US3644167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of corrugating linerboard
Assignee: Georgia-Pacific LLC
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Filing: 1969-07-14
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Granted: 1972-02-22
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Expires: 1989-07-14
Abstract
Abstract A corrugating linerboard is prepared from a paperboard made from waste paper fiber by surface sizing the paperboard with an aqueous solution of 5 to 30 weight percent solids concentration of an alkali metal borate treated mixture of lignosulfonate and starch. The starch is present in the mixture in an amount of from 15 to 25 weight percent of the lignosulfonate solids and the mixture is treated with the alkali metal borate in an amount of from 1 to 5 weight percent of the lignosulfonate solids.
Inventors
- 👤 Warren E Mowry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:55
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/23; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1016; Y10T156/1021; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24669; Y10T428/24694
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
14 words
A process according to claim 1 wherein the lignosulfonate is a spent sulfite liquor.
Claim 2
Dependent Claim
64 words
A process according to claim 2 wherein the aqueous solution of the mixture has a concentration of from 15 to 20 weight percent solids and is applied to the board in an amount such that the solids content of the solution applied is in a range of from 0.1 to 3 weight percent of the dry weight of the cellulosic fiber in the sheet.
Claim 3
Dependent Claim
129 words
In a process for the preparation of a corrugated board, wherein a linerboard made from substantially waste paper pulp is attached to the fluted papersheet, the improvement which comprises applying to the surface of the substantially dry linerboard an aqueous solution consisting essentially of from 5 to 30 weight percent solids concentration of an alkali metal borate treated mixture of lignosulfonate and starch, said starch being present in the mixture in an amount of from 15 to 25 weight percent of the lignosulfonate solids, and said mixture being treated with the alkali metal borate in an amount of from 1 to 5 weight percent of the lignosulfonate solids, drying the so-treated linerboard, and forming the corrugated board by bonding the corrugated papersheet to the treated surface of the linerboard.
Claim 4
Dependent Claim
64 words
A process according to claim 4 wherein the aqueous solution of the mixture has a concentration of from 15 to 20 weight percent solids and is applied to the linerboard in an amount such that the solids content of the solution applied is in the range of from 0.1 to 3 weight percent of the dry weight of the cellulosic fiber in the linerboard.
Claim 5
Dependent Claim
16 words
A process according to claim 5 wherein the lignosulfonate is a calcium base spent sulfite liquor.
Claim 6
Dependent Claim
9 words
A linerboard obtained by the process of claim 1.
Claim 7
Dependent Claim
9 words
A linerboard obtained by the process of claim 2.
Claim 8
Dependent Claim
11 words
A corrugated board obtained according to the process of claim 4.
Claim 9
Dependent Claim
11 words
A corrugated board obtained according to the process of claim 6.
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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |