US5098522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Papermaking belt and method of making the same using a textured casting surface
Assignee: Procter and Gamble Co
•
Filing: 1990-06-29
•
Granted: 1992-03-24
•
Expires: 2010-06-29
Abstract
Abstract A backside textured papermaking belt is disclosed which is comprised of a framework and a reinforcing structure. The framework has a first surface which defines the paper-contacting side of the belt, a second surface opposite the first surface, and conduits which extend between first and second surfaces of the belt. The first surface of the framework has a paper side network formed therein which defines the conduits. The second surface of the framework has a backside network with passageways that provide surface texture irregularities in the backside network. The papermaking belt is made by casting a photosensitive resinous material over and through the reinforcing structure while the reinforcing structure travels over a textured surface, and then exposing the photosensitive resinous material to light of an activating wavelength through a mask which has transparent and opaque regions. A process for making paper products is also disclosed which involves applying a fluid pressure differential from a vacuum source through the belt to a partially-formed embryonic web of papermaking fibers. The fibers in the embryonic web are deflected into the conduits of the papermaking belt by the vacuum pressure while the papermaking belt and the embryonic web travel over the vacuum source. Following the deflection, the paper web is impressed with the paper side network of the belt, and dried to form the final product.
Inventors
- 👤 John A. Smurkoski
- 👤 Gary L. Leggitt
- 👤 Gregory L. Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:51
CPC Classifications
D; D21; D21F; D21F11/00; B; B29; B29C; B29C35/00; B29C35/02; B29C35/08; B29C35/10; B29C43/00; B29C43/22; B29C43/222; B29C43/28; D21F11/006; D21F3/00; B29C35/0805; B29C2035/0827; B29K; B29K2105/00; B29K2105/0002; B29L; B29L2031/00; B29L2031/733; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24298; Y10T428/24306; Y10T428/24322; Y10T428/24331
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
217 words
A papermaking belt for use in a papermaking machine and having a paper-contacting side and a textured backside opposite said paper-contacting side, said papermaking belt comprising: a framework having a first surface defining said paper-contacting side of said belt, a second surface opposite said first surface and defining said textured backside of said belt, and conduits extending between said first surface and said second surface, said first surface having a paper side network formed therein defining said conduits, and said passageways second surface having a backside network with passageways, distinct from said conduits, that provide surface texture irregularities in said backside network to reduce buildup of paper fibers on said papermaking machine; a reinforcing structure positioned between said first surface and said second surface, said reinforcing structure having a paper-facing side, a machine-facing side opposite said paper-facing side, interstices, a reinforcing component, a projected open area defined by the projection of the areas defined by said interstices and a projected reinforcing area defined by the projection of said reinforcing component; and wherein all of said passageways are positioned outward from the plane defined by the machine-facing side of the reinforcing structure, and said backside surface has sufficient fluid passage capacity to permit at least about 1,800 standard cubic centimeters/minute of air to escape across said textured surface.
Claim 2
Dependent Claim
217 words
A papermaking belt for use in a papermaking machine and having a paper-contacting side and a textured backside opposite said paper-contacting side, said papermaking belt comprising: a framework having a first surface defining said paper-contacting side of said belt, a second surface opposite said first surface and defining said textured backside of said belt, and conduits extending between said first surface and said second surface, said first surface having a paper side network formed therein defining said conduits, and said passageways second surface having a backside network with passageways, distinct from said conduits, that provide surface texture irregularities in said backside network to reduce buildup of paper fibers on said papermaking machine; a reinforcing structure positioned between said first surface and said second surface, said reinforcing structure having a paper-facing side, a machine-facing side opposite said paper-facing side, interstices, a reinforcing component, a projected open area defined by the projection of the areas defined by said interstices and a projected reinforcing area defined by the projection of said reinforcing component; and wherein all of said passageways are positioned outward from the plane defined by the machine-facing side of the reinforcing structure, and said backside surface has sufficient fluid passage capacity to permit at least about 1,800 standard cubic centimeters/minute of air to escape across said textured surface.
Claim 3
Dependent Claim
18 words
The papermaking belt of claim 1 wherein said passageways are positioned in said backside network in a pattern.
Claim 4
Dependent Claim
16 words
The papermaking belt of claim 2 wherein said passageways are regularly spaced in said backside network.
Claim 5
Dependent Claim
21 words
The papermaking belt of claim 1 wherein said reinforcing structure has a projected open area of at least about 30 percent.
Claim 6
Dependent Claim
14 words
The papermaking belt of claim 4 wherein said reinforcing structure comprises a woven element.
Claim 7
Dependent Claim
15 words
The papermaking belt of claim 5 wherein said reinforcing structure comprises a multilayer woven element.
Claim 8
Dependent Claim
16 words
The papermaking belt of claims 1, 3, 4, or 6 wherein said framework comprises photosensitive resin.
Claim 9
Dependent Claim
17 words
The papermaking belt of claim 7 wherein said paper side network is macroscopically monoplanar, patterned and continuous.
Claim 10
Dependent Claim
58 words
The papermaking belt of claim 8 wherein said conduits have walls which extend between said first surface and said second surface, said walls defining both the interior portion of said conduits and the interior walls of said framework, said interior walls being tapered outwardly from said first surface of said framework to said second surface of said framework.
Claim 11
Dependent Claim
58 words
The papermaking belt of claim 9 wherein said interior walls are tapered so that the surface area of the paper side network is less than about 70 percent of the total surface area of said framework, and the surface area of the backside network is at least about 45 percent of the total surface area of said framework.
Claim 12
Dependent Claim
274 words
A papermaking belt for use in a papermaking machine and having a paper-contacting side and a textured backside opposite said paper-contacting side, said papermaking belt comprising: a framework having a first surface defining said paper-contacting side of said belt, a second surface opposite said first surface and defining at least a portion of said textured backside of said belt, and conduits extending between said first surface and said second surface, said first surface having a paper side network formed therein defining said conduits, and said second surface having a backside network with passageways, distinct from said conduits, that provide surface texture irregularities in said backside network to reduce buildup of paper fibers on papermaking machines; a reinforcing structure positioned between said first surface and at least a portion of said second surface, said reinforcing structure having a paper-facing side, a machine-facing side opposite said paper-facing side, interstices, a reinforcing component, a projected open area defined by the projection of the areas defined by said interstices and a projected reinforcing area defined by the projection of said reinforcing component; and wherein a multiplicity of said passageways are disposed inward of the plane defined by the machine-facing side of said reinforcing structure in said interstices so that a portion of the projected area of the passageways corresponds with a portion of the projected open area of said reinforcing structure and a multiplicity of said passageways are positioned outward from the plane defined by the machine-facing side of the reinforcing structure, and said backside surface has sufficient fluid passage capacity to permit at least about 1,800 standard cubic centimeters/minute of air to escape across said textured surface.
Claim 13
Dependent Claim
274 words
A papermaking belt for use in a papermaking machine and having a paper-contacting side and a textured backside opposite said paper-contacting side, said papermaking belt comprising: a framework having a first surface defining said paper-contacting side of said belt, a second surface opposite said first surface and defining at least a portion of said textured backside of said belt, and conduits extending between said first surface and said second surface, said first surface having a paper side network formed therein defining said conduits, and said second surface having a backside network with passageways, distinct from said conduits, that provide surface texture irregularities in said backside network to reduce buildup of paper fibers on papermaking machines; a reinforcing structure positioned between said first surface and at least a portion of said second surface, said reinforcing structure having a paper-facing side, a machine-facing side opposite said paper-facing side, interstices, a reinforcing component, a projected open area defined by the projection of the areas defined by said interstices and a projected reinforcing area defined by the projection of said reinforcing component; and wherein a multiplicity of said passageways are disposed inward of the plane defined by the machine-facing side of said reinforcing structure in said interstices so that a portion of the projected area of the passageways corresponds with a portion of the projected open area of said reinforcing structure and a multiplicity of said passageways are positioned outward from the plane defined by the machine-facing side of the reinforcing structure, and said backside surface has sufficient fluid passage capacity to permit at least about 1,800 standard cubic centimeters/minute of air to escape across said textured surface.
Claim 14
Dependent Claim
18 words
The papermaking belt of claim 11 wherein said passageways are positioned in said backside network in a pattern.
Claim 15
Dependent Claim
16 words
The papermaking belt of claim 12 wherein said passageways are regularly spaced in said backside network.
Claim 16
Dependent Claim
21 words
The papermaking belt of claim 11 wherein said reinforcing structure has a projected open area of at least about 30 percent.
Claim 17
Dependent Claim
14 words
The papermaking belt of claim 14 wherein said reinforcing structure comprises a woven element.
Claim 18
Dependent Claim
15 words
The papermaking belt of claim 15 wherein said reinforcing structure comprises a multilayer woven element.
Claim 19
Dependent Claim
16 words
The papermaking belt of claims 11, 13, 14, or 16 wherein said framework comprises photosensitive resin.
Claim 20
Dependent Claim
17 words
The papermaking belt of claim 17 wherein said paper side network is macroscopically monoplanar, patterned and continuous.
Claim 21
Dependent Claim
58 words
The papermaking belt of claim 18 wherein said conduits have walls which extend between said first surface and said second surface, said walls defining both the interior portion of said conduits and the interior walls of said framework, said interior walls being tapered outwardly from said first surface of said framework to said second surface of said framework.
Claim 22
Dependent Claim
57 words
The papermaking belt of claim 19 wherein said interior walls tapered so that the surface area of the paper side network is less than about 70 percent of the total surface area of said framework, and the surface area of the backside network is at least about 45 percent of the total surface area of said framework.
References Cited (Backward Citations)
US1876432A
Cited
US1033992A
Cited
US1454323A
Cited
US1813587A
Cited
US2245014A
Cited
US2271058A
Cited
US2556504A
Cited
US2480749A
Cited
US2862251A
Cited
US2860576A
Cited
US3061505A
Cited
US3121660A
Cited
US3301746A
Cited
US3322617A
Cited
USRE28459E
Cited
US3438504A
Cited
US3549742A
Cited
US3658620A
Cited
US3713935A
Cited
US3617442A
Cited
US3878019A
Cited
US3974025A
Cited
US4070235A
Cited
US4054635A
Cited
US4042654A
Cited
US3994771A
Cited
US4036684A
Cited
JPS5351253A
Cited
US4291116A
Cited
US4172910A
Cited
US4251928A
Cited
JPS5549230A
Cited
US4239065A
Cited
US4191609A
Cited
JPS5667226A
Cited
US4283454A
Cited
US4446187A
Cited
JPS5731535A
Cited
US4359069A
Cited
US4507173A
Cited
US4340057A
Cited
US4450341A
Cited
US4382987A
Cited
US4529480A
Cited
US4528239A
Cited
US4514345A
Cited
US4637859A
Cited
US4728530A
Cited
US4759391A
Cited
US4995429A
Cited
US4752519A
Cited
US4921750A
Cited
EP0349779A2
Cited
US4981745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-24 | 1995-09-23 | 1996-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-24 | 1999-09-23 | 2000-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-24 | 2003-09-23 | 2004-03-24 | $7700.00 | Window Closed / Lapsed |