US4391638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for reclaiming ink waste
Assignee: JM Huber Corp
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Filing: 1982-04-22
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Granted: 1983-07-05
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Expires: 2002-04-22
Abstract
Abstract An improved method for reclaiming waste printing ink is provided wherein waste offset ink is diluted and, thereafter, free water and waste fibrous material is separated through specific gravity differential. A centrifugal method is provided to facilitate separation and to produce an easily disposable waste cake. A heating step is also provided to minimize the quantity of dilutant necessary to reduce fluid friction.
Inventors
- 👤 Gerard A. Fusco
- 👤 Glenn van Lier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:10
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/03
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
82 words
A method for reclaiming waste ink contaminated with solid, fibrous impurities comprising, diluting said waste ink with ink oil to form an ink mixture; heating said mixture until the viscosity of said mixture is less than substantially 60 poise; thereafter, subjecting said mixture to an angular acceleration sufficient to separate said solid, fibrous impurities from said ink mixture to produce a clarified ink; and blending with said clarified ink sufficient virgin ink to produce a printing ink having a predetermined rheological property.
Claim 2
Dependent Claim
21 words
The method of claim 1 wherein the viscosity of said ink mixture is reduced to substantially 125 poise with ink oil.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein said ink mixture is heated to between 160 degrees to 180 degrees F.
Claim 4
Dependent Claim
19 words
The method of claim 1 wherein said angular acceleration is greater than substantially 12,000 times the force of gravity.
Claim 5
Dependent Claim
39 words
The method of claim 1 wherein said virgin ink is blended with said clarified ink in a ratio of between 2 parts virgin ink to 1 part clarified ink and 5 parts virgin ink to 1 part clarified ink.
Claim 6
Dependent Claim
29 words
The method of claim 5 wherein said virgin ink is blended with said clarified ink in a ratio of substantially 4 parts virgin ink to 1 part clarified ink.
Claim 7
Dependent Claim
17 words
The method of claim 1 wherein said printing ink has a viscosity greater than substantially 200 poise.
Claim 8
Independent Claim
116 words
A method for reclaiming waste ink contaminated with solid, fibrous impurities and water comprising, diluting said waste ink with ink oil to form an ink mixture having a viscosity less than substantially 125 poise; heating said mixture to a temperature between substantially 160 degrees F. and 180 degrees F. to reduce the viscosity of said mixture sufficient to permit centrifical separation of said solid, fibrous impurities and water from said ink mixture; subjecting said mixture to a centrifugal acceleration at least substantially 12,000 times the force of gravity to produce a clarified ink; and blending said clarified ink with sufficient virgin ink to produce a printing ink having a viscosity of greater than substantially 200 poise.
Claim 9
Independent Claim
79 words
A method for reclaiming waste offset ink contaminated with solid, fibrous impurities, said method comprising, diluting said waste ink with ink oil to form an ink mixture having a viscosity substantially equal to virgin letterpress ink; thereafter, subjecting said mixture to angular acceleration sufficient to separate said solid, fibrous impurities from said ink mixture to produce a clarified ink; and blending with said clarified ink sufficient virgin ink to produce a letterpress printing ink having a predetermined rheological property.
Claim 10
Dependent Claim
20 words
The method of claim 9 wherein the viscosity of said ink mixture is reduced to substantially 30 to 40 poise.
Claim 11
Dependent Claim
17 words
The method of claim 9 wherein said angular acceleration is substantially 12,000 times the force of gravity.
Claim 12
Dependent Claim
39 words
The method of claim 9 wherein said clarified ink is blended with virgin letterpress ink in a ratio of between 2 parts virgin ink to 1 part clarified ink and 5 parts virgin ink to 1 part clarified ink.
Claim 13
Dependent Claim
29 words
The method of claim 12 wherein said clarified ink is blended with virgin letterpress ink in a ratio of substantially 4 parts virgin ink to 1 part clarified ink.
Claim 14
Dependent Claim
20 words
The method of claim 9 wherein said letterpress printing ink has a viscosity of substantially 30 poise to 40 poise.
References Cited (Backward Citations)
US181597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-04 | 1987-01-03 | 1987-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-04 | 1991-01-03 | 1991-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-04 | 1995-01-03 | 1995-07-05 | $7700.00 | Window Closed / Lapsed |