US5888643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlling bending stiffness in photographic paper
Assignee: Eastman Kodak Co
•
Filing: 1997-05-23
•
Granted: 1999-03-30
•
Expires: 2017-05-23
Abstract
Abstract The invention relates to a method of providing a photographic imaging element having a bending stiffness between 150 and 250 millinewtons and a caliper thickness between about 0.18 mm and about 0.28 mm, comprising providing a laminated base sheet comprising a paper sheet having a Young's modulus of between about 13800 MPa to 2760 MPa in the machine direction and a Young's modulus of 6900 MPa to 1380 MPa in the cross direction, and having a biaxially oriented sheet on each side of said paper sheet having a Young's modulus of 690 MPa to 5520 MPa in the machine direction and a Young's modulus of 690 MPa to 5520 MPa in the cross machine direction and coating said laminated base sheet with photosensitive layers.
Inventors
- 👤 Peter T. Aylward
- 👤 Robert P. Bourdelais
- 👤 Douglas N. Haydock
- 👤 Thaddeus S. Gula
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:49
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/80; D21H19/84; G; G03; G03C; G03C1/00; G03C1/76; G03C1/765; G03C1/775; G03C1/79; G03C1/81; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249978; Y10T428/24998; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
83 words
A laminated base sheet for imaging substrates comprising a paper sheet having a Young's modulus of between about 13800 MPa to 2760 MPa in the machine direction and a Young's modulus of 6900 MPa to 1380 MPa in the cross direction and having a biaxially oriented sheet on each side of said paper sheet having a Young's modulus of 690 MPa to 5520 MPa in the machine direction and a Young's modulus of 690 MPa to 5520 MPa in the cross machine direction.
Claim 2
Dependent Claim
83 words
A laminated base sheet for imaging substrates comprising a paper sheet having a Young's modulus of between about 13800 MPa to 2760 MPa in the machine direction and a Young's modulus of 6900 MPa to 1380 MPa in the cross direction and having a biaxially oriented sheet on each side of said paper sheet having a Young's modulus of 690 MPa to 5520 MPa in the machine direction and a Young's modulus of 690 MPa to 5520 MPa in the cross machine direction.
Claim 3
Dependent Claim
28 words
The sheet of claim 1 wherein at least one of the biaxially oriented sheets on each side of said paper sheet comprises a biaxially oriented polyolefin microvoided sheet.
Claim 4
Dependent Claim
23 words
The sheet of claim 2 wherein said microvoided polyolefin sheet comprises a sheet of a % solid density between about 78 and 100%.
Claim 5
Dependent Claim
23 words
The sheet of claim 2 wherein said microvoided polyolefin sheet comprises a polypropylene sheet of a % solid density between 80 to 87%.
Claim 6
Dependent Claim
17 words
The sheet of claim 2 wherein said microvoided polyolefin sheet comprises a skin layer of nonvoided material.
Claim 7
Dependent Claim
17 words
The sheet of claim 2 wherein said microvoided polyolefin sheet comprises a skin layer on each surface.
Claim 8
Dependent Claim
21 words
The sheet of claim 2 wherein said microvoided polyolefin sheet has a thickness of between about 0.0127 mm and 0.0635 mm.
Claim 9
Dependent Claim
16 words
The sheet of claim 2 wherein said microvoided polyolefin sheet comprises a layer comprising titanium dioxide.
Claim 10
Dependent Claim
19 words
The sheet of claim 2 further comprising a layer of polyethylene between said microvoided sheet and said paper base.
Claim 11
Dependent Claim
21 words
The sheet of claim 2 wherein said microvoided sheet has a Young's modulus of between about 690 MPa to 5516 Mpa.
Claim 12
Dependent Claim
24 words
The sheet of claim 1 wherein said at least one of the biaxially oriented sheets on each side of said paper sheet comprises polyolefin.
Claim 13
Dependent Claim
11 words
The sheet of claim 11 wherein said polyolefin comprises polypropylene polymer.
Claim 14
Dependent Claim
17 words
The sheet of claim 1 wherein at least one biaxially oriented sheet comprises polypropylene and has microvoids.
Claim 15
Dependent Claim
15 words
The sheet of claim 11 wherein said polyolefin sheet comprises a layer comprising titanium dioxide.
Claim 16
Dependent Claim
21 words
The sheet of claim 13 further comprising at least one layer of polyethylene between said microvoided sheet and said paper base.
Claim 17
Dependent Claim
21 words
The sheet of claim 15 wherein said microvoided sheet has a Young's modulus of between about 690 MPa to 5516 MPa.
Claim 18
Dependent Claim
23 words
The sheet of claim 8 wherein said microvoided polyolefin sheet comprises a sheet of a % solid density between about 78 and 100%.
Claim 19
Dependent Claim
17 words
The sheet of claim 10 wherein said microvoided polyolefin sheet comprises a skin layer of nonvoided material.
Claim 20
Dependent Claim
20 words
The sheet of claim 17 wherein said microvoided polyolefin sheet comprises a skin layer of microvoided material on each surface.
Claim 21
Dependent Claim
13 words
The sheet of claim 1 wherein said paper comprises a cellulose fiber paper.
References Cited (Backward Citations)
GB1330510A
Cited
US3944699A
Cited
US4187113A
Cited
US4283486A
Cited
GB2108865A
Cited
US4377616A
Cited
EP0183467A1
Cited
US4579810A
Cited
US4632869A
Cited
US4778782A
Cited
US4758462A
Cited
EP0316081A1
Cited
US5227024A
Cited
JPH01282552A
Cited
US4912333A
Cited
US5110788A
Cited
US4994312A
Cited
US5141685A
Cited
US5275854A
Cited
USRE34742E
Cited
US5100862A
Cited
US5055371A
Cited
US5244861A
Cited
US5434039A
Cited
WO1994004961A1
Cited
WO1994006849A1
Cited
US5466519A
Cited
US5514460A
Cited
US5443915A
Cited
WO1996012766A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-03-29 | 2002-09-28 | 2003-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-03-29 | 2006-09-28 | 2007-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-03-29 | 2010-09-28 | 2011-03-30 | $7700.00 | Window Closed / Lapsed |