Patent US4929474A successfully refreshed from Google Patents.
US4929474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making high quality extrusion coated paper for quality printing
Assignee: Union Camp Corp
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Filing: 1989-04-03
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Granted: 1990-05-29
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Expires: 2009-04-03
Abstract
Abstract A process of producing high quality extrusion coated paper for high quality printing by extruding polyethylene on a highly smoothed base sheet of paper and passing the coated base sheet through the nip of two cooperating rollers, at least one of which rollers is a low-friction gloss chill roller having a surface finish with a degree of roughness between that of a high gloss roller and a matte finished roller.
Inventors
- 👤 Eitan Avni
- 👤 Simon Salama
- 👤 Eran Turi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:50
CPC Classifications
B; B32; B32B; B32B37/00; B32B37/14; B32B37/15; B32B37/153; B05; B05C; B05C11/00; B05C11/02; B05C11/023; B05C11/025; B32B27/00; B32B27/06; B32B27/08; B32B27/10; B32B27/32; B32B38/00; B32B38/0012; B32B38/14; B32B38/145; D; D21; D21H; D21H19/00; D21H19/10; D21H19/14; D21H19/20; D21H19/22; D21H23/00; D21H23/02; D21H23/22; D21H23/46; D21H25/00; D21H25/08; D21H25/12; D21H25/14; B32B2038/0052; B32B2038/0064; B32B2255/00; B32B2255/12; B32B2255/26; B32B2317/00; B32B2317/12; B32B2323/00; B32B2323/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
115 words
A process of manufacturing a polyolefin coated paper substrate having high quality printing thereon, said process comprising the steps of: providing a highly smooth base sheet of paper; extruding a coat of polyolefin on at least one side of the base sheet; pressing the coat of polyolefin and the base sheet together by passing them through a nip of a pair of cooperating rollers wherein at least one of said pair of rollers is a low-friction chill roller which contacts the polyolefin coating for reducing a plurality of surface defects in said polyolefin coating which are of a size equal to or greater than a dot element of print; and printing on said polyolefin coating.
Claim 2
Dependent Claim
115 words
A process of manufacturing a polyolefin coated paper substrate having high quality printing thereon, said process comprising the steps of: providing a highly smooth base sheet of paper; extruding a coat of polyolefin on at least one side of the base sheet; pressing the coat of polyolefin and the base sheet together by passing them through a nip of a pair of cooperating rollers wherein at least one of said pair of rollers is a low-friction chill roller which contacts the polyolefin coating for reducing a plurality of surface defects in said polyolefin coating which are of a size equal to or greater than a dot element of print; and printing on said polyolefin coating.
Claim 3
Dependent Claim
21 words
The process in accordance with claim 1 which includes calendering the base sheet to reduce the defects in the base sheet.
Claim 4
Dependent Claim
22 words
The process in accordance with claim 2 which includes the step of providing an extrusion coating of polyethylene on the base sheet.
Claim 5
Dependent Claim
25 words
The process in accordance with claim 3 which includes the step of operating the chill roller at a temperature below a softening temperature of polyethylene.
Claim 6
Dependent Claim
22 words
The process in accordance with claim 4 which includes the step of operating the chill roller at a temperature between 50°-55° F.
Claim 7
Dependent Claim
25 words
The process in accordance with claim 5 which includes the step of applying pressure at said nip of between 10 and 30 kg/cm 2 .
Claim 8
Dependent Claim
21 words
The process in accordance with claim 6 which includes the step of yankee drum treating the base sheet prior to coating.
Claim 9
Dependent Claim
28 words
The process in accordance with claim 7 which includes providing a base sheet of heavily calendered natural unbleached Kraft and polyethylene which is melted at above 600° F.
Claim 10
Dependent Claim
21 words
The process in accordance with claim 2 which includes the step of yankee drum treating the base sheet prior to coating.
Claim 11
Dependent Claim
87 words
A process for producing high quality extrusion coated paper with high quality printing, comprising extruding a polyethylene coating on a highly smoothed based sheet of paper, passing the paper base sheet with said polyethylene coating through a pair of rollers wherein at least one of said pair of rollers is a low-friction gloss chill roller which contacts said polyethylene coating, said passing resulting in said polyethylene coating having defect sizes limited to being on the order of printing dot size; and printing on said extrusion coated paper.
Claim 12
Dependent Claim
87 words
A process for producing high quality extrusion coated paper with high quality printing, comprising extruding a polyethylene coating on a highly smoothed based sheet of paper, passing the paper base sheet with said polyethylene coating through a pair of rollers wherein at least one of said pair of rollers is a low-friction gloss chill roller which contacts said polyethylene coating, said passing resulting in said polyethylene coating having defect sizes limited to being on the order of printing dot size; and printing on said extrusion coated paper.
Claim 13
Dependent Claim
22 words
The process of claim 10, further comprising the step of printing on said coated paper with a process of flexography and gravure.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-28 | 1993-11-27 | 1994-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-28 | 1997-11-27 | 1998-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-28 | 2001-11-27 | 2002-05-29 | $7700.00 | Window Closed / Lapsed |