's felt which includes the steps of forming a pin seam fabric having interdigitated loops at the ends of the fabric joined by a pin. A batt of fibrous material is needled into at least one face of the fabric and across the pin seam joint. When the felt is to be installed on the papermaking machine, the pin is removed and the felt is bent back on itself at the joint to bring the portions of the batt adjacent the joint into contiguous or contacting relation and cause the loops to separate. The batt is then cut along a line extending through the separated loops to provide a flat or opened felt which can then be installed on the papermaking machine. After installation, the loops are interdigitated and the pin is reinserted through the loops to provide the endless felt construction.
Inventors
- 👤 Thomas G. Gulya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:27
CPC Classifications
D; D21; D21F; D21F7/00; D21F7/08; D21F7/10; D21F7/083; Y; Y10; Y10S; Y10S162/00; Y10S162/90; Y10S162/904
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
150 words
A method of making a papermaker's felt, comprising the steps of forming a pin seam fabric having interdigitated loops at the ends of the fabric joined by a pin to provide a pin seam joint, needling a batt of fibrous material onto a face of said fabric and across said joint, removing said pin from said loops, bending the fabric back on itself at said joint to bring portions of the batt located on either side of said joint into substantially contiguous relation and cause said loops to separate, cutting the batt along a line extending through the separated loops to enable said felt to be opened to a flat condition, subsequently installing the felt in a press section of a papermaking machine, and thereafter interdigitating the loops and reinserting the pin in said interdigitated loops to position the cut line in said batt in direct alignment with said pin.
Claim 2
Independent Claim
150 words
A method of making a papermaker's felt, comprising the steps of forming a pin seam fabric having interdigitated loops at the ends of the fabric joined by a pin to provide a pin seam joint, needling a batt of fibrous material onto a face of said fabric and across said joint, removing said pin from said loops, bending the fabric back on itself at said joint to bring portions of the batt located on either side of said joint into substantially contiguous relation and cause said loops to separate, cutting the batt along a line extending through the separated loops to enable said felt to be opened to a flat condition, subsequently installing the felt in a press section of a papermaking machine, and thereafter interdigitating the loops and reinserting the pin in said interdigitated loops to position the cut line in said batt in direct alignment with said pin.
Claim 3
Dependent Claim
20 words
The method of claim 1, wherein the step of forming said fabric comprises interweaving machine direction and cross direction yarns.
Claim 4
Dependent Claim
141 words
In a method of making a papermaker's felt, the steps of forming a pin seam fabric having interdigitated loops at the ends of the fabric joined by a pin to provide a pin seam joint, needling a batt of fibrous material onto a first face of said fabric, bending the fabric at said joint to bring portions of said batt located on either side of said joint into flatwise relation and cause said loops to separate into spaced relation, cutting the batt along a line through the space between said separated loops to enable said felt to be opened to a flat condition, installing the felt in a press section of a papermaking machine and interdigitating the loops, and reinserting the pin into said interdigitated loops to position the cut line in said batt in substantially direct alignment with said pin.
Claim 5
Dependent Claim
141 words
In a method of making a papermaker's felt, the steps of forming a pin seam fabric having interdigitated loops at the ends of the fabric joined by a pin to provide a pin seam joint, needling a batt of fibrous material onto a first face of said fabric, bending the fabric at said joint to bring portions of said batt located on either side of said joint into flatwise relation and cause said loops to separate into spaced relation, cutting the batt along a line through the space between said separated loops to enable said felt to be opened to a flat condition, installing the felt in a press section of a papermaking machine and interdigitating the loops, and reinserting the pin into said interdigitated loops to position the cut line in said batt in substantially direct alignment with said pin.
Claim 6
Dependent Claim
31 words
The method of claim 3, wherein said step of cutting said batt comprises cutting along a line at an actue angle with respect to a plane extending through said flatwise portions.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-12 | 1991-10-12 | 1992-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-12 | 1995-10-12 | 1996-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-12 | 1999-10-12 | 2000-04-12 | $7700.00 | Window Closed / Lapsed |