US3824928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible printing plate locking device for rotary printing press
Assignee: Roland Offsetmaschinenfabrik Faber and Schleicher AG
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Filing: 1973-04-27
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Granted: 1974-07-23
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Expires: 1993-04-27
Abstract
Abstract A plate lock-up mechanism including first and second jaw members in the form of a sleeve and shaft telescoped together, each having longitudinally and radially extending jaws and with the sleeve being provided with a longitudinal clearance slot. A clamping screw is provided at the end of the sleeve for imparting relative rocking motion to the shaft so as to grip the end of a plate inserted between the jaws. The sleeve, moreover, has a jack screw at its end for rocking the entire jaw assembly for tensioning and peripherally positioning the plate. In the preferred embodiment the sleeve has an extension in the form of a collar for mounting the clamping screw and jack screw. To adjust the axial position of the jaws and plate, the sleeve and collar are mounted for axial sliding movement in the cylinder, and an axially oriented adjusting screw is interposed between the collar and the cylinder for endwise crowding of the collar in one direction or the other. To establish a nominal position of peripheral register, the collar is provided with an eccentrically located stop screw and the cylinder is provided with a stop member in the path of rocking movement of the stop screw. The stop member is rotatable and has stop surfaces in the form of facets of different radial dimension which are selectively interposeable. Auxiliary jaw members are mounted coaxially with respect to the main jaw members and have respective axially facing keyed connections therewith which may be engaged to extend the effective width of the jaw thereby to accommodate plates of different width.
Inventors
- 👤 K Langer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:25
CPC Classifications
B; B41; B41F; B41F27/00; B41F27/12; B41F27/1218; B41F27/1225; B41F27/1243
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
186 words
A plate locking device for clamping flexible printing plates on a plate cylinder of a rotary printing press, the combination comprising a first jaw member formed of a hollow cylindrical sleeve and radially projecting jaw extending therealong, the sleeve having a longitudinal clearance slot extending adjacent to the jaw, a second jaw member having a shaft and a radially projecting jaw extending therealong, the shaft of the second jaw member being snugly telescoped into the sleeve and with the jaw thereof extending through the clearance slot to form a jaw assembly in which the jaws are relatively swingable toward one another about a central axis for reception of the bent-over end of a printing plate, means at the adjacent ends of the jaw members for imparting relative rocking movement to apply clamping pressure between the jaws so as to positively grip the end of the plate, the sleeve being telescoped into an undercut cylindrical groove formed in the surface of the cylinder, and means for rocking the jaw assembly as a unit with respect to the cylinder thereby to tension and peripherally position the gripped plate.
Claim 2
Dependent Claim
186 words
A plate locking device for clamping flexible printing plates on a plate cylinder of a rotary printing press, the combination comprising a first jaw member formed of a hollow cylindrical sleeve and radially projecting jaw extending therealong, the sleeve having a longitudinal clearance slot extending adjacent to the jaw, a second jaw member having a shaft and a radially projecting jaw extending therealong, the shaft of the second jaw member being snugly telescoped into the sleeve and with the jaw thereof extending through the clearance slot to form a jaw assembly in which the jaws are relatively swingable toward one another about a central axis for reception of the bent-over end of a printing plate, means at the adjacent ends of the jaw members for imparting relative rocking movement to apply clamping pressure between the jaws so as to positively grip the end of the plate, the sleeve being telescoped into an undercut cylindrical groove formed in the surface of the cylinder, and means for rocking the jaw assembly as a unit with respect to the cylinder thereby to tension and peripherally position the gripped plate.
Claim 3
Dependent Claim
48 words
The combination as claimed in claim 1 in which the jaws are integrally formed with the sleeve and shaft respectively and in which the jaws are each of tapering spade-like construction presenting opposed flat faces to provide extensive face-to-face engagement with the bent-over end portion of the plate.
Claim 4
Dependent Claim
218 words
A plate locking device for clamping flexible printing plates on a plate cylinder of a rotary printing press, the combination comprising a first jaw member formed of a hollow cylindrical sleeve and radially projecting jaw extending therealong, the sleeve having a longitudinal clearance slot extending adjacent to the jaw, a second jaw member having a shaft and a radially projecting jaw extending therealong, the shaft of the second jaw member being snugly telescoped into the sleeve and with the jaw thereof extending through the clearance slot to form a jaw assembly in which the jaws are relatively swingable toward one another about a central axis for reception of the bent-over end of a printing plate, a collar secured to the end of the sleeve, a shaft extension secured to the end of the shaft and extending through the collar, the collar having an eccentric clamping screw and the shaft extension having an arm formed thereon engaged by the screw so that when the screw is turned the sleeve and shaft are rocked relative to one another to positively grip the end of the plate, said collar further having a jack screw which engages the cylinder for rocking the entire jaw assembly as a unit with respect to the cylinder thereby to rension and peripherally position the gripped plate.
Claim 5
Dependent Claim
218 words
A plate locking device for clamping flexible printing plates on a plate cylinder of a rotary printing press, the combination comprising a first jaw member formed of a hollow cylindrical sleeve and radially projecting jaw extending therealong, the sleeve having a longitudinal clearance slot extending adjacent to the jaw, a second jaw member having a shaft and a radially projecting jaw extending therealong, the shaft of the second jaw member being snugly telescoped into the sleeve and with the jaw thereof extending through the clearance slot to form a jaw assembly in which the jaws are relatively swingable toward one another about a central axis for reception of the bent-over end of a printing plate, a collar secured to the end of the sleeve, a shaft extension secured to the end of the shaft and extending through the collar, the collar having an eccentric clamping screw and the shaft extension having an arm formed thereon engaged by the screw so that when the screw is turned the sleeve and shaft are rocked relative to one another to positively grip the end of the plate, said collar further having a jack screw which engages the cylinder for rocking the entire jaw assembly as a unit with respect to the cylinder thereby to rension and peripherally position the gripped plate.
Claim 6
Dependent Claim
55 words
The combination as claimed in claim 3 in which the jaw assembly is mounted in the cylinder for movement in the axial direction and in which an adjusting screw is interposed between the collar and the cylinder for adjusting the axial position of the sleeve and hence the axial position of the jaws and plate.
Claim 7
Dependent Claim
90 words
The combination as claimed in claim 3 in which the jaws have opposing flat faces and in which there is extending from one of the faces a registering pin for registering with an opening formed in the end of the plate, the remaining face being recessed for clearance of the pin when the jaws are in clamping position, and means including an axially extending adjusting screw interposed between the collar and the cylinder for adjusting the axial position of the jaw assembly and hence the axial position of the plate.
Claim 8
Dependent Claim
238 words
A plate cylinder assembly for a printing press comprising, in combination, a cylinder, first and second jaw assemblies, each of the assemblies consisting of a sleeve having a longitudinally extending jaw and longitudinally extending clearance slot running adjacent thereto as well as a shaft telescoped within the sleeve and having a longitudinally extending jaw extending through the clearance slot so that the jaws are relatively swingable toward one another about a central axis, the jaws presenting opposed flat faces to provide extensive face-to-face engagement with the bent-over end portion of a flexible printing plate, the jaw assemblies being spaced end to end in an undercut axially-extending recess formed in the cylinder, means at the respective ends of the cylinder for clamping and adjusting the adjacent jaw assembly rockably with respect to the cylinder, an auxiliary jaw assembly formed of a pair of jaws of relatively narrow axial extent interposed between the spaced ends of the first and second jaw assemblies, the auxiliary jaw assembly being mounted in the recess coaxially with respect to the first and second jaw assemblies and with the jaws thereon having alternative keyed connections with corresponding ones of the jaws in the first and second jaw assemblies thereby permitting the auxiliary jaw assembly upon being slid endwise in the recess to engage and augment a selected one of the first and second jaw assemblies for accommodation therein of plates of greater than standard width.
Claim 9
Dependent Claim
238 words
A plate cylinder assembly for a printing press comprising, in combination, a cylinder, first and second jaw assemblies, each of the assemblies consisting of a sleeve having a longitudinally extending jaw and longitudinally extending clearance slot running adjacent thereto as well as a shaft telescoped within the sleeve and having a longitudinally extending jaw extending through the clearance slot so that the jaws are relatively swingable toward one another about a central axis, the jaws presenting opposed flat faces to provide extensive face-to-face engagement with the bent-over end portion of a flexible printing plate, the jaw assemblies being spaced end to end in an undercut axially-extending recess formed in the cylinder, means at the respective ends of the cylinder for clamping and adjusting the adjacent jaw assembly rockably with respect to the cylinder, an auxiliary jaw assembly formed of a pair of jaws of relatively narrow axial extent interposed between the spaced ends of the first and second jaw assemblies, the auxiliary jaw assembly being mounted in the recess coaxially with respect to the first and second jaw assemblies and with the jaws thereon having alternative keyed connections with corresponding ones of the jaws in the first and second jaw assemblies thereby permitting the auxiliary jaw assembly upon being slid endwise in the recess to engage and augment a selected one of the first and second jaw assemblies for accommodation therein of plates of greater than standard width.
Claim 10
Dependent Claim
199 words
In a plate locking device for clamping flexible printing plAtes on a plate cylinder of a rotary printing press, the combination comprising a clamping jaw member having a shaft and radially projecting jaw extending therealong, a tensioning jaw member formed of a hollow cylindrical sleeve and having a radially projecting jaw extending therealong, the sleeve having a longitudinal clearance slot extending adjacent to the jaw, the clamping jaw member being telescoped within the sleeve with the jaw thereon extending through the clearance slot to form a jaw assembly in which the jaws are relatively swingable toward one another about a central axis for reception of the bent-over end of a printing plate, the sleeve having means at its end in the form of an eccentrically mounted clamping screw for imparting relative rocking movement to the jaws so as to positively grip the end of the plate, the sleeve further having an eccentrically mounted jack screw for bearing against the cylinder for rocking the entire jaw assembly with respect to the cylinder to tension and position the plate, said sleeve further having an eccentric stop having a cooperating stop surface on the cylinder, the stop having means for relative adjustment.
Claim 11
Dependent Claim
199 words
In a plate locking device for clamping flexible printing plAtes on a plate cylinder of a rotary printing press, the combination comprising a clamping jaw member having a shaft and radially projecting jaw extending therealong, a tensioning jaw member formed of a hollow cylindrical sleeve and having a radially projecting jaw extending therealong, the sleeve having a longitudinal clearance slot extending adjacent to the jaw, the clamping jaw member being telescoped within the sleeve with the jaw thereon extending through the clearance slot to form a jaw assembly in which the jaws are relatively swingable toward one another about a central axis for reception of the bent-over end of a printing plate, the sleeve having means at its end in the form of an eccentrically mounted clamping screw for imparting relative rocking movement to the jaws so as to positively grip the end of the plate, the sleeve further having an eccentrically mounted jack screw for bearing against the cylinder for rocking the entire jaw assembly with respect to the cylinder to tension and position the plate, said sleeve further having an eccentric stop having a cooperating stop surface on the cylinder, the stop having means for relative adjustment.
Claim 12
Dependent Claim
60 words
The combination as claimed in claim 7 in which the stop is in the form of an adjustable screw and in which the stop surface is mounted upon a shiftable stop member which is so arranged as to permit movement of the stop surface out of the path of movement of the stop screw after adjustment has been initially effected.
Claim 13
Dependent Claim
51 words
The combination as claimed in claim 7 in which a rotatable stop member is provided on the cylinder having a plurality of stop surfaces thereon, the stop member being movable so as to selectively interpose one of the stop surfaces in the path of movement of the stop on the sleeve.
Claim 14
Dependent Claim
265 words
A plate locking device for clamping flexible printing plates on a plate cylinder of a rotary printing press the combination comprising, a clamping jaw member formed of a shaft having a radially projecting jaw extending therealong, a tensioning jaw member in the form of a hollow cylindrical sleeve having a radially projecting jaw extending therealong and with a longitudinal clearance slot extending adjacent to such jaw, the shaft being telescoped into the sleeve with its jaw extending through the clearance slot to form a jaw assembly in which the jaws are relatively swingable toward one another about a central axis for reception of the bent-over end of a printing plate, an auxiliary clamping jaw member having a radially projecting auxiliary jaw of narrow axial width, an auxiliary tensioning jaw member having a radially projecting auxiliary jaw of corresponding width, the auxiliary jaw members being coaxial with respect to the clamping and tensioning jaw members and having respective axially engageable keyed connections therewith so as to permit the jaws to be used with plates of different axial width depending whether the keyed connections are engaged or disengaged, the jaw members being telescoped into an undercut cylindrical groove formed in the surface of the cylinder with the end portions of the sleeve and shaft exposed at the end of the cylinder, means at the exposed ends for imparting relative rocking movement to apply clamping pressure between the jaws so as to positively grip the end of the plate, and means for rocking the sleeve with respect to the cylinder thereby to tension and peripherally position the plate.
Claim 15
Dependent Claim
265 words
A plate locking device for clamping flexible printing plates on a plate cylinder of a rotary printing press the combination comprising, a clamping jaw member formed of a shaft having a radially projecting jaw extending therealong, a tensioning jaw member in the form of a hollow cylindrical sleeve having a radially projecting jaw extending therealong and with a longitudinal clearance slot extending adjacent to such jaw, the shaft being telescoped into the sleeve with its jaw extending through the clearance slot to form a jaw assembly in which the jaws are relatively swingable toward one another about a central axis for reception of the bent-over end of a printing plate, an auxiliary clamping jaw member having a radially projecting auxiliary jaw of narrow axial width, an auxiliary tensioning jaw member having a radially projecting auxiliary jaw of corresponding width, the auxiliary jaw members being coaxial with respect to the clamping and tensioning jaw members and having respective axially engageable keyed connections therewith so as to permit the jaws to be used with plates of different axial width depending whether the keyed connections are engaged or disengaged, the jaw members being telescoped into an undercut cylindrical groove formed in the surface of the cylinder with the end portions of the sleeve and shaft exposed at the end of the cylinder, means at the exposed ends for imparting relative rocking movement to apply clamping pressure between the jaws so as to positively grip the end of the plate, and means for rocking the sleeve with respect to the cylinder thereby to tension and peripherally position the plate.
Claim 16
Dependent Claim
32 words
The combination as claimed in claim 10 in which the axially-facing keyed connection is in the form of axially-extending pins arranged for engagement with axially-extending bores respectively formed in the connected members.
Claim 17
Dependent Claim
207 words
A plate cylinder assembly for a printing press comprising, in combination, a cylinder, first and second jaw assemblies, each of the assemblies consisting of a sleeve having a longitudinally extending jaw and longitudinally extending clearance slot running adjacent thereto, as well as a shaft telescoped within the sleeve and having a longitudinally extending jaw extendiNg through the clearance slot so that the jaws are relatively swingable toward one another about a central axis, the jaws being tapered and spade-like presenting opposed flat faces to provide extensive face-to-face engagement with the bent-over end portion of a flexible printing plate, the jaw assemblies being spaced side by side in an undercut axially-extending recess formed in the clyinder and in mirror image to one another for respectively engaging a plate leading edge and a plate trailing edge, means at the end of the cylinder for clamping the opposed jaws together and for adjusting each jaw assembly rockably and axially with respect to the cylinder, the recess in the cylinder having a cross section in the form of a symmetrical triangle communicating with symmetrically arranged longitudinally extending cylindrical bores extending lengthwise of the cylinder and with the sleeves being snugly telescoped in the respective bores for combined rocking and axial movement.
Claim 18
Dependent Claim
207 words
A plate cylinder assembly for a printing press comprising, in combination, a cylinder, first and second jaw assemblies, each of the assemblies consisting of a sleeve having a longitudinally extending jaw and longitudinally extending clearance slot running adjacent thereto, as well as a shaft telescoped within the sleeve and having a longitudinally extending jaw extendiNg through the clearance slot so that the jaws are relatively swingable toward one another about a central axis, the jaws being tapered and spade-like presenting opposed flat faces to provide extensive face-to-face engagement with the bent-over end portion of a flexible printing plate, the jaw assemblies being spaced side by side in an undercut axially-extending recess formed in the clyinder and in mirror image to one another for respectively engaging a plate leading edge and a plate trailing edge, means at the end of the cylinder for clamping the opposed jaws together and for adjusting each jaw assembly rockably and axially with respect to the cylinder, the recess in the cylinder having a cross section in the form of a symmetrical triangle communicating with symmetrically arranged longitudinally extending cylindrical bores extending lengthwise of the cylinder and with the sleeves being snugly telescoped in the respective bores for combined rocking and axial movement.
Claim 19
Dependent Claim
226 words
A plate cylinder assembly for a printing press comprising, in combination, a cylinder, first and second jaw assemblies, each of the assemblies consisting of a sleeve having a longitudinally extending jaw and longitudinally extending clearance slot running adjacent thereto as well as a shaft telescoped within the sleeve and having a longitudinally extending jaw extending through the clearance slot so that the jaws are relatively swingable toward one another about a central axis, the jaws being tapered and spade-like presenting opposed flat faces to provide extensive face-to-face engagement with the bent-over end portion of a flexible printing plate, the jaw assemblies being mounted side by side in an undercut axially extending recess formed in the cylinder and in mirror image to one another for respectively engaging a plate leading edge and a plate trailing edge, means at the end of the cylinder for clamping the opposed jaws together and for adjusting each jaw assembly rockably with respect to the cylinder, the recess in the cylinder having a cross section which is generally triangular communicating with symmetrically arranged longitudinally extending cylindrical bores extending lengthwise of the cylinder and with the sleeves being snugly telescoped in the respective bores, and a stop member at the end of the cylinder centered between the jaw assemblies and cooperating with the sleeves for limiting the rocking movement of each of them.
Claim 20
Dependent Claim
226 words
A plate cylinder assembly for a printing press comprising, in combination, a cylinder, first and second jaw assemblies, each of the assemblies consisting of a sleeve having a longitudinally extending jaw and longitudinally extending clearance slot running adjacent thereto as well as a shaft telescoped within the sleeve and having a longitudinally extending jaw extending through the clearance slot so that the jaws are relatively swingable toward one another about a central axis, the jaws being tapered and spade-like presenting opposed flat faces to provide extensive face-to-face engagement with the bent-over end portion of a flexible printing plate, the jaw assemblies being mounted side by side in an undercut axially extending recess formed in the cylinder and in mirror image to one another for respectively engaging a plate leading edge and a plate trailing edge, means at the end of the cylinder for clamping the opposed jaws together and for adjusting each jaw assembly rockably with respect to the cylinder, the recess in the cylinder having a cross section which is generally triangular communicating with symmetrically arranged longitudinally extending cylindrical bores extending lengthwise of the cylinder and with the sleeves being snugly telescoped in the respective bores, and a stop member at the end of the cylinder centered between the jaw assemblies and cooperating with the sleeves for limiting the rocking movement of each of them.
Claim 21
Dependent Claim
46 words
The combination as claimed in claim 13 in which the stop member is in the form of an axially oriented member having symmetrically faceted stop surfaces and which is rotatable to present facets of different radius to limit the rocking movement of each of the sleeves.
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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |