US3658002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clamping device for clamping a printing plate upon a cylinder of a printing press
Assignee: Roland Offsetmaschinenfabrik Faber and Schleicher AG
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Filing: 1970-04-15
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Granted: 1972-04-25
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Expires: 1990-04-15
Abstract
Abstract A device for clamping a printing plate to a cylinder such as the form cylinder of a printing press or similar machine permits convenient and rapid pivotal mounting of the clamping jaw to the tensioning bar of the device and an equally convenient and rapid release therefrom. For this purpose, the jaw and the tensioning bar are hinged to each other by a plurality of lengthwise spaced bearing elements and these elements engage each other in one axial position of the jaw and the bar relative to each other while in another axial position the bearing elements on the jaw face the spaces between the bearing elements on the bar whereby the jaw can be released from the bar by lifting it in radial direction. Mounting of the clamping jaw on the bar is effected by reversing the described relative displacement of the jaw and the bar.
Inventors
- 👤 Friedrich Preuss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:58
CPC Classifications
B; B41; B41F; B41F27/00; B41F27/12; B41F27/1218; B41F27/1225; B41F27/1231
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
228 words
A clamping device for clamping a printing plate upon a printing press cylinder having an axially elongate groove in its peripheral wall, said clamping device comprising in combination: an elongate tensioning member; mounting means for mounting said tensioning member lengthwise within the groove of the cylinder so as to permit displacement of said member in circumferential direction in said groove; an elongate axially displaceable clamping jaw member; hinge means supporting said jaw member on the tensioning member parallel therewith for selectively pivoting said jaw member into and out of a pivotal position in which a printing plate end is clamped between said members, said hinge means including a plurality of axially spaced bearing elements supported by the tensioning member and a corresponding plurality of axially spaced bearing elements supported on the jaw member, a first axial displacement of the jaw member moving the bearing elements on said member into registry with the spaces between the bearing elements on the tensioning member, a subsequent circumferential displacement of the tensioning member, with the bearing elements on the jaw member in said position of registry, moving the bearing elements on the tensioning member into lengthwise alignment with the bearing elements on the jaw member and a second axial displacement of the jaw member moving the bearing elements on said member into hinging relationship with the bearing elements on the tensioning member.
Claim 2
Dependent Claim
228 words
A clamping device for clamping a printing plate upon a printing press cylinder having an axially elongate groove in its peripheral wall, said clamping device comprising in combination: an elongate tensioning member; mounting means for mounting said tensioning member lengthwise within the groove of the cylinder so as to permit displacement of said member in circumferential direction in said groove; an elongate axially displaceable clamping jaw member; hinge means supporting said jaw member on the tensioning member parallel therewith for selectively pivoting said jaw member into and out of a pivotal position in which a printing plate end is clamped between said members, said hinge means including a plurality of axially spaced bearing elements supported by the tensioning member and a corresponding plurality of axially spaced bearing elements supported on the jaw member, a first axial displacement of the jaw member moving the bearing elements on said member into registry with the spaces between the bearing elements on the tensioning member, a subsequent circumferential displacement of the tensioning member, with the bearing elements on the jaw member in said position of registry, moving the bearing elements on the tensioning member into lengthwise alignment with the bearing elements on the jaw member and a second axial displacement of the jaw member moving the bearing elements on said member into hinging relationship with the bearing elements on the tensioning member.
Claim 3
Dependent Claim
17 words
The device according to claim 1 wherein said bearing elements are in the form of engageable hooks.
Claim 4
Dependent Claim
54 words
The device according to claim 1 wherein the spaces between adjacent bearing elements on one of said members are axially wider than the axial length of the bearing eleMents on the other of said members to facilitate placement of the bearing elements on one member in registry with the spaces on the other member.
Claim 5
Dependent Claim
17 words
The device according to claim 3 wherein said axially wider spaces are provided at the tensioning member.
Claim 6
Dependent Claim
84 words
The device according to claim 1 and comprising actuating means for selectively pivoting the jaw member into either one of said pivotal positions, said actuating means including an elongate eccentric member interposed between the tensioning member and the jaw member, said eccentric member being rotatable about its axis and in engagement with said members whereby rotation of said eccentric member pivots the jaw member into and out of its clamping position respectively and retains the jaw member in the selected one of said positions.
Claim 7
Dependent Claim
109 words
The device according to claim 1 wherein said tensioning member comprises a yielding axially elongate portion engageable with the printing plate and to be clamped and disposed juxtaposed to the clamping jaw member, and wherein a bar of polygonal cross section is interposed in a gap between said yielding portion and a rigid portion of the tensioning member, said bar in response to a circumferential displacement of the tensioning member being tilted about its axis into an angular position in which the effective cross section width of the bar with respect to said gap is increased, thereby pressing said yielding portion of the tensioning member toward said jaw member.
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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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |