US4061109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating and smoothing apparatus
Assignee: Wiggins Teape UK PLC
•
Filing: 1976-03-09
•
Granted: 1977-12-06
•
Expires: 1996-03-09
Abstract
Abstract A smoothing roll for use with apparatus for coating a web of paper or other sheet material, particularly for smoothing coatings at low wet coatweights of silicone compositions applicable in their natural state without the use of a solvent, has a soft elastomeric covering the smoothing surface of which is pitted and is substantially impermeable to liquid coating compositions.
Inventors
- 👤 Roger Anthony Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:10
CPC Classifications
D; D21; D21G; D21G1/00; D21G1/02; D21G1/0233; B; B05; B05C; B05C11/00; B05C11/02; B05C11/023; B05C11/025
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
92 words
Apparatus for coating a web of paper or other sheet material, comprising means for applying a liquid coating composition to a surface of the web, and, beyond said means in the direction of web movement, a smoothing roll having a soft elastomeric covering with a smoothing surface which is pitted, said pitted smoothing surface being substantially impermeable to liquid coating compositions, the smoothing roll being drivable in use to permit its surface to move relative to the coated surface of the web, thereby to smooth the coating previously applied by said means.
Claim 2
Dependent Claim
92 words
Apparatus for coating a web of paper or other sheet material, comprising means for applying a liquid coating composition to a surface of the web, and, beyond said means in the direction of web movement, a smoothing roll having a soft elastomeric covering with a smoothing surface which is pitted, said pitted smoothing surface being substantially impermeable to liquid coating compositions, the smoothing roll being drivable in use to permit its surface to move relative to the coated surface of the web, thereby to smooth the coating previously applied by said means.
Claim 3
Dependent Claim
30 words
Apparatus as claimed in claim 1 wherein the covering comprises a cellular elastomeric material of which the cells are closed cells, the pitted smoothing surface being formed by part cells.
Claim 4
Dependent Claim
22 words
Apparatus as claimed in claim 2 wherein the cellular elastomeric material is foamed neoprene, foamed natural or synthetic rubber, or foamed polyurethane.
Claim 5
Dependent Claim
43 words
Apparatus for coating a web of paper or other sheet material, comprising means for applying a liquid coating composition of a surface of the web, and, beyond said means in the direction of web movement, a smoothing roll as claimed in claim 3.
Claim 6
Dependent Claim
22 words
Apparatus as claimed in claim 1 wherein the covering comprises a soft solid natural or synthetic rubber having a pitted smoothing surface.
Claim 7
Dependent Claim
26 words
Apparatus as claimed in claim 5 wherein the rubber has a hardness of about 30° Shore and a density of up to 0.9 g/cm 3 .
Claim 8
Dependent Claim
31 words
Apparatus as claimed in claim 1 wherein the covering has a laminar construction comprising an impermeable surface layer having a pitted smoothing surface and a resilient under layer of elastomeric material.
References Cited (Backward Citations)
US1924994A
Cited
US2288675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-05 | 1981-06-06 | 1981-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-05 | 1985-06-06 | 1985-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-05 | 1989-06-06 | 1989-12-06 | $7700.00 | Window Closed / Lapsed |