US3821068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soft,absorbent,fibrous,sheet material formed by avoiding mechanical compression of the fiber furnish until the sheet is at least 80% dry
Assignee: Kimberly Clark Tissue Co
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Filing: 1972-10-17
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Granted: 1974-06-28
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Expires: 1992-10-17
Abstract
Abstract A soft, absorbent, creped paper web formed by deposition from an aqueous slurry of principally lignocellulosic fibers and dried to at least 80 percent fiber consistency or dryness without being subjected to mechanical compression of the web to substantially reduce formation of papermaking bonds which would form upon compression of the web while wet. The resultant uniform density web is adhered to a dryer through the use of a creping adhesive (which does not add significant strength to the web) and is creped therefrom. The fibers in the web are bonded together almost exclusively by conventional papermaking bonds formed upon drying of the web. The uniform density web product has a dry basis weight of from about 10 to 30 lbs/ 2,880 feet2, a TEA-tostiffness ratio greater than 0.5 X 10 4, and an average calculated density throughout it thickness under no load of less than 0.3 grams per cubic centimeter.
Inventors
- 👤 D Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:02
CPC Classifications
D; D21; D21F; D21F11/00; D21F11/14; D21F9/00; D21F9/02; D21H; D21H21/00; D21H21/14; D21H21/146; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24446; Y10T428/24455
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
124 words
Method for making a soft, absorbent, creped, sanitary paper product, comprising the steps of: forming a web of principally lignocellulosic fibers by deposition of an aqueous slurry of the fibers onto a foraminous surface; removing water from the web without mechanical compression until the web is at least 80 percent dry to form a web having uniform density; bonding the fibers together almost exclusively by papermaking bonds formed upon drying of the web; applying a creping adhesive to one surface of the web, the adhesive not adding significant strength to the web; adhering the web to a creping surface; drying the web on the creping surface to about 95 percent dry; and removing the dried web from the creping surface with a creping blade.
Claim 2
Dependent Claim
124 words
Method for making a soft, absorbent, creped, sanitary paper product, comprising the steps of: forming a web of principally lignocellulosic fibers by deposition of an aqueous slurry of the fibers onto a foraminous surface; removing water from the web without mechanical compression until the web is at least 80 percent dry to form a web having uniform density; bonding the fibers together almost exclusively by papermaking bonds formed upon drying of the web; applying a creping adhesive to one surface of the web, the adhesive not adding significant strength to the web; adhering the web to a creping surface; drying the web on the creping surface to about 95 percent dry; and removing the dried web from the creping surface with a creping blade.
Claim 3
Dependent Claim
24 words
Method according to claim 1, wherein the web is at least 90 percent dry prior to application of the creping adhesive to the web.
Claim 4
Dependent Claim
34 words
Method according to claim 1, wherein application of the creping adhesive causes the web to be rewet to a degree which is no wetter than 70 percent dry when adhered to the creping surface.
Claim 5
Dependent Claim
20 words
Method according to claim 3, wherein the web is at least 75 percent dry when adhered to the creping surface.
Claim 6
Dependent Claim
20 words
Method according to claim 4, wherein the web is at least 80 percent dry when adhered to the creping surface.
Claim 7
Dependent Claim
22 words
Method according to claim 5, wherein the web has a dry basis weight of from about 15 to about 22 lbs/2,880 feet2.
Claim 8
Dependent Claim
22 words
Method according to claim 4, wherein the web has a dry basis weight of from about 10 to about 30 lbs/2,880 feet2.
Claim 9
Dependent Claim
18 words
Method according to claim 1, wherein water is removed from the web by passing air through the web.
Claim 10
Dependent Claim
25 words
Method according to claim 1, wherein the fibers are treated with a debonding agent before drying of the web to reduce their inter-fiber bonding capacity.
Claim 11
Dependent Claim
81 words
Method for making a soft, absorbent, creped, sanitary paper product, comprising the steps of: forming a web of principally lignocellulosic fibers by deposition of an aqueous slurry of the fibers onto a foraminous surface; removing water from the web without mechanical compression while the web is less than 80 percent dry to form a web having uniform density; bonding the fibers together almost exclusively by papermaking bonds formed upon drying of the web; and creping the web from a creping surface.
Claim 12
Dependent Claim
81 words
Method for making a soft, absorbent, creped, sanitary paper product, comprising the steps of: forming a web of principally lignocellulosic fibers by deposition of an aqueous slurry of the fibers onto a foraminous surface; removing water from the web without mechanical compression while the web is less than 80 percent dry to form a web having uniform density; bonding the fibers together almost exclusively by papermaking bonds formed upon drying of the web; and creping the web from a creping surface.
Claim 13
Dependent Claim
78 words
A soft, absorbent, creped, sanitary paper web product formed by deposition from an aqueous slurry, the web comprising: randomly arranged, contacting lignocellulosic fibers bonded together almost exclusively by papermaking bonds; the web being of uniform density and having a dry basis weight of from about 10 to 30 lbs/2,880 feet2, a TEA-to-stiffness ratio greater than 0.5 X 10 4 and an average calculated density throughout its thickness under no load of less than 0.3 grams per cubic centimeter.
Claim 14
Dependent Claim
78 words
A soft, absorbent, creped, sanitary paper web product formed by deposition from an aqueous slurry, the web comprising: randomly arranged, contacting lignocellulosic fibers bonded together almost exclusively by papermaking bonds; the web being of uniform density and having a dry basis weight of from about 10 to 30 lbs/2,880 feet2, a TEA-to-stiffness ratio greater than 0.5 X 10 4 and an average calculated density throughout its thickness under no load of less than 0.3 grams per cubic centimeter.
Claim 15
Dependent Claim
27 words
A web according to claim 11, wherein the web is a bathroom tissue havinG a basis weight of from about 15 to about 22 lbs/2, 880 feet2.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |