Patent US3859957A successfully refreshed from Google Patents.
US3859957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Release fluid applicator
Assignee: 3M Co
•
Filing: 1973-10-23
•
Granted: 1975-01-14
•
Expires: 1993-10-23
Abstract
Abstract An applicator-cleaner for applying a release and off-set preventing fluid to the surface of a cylindrical pressure fixing roller and for cleaning developer powder therefrom in which a rigid frame formed with one surface having two longitudinal edge areas separated by a central recess extending the length thereof has a wicking blanket, containing a release and off-set preventing fluid, stretched across its one surface to contact the two longitudinal edge areas. The frame is resiliently biased to forcibly engage the portions of the wicking blanket over the longitudinal edge areas of the frame against the pressure fixing roller.
Inventors
- 👤 Roger L Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:39
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2017; G03G15/2025
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
144 words
An applicator-cleaner for applying a release and off-set preventing fluid to the surface of a cylindrical pressure fixing roller and for cleaning developer powder therefrom, comprising: a rigid frame having a length corresponding to the length of a said pressure fixing roller and formed with one surface having two longitudinal edge areas separated by a central recess extending the length of said frame, a wicking blanket secured to said frame and stretched across said one surface of said frame to contact said two longitudinal edge areas thereof, a predetermined quantity of a release and offset preventing fluid contained in said wicking blanket, and resilient biasing means for urging said one surface of said rigid frame toward contact with the pressure fusing roller to forcibly engage the portions of said wicking blanket over said longitudinal edge areas of said frame against the pressure fusing roller.
Claim 2
Dependent Claim
144 words
An applicator-cleaner for applying a release and off-set preventing fluid to the surface of a cylindrical pressure fixing roller and for cleaning developer powder therefrom, comprising: a rigid frame having a length corresponding to the length of a said pressure fixing roller and formed with one surface having two longitudinal edge areas separated by a central recess extending the length of said frame, a wicking blanket secured to said frame and stretched across said one surface of said frame to contact said two longitudinal edge areas thereof, a predetermined quantity of a release and offset preventing fluid contained in said wicking blanket, and resilient biasing means for urging said one surface of said rigid frame toward contact with the pressure fusing roller to forcibly engage the portions of said wicking blanket over said longitudinal edge areas of said frame against the pressure fusing roller.
Claim 3
Dependent Claim
63 words
The applicator-cleaner of claim 1 including means supporting said rigid frame and said resilient biasing means for pivotal movement about an axis parallel to the axis of the fusing cylinder, said resilient biasing means being positioned between said pivot axis and said rigid frame to permit said rigid frame to be pivoted away from the fusing cylinder for replacement of said wicking blanket.
Claim 4
Dependent Claim
94 words
The applicator-cleaner of claim 2 wherein said rigid frame is formed with a longitudinal slot extending parallel to the length of said one surface thereof and wherein said means supporting said rigid frame includes a bar complementary in cross-sectional shape to said slot in said rigid frame to slidably receive and support said rigid frame, said bar being positioned between said rigid frame and said resilient biasing means, whereby said rigid frame may be pivoted away from the fusing cylinder and slidably removed from said supporting means and replaced to replace said wicking blanket.
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) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |