US4518244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat fixer roll with an evaporated metal surface
Assignee: DuPont Toray Specialty Materials KK
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Filing: 1982-10-25
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Granted: 1985-05-21
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Expires: 2002-10-25
Abstract
Abstract A heat fixer roll made from a core covered with a layer of heat-resistant rubber coated with a layer of evaporated metal is useful in dry type electric photocopying machine to prevent the offset phenomenon.
Inventors
- 👤 Katsuaki Kageyama
- 👤 Ysushi Adachi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:43
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
65 words
A heat fixer roll suitable for use in a dry type electric photocopying machine comprising a cylindrical hollow roll body whose outer surface is covered with a heat-resistant rubber layer having a thickness in the range of from 0.5 to 2 millimeters and an evaporated metal layer having a thickness in the range of 10 -8 and 5×10 -7 meters covers the heat-resistant rubber layer.
Claim 2
Dependent Claim
65 words
A heat fixer roll suitable for use in a dry type electric photocopying machine comprising a cylindrical hollow roll body whose outer surface is covered with a heat-resistant rubber layer having a thickness in the range of from 0.5 to 2 millimeters and an evaporated metal layer having a thickness in the range of 10 -8 and 5×10 -7 meters covers the heat-resistant rubber layer.
Claim 3
Dependent Claim
55 words
The heat fixer roll according to claim 1 in which the heat-resistant rubber layer is a rubber selected from the group consisting of silicone rubbers, fluorine rubbers, chlorosulfonated polyethylene rubbers, and acrylic rubbers, and the evaporated metal layer is a metal selected from the group consisting of chromium alloy, chromium, titanium, aluminum, nickel, and silver.
Claim 4
Dependent Claim
35 words
The heat fixer roll according to claim 2 in which the heat-resistant rubber layer is a silicone rubber layer where the silicone rubber has a Shore A hardness in the range of 30 to 65.
Claim 5
Dependent Claim
46 words
The heat fixer roll according to claim 3 further comprising a primer coating over the outer surface of the roll body, the heat-resistant silicone rubber layer covering the primer coating, and said silicone rubber layer having a polished surface before the evaporated metal layer is applied.
Claim 6
Dependent Claim
49 words
The heat fixer roll according to claim 3 further comprising a primer coating over the outer surface of the roll body, the heat-resistant silicone rubber layer covering the primer coating, and said silicone rubber layer having its surface treated by glow discharge before the evaporated metal layer is applied.
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) | 1988-05-20 | 1988-11-19 | 1989-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-20 | 1992-11-19 | 1993-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-20 | 1996-11-19 | 1997-05-21 | $7700.00 | Window Closed / Lapsed |