US3913480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for locking up flexible printing plates on forme cylinders of printing presses
Assignee: Koenig and Bauer AG
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Filing: 1973-04-17
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Granted: 1975-10-21
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Expires: 1993-04-17
Abstract
Abstract The invention relates to a device for locking up flexible printing plates on forme cylinders of printing presses in which the printing plate is fastened detachably at its one axially extending first end to a first edge of a cylinder groove and its second end is connected with a spring fastener, the resilience of which can be released by means of a rotatable longitudinal shaft.
Inventors
- 👤 Bertram Wilhelm-Georg Dauner
- 👤 Helmut Hermann Marx
- 👤 Karl-Heinz Arno Wolfram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:55
CPC Classifications
B; B41; B41F; B41F27/00; B41F27/12; B41F27/1218; B41F27/1225; B41F27/1243
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
416 words
A device for detachably holding flexible printing plates on forme cylinders of printing presses, said device comprising in combination: a forme cylinder having an axially extending groove in its periphery; a first locking plate rotatably positioned in said groove, said first locking plate extending substantially the width of said printing plate, said first locking plate having an axially extending hinge portion at its lower end and hook portions on its upper end, said hook portions being receivable in apertures in a first end of said printing plate; a hold down bar secured in said groove; a first cam means rotatably carried in an axially extending recess in said hold down bar, said first cam means and said hold down bar extending substantially the length of said groove, said first cam means having wrench receiving means on an end thereof for rotating said first cam means to cause said first cam means to press against a first side of said first locking plate throughout its length; a leaf spring having a transversely extending bottom end positioned in said groove beneath said hold down bar and having an upper end which presses against a second side of said first locking plate, said first cam means and said leaf spring holding said first end of said printing plate in a selected position; a second locking plate rotatably positioned in said groove opposite said first locking plate, said second locking plate extending substantially the width of said printing plate, said second locking plate having an axially extending hinge portion at its lower eNd and hook portions on its upper end, said hook portions being receivable in apertures in a second end of said printing plate; a second cam means rotatably carried in a wall of said groove and having wrench receiving means on an end thereof for rotating said second cam means to cause said second cam means to press against a first side of said second locking plate throughout its length; a spring carried in said hold down bar and pressing against a second side of said second locking plate, said second cam means and said spring holding said second end of said printing plate in a selected position; and a hinge plate, said hinge plate having semicircular end portions opening downwardly to secure said hinge portions of said first and said second locking plates, said hinge plate being positioned in said groove beneath said hold down bar and above said transversely extending bottom portion of said leaf spring.
Claim 2
Independent Claim
416 words
A device for detachably holding flexible printing plates on forme cylinders of printing presses, said device comprising in combination: a forme cylinder having an axially extending groove in its periphery; a first locking plate rotatably positioned in said groove, said first locking plate extending substantially the width of said printing plate, said first locking plate having an axially extending hinge portion at its lower end and hook portions on its upper end, said hook portions being receivable in apertures in a first end of said printing plate; a hold down bar secured in said groove; a first cam means rotatably carried in an axially extending recess in said hold down bar, said first cam means and said hold down bar extending substantially the length of said groove, said first cam means having wrench receiving means on an end thereof for rotating said first cam means to cause said first cam means to press against a first side of said first locking plate throughout its length; a leaf spring having a transversely extending bottom end positioned in said groove beneath said hold down bar and having an upper end which presses against a second side of said first locking plate, said first cam means and said leaf spring holding said first end of said printing plate in a selected position; a second locking plate rotatably positioned in said groove opposite said first locking plate, said second locking plate extending substantially the width of said printing plate, said second locking plate having an axially extending hinge portion at its lower eNd and hook portions on its upper end, said hook portions being receivable in apertures in a second end of said printing plate; a second cam means rotatably carried in a wall of said groove and having wrench receiving means on an end thereof for rotating said second cam means to cause said second cam means to press against a first side of said second locking plate throughout its length; a spring carried in said hold down bar and pressing against a second side of said second locking plate, said second cam means and said spring holding said second end of said printing plate in a selected position; and a hinge plate, said hinge plate having semicircular end portions opening downwardly to secure said hinge portions of said first and said second locking plates, said hinge plate being positioned in said groove beneath said hold down bar and above said transversely extending bottom portion of said leaf spring.
Claim 3
Dependent Claim
29 words
The device of claim 1 wherein said hold down bar is secured in said groove by screws extending through said bar and being threadably received in said forme cylinder.
Claim 4
Dependent Claim
28 words
The device of claim 1 wherein said second cam means further includes a vernier scale means whereby the position of said second cam means may be accurately determined.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |