US5534062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil reservoir
Assignee: WL Gore and Associates UK Ltd
•
Filing: 1993-03-19
•
Granted: 1996-07-09
•
Expires: 2013-03-19
Abstract
Abstract An oil supply device for supplying oil to a roll of an image reproduction machine, which includes an oil reservoir formed of an open-cell melamine foam; and a layer of oil permeation control material extending over the reservoir for controlling supply of oil from the reservoir to the roll. The oil permeation control material being formed of porous PTFE produced by fusing particles of grannular PTFE such as to form a porous integral network of interconnected particles.
Inventors
- 👤 Keith Dawson
- 👤 Robert Hayhurst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:26
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2017; G03G15/2025; G03G2215/00; G03G2215/20; G03G2215/2093; G03G2215/2096
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
90 words
An oil supply device for supplying oil to a roll of an image reproduction machine, which consists of an oil reservoir formed of an open-cell melamine foam which is free of any reinforcing layer internally within the foam; and a layer of oil permeation control material extending over the reservoir for controlling supply of oil from the reservoir to the roll, said oil permeation control material being formed of porous polytetrafluoroethylene (PTFE), produced by fusing particles of granular PTFE such as to form a porous integral network of interconnected particles.
Claim 2
Dependent Claim
90 words
An oil supply device for supplying oil to a roll of an image reproduction machine, which consists of an oil reservoir formed of an open-cell melamine foam which is free of any reinforcing layer internally within the foam; and a layer of oil permeation control material extending over the reservoir for controlling supply of oil from the reservoir to the roll, said oil permeation control material being formed of porous polytetrafluoroethylene (PTFE), produced by fusing particles of granular PTFE such as to form a porous integral network of interconnected particles.
Claim 3
Dependent Claim
22 words
A device according to claim 1 wherein the layer of oil permeation material is laminated onto a surface of the oil reservoir.
Claim 4
Dependent Claim
24 words
A device according to claim 2 wherein the oil supply device is in the form of a roller, the oil reservoir being substantially cylindrical.
Claim 5
Dependent Claim
35 words
A device according to claim 3 wherein the roller is oil-fed and the cylindrical reservoir comprises a hollow central shaft having oil delivery slots for feeding oil into the center of the cylindrical oil reservoir.
Claim 6
Dependent Claim
13 words
A device according to claim 1 wherein the reservoir is filled with oil.
Claim 7
Dependent Claim
18 words
A device according to claim 1 wherein the oil supply device is in the form of a pad.
References Cited (Backward Citations)
US3831553A
Cited
US3980424A
Cited
US4309957A
Cited
US4668537A
Cited
GB2242431A
Cited
EP0450894A1
Cited
EP0479564A2
Cited
US5232499A
Cited
DE4121962A1
Cited
US5267004A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-07-09 | 2000-01-08 | 2000-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-09 | 2004-01-08 | 2004-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-09 | 2008-01-08 | 2008-07-09 | $7700.00 | Window Closed / Lapsed |