Patent US3793952A successfully refreshed from Google Patents.
US3793952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Convertible printing mechanism for intaglio and flexographic printing
Assignee: Windmoeller and Hoelscher KG
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Filing: 1972-07-25
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Granted: 1974-02-26
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Expires: 1992-07-25
Abstract
Abstract A printing mechanism for printing presses is adapted to be converted from intaglio to flexographic printing and vice versa by providing a lifting platform below a replaceable plate cylinder. The platform supports a liftable ink trough, a displaceable frame for a screen cylinder, and a displaceable doctor device. A selected one of at least two impression cylinders supported in a mounting can be applied to the plate cylinder depending on whether a resilient surface is required for the impression cylinder for intaglio printing or a steel surface for flexographic printing.
Inventors
- 👤 R Neumann
- 👤 R Heidenmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:58
CPC Classifications
B; B41; B41F; B41F11/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
320 words
A printing mechanism for a printing press adapted to be converted from intaglio to flexographic printing and visa versa, said printing mechanism comprising: a press frame; a replaceable plate cylinder mounted at a fixed location in said frame; a working platform disposed beneath said plate cylinder and having a horizOntal table surface, said working platform movably mounted in said frame; means for moving said working platform towards and away from said plate cylinder; at least one horizontally positioned guide member on said working platform; a frame element movably mounted on said guide; a screen cylinder mounted on said frame element such that its axis is parallel to the axis of said plate cylinder, said frame element serving to horizontally move said screen cylinder into and out of association with said plate cylinder so that when said screen cylinder is in association with said plate cylinder the rim of said screen cylinder engages the rim of said plate cylinder; a doctor device mounted on said guide for horizontal movement to either side of said plate cylinder; a doctor blade mounted on said doctor device parallel to the axis of said plate cylinder; means for locking said doctor device in a predetermined position on said guide; an ink trough movably mounted on said working platform in such a way that the longitudinal center line of said ink trough is parallel to the axis of said plate cylinder; means for moving said ink trough between said plate cylinder and said working platform; a first impression cylinder having a resilient surface for intaglio printing movably mounted with respect to said frame; a second impression cylinder having a steel surface for flexographic printing movably mounted with respect to said frame; and bracket means movably mounted on said frame and carrying said impression cylinders for interchangeably positioning said impression cylinders so that the rim of one of said cylinders engages the rim of said plate cylinder.
Claim 2
Dependent Claim
320 words
A printing mechanism for a printing press adapted to be converted from intaglio to flexographic printing and visa versa, said printing mechanism comprising: a press frame; a replaceable plate cylinder mounted at a fixed location in said frame; a working platform disposed beneath said plate cylinder and having a horizOntal table surface, said working platform movably mounted in said frame; means for moving said working platform towards and away from said plate cylinder; at least one horizontally positioned guide member on said working platform; a frame element movably mounted on said guide; a screen cylinder mounted on said frame element such that its axis is parallel to the axis of said plate cylinder, said frame element serving to horizontally move said screen cylinder into and out of association with said plate cylinder so that when said screen cylinder is in association with said plate cylinder the rim of said screen cylinder engages the rim of said plate cylinder; a doctor device mounted on said guide for horizontal movement to either side of said plate cylinder; a doctor blade mounted on said doctor device parallel to the axis of said plate cylinder; means for locking said doctor device in a predetermined position on said guide; an ink trough movably mounted on said working platform in such a way that the longitudinal center line of said ink trough is parallel to the axis of said plate cylinder; means for moving said ink trough between said plate cylinder and said working platform; a first impression cylinder having a resilient surface for intaglio printing movably mounted with respect to said frame; a second impression cylinder having a steel surface for flexographic printing movably mounted with respect to said frame; and bracket means movably mounted on said frame and carrying said impression cylinders for interchangeably positioning said impression cylinders so that the rim of one of said cylinders engages the rim of said plate cylinder.
Claim 3
Dependent Claim
13 words
A printing mechanism according to claim 1 including two parallel and horizontal guides.
Claim 4
Dependent Claim
86 words
A printing mechanism according to claim 1 wherein said ink trough is vertically movable, and further wherein said guide is mounted on said working platform and said frame element is sized, shaped and mounted on said guide in such a way that said screen cylinder is horizontally movable between a first position in which its axis lies in the plane defined by and is parallel to the axis of said plate cylinder and the centerline of said ink trough and a second position horizontally spaced therefrom.
Claim 5
Dependent Claim
31 words
A printing mechanism according to claim 1 further comprising an auxiliary platform which is displaceable transversely to said working platform and receives said screen cylinder when not required during intaglio printing.
Claim 6
Dependent Claim
28 words
A printing mechanism according to claim 1 wherein said doctor device comprises a carriage permitting selective mounting of a doctor blade at either longitudinal side of the carriage.
Claim 7
Dependent Claim
63 words
A printing mechanism according to claim 1, wherein said impression cylinders are carried by a common turret mounted for rotation on a shaft which is parallel to a rotary shaft of said plate cylinder, said turret shaft being displaceaBle to and from said plate cylinder and being adapted to have engaged therewith means for pressing the selected impression cylinder against the plate cylinder.
Claim 8
Dependent Claim
34 words
A printing mechanism according to claim 1 further including drive means attached to said doctor device for adjusting the position of said doctor device with respect to the table surface of said working platform.
Claim 9
Dependent Claim
15 words
A printing mechanism according to claim 7 wherein said drive means is a lifting device.
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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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |