Patent US4970768A successfully refreshed from Google Patents.
US4970768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shot blasted web conveying roller
Assignee: Eastman Kodak Co
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Filing: 1989-10-25
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Granted: 1990-11-20
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Expires: 2009-10-25
Abstract
Abstract A stainless steel roller for conveying a web has a surface prepared by blasting the surface of the roller with steel shot to create on the surface a deep texture with well rounded down features and sharp up features with peaks. The blasted surface is finished with a grinding action for removing the peaks to produce plateaus surrounded by interconnected channels. The interconnected channels of the surface allow air entrained between the roller surface and a web to be vented through the channels while the web is in contact with the roller.
Inventors
- 👤 Daniel C. Lioy
- 👤 Edward F. Hurtubis
- 👤 Edward R. Schickler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:58
CPC Classifications
B; B41; B41N; B41N7/00; B65; B65H; B65H27/00; B41N2207/00; B41N2207/02; B65H2404/00; B65H2404/10; B65H2404/18; B65H2404/181; B65H2404/50; B65H2404/52; B65H2404/521
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A web conveyance roller having a surface with generally spherical down features, many of the down features overlapping to form interconnected channels comprising at least 50% of the surface area of the roller, the depth of the down features being greater than about 500 microns but less than about 1000 microns, and a plurality of plateaus between the channels comprising at least 20% of the surface area of the roller.
Claim 2
Dependent Claim
70 words
A web conveyance roller having a surface with generally spherical down features, many of the down features overlapping to form interconnected channels comprising at least 50% of the surface area of the roller, the depth of the down features being greater than about 500 microns but less than about 1000 microns, and a plurality of plateaus between the channels comprising at least 20% of the surface area of the roller.
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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) | 1993-11-19 | 1994-05-21 | 1994-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-19 | 1998-05-21 | 1998-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-19 | 2002-05-21 | 2002-11-20 | $7700.00 | Window Closed / Lapsed |