US4462867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper incorporating a partially embedded strip
Assignee: Portals Ltd
•
Filing: 1982-07-12
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Granted: 1984-07-31
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Expires: 2002-07-12
Abstract
Abstract A method of forming a paper comprises depositing paper fibres onto a support surface from a furnish by drainage, laying a strip having fibre deposition blocking regions and fibre deposition permitting regions onto the deposited fibres and continuing deposition to form a paper having the strip partially embedded in the paper and partially exposed.
Inventors
- 👤 James S. Fuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:01
CPC Classifications
D; D21; D21H; D21H27/00; D21H27/30; D21H27/32; D21H27/34; D21F; D21F11/00; D21F11/006; D21H21/00; D21H21/14; D21H21/40; D21H21/42
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
132 words
A method of forming a paper for security documents which method comprises depositing paper fibres from a liquid suspension onto a support surface from a furnish by drainage through the support surface, laying a strip over the deposited paper fibres, which strip has first regions of predetermined shape which will obstruct further drainage sufficiently to prevent any substantial deposition of paper fibres thereover and second regions which will obstruct further drainage insufficiently to prevent further deposition of paper fibres thereover, and depositing further paper fibres by drainage through said second regions and support surface so as to form a paper having the strip in part embedded therein and in part exposed on one surface thereof, the embedded part corresponding with said second regions and the exposed part corresponding with said first regions.
Claim 2
Independent Claim
132 words
A method of forming a paper for security documents which method comprises depositing paper fibres from a liquid suspension onto a support surface from a furnish by drainage through the support surface, laying a strip over the deposited paper fibres, which strip has first regions of predetermined shape which will obstruct further drainage sufficiently to prevent any substantial deposition of paper fibres thereover and second regions which will obstruct further drainage insufficiently to prevent further deposition of paper fibres thereover, and depositing further paper fibres by drainage through said second regions and support surface so as to form a paper having the strip in part embedded therein and in part exposed on one surface thereof, the embedded part corresponding with said second regions and the exposed part corresponding with said first regions.
Claim 3
Dependent Claim
27 words
A method as claimed in claim 1 wherein the strip comprises permeable regions constituting the said second regions and relatively impermeable regions constituting the said first regions.
Claim 4
Dependent Claim
26 words
A method as claimed in claim 2 wherein the permeable regions of the strip have a grammage of from 5 to 50 gms per square meter.
Claim 5
Dependent Claim
25 words
A method as claimed in claim 2 wherein the grammage of the impermeable regions of the strip is from 10 to 100 gms/m 2 .
Claim 6
Dependent Claim
51 words
A method as claimed in claim 2 wherein the permeable regions of the strip when subjected to the moisture, heat and pressure conditions experienced by paper in the papermaking process do not suffer any substantial permanent compression and have thicknesses before insertion into the paper of between 12 and 75 microns.
Claim 7
Dependent Claim
48 words
A method as claimed in claim 2 wherein the permeable regions of the strip when subjected to the moisture, heat and pressure conditions experienced by paper in the papermaking process suffer substantial permanent compression and have thicknesses before insertion into the paper of between 75 and 300 microns.
Claim 8
Dependent Claim
26 words
A method as claimed in claim 1 wherein the regions of the paper where the strip is exposed are regions in which a watermark is formed.
Claim 9
Dependent Claim
35 words
A method as claimed in claim 1 wherein the strip includes a security feature selected from the group consisting of magnetic, fluorescent, phosphorescent, metallic, and electrically conductive materials, dichroic filter materials, diffraction gratings, and holograms.
Claim 10
Dependent Claim
35 words
A method as claimed in claim 1 wherein the strip is made from a material selected from the group consisting of plastics film, metal film, textile material, non-woven fabric, paper and a plastics netting material.
References Cited (Backward Citations)
GB190919963A
Cited
GB237828A
Cited
GB423281A
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GB606862A
Cited
GB1008703A
Cited
GB1074118A
Cited
GB1127043A
Cited
GB1354414A
Cited
GB1365876A
Cited
US3880706A
Cited
GB1415538A
Cited
GB1498037A
Cited
GB1447933A
Cited
GB1474348A
Cited
GB1552853A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |