Patent US4426757A successfully refreshed from Google Patents.
US4426757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Web guide roller for use at high speeds and process for producing the same
Assignee: Agfa Gevaert AG
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Filing: 1981-08-06
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Granted: 1984-01-24
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Expires: 2001-08-06
Abstract
Abstract The invention relates to a web guide roller for a web which is required to be moved at a high speed, having cavities arranged on its surface for receiving the air carried with the moving web, whereby a finely branched network of compression chambers is arranged on the surface between plateau-like smoothly ground and polished areas on which the web lies in contact. Further the invention relates to a process for the production of this web guide rollers for use at high speed.
Inventors
- 👤 Roland Hourticolon
- 👤 Gerhard Roth
- 👤 Hans Frenken
- 👤 Helmut Schaffer
- 👤 Gunther Koepke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:22
CPC Classifications
F; F16; F16C; F16C13/00; B; B65; B65H; B65H27/00; B65H2404/00; B65H2404/10; B65H2404/18; B65H2404/181
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
100 words
A process for the production of cavities arranged on a surface of a metal cylindrical member comprising the steps of sand-blasting the surface of the cylindrical member, and then chrome-plating the sand-blasted surface and then grinding and polishing the chrome-plated surface to produce a finely branched net-work of compression chambers and troughs with adajacent plateau-like surfaces arranged on the member for receiving air from a moving web supported by the surface of the member, said network consisting of 60 to 70% of the member periphery, whereby the air carried by the moving web may be passed through the net-work chambers.
Claim 2
Dependent Claim
100 words
A process for the production of cavities arranged on a surface of a metal cylindrical member comprising the steps of sand-blasting the surface of the cylindrical member, and then chrome-plating the sand-blasted surface and then grinding and polishing the chrome-plated surface to produce a finely branched net-work of compression chambers and troughs with adajacent plateau-like surfaces arranged on the member for receiving air from a moving web supported by the surface of the member, said network consisting of 60 to 70% of the member periphery, whereby the air carried by the moving web may be passed through the net-work chambers.
Claim 3
Dependent Claim
77 words
A web guide for a fast moving web comprising a metal cylindrical member which has been surface sand-blasted and then chrome-plated and the chrome-plated surface has been ground and polished, a finely branched network of compression chambers and troughs with adjacent plateau-like areas on the member surface to produce a web-supporting circumference of the guide with depressions that can take up a volume of air, and said network consisting of 60 to 70% of the member circumference.
Claim 4
Dependent Claim
77 words
A web guide for a fast moving web comprising a metal cylindrical member which has been surface sand-blasted and then chrome-plated and the chrome-plated surface has been ground and polished, a finely branched network of compression chambers and troughs with adjacent plateau-like areas on the member surface to produce a web-supporting circumference of the guide with depressions that can take up a volume of air, and said network consisting of 60 to 70% of the member circumference.
Claim 5
Dependent Claim
37 words
A member according to claim 2, characterised in that it consists of aluminium which is sand blasted on its surface, chromium plated and ground in such a manner that a finely branched network of compression chambers remains.
Claim 6
Dependent Claim
52 words
A web guide roller according to claim 2, characterised in that grinding and polishing of the circumferential surface of the member to produce the plateau-like smooth surfaces are carried out in such a manner that the depth of roughness of the surface is less than 3 μm, preferably less than 1 μm.
Claim 7
Dependent Claim
52 words
A web guide roller according to claim 2, characterised in that the plateau like smooth surface for supporting and guiding the web constitutes 30 to 40% of the surface of the member and the finely branched network of compression chambers constitutes 60 to 70% of the surface of the web guide roller.
Claim 8
Dependent Claim
23 words
A member according to claim 2, characterised in that the depth of the troughs or compression chambers is from 30 to 80 μm.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-23 | 1987-07-25 | 1988-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-23 | 1991-07-25 | 1992-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-23 | 1995-07-25 | 1996-01-24 | $7700.00 | Window Closed / Lapsed |