Patent US2263228A successfully refreshed from Google Patents.
Patent US3835778A successfully refreshed from Google Patents.
US3835778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for attaching and adjusting flexible printing plates on printing cylinders
Assignee: Grapho Metronic Mess und Regeltechnik GmbH and Co KG
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Filing: 1973-09-14
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Granted: 1974-09-17
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Expires: 1993-09-14
Abstract
Abstract A printing plate is adjustably secured to a printing cylinder by clamping bars which are adjustably mounted in an axially extending recess of the printing cylinder and which are configured to grip opposite ends of a printing plate for assuring proper alignment of registration marks on the printing plate and on the printing cylinder. A first pair of clamping bars which are adapted to first have an edge of the printing plate clamped therebetween are equipped with a pin and slot arrangement located at substantially the longitudinal center of the clamping bars. A pair of adjustment screw means are located at opposite ends of the clamping bars to permit adjustment of the ends circumferentially of the printing cylinder. The adjustment screw means are provided with indicator means to indicate the adjusted position of the clamping bars and, after the clamping bars have been placed in their adjusted position, the slotted portion of the centrally located pin and slot arrangement is axially fixed relative to the printing cylinder. The slot is configured to extend in its longitudinal direction circumferentially of the cylinder and the pin, which is spring mounted to the clamping bars, extends radially into the slot.
Inventors
- 👤 E Bock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:32
CPC Classifications
B; B41; B41F; B41F27/00; B41F27/005; B41F27/12; B41F27/1218; B41F27/1225; B41F27/1231
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
255 words
In a device for adjustably securing a printing plate on a printing cylinder, said printing cylinder including an axially extending recess and a plurality of pairs of clamping barS adjustably mounted in said recess for axial and tangential movement therein relative to said printing cylinder, said clamping bars being arranged for gripping therebetween an edge of said printing plate aligned relative to said printing cylinder in accordance with registration marks appearing on said printing plate and printing cylinder, with alignment means formed on a first pair of said clamping bars which are adapted to first have a printing plate edge clamped therebetween, said alignment means being arranged to mate with related alignment means formed on said first clamped printing plate edge for guiding said printing plate into clamped engagement with said clamping bars, the improvement comprising, in combination, a pin attached at said first clamping bars at substantially the longitudinal center thereof, means located in said recess defining a slot extending generally circumferentially of said printing cylinder, said slotdefining means being positioned relative to said cylinder to locate said slot with said pin extending thereinto, a pair of adjustment screw means operatively associated with said first clamping bar pair at opposite ends thereof to effect adjustment of said clamping bars circumferentially of said printing cylinder, said adjustment screw means including indicator means to indicate the adjusted position of said clamping bars, and means enabling said slot-defining means to be adjustably fixed relative to said printing cylinder after said printing plate has been accurately mounted thereupon.
Claim 2
Dependent Claim
255 words
In a device for adjustably securing a printing plate on a printing cylinder, said printing cylinder including an axially extending recess and a plurality of pairs of clamping barS adjustably mounted in said recess for axial and tangential movement therein relative to said printing cylinder, said clamping bars being arranged for gripping therebetween an edge of said printing plate aligned relative to said printing cylinder in accordance with registration marks appearing on said printing plate and printing cylinder, with alignment means formed on a first pair of said clamping bars which are adapted to first have a printing plate edge clamped therebetween, said alignment means being arranged to mate with related alignment means formed on said first clamped printing plate edge for guiding said printing plate into clamped engagement with said clamping bars, the improvement comprising, in combination, a pin attached at said first clamping bars at substantially the longitudinal center thereof, means located in said recess defining a slot extending generally circumferentially of said printing cylinder, said slotdefining means being positioned relative to said cylinder to locate said slot with said pin extending thereinto, a pair of adjustment screw means operatively associated with said first clamping bar pair at opposite ends thereof to effect adjustment of said clamping bars circumferentially of said printing cylinder, said adjustment screw means including indicator means to indicate the adjusted position of said clamping bars, and means enabling said slot-defining means to be adjustably fixed relative to said printing cylinder after said printing plate has been accurately mounted thereupon.
Claim 3
Dependent Claim
26 words
A device according to claim 1, wherein said pin is spring mounted upon said clamping bars to extend in a direction radially of said printing cylinder.
Claim 4
Dependent Claim
30 words
A device according to claim 1, wherein said pin is formed in a tapered configuration extending into said slot, said slot being also formed with a correspondingly shaped tapered configuration.
Claim 5
Dependent Claim
45 words
A device according to claim 1, wherein said indicator means include a spring mounted adjustable scanning pointer extending parallel to said adjustment screw means associated therewith, and calibrated dial means mounted upon said adjustment screw means in a position for engagement with said scanning pointer.
Claim 6
Dependent Claim
34 words
A device according to claim 4, wherein said scanning pointer is mounted within a reciprocal member arranged upon said clamping bars for reciprocating movement relative thereto in the longitudinal direction of the scanning pointer.
Claim 7
Dependent Claim
26 words
A device according to claim 5, wherein said reciprocal member is threadedly engaged by screw means within said clamping bars to enable adjustable reciprocating movement thereof.
Claim 8
Dependent Claim
19 words
A device according to claim 1, wherein said indicator means are adjustably fixed relative to said adjustment screw means.
Claim 9
Dependent Claim
76 words
A device according to claim 1, wherein said adjustment screw means comprise a pair of longitudinal screws extending in a direction circumferentially of said printing cylinder, said screws being adjustably mounted upon said clamping bars to engage a wall of said axially extending recess whereby manipulation of said screws will effect movement of the end of said clamping bars upon which said screw is mounted relative to said printing cylinder in a direction extending circumferentially thereof.
Claim 10
Dependent Claim
47 words
A device according to claim 1, wherein said pin is arranged for sliding engagement within said slot in a direction extending circumferentially of said printing cylinder, with movement of said pin axially of said printing cylinder being prevented by the engagement of said pin within said slot.
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |