US4593480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper deflection roller for a printer or copier means functioning on the principle of electrophotography
Assignee: Wincor Nixdorf International GmbH
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Filing: 1984-01-23
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Granted: 1986-06-10
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Expires: 2004-01-23
Abstract
Abstract A paper web recording medium provided with toner images as conducted through a fixing housing containing solvent vapor over a paper deflection drum for fixing the toner images on the recording medium. The paper deflection drum is formed by a rigid roller body made of expanded or foamed plastic over which an elastic grid network fabric of toner-repellent material is drawn as an exterior surface sleeve. A low-mass paper deflection roller having low thermal conductivity is thus provided, so that no solvent vapor can condense at the surface of the fixing drum. The low-mass structure of the paper deflection drum also prevents a smear print when starting or stopping conduct of the paper web through the fixing housing.
Inventors
- 👤 Eduard Mair
- 👤 Siegfried Zoeke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:59
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2096; B; B65; B65H; B65H27/00; B65H2404/00; B65H2404/10; B65H2404/15; B65H2404/153; B65H2404/1532; B65H2404/18; B65H2404/183; B65H2404/1831; Y; Y10; Y10S; Y10S118/00; Y10S118/15; Y10S428/00; Y10S428/906
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
154 words
A deflection roller for guiding a recording medium applied with toner through a printing device fixing station housing containing solvent vapor and having a cooling coil means disposed adjacent an upper end of said housing and a heater for evaporating liquid solvent into vapor adjacent a lower end of said housing, comprising a cylindrical roller body made of lightweight plastic material on which is a grid-network mesh structure, in the form of an individual synthetic fabric sleeve fitted over said roller body, providing narrow raised lines enclosing open area depressions bottomed by the exterior surface of said roller body such that said recording medium is supported on said raised lines at a free space distance away from said roller body, such that said deflection roller means has low mass, a low mass moment of inertia, and very low thermal conductivity for high speed operation while avoiding solvent vapor dewing on said deflection roller means.
Claim 2
Dependent Claim
154 words
A deflection roller for guiding a recording medium applied with toner through a printing device fixing station housing containing solvent vapor and having a cooling coil means disposed adjacent an upper end of said housing and a heater for evaporating liquid solvent into vapor adjacent a lower end of said housing, comprising a cylindrical roller body made of lightweight plastic material on which is a grid-network mesh structure, in the form of an individual synthetic fabric sleeve fitted over said roller body, providing narrow raised lines enclosing open area depressions bottomed by the exterior surface of said roller body such that said recording medium is supported on said raised lines at a free space distance away from said roller body, such that said deflection roller means has low mass, a low mass moment of inertia, and very low thermal conductivity for high speed operation while avoiding solvent vapor dewing on said deflection roller means.
Claim 3
Dependent Claim
14 words
The deflection roller of claim 1, wherein said sleeve is made of toner-repellent material.
Claim 4
Dependent Claim
17 words
The deflection roller of claim 2, wherein said roller body is made of a foamed plastic material.
Claim 5
Dependent Claim
30 words
The deflection roller of claim 1, wherein said sleeve overlaps the opposed lateral edges of said roller body and is bonded to the opposed end faces of said roller body.
Claim 6
Dependent Claim
24 words
The deflection roller of claim 1, wherein said roller body is made of foamed polymethylacrylimide and said grid-network mesh structure is made of polyethylene.
Claim 7
Independent Claim
179 words
A device for fixing toner powder images applied to a recording medium by means of a solvent vapor by guiding said recording medium about a deflection roller means disposed in an open top housing containing solvent vapor and having a cooling coil means disposed adjacent an upper end of said housing and a heater for evaporating liquid solvent into vapor adjacent a lower end of said housing, said deflection roller means having a cylindrical roller body made of lightweight plastic material disposed for rotation in said housing and a grid-network mesh structure, in the form of an individual synthetic fabric sleeve disposed about said roller body defining narrow raised lines of toner-repellent material enclosing open area depressions bottomed by the exterior surface of said roller body, said recording medium being supported on said raised lines at a free space distance away from said roller body, such that said deflection roller means has low mass, a low mass moment of inertia, and very low thermal conductivity for high speed operation while avoiding solvent vapor dewing on said deflection roller means.
Claim 8
Independent Claim
179 words
A device for fixing toner powder images applied to a recording medium by means of a solvent vapor by guiding said recording medium about a deflection roller means disposed in an open top housing containing solvent vapor and having a cooling coil means disposed adjacent an upper end of said housing and a heater for evaporating liquid solvent into vapor adjacent a lower end of said housing, said deflection roller means having a cylindrical roller body made of lightweight plastic material disposed for rotation in said housing and a grid-network mesh structure, in the form of an individual synthetic fabric sleeve disposed about said roller body defining narrow raised lines of toner-repellent material enclosing open area depressions bottomed by the exterior surface of said roller body, said recording medium being supported on said raised lines at a free space distance away from said roller body, such that said deflection roller means has low mass, a low mass moment of inertia, and very low thermal conductivity for high speed operation while avoiding solvent vapor dewing on said deflection roller means.
Claim 9
Dependent Claim
23 words
The device of claim 6, wherein said roller body is made of foamed polymethylacrylimide and said grid-network mesh structure is made of polyethylene.
Claim 10
Dependent Claim
16 words
The device of claim 6, wherein said roller body is made of a foamed plastic material.
Claim 11
Dependent Claim
23 words
The device of claim 8, wherein said roller body is made of foamed polymethylacrylimide and said grid-network mesh structure is made of polyethylene.
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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) | 1989-06-09 | 1989-12-09 | 1990-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-09 | 1993-12-09 | 1994-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-09 | 1997-12-09 | 1998-06-10 | $7700.00 | Window Closed / Lapsed |