US3911174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating flexible sheet material
Assignee: Anglo American Clays Corp
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Filing: 1974-05-16
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Granted: 1975-10-07
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Expires: 1994-05-16
Abstract
Abstract A method of applying a high solids coating to a traveling web of flexible sheet material which includes the steps of applying a high solids coating to the web in a quantity in excess of the amount desired to be coated thereon, positioning a wiping roll to engage and wipe and smooth the coating thus applied to the traveling web, rotating the wiping roll in a direction and at a surface speed of rotation sufficient to create a negative hydrodynamic pressure at the nip of engagement of the wiping roll with the coating applied to the traveling web, cleaning the surface of the wiping roll so that it continually presents a clean surface at the nip of engagement of the wiping roll with the coating applied to the traveling web, and drying the coated web. Rotation of the wiping roll in a direction opposed to the direction of movement of the traveling web and at a surface speed of rotation at least equal to the surface speed of movement of the traveling web creates a negative hydrodynamic pressure at the nip of engagement of the wiping roll with the coating applied to the traveling web, the upper limit of the speed of rotation being that which will leave the desired weight of high solids coating on the web.
Inventors
- 👤 Robert Charles Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:30
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/26; B05D1/265; B05D1/40; D; D21; D21H; D21H25/00; D21H25/08; D21H25/12; B05D2252/00; B05D2252/02
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
135 words
A METHOD OF APPLYING A HIGH SOLIDS COATING TO A TRAVELING WEB OF FLEXIBLE SHEET MATERIAL WHICH INCLUDES THE STEPS OF APPLYING A HIGH SOLIDS COATING TO THE WEB IN A QUANTITY IN EXCESS OF THE AMOUNT DESIRED TO BE COATED THEREON, POSITIONING A WIPING ROLL TO ENGAGE AND WIPE AND SMOOTH THE COATING THUS APPLIED TO THE TRAVELING WEB, ROTATING THE WIPING ROLL IN A DIRECTION AND AT A SURFACE SPEED OF ROTATION SUFFICIENT TO CREATE A NEGATIVE HYDRODYNAMIC PRESSURE AT THE NIP OF ENGAGEMENT OF THE WIPING ROLL WITH THE COATING APPLIED TO THE TRAVELING WEB, CLEANING THE SURFACE OF THE WIPING ROLL SO THAT IT CONTINUALLY PRESENTS A CLEAN SURFACE AT THE NIP OF ENGAGEMENT OF THE WIPING ROLL WITH THE COATING APPLIED TO THE TRAVELING WEB, AND DRYING THE COATED WEB.
Claim 2
Independent Claim
135 words
A METHOD OF APPLYING A HIGH SOLIDS COATING TO A TRAVELING WEB OF FLEXIBLE SHEET MATERIAL WHICH INCLUDES THE STEPS OF APPLYING A HIGH SOLIDS COATING TO THE WEB IN A QUANTITY IN EXCESS OF THE AMOUNT DESIRED TO BE COATED THEREON, POSITIONING A WIPING ROLL TO ENGAGE AND WIPE AND SMOOTH THE COATING THUS APPLIED TO THE TRAVELING WEB, ROTATING THE WIPING ROLL IN A DIRECTION AND AT A SURFACE SPEED OF ROTATION SUFFICIENT TO CREATE A NEGATIVE HYDRODYNAMIC PRESSURE AT THE NIP OF ENGAGEMENT OF THE WIPING ROLL WITH THE COATING APPLIED TO THE TRAVELING WEB, CLEANING THE SURFACE OF THE WIPING ROLL SO THAT IT CONTINUALLY PRESENTS A CLEAN SURFACE AT THE NIP OF ENGAGEMENT OF THE WIPING ROLL WITH THE COATING APPLIED TO THE TRAVELING WEB, AND DRYING THE COATED WEB.
Claim 3
Dependent Claim
138 words
A method of applying a high solids coating to a traveling web of flexible sheet material as specified in claim 1 which includes the steps of applying a high solids coating to both sides of the traveling web in a quantity in excess of the amount desired to be Coated thereon, positioning a wiping roll to each side of the traveling web, to engage and wipe and smooth the coating on both sides of the traveling web, rotating each wiping roll in a direction and at a surface speed of rotation sufficient to create a negative hydrodynamic pressure at the nip of engagement thereof with the coating which it is positioned to engage, and claaning the surface of each wiping roll so that it continually presents a clean surface to engage and wipe and smooth the applied coating.
Claim 4
Independent Claim
146 words
A method of applying a high solids coating to a traveling web of flexible sheet material which includes the steps of applying a high solids coating to the web in a quantity in excess of the amount desired to be coated thereon, positioning a wiping roll to engage and wipe and smooth the coating thus applied to the traveling web, rotating the wiping roll in a direction opposed to the direction of movement of the traveling web and at a surface speed of rotation at least equal to the surface speed of movement of the traveling web and in a range to leave on the web the desired weight of high solids coating, cleaning the surface of the wiping roll so that it continually presents a clean surface to engage and wipe and smooth the coating applied to the traveling web, and drying the coated web.
Claim 5
Independent Claim
146 words
A method of applying a high solids coating to a traveling web of flexible sheet material which includes the steps of applying a high solids coating to the web in a quantity in excess of the amount desired to be coated thereon, positioning a wiping roll to engage and wipe and smooth the coating thus applied to the traveling web, rotating the wiping roll in a direction opposed to the direction of movement of the traveling web and at a surface speed of rotation at least equal to the surface speed of movement of the traveling web and in a range to leave on the web the desired weight of high solids coating, cleaning the surface of the wiping roll so that it continually presents a clean surface to engage and wipe and smooth the coating applied to the traveling web, and drying the coated web.
Claim 6
Independent Claim
153 words
A method of applying a high solids coating to both sides of a traveling web of flexible sheet material which includes the step of applying a high solids coating to both sides of the web in a quantity in excess of the amount desired to be coated thereon, positioning a wiping roll to engage and wipe and smooth the coating on both sides of the traveling web, rotating each wiping roll in a direction opposed to the direction of movement of the traveling web with respect thereto, at a surface speed of rotation at least equal to the surface speed of movement of the traveling web, and in a range to leave on the web the desired weight of high solids coating, and cleaning the surface of each wiping roll so that each wiping roll continually presents a clean surface to engage and wipe and smooth the coating applied to the traveling web.
Claim 7
Independent Claim
153 words
A method of applying a high solids coating to both sides of a traveling web of flexible sheet material which includes the step of applying a high solids coating to both sides of the web in a quantity in excess of the amount desired to be coated thereon, positioning a wiping roll to engage and wipe and smooth the coating on both sides of the traveling web, rotating each wiping roll in a direction opposed to the direction of movement of the traveling web with respect thereto, at a surface speed of rotation at least equal to the surface speed of movement of the traveling web, and in a range to leave on the web the desired weight of high solids coating, and cleaning the surface of each wiping roll so that each wiping roll continually presents a clean surface to engage and wipe and smooth the coating applied to the traveling web.
Claim 8
Dependent Claim
35 words
A method of applying a high solids coating to a traveling web of flexible sheet material as specified in claim 3 in which the high solids coating has a solids content of at least 50%.
Claim 9
Dependent Claim
35 words
A method of applying a high solids coating to a traveling web of flexible sheet material as specified in claim 5 in which the solids content of the high solids coating is less than 70%.
Claim 10
Dependent Claim
44 words
A method of applying a high solids coating to a traveling web of flexible sheet material as specified in claim 3 in which the high solids coating comprises a high solids aqueous mineral coating composition including mineral pigment, adhesive matter, and an aqueous vehicle.
Claim 11
Dependent Claim
78 words
A method of applying a high solids coating to a traveling web of flexible sheet material as specified in claim 7 in which the mineral pigment is selected from a group consisting of kaolin, low-viscosity kaolin, calcium carbonate, low-viscosity calcium carbonate, titanium dioxide, and mixtures of the same, and the adhesive material is selected from a group consisting of starch, soy protein, and synthetic latex, and mixtures of the same, and wherein the aqueous vehicle is slightly alkaline.
Claim 12
Dependent Claim
54 words
A method of applying a high solids coating to a traveling web as specified in claim 3 in which the traveling web is paper selected from the group consisting of non-sized, internally sized and surface sized paper, and in which the high solids coating applied thereto comprises a high solids aqueous mineral coating composition.
Claim 13
Dependent Claim
58 words
A method of applying a high solids coating to a traveling web of flexible sheet material as specified in claim 5 in which the traveling web is paper selected from the group consisting of non-sized, internally sized and surface sized paper, and in which the high solids coating applied thereto comprises a high solids aqueous mineral coating composition.
Claim 14
Dependent Claim
38 words
A method of appLying a high solids coating to a traveling web of flexible material as specified in claim 10 in which the high solids squeous mineral coating composition includes mineral pigment, adhesive matter, and an aqueous vehicle.
Claim 15
Dependent Claim
78 words
A method of applying a high solids coating to a traveling web of flexible sheet material as specified in claim 11 in which the mineral pigment is selected from a group consisting of kaolin, low-viscosity kaolin, calcium carbonate, low-viscosity calcium carbonate, titanium dioxide, and mixtures of the same, and the adhesive material is selected from a group consisting of starch, soy protein, and synthetic latex, and mixtures of the same, and wherein the squeous vehicle is slightly alkaline.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |