EP0351504A2 - Dispositif auxiliaire électrostatique de l'impression - Google Patents
Dispositif auxiliaire électrostatique de l'impression Download PDFInfo
- Publication number
- EP0351504A2 EP0351504A2 EP89108050A EP89108050A EP0351504A2 EP 0351504 A2 EP0351504 A2 EP 0351504A2 EP 89108050 A EP89108050 A EP 89108050A EP 89108050 A EP89108050 A EP 89108050A EP 0351504 A2 EP0351504 A2 EP 0351504A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- primary coil
- bar magnets
- printing aid
- impression roller
- printing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F9/00—Rotary intaglio printing presses
- B41F9/001—Heliostatic printing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S101/00—Printing
- Y10S101/37—Printing employing electrostatic force
Definitions
- Printing aids of this type are known in a large number of embodiments. They serve to build up an electrostatic field in the printing nip between the forming roller assigned to the impression roller, in order to effect a better ink transfer to the web running in the printing nip, preferably paper web.
- the invention is therefore based on the object of simplifying a generic electrostatic printing aid according to the preamble of the main claim and in such a way that printing units can also be retrofitted therewith.
- a two-part transformer is used, the primary side of which rotates with the printing unit and the secondary side rotatably with the impression roller.
- the voltage induced in the secondary coil is rectified and smoothed using a smoothing circuit and then transferred to the metal surface of the impression roller.
- Electrical charges that are not bound to the conductor are particularly advantageous there are also no electrodes required to charge the surface of the impression roller, so that use in explosion-proof rooms in particular appears expedient.
- known printing systems can be retrofitted in a simple manner by using only a impression roller constructed according to the invention and on one end face of which the secondary coil is attached and on the axis or shaft of the impression roller, depending on whether the impression roller is driven around the axis or rigidly connected to it revolves as a shaft, the primary coil is arranged.
- the voltage effective on the secondary side can then be induced back in a simple manner, so that regulation of the induced voltage in the secondary coil is possible via this measuring transformer.
- the primary and secondary coils as well as second primary and second secondary coils can consist of a number of partial coils, each of which is wound on bar magnets, with an annoying bar magnets opposite the gap, all of which are parallel to the axis of the impression roller run, are arranged opposite to each other.
- the bar magnets assigned to the primary coil and the second primary coil are arranged at different radial distances from the axis of the impression roller, as are the secondary coil and the second secondary coil. With this arrangement, a magnetic induction is generated by the relative speed between the primary and secondary coils.
- the covering can be connected via a voltage multiplier circuit.
- the impression roller 5 in FIG. 1 has a shaft 6 on which it is arranged in a rotationally fixed manner, which rotates according to the directional arrow 7 and, as schematically arranged at 9, is grounded.
- the impression roller is constructed in the usual way in the area 8 and also has a metal covering 10 on its insulating jacket. Another conductive covering 11 is attached over the metal covering 10.
- a first receiving device Concentric to the shaft 6 of the impression roller 5, in addition to the latter, a first receiving device, generally designated as 13, as a magnetizable core with a secondary coil 14 and a second secondary coil 15 are each arranged concentrically to the shaft 6 on an end face 12.
- a further receiving device 16 concentric to the shaft 6 is a further receiving device 16 as a magnetizable core for receiving a primary coil 17, likewise concentric to the shaft 6, with the electrical connections 1 and 2 and one arranged between the latter and the shaft 6 second primary coil 18 with the electrical connections 3 and 4 arranged.
- the device 16 can be rotated with respect to the shaft 6 by means of a pin 19 which engages in an anchoring 20 which is fixed with respect to the printing unit and has on its inside a ball bearing, generally designated 21, with respect to the shaft 6, so that it can rotate, however, the magnetizable core can be held in a rotationally fixed manner with respect to the device due to the pin 19 and the anchor device 20.
- a rectifier circuit 22 and a smoothing circuit 23 are also provided on the secondary side of the first receiving device 13, and their output is connected to the metal coating 10.
- connection 2 of the primary coil 17 is grounded, whereas the connection 1 is connected to a high-voltage generator 30 with a variable AC voltage and a frequency of preferably 10 kHz.
- the AC voltage source 30 is grounded with a connection 31.
- the two electrical connections 3 and 4 of the second primary coil 18 are connected to the inputs of a controller 32 of the variable AC voltage source 30 and can change their size of the output voltage and / or their frequency - in a manner known per se.
- the secondary coil 14 is grounded on one side, as is schematically designated by "9" in FIG. The same applies to the second secondary coil 15. Both secondary coils 14, 15 are connected in parallel.
- a rectifier circuit 22 for rectifying the alternating current is initially arranged downstream of both coils. Behind the rectifier circuit 22 is a smoothing circuit 23 downstream with an LC filter, as is known per se. The output of the smoothing circuit 23 is connected to the metal coating 10 of the impression roller 5.
- the primary coil 17 and the secondary coil 14 are moved towards each other. Via the air gap between the two magnetizable cores 13 and 16, the alternating voltage in the primary coil 17 can induce a secondary voltage in the secondary coil 14, which is rectified via the rectifier circuit 22 and smoothed and smoothed and in this form fed directly to the metal coating 11.
- the induced voltage of the secondary coil 14 is taken off by the second secondary coil 15 and induced on the second primary coil 18 in the opposite sense, which is connected to the controller 32 with its electrical connections 3 and 4. This controls the AC voltage source 30 such that, for example, the same DC voltage is always applied to the metal coating 10.
- 40 represents the magnetic circuit for energy transmission.
- 41 is the magnetic circuit for the transmitter.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Printing Methods (AREA)
- Photoreceptors In Electrophotography (AREA)
- Rotary Presses (AREA)
- Developing Agents For Electrophotography (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Coils Of Transformers For General Uses (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT89108050T ATE77790T1 (de) | 1988-07-20 | 1989-05-03 | Elektrostatische druckhilfe. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3824714 | 1988-07-20 | ||
DE3824714A DE3824714C1 (fr) | 1988-07-20 | 1988-07-20 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0351504A2 true EP0351504A2 (fr) | 1990-01-24 |
EP0351504A3 EP0351504A3 (en) | 1990-03-21 |
EP0351504B1 EP0351504B1 (fr) | 1992-07-01 |
Family
ID=6359180
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89108050A Expired - Lifetime EP0351504B1 (fr) | 1988-07-20 | 1989-05-03 | Dispositif auxiliaire électrostatique de l'impression |
Country Status (5)
Country | Link |
---|---|
US (1) | US5044275A (fr) |
EP (1) | EP0351504B1 (fr) |
JP (1) | JP2526289B2 (fr) |
AT (1) | ATE77790T1 (fr) |
DE (2) | DE3824714C1 (fr) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2677301A1 (fr) * | 1991-06-05 | 1992-12-11 | Mira Sarl | Dispositif d'assistance electrostatique pour machine d'impression notamment a heliogravure. |
DE4443368A1 (de) * | 1994-12-06 | 1996-06-13 | Pogatzki Volkmar W Dr | Rotationstiefdruckwerk mit spannungsbeaufschlagtem Presseur |
US6578478B2 (en) | 1997-11-27 | 2003-06-17 | Spengler Electronic Ag | Electrostatic arrangement for rotogravure and flexographic printing unit |
DE102008006269B3 (de) * | 2008-01-25 | 2009-05-14 | Eltex-Elektrostatik Gmbh | Presseur sowie dessen Verwendung |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5178071A (en) * | 1992-01-23 | 1993-01-12 | American Roller Company | Impression roller and method of preparation |
DE9218818U1 (de) * | 1992-02-18 | 1995-08-31 | Eltex-Elektrostatik Gmbh, 79576 Weil Am Rhein | Presseur |
DE4408615C2 (de) * | 1994-03-15 | 1996-01-11 | Roland Man Druckmasch | Näpfchenwalze innerhalb eines Auftragswerks einer Rotationsdruckmaschine |
US6314879B1 (en) * | 1999-05-12 | 2001-11-13 | Hurletron Incorporated | Flexographic printing apparatus |
US6644196B2 (en) * | 2001-11-05 | 2003-11-11 | Heidelberger Druckmaschinen Ag | Electrorheological inker |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4099462A (en) * | 1973-06-25 | 1978-07-11 | Hurletron Altair, Inc. | Alternating current energized printing system utilizing a dielectric covered resilient impression roller |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2558900A (en) * | 1945-03-26 | 1951-07-03 | William C Huebner | Electrostatic printing method and apparatus |
US2547706A (en) * | 1945-08-06 | 1951-04-03 | Selective discharge control for inks | |
US3370546A (en) * | 1964-06-05 | 1968-02-27 | Agfa Ag | Selective printing machine employing magnetic fields |
GB1169566A (en) * | 1966-11-24 | 1969-11-05 | Crosfield Electronics Ltd | Improvements relating to Printing Processes and Apparatus |
US3661081A (en) * | 1968-11-01 | 1972-05-09 | Hurletron Controls Division | Process of flexographic printing utilizing an electrical field |
CH619400A5 (fr) * | 1977-03-25 | 1980-09-30 | Franz Knopf | |
DE3302091A1 (de) * | 1982-03-25 | 1983-10-13 | Sulzer-Escher Wyss AG, 8023 Zürich | Druckwalze einer rotationsdruckmaschine |
GB2141973B (en) * | 1983-02-07 | 1986-03-19 | Gravure Res Inst | Improved method and apparatus for direct charging of the surface of an impression roll of an electrostatic assist gravure press |
DE3314454C2 (de) * | 1983-04-21 | 1985-05-30 | Albert-Frankenthal Ag, 6710 Frankenthal | Presseur einer Tiefdruckmaschine |
-
1988
- 1988-07-20 DE DE3824714A patent/DE3824714C1/de not_active Expired - Fee Related
-
1989
- 1989-05-03 DE DE8989108050T patent/DE58901766D1/de not_active Expired - Lifetime
- 1989-05-03 EP EP89108050A patent/EP0351504B1/fr not_active Expired - Lifetime
- 1989-05-03 AT AT89108050T patent/ATE77790T1/de not_active IP Right Cessation
- 1989-07-10 JP JP1178882A patent/JP2526289B2/ja not_active Expired - Lifetime
- 1989-07-19 US US07/381,975 patent/US5044275A/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4099462A (en) * | 1973-06-25 | 1978-07-11 | Hurletron Altair, Inc. | Alternating current energized printing system utilizing a dielectric covered resilient impression roller |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2677301A1 (fr) * | 1991-06-05 | 1992-12-11 | Mira Sarl | Dispositif d'assistance electrostatique pour machine d'impression notamment a heliogravure. |
DE4443368A1 (de) * | 1994-12-06 | 1996-06-13 | Pogatzki Volkmar W Dr | Rotationstiefdruckwerk mit spannungsbeaufschlagtem Presseur |
US6578478B2 (en) | 1997-11-27 | 2003-06-17 | Spengler Electronic Ag | Electrostatic arrangement for rotogravure and flexographic printing unit |
DE102008006269B3 (de) * | 2008-01-25 | 2009-05-14 | Eltex-Elektrostatik Gmbh | Presseur sowie dessen Verwendung |
US8444538B2 (en) | 2008-01-25 | 2013-05-21 | Illinois Tool Works, Inc. | Impression roller and use of the same |
Also Published As
Publication number | Publication date |
---|---|
ATE77790T1 (de) | 1992-07-15 |
US5044275A (en) | 1991-09-03 |
EP0351504A3 (en) | 1990-03-21 |
DE3824714C1 (fr) | 1990-04-12 |
JPH02117832A (ja) | 1990-05-02 |
JP2526289B2 (ja) | 1996-08-21 |
DE58901766D1 (de) | 1992-08-06 |
EP0351504B1 (fr) | 1992-07-01 |
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