Patent US1338508A successfully refreshed from Google Patents.
Patent US238391A successfully refreshed from Google Patents.
Patent US4120263A successfully refreshed from Google Patents.
US4120263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Matrix supporting devices in electrostatic development apparatus
Assignee: GRATOSOL Srl
•
Filing: 1977-02-18
•
Granted: 1978-10-17
•
Expires: 1997-02-18
Abstract
Abstract Improvements to a matrix supporting device in electrostatic development apparatus, wherein the pliers retaining the matrix rear portion can be moved along a cylindrical surface to which said matrix is intended to adhere. A cam controlled oscillating support provides for a magnetic roller and its associated toner carrying tray to be moved away from the cylindrical surface to allow for passage of the pliers.
Inventors
- 👤 Vittorino Boschet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:29
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6529; G03G15/06; G03G15/08; G03G15/0896
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
91 words
Improvements in matrix supporting devices for use in electrostatic development apparatus having a cylindrical surface to which a matrix sheet is to adhere, pliers for retaining a rear portion of the matrix sheet, a magnetic cylinder or roller, and associated toner containing tray, said improvements comprising: means for moving said pliers along said cylindrical surface; and carrying means supporting said magnetic cylinder or roller and associated toner containing tray, such that said cylinder or roller and said tray are moved away from said cylindrical surface to allow passage of said pliers.
Claim 2
Dependent Claim
91 words
Improvements in matrix supporting devices for use in electrostatic development apparatus having a cylindrical surface to which a matrix sheet is to adhere, pliers for retaining a rear portion of the matrix sheet, a magnetic cylinder or roller, and associated toner containing tray, said improvements comprising: means for moving said pliers along said cylindrical surface; and carrying means supporting said magnetic cylinder or roller and associated toner containing tray, such that said cylinder or roller and said tray are moved away from said cylindrical surface to allow passage of said pliers.
Claim 3
Dependent Claim
16 words
The improvements as claimed in claim 1, wherein said carrying means includes a cam-controlled oscillating support.
Claim 4
Dependent Claim
107 words
The improvements as claimed in claim 6, wherein said means for moving said pliers along said cylindrical surface includes: a motor spaced from and mounted for rotation about the longitudinal central axis of said cylindrical surface; a shaft connected for rotation by said motor; a support means supporting said shaft and said pliers for movement about said axis; gear means on said shaft; and sector gears disposed at opposite ends of said cylindrical surface and engaging said gear means; whereby activation of said motor causes movement of said shaft with respect to said sector gears and corresponding movement of said pliers with respect to said cylindrical surface.
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) | 1981-10-16 | 1982-04-17 | 1982-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-16 | 1986-04-17 | 1986-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-16 | 1990-04-17 | 1990-10-17 | $7700.00 | Window Closed / Lapsed |