US5051083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plant for manufacturing a mold in the form of a multiple-impression plastic plate for reproducing intaglio printing plates
Assignee: KBA Notasys SA
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Filing: 1990-03-02
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Granted: 1991-09-24
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Expires: 2010-03-02
Abstract
Abstract The impressions are produced using an original plate (19) bearing a design by the following steps: a plastic plate (4) made of thermodeformable material is prepared and placed, in an adjusted position corresponding to the location of the first impression to be produced, between an electrode (7), the outline of which corresponds to the periphery of the design and which is surrounded by an insulating border (24), and the original plate (19) which forms a second electrode; the first impression is produced on the plastic plate (4) by high-frequency heating of the plastic plate (4) via the electrodes, and by compression; the plastic plate (4) is then cooled, the original plate (19) is separated from the plastic plate (4) that is displaced successively in the other adjusted positions corresponding to the other impressions to be produced and, in each position, the heating, compression and cooling steps are repeated in order to reproduce the next impression.
Inventors
- 👤 Antonio Coluzzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:47
CPC Classifications
B; B41; B41C; B41C3/00; B41C3/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
247 words
A plant for manufacturing a mold in the form of a multiple-impression plastic plate for reproducing intaglio printing plates, using an original plate (19) made of metal and bearing an engraved or embossed design, said plant comprising: a structure (1) provided with an electrode-carrying device (6, 8; 8, 26) for supporting a first plate electrode (7) having an edge, and with a plate-carrying device (13 to 18) for supporting said original plate (19) at a distance from and opposite to said first electrode (7); said first plate electrode (7) has an outline (7a) which corresponds to the periphery (19a) of the design (19b) of said original plate; said edge of said first electrode being surrounded by an insulating border (24), with the inside edge of said border having a shape corresponding to the shape of said outline and of a thickness equal to that of said first plate electrode; said first electrode being carried by an electrode support; said original plate (19) forming a second plate electrode, first and second electrodes being connected to a high-frequency apparatus (22); a sliding frame (3) arranged between said electrodes and being provided with means (3a) for supporting a plastic plate (4) made of deformable material, and having approximately the dimensions of said intaglio printing plate; means for effecting relative displacement between said sliding frame (3) and said electrodes in two perpendicular horizontal directions (F2 and F3); and means (11, 12) for changing the distance between said electrode-carrying and plate-carrying devices.
Claim 2
Dependent Claim
247 words
A plant for manufacturing a mold in the form of a multiple-impression plastic plate for reproducing intaglio printing plates, using an original plate (19) made of metal and bearing an engraved or embossed design, said plant comprising: a structure (1) provided with an electrode-carrying device (6, 8; 8, 26) for supporting a first plate electrode (7) having an edge, and with a plate-carrying device (13 to 18) for supporting said original plate (19) at a distance from and opposite to said first electrode (7); said first plate electrode (7) has an outline (7a) which corresponds to the periphery (19a) of the design (19b) of said original plate; said edge of said first electrode being surrounded by an insulating border (24), with the inside edge of said border having a shape corresponding to the shape of said outline and of a thickness equal to that of said first plate electrode; said first electrode being carried by an electrode support; said original plate (19) forming a second plate electrode, first and second electrodes being connected to a high-frequency apparatus (22); a sliding frame (3) arranged between said electrodes and being provided with means (3a) for supporting a plastic plate (4) made of deformable material, and having approximately the dimensions of said intaglio printing plate; means for effecting relative displacement between said sliding frame (3) and said electrodes in two perpendicular horizontal directions (F2 and F3); and means (11, 12) for changing the distance between said electrode-carrying and plate-carrying devices.
Claim 3
Dependent Claim
28 words
The plant as claimed in claim 1, wherein the first electrode (7) and said border (24) are covered by a thin insulating layer of a rigid material (27).
Claim 4
Dependent Claim
30 words
The plant as claimed in claim 1, wherein at least one of said plate-carrying and said electrode-carrying device comprises means (8, 8a, 8b; 18, 18a, 18b) for heating and cooling.
Claim 5
Dependent Claim
44 words
The plant as claimed in claim 3, wherein the plate-carrying device comprises heating and cooling means (18, 18a, 18b) consisting of a flat metal box which is in contact with said original plate (19) and which forms the second plate electrode with the latter.
Claim 6
Dependent Claim
56 words
The plant as claimed in claim 4, wherein said electrode-carrying device comprises a support saddle (5) on which said heating and cooling means (8, 8a, 8b), are arranged, and wherein said plate-carrying device (13 to 18) is provided with displacing means (11) for displacing it vertically and applying a compressive force onto said plastic plate (4).
Claim 7
Dependent Claim
49 words
The plant as claimed in claim 5, wherein said displacing means (11) consist of a double-acting jack (11) having a piston provided with a rod and wherein a supporting plate (13) carrying said box (18) with said original plate (19) is suspended from the end of said rod (12).
Claim 8
Dependent Claim
48 words
The plant as claimed in claim 6, wherein means (16, 17) enabling adjustment of the distance between the said box (18) and the supporting plate (13) integral with the rod (12) of the piston are provided, and wherein said supporting plate (13) comprises a guiding device (14, 15).
Claim 9
Dependent Claim
56 words
The plant as claimed in claim 4, wherein an assembly consisting of said original plate (19) and said box (18) is connected by a conductor (28) to said high-frequency apparatus (22), and wherein said box (18) is mounted in an insulating manner by means of an insulating plate (6') whereas said first electrode (7) is grounded.
Claim 10
Dependent Claim
87 words
The plant as claimed in claim 8, wherein an insulating support (25) carrying said first electrode (7) and said border (24) is positioned on an insulating plate (26) fixed onto a metal plate (29), the whole being preassembled by means of countersunk-head screws (30) which are flush with the surface of said first electrode, all of these elements being fixed by means for fixing onto the said box (18), and wherein said first electrode and said border are covered by a thin layer of a rigid material.
Claim 11
Dependent Claim
43 words
The plant as claimed in claim 1, wherein said electrode support (25) and said border (24) are made of one piece consisting of a plastic sheet on the surface of which a recess with the shape of the said outline has been made.
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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) | 1994-09-23 | 1995-03-25 | 1995-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-23 | 1999-03-25 | 1999-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-23 | 2003-03-25 | 2003-09-24 | $7700.00 | Window Closed / Lapsed |