EP0351504A2 - Dispositif auxiliaire électrostatique de l'impression - Google Patents

Dispositif auxiliaire électrostatique de l'impression Download PDF

Info

Publication number: EP0351504A2
Authority: EP; European Patent Office
Prior art keywords: primary coil; bar magnets; printing aid; impression roller; printing
Prior art date: 1988-07-20
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

Application number

EP89108050A

Other languages

German (de)

English (en)

Other versions

EP0351504A3 (en

EP0351504B1 (fr

Inventor

Franz Knopf

Ernst A. Hahne

Hermann Künzig

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Eltex Elektrostatik GmbH

Original Assignee

Eltex Elektrostatik GmbH

Priority date (The priority date 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 date listed.)

1988-07-20

Filing date

1989-05-03

Publication date

1990-01-24

1989-05-03 Application filed by Eltex Elektrostatik GmbH filed Critical Eltex Elektrostatik GmbH

1989-05-03 Priority to AT89108050T priority Critical patent/ATE77790T1/de

1990-01-24 Publication of EP0351504A2 publication Critical patent/EP0351504A2/fr

1990-03-21 Publication of EP0351504A3 publication Critical patent/EP0351504A3/de

1992-07-01 Application granted granted Critical

1992-07-01 Publication of EP0351504B1 publication Critical patent/EP0351504B1/fr

2009-05-03 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

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)

EP89108050A 1988-07-20 1989-05-03 Dispositif auxiliaire électrostatique de l'impression Expired - Lifetime EP0351504B1 (fr)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Legal Events

Date	Code	Title	Description
1989-12-09	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
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1991-12-04	17Q	First examination report despatched	Effective date: 19911017
1992-02-05	ITF	It: translation for a ep patent filed	Owner name: INTERPATENT ST.TECN. BREV.
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1992-10-07	GBT	Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
1993-05-06	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
1993-05-06	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
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