US5851353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for wet web molding and drying
Assignee: Kimberly Clark Worldwide Inc
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Filing: 1997-04-14
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Granted: 1998-12-22
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Expires: 2017-04-14
Abstract
Abstract A method for can drying wet webs for tissue products to preserve web bulk includes, in one embodiment, restraining a partially dewatered wet web between a pair of sheet molding fabrics. The restrained wet web is processed over a plurality of can dryers to dry the wet web, for example from a consistency of at least about 40 percent to a consistency of at least about 70 percent. The sheet molding fabrics in this embodiment protect the wet web from direct contact with the can dryers and impart an impression in the web. A can drying assembly and tissue machine for accomplishing the method are also disclosed.
Inventors
- 👤 Mark Wilson Fiscus
- 👤 Thomas Garrett Neal, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:08
CPC Classifications
B; B31; B31F; B31F1/00; B31F1/12; B31F1/126
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
81 words
A method of making a tissue sheet, comprising the steps of: depositing an aqueous suspension of papermaking fibers onto an endless forming fabric to form a wet web; partially dewatering the wet web; restraining the partially dewatered wet web between a pair of sheet molding fabrics; and processing the restrained wet web over a plurality of can dryers to dry the wet web from a consistency of at least about 40 percent to a consistency of at least about 70 percent.
Claim 2
Independent Claim
81 words
A method of making a tissue sheet, comprising the steps of: depositing an aqueous suspension of papermaking fibers onto an endless forming fabric to form a wet web; partially dewatering the wet web; restraining the partially dewatered wet web between a pair of sheet molding fabrics; and processing the restrained wet web over a plurality of can dryers to dry the wet web from a consistency of at least about 40 percent to a consistency of at least about 70 percent.
Claim 3
Independent Claim
118 words
A method of making a tissue sheet, comprising the steps of: depositing an aqueous suspension of papermaking fibers onto an endless forming fabric to form a wet web; transferring the wet web to an air and liquid permeable perforated belt arranged to form an endless loop; transferring the wet web to the surface of a cylindrical drying device; creping the wet web from the cylindrical drying device when the wet web has a consistency of at least about 40 percent; restraining the creped wet web between a pair of sheet molding fabrics; and processing the restrained wet web over a plurality of can dryers to dry the wet web to a consistency of at least about 70 percent.
Claim 4
Independent Claim
118 words
A method of making a tissue sheet, comprising the steps of: depositing an aqueous suspension of papermaking fibers onto an endless forming fabric to form a wet web; transferring the wet web to an air and liquid permeable perforated belt arranged to form an endless loop; transferring the wet web to the surface of a cylindrical drying device; creping the wet web from the cylindrical drying device when the wet web has a consistency of at least about 40 percent; restraining the creped wet web between a pair of sheet molding fabrics; and processing the restrained wet web over a plurality of can dryers to dry the wet web to a consistency of at least about 70 percent.
Claim 5
Dependent Claim
44 words
The method of claim 1 or 2, wherein processing the restrained wet web comprises passing the restrained wet web through an impressioning section of a can drying assembly, the wet web entering the impressioning section with a consistency of at least about 45 percent.
Claim 6
Dependent Claim
24 words
The method of claim 3, wherein the wet web enters the impressioning section with a consistency of from about 45 to about 65 percent.
Claim 7
Dependent Claim
24 words
The method of claim 3, wherein the wet web enters the impressioning section with a consistency of from about 50 to about 60 percent.
Claim 8
Dependent Claim
53 words
The method of claim 1 or 2, wherein processing the restrained wet web comprises passing the restrained wet web through an impressioning section of a can drying assembly, the wet web exiting the impressioning section and being released from between the sheet molding fabrics with a consistency of at least about 75 percent.
Claim 9
Dependent Claim
33 words
The method of claim 6, wherein the wet web exits the impressioning section and is released from between the sheet molding fabrics with a consistency of from about 75 to about 85 percent.
Claim 10
Dependent Claim
62 words
The method of claim 1 or 2, wherein processing the restrained wet web comprises passing the restrained wet web through a can drying assembly having an impressioning section and a final drying section, the wet web being restrained between the sheet molding fabrics through the impressioning section and being released from between the sheet molding fabrics prior to the final drying section.
Claim 11
Dependent Claim
10 words
The tissue sheet made by the method of claim 1.
Claim 12
Dependent Claim
10 words
The tissue sheet made by the method of claim 2.
Claim 13
Independent Claim
149 words
A method of making a tissue sheet, comprising the steps of: depositing an aqueous suspension of papermaking fibers onto an endless forming fabric to form a wet web; transferring the wet web to an air and liquid permeable perforated belt arranged to form an endless loop; transferring the wet web to the surface of a cylindrical drying device; creping the wet web from the cylindrical drying device when the wet web has a consistency of at least about 40 percent; transferring the creped wet web to a sheet molding fabric; processing the wet web while disposed on the sheet molding fabric over a plurality of can dryers to dry the wet web to a consistency of at least about 70 percent, the wet web and sheet molding fabric alternately being directly in contact with the plurality of can dryers; and transferring the wet web to a final drying section.
Claim 14
Independent Claim
149 words
A method of making a tissue sheet, comprising the steps of: depositing an aqueous suspension of papermaking fibers onto an endless forming fabric to form a wet web; transferring the wet web to an air and liquid permeable perforated belt arranged to form an endless loop; transferring the wet web to the surface of a cylindrical drying device; creping the wet web from the cylindrical drying device when the wet web has a consistency of at least about 40 percent; transferring the creped wet web to a sheet molding fabric; processing the wet web while disposed on the sheet molding fabric over a plurality of can dryers to dry the wet web to a consistency of at least about 70 percent, the wet web and sheet molding fabric alternately being directly in contact with the plurality of can dryers; and transferring the wet web to a final drying section.
References Cited (Backward Citations)
US1979819A
Cited
US4196045A
Cited
US4894118A
Cited
US5230776A
Cited
US5137600A
Cited
US5336373A
Cited
EP0604824A1
Cited
US5494554A
Cited
EP0617164A1
Cited
US5411636A
Cited
US5492598A
Cited
US5429686A
Cited
EP0677612A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-12-21 | 2002-06-22 | 2002-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-12-21 | 2006-06-22 | 2006-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-12-21 | 2010-06-22 | 2010-12-22 | $7700.00 | Window Closed / Lapsed |