Patent US4493258A successfully refreshed from Google Patents.
US4493258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interfacing cam and toggle lockup
Assignee: Goss International LLC
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Filing: 1983-11-14
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Granted: 1985-01-15
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Expires: 2003-11-14
Abstract
Abstract An improved plate lockup mechanism for holding printing plates on a grooved plate cylinder, the mechanism having an elongated cam with an arcuate surface, a bar-like toggle including arcuate lower surfaces that mate with the surface of the cam and a securing member carried on the toggle for engaging the end of a plate and holding it in operative position.
Inventors
- 👤 Alan R. Wallschlaeger
- 👤 John F. Wade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:59
CPC Classifications
B; B41; B41F; B41F27/00; B41F27/12; B41F27/1218; B41F27/1225; B41F27/1243
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
168 words
A plate clamping arrangement for a reversible printing cylinder comprising in combination: A plate roll for receiving a flexible printing plate having mounting tangs on each end thereof, said roll having a longitudinal groove formed thereof; a bottom surface in said groove having a circular radius of curvature; sidewalls in said groove defining a volume greater than the volume defined by said bottom surface; a circular cam situated within said plate roll groove, said circular cam having an arcuate surface with a radius of curvature substantially equal to the radius of curvature of said bottom surface, said arcuate surface mating with said bottom surface, said cam having a groove running along the length thereof; a bar-like toggle situated within the groove of said plate roll, said bar-like toggle having a pair of lower surfaces that mate with the arcuate surface of said cam; and a generally U-shaped spring mounted on said toggle having upper free ends for engaging a plate to hold it in position on said roll.
Claim 2
Dependent Claim
168 words
A plate clamping arrangement for a reversible printing cylinder comprising in combination: A plate roll for receiving a flexible printing plate having mounting tangs on each end thereof, said roll having a longitudinal groove formed thereof; a bottom surface in said groove having a circular radius of curvature; sidewalls in said groove defining a volume greater than the volume defined by said bottom surface; a circular cam situated within said plate roll groove, said circular cam having an arcuate surface with a radius of curvature substantially equal to the radius of curvature of said bottom surface, said arcuate surface mating with said bottom surface, said cam having a groove running along the length thereof; a bar-like toggle situated within the groove of said plate roll, said bar-like toggle having a pair of lower surfaces that mate with the arcuate surface of said cam; and a generally U-shaped spring mounted on said toggle having upper free ends for engaging a plate to hold it in position on said roll.
Claim 3
Dependent Claim
35 words
A plate clamping arrangement as defined in claim 1 wherein said pair of lower surfaces on said toggle converge to define an edge that is located at the midpoint of the thickness of said toggle.
Claim 4
Dependent Claim
27 words
A plate clamping arrangement as defined in claim 1 wherein the end of said toggle nearest to the free upper ends of said U-shaped spring is relieved.
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) | 1988-01-15 | 1988-07-16 | 1989-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-15 | 1992-07-16 | 1993-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-15 | 1996-07-16 | 1997-01-15 | $7700.00 | Window Closed / Lapsed |