Patent US4300982A successfully refreshed from Google Patents.
US4300982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wet press felt
Assignee: Albany International Corp
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Filing: 1976-01-02
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Granted: 1981-11-17
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Expires: 1996-01-02
Abstract
Abstract A papermakers press felt having a raised pattern of substantially incompressible islands which provide void area on the back of the felt for the free passage of water which has been squeezed from the felt by press rolls, allowing lateral as well as longitudinal flow and providing a degree of pumping action.
Inventors
- 👤 Eric R. Romanski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:54
CPC Classifications
D; D21; D21F; D21F7/00; D21F7/08; D21F7/083
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
96 words
Press means for use in a papermaking machine including in combination a water permeable endless base fabric for transporting paper sheet, an upper surface thereof for receiving in contact therewith paper sheet to be transported, a backside thereof, press rolls for receipt of said fabric, a plurality of discrete raised relatively incompressible island members in firm engagement with said backside, said island members maintaining intersecting channels to allow for lateral and longitudinal flow of water expressed from paper sheet on said upper surface upon the entrance of said fabric into the nip of said press rolls.
Claim 2
Dependent Claim
96 words
Press means for use in a papermaking machine including in combination a water permeable endless base fabric for transporting paper sheet, an upper surface thereof for receiving in contact therewith paper sheet to be transported, a backside thereof, press rolls for receipt of said fabric, a plurality of discrete raised relatively incompressible island members in firm engagement with said backside, said island members maintaining intersecting channels to allow for lateral and longitudinal flow of water expressed from paper sheet on said upper surface upon the entrance of said fabric into the nip of said press rolls.
Claim 3
Dependent Claim
23 words
A press fabric in accordance with claim 1 in which the island members are in the form of a stencilled pattern of dots.
Claim 4
Dependent Claim
24 words
A press fabric in accordance with claim 1 in which the island members are in the form of a stencilled pattern of ovalesque slots.
Claim 5
Dependent Claim
30 words
A press fabric in accordance with claim 1 in which the island members are in the form of a stencilled pattern of chevrons opening in the direction of felt travel.
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) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |