WO1990014960A1 - A method for improving the printing quality and repetition accuracy of electrographic printers and a device for accomplishing the method - Google Patents
A method for improving the printing quality and repetition accuracy of electrographic printers and a device for accomplishing the method Download PDFInfo
- Publication number
- WO1990014960A1 WO1990014960A1 PCT/SE1990/000398 SE9000398W WO9014960A1 WO 1990014960 A1 WO1990014960 A1 WO 1990014960A1 SE 9000398 W SE9000398 W SE 9000398W WO 9014960 A1 WO9014960 A1 WO 9014960A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electrodes
- passages
- electrode matrix
- electrode
- printers
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/385—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective supply of electric current or selective application of magnetism to a printing or impression-transfer material
- B41J2/41—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective supply of electric current or selective application of magnetism to a printing or impression-transfer material for electrostatic printing
- B41J2/415—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective supply of electric current or selective application of magnetism to a printing or impression-transfer material for electrostatic printing by passing charged particles through a hole or a slit
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
- G03G15/34—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the powder image is formed directly on the recording material, e.g. by using a liquid toner
- G03G15/344—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the powder image is formed directly on the recording material, e.g. by using a liquid toner by selectively transferring the powder to the recording medium, e.g. by using a LED array
- G03G15/346—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the powder image is formed directly on the recording material, e.g. by using a liquid toner by selectively transferring the powder to the recording medium, e.g. by using a LED array by modulating the powder through holes or a slit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/385—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective supply of electric current or selective application of magnetism to a printing or impression-transfer material
- B41J2/41—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective supply of electric current or selective application of magnetism to a printing or impression-transfer material for electrostatic printing
- B41J2/415—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective supply of electric current or selective application of magnetism to a printing or impression-transfer material for electrostatic printing by passing charged particles through a hole or a slit
- B41J2/4155—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective supply of electric current or selective application of magnetism to a printing or impression-transfer material for electrostatic printing by passing charged particles through a hole or a slit for direct electrostatic printing [DEP]
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2217/00—Details of electrographic processes using patterns other than charge patterns
- G03G2217/0008—Process where toner image is produced by controlling which part of the toner should move to the image- carrying member
- G03G2217/0025—Process where toner image is produced by controlling which part of the toner should move to the image- carrying member where the toner starts moving from behind the electrode array, e.g. a mask of holes
Definitions
- the invention refers to a method and a device to improve the printing quality and the repetition accuracy of electro- graphical printers, in which are produced a latent electric charge pattern of electrical signals by means of an elec ⁇ trode matrix or the like, which opens respectively closes passages between electrodes for exposing electric fields for attraction of pigment particles against an information carrier.
- the EMS-concept refers to electrode matrices in which passa ⁇ ges or meshes through the matrix are defined and separated by simple electrodes which results in that the potential of every single electrode substantially influences the charac ⁇ teristics of the electric field on the pigment particles symmetrically in passages adjoining the electrodes.
- the object of the invention is to create a method which gives the EMS and other electrographic printer concepts, high quality prints with good readability even during such circumstances when the device operates continously without maintenance and service .
- Fig. 1 shows a section of an electrode matrix the meshes of which are defined with double electrodes.
- Fig. 2 shows the position and form of the equipotential lines in a two dimensional lateral view of the electrode matrix according to fig. 1 in the electric field produced by a certain voltage setting of the electrode matrix.
- Fig. 3 shows a woven net with double electrodes in perspec ⁇ tive.
- Fig. 4 shows an electrode matrix with double electrodes produced as a conductor pattern on a carrier.
- the reference numeral designates an elec ⁇ trode, in the continuation called a print electrode, the extension of which is substantially parallel to the movement direction of the paper.
- a second elec ⁇ trode which in the continuation is called a transversal electrode, in the same electrode matrix, and the extension of which is substantially tranversal against the movement direction of the paper and with 3 one of many passages or meshes, between the electrodes 1, 2 through which transport of toner takes place at the development.
- 7 is designa ⁇ ted an information carrier, eg.
- a sheet of paper with 8 an equipotential line in an electric field between a developer roller 9 for transport of pigment particles 11 (also called toner) from a container 14 in the proximity of the electrode matrix, and with 10 a background electrode, which can be a so called plate electrode.
- 12 designates a carrier for the electrode matrix and/or its pattern of connecting conductors and electric resistors 13.
- Fig. 1 shows an electrode matrix with double electrodes 1, 2 in both electrode directions.
- equipotential lines 8 The appearance of the electric field can be illustrated by equipotential lines 8.
- Fig. 2 gives an example on this calculated by a numerical method (the finite element met- hod).
- equipotential lines which represent a potential, which in relation to the charge of the toner par ⁇ ticles has an "attracting" influence on the toner, have been marked with solid lines 8a.
- the toner particles 11, which for the sake of clarity only have been marked in the right part of the picture, in this example are negatively charged. All electrodes except for two have "white" voltage of - 400 V.
- Fig. 2 shows clearly that the earlier mentioned and undesired crosstalk which is present at single-wired electrode matrices is no longer troublesome.
- equipotential lines 8a penetrate down through the mesh 3 and will thereby increase the field to the extent necessary for the toner to lift from developing roller (not shown).
- the lines 8a have been "forced” up in a direc ⁇ tion from the toner particles 11 and “substituted” by "bloc- king" equipotential lines 8b.
- the appearance and form are equal for the process in the mesh at B as in the mesh to the right in the picture.
- Fig. 3 and 4 shows examples on devices according to the invention.
- the invention is not limited to the above described embodi ⁇ ment. Thus it is possible to apply the invention on other developing and pigment particle systems than those shown herein, eg monocomponent toner with carrier. Parts of the invention are also useful when the electrode matrix is placed behind the " paper in a way that is described in eg. PCT/SE88/00653.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69014880T DE69014880T2 (en) | 1989-06-07 | 1990-06-07 | METHOD FOR IMPROVING PRINT QUALITY AND REPEAT PRECISION IN ELECTROGRAPHIC PRINTER AND DEVICE FOR USING THIS METHOD. |
EP90909497A EP0476030B1 (en) | 1989-06-07 | 1990-06-07 | A method for improving the printing quality and repetition accuracy of electrographic printers and a device for accomplishing the method |
KR1019910701802A KR0167351B1 (en) | 1989-06-07 | 1990-06-07 | Method for improving the printing quality and repetition accuracy of electrographic printers |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8902090A SE8902090D0 (en) | 1989-06-07 | 1989-06-07 | SET TO IMPROVE PRINT PERFORMANCE FOR PRINTERS AND DEVICES FOR IMPLEMENTATION OF THE SET |
SE8902090-3 | 1989-06-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1990014960A1 true WO1990014960A1 (en) | 1990-12-13 |
Family
ID=20376234
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE1990/000394 WO1990014959A1 (en) | 1989-06-07 | 1990-06-07 | Method for improving printing performance for printers and a device for accomplishing the method |
PCT/SE1990/000398 WO1990014960A1 (en) | 1989-06-07 | 1990-06-07 | A method for improving the printing quality and repetition accuracy of electrographic printers and a device for accomplishing the method |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE1990/000394 WO1990014959A1 (en) | 1989-06-07 | 1990-06-07 | Method for improving printing performance for printers and a device for accomplishing the method |
Country Status (7)
Country | Link |
---|---|
US (2) | US5446478A (en) |
EP (2) | EP0476030B1 (en) |
JP (2) | JP2769389B2 (en) |
KR (2) | KR100198899B1 (en) |
DE (2) | DE69014880T2 (en) |
SE (1) | SE8902090D0 (en) |
WO (2) | WO1990014959A1 (en) |
Cited By (15)
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EP0550880A2 (en) * | 1992-01-07 | 1993-07-14 | Sharp Kabushiki Kaisha | Image forming device |
EP0617335A2 (en) * | 1993-03-24 | 1994-09-28 | Hitachi Metals, Ltd. | Direct recording method |
US5515084A (en) * | 1993-05-18 | 1996-05-07 | Array Printers Ab | Method for non-impact printing utilizing a multiplexed matrix of controlled electrode units and device to perform method |
EP0752317A1 (en) | 1995-07-06 | 1997-01-08 | Hewlett-Packard Company | Toner projection printer with means to reduce toner spreading |
EP0752318A1 (en) | 1995-07-06 | 1997-01-08 | Hewlett-Packard Company | Toner projection printer with capacitance-coupled address electrode structure |
EP0753412A1 (en) | 1995-07-06 | 1997-01-15 | Hewlett-Packard Company | Toner projection printer with improved address electrode structure |
US5774159A (en) * | 1996-09-13 | 1998-06-30 | Array Printers Ab | Direct printing method utilizing continuous deflection and a device for accomplishing the method |
US5818480A (en) * | 1995-02-14 | 1998-10-06 | Array Printers Ab | Method and apparatus to control electrodes in a print unit |
US5818490A (en) * | 1996-05-02 | 1998-10-06 | Array Printers Ab | Apparatus and method using variable control signals to improve the print quality of an image recording apparatus |
US5847733A (en) * | 1996-03-22 | 1998-12-08 | Array Printers Ab Publ. | Apparatus and method for increasing the coverage area of a control electrode during direct electrostatic printing |
US5889542A (en) * | 1996-11-27 | 1999-03-30 | Array Printers Publ. Ab | Printhead structure for direct electrostatic printing |
US5956064A (en) * | 1996-10-16 | 1999-09-21 | Array Printers Publ. Ab | Device for enhancing transport of proper polarity toner in direct electrostatic printing |
US5959648A (en) * | 1996-11-27 | 1999-09-28 | Array Printers Ab | Device and a method for positioning an array of control electrodes in a printhead structure for direct electrostatic printing |
US8565649B2 (en) | 2009-03-30 | 2013-10-22 | Canon Kabushiki Kaisha | Developer supply container and developer supplying system |
US9229368B2 (en) | 2009-03-30 | 2016-01-05 | Canon Kabushiki Kaisha | Developer supply container and developer supplying system having pump operated developer discharge |
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US5374949A (en) * | 1989-11-29 | 1994-12-20 | Kyocera Corporation | Image forming apparatus |
DE4038085C2 (en) * | 1989-11-29 | 2002-09-19 | Kyocera Corp | Direct electrostatic toner imaging printer |
US5327169A (en) * | 1992-08-05 | 1994-07-05 | Xerox Corporation | Masked magnetic brush direct writing for high speed and color printing |
SE9203392L (en) * | 1992-11-13 | 1994-02-21 | Array Printers Ab | Apparatus for producing multicolor prints |
SE500325C2 (en) * | 1992-11-16 | 1994-06-06 | Array Printers Ab | Ways and Devices to Improve Print Quality for Electrographic Printers |
SE503955C2 (en) * | 1994-09-19 | 1996-10-07 | Array Printers Ab | Method and apparatus for feeding toner particles in a printer unit |
JP2001509744A (en) * | 1994-12-15 | 2001-07-24 | アライ プリンターズ アクティエボラーグ | Serial printing system to attach powder particles directly |
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JPH0952383A (en) * | 1995-08-11 | 1997-02-25 | Ito Communication Ltd | Powder scattering type recorder |
US6000786A (en) * | 1995-09-19 | 1999-12-14 | Array Printers Publ. Ab | Method and apparatus for using dual print zones to enhance print quality |
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US5971526A (en) * | 1996-04-19 | 1999-10-26 | Array Printers Ab | Method and apparatus for reducing cross coupling and dot deflection in an image recording apparatus |
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US5794107A (en) * | 1996-09-09 | 1998-08-11 | Xerox Corporation | Toner container with molded spring |
US5966152A (en) * | 1996-11-27 | 1999-10-12 | Array Printers Ab | Flexible support apparatus for dynamically positioning control units in a printhead structure for direct electrostatic printing |
US6011944A (en) * | 1996-12-05 | 2000-01-04 | Array Printers Ab | Printhead structure for improved dot size control in direct electrostatic image recording devices |
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- 1990-06-07 WO PCT/SE1990/000394 patent/WO1990014959A1/en active IP Right Grant
- 1990-06-07 DE DE69014880T patent/DE69014880T2/en not_active Expired - Fee Related
- 1990-06-07 US US07/781,208 patent/US5446478A/en not_active Expired - Fee Related
- 1990-06-07 US US07/781,265 patent/US5235354A/en not_active Expired - Fee Related
- 1990-06-07 EP EP90909497A patent/EP0476030B1/en not_active Expired - Lifetime
- 1990-06-07 KR KR1019910701801A patent/KR100198899B1/en not_active IP Right Cessation
- 1990-06-07 EP EP90909799A patent/EP0476041B1/en not_active Expired - Lifetime
- 1990-06-07 JP JP2509789A patent/JP2769389B2/en not_active Expired - Lifetime
- 1990-06-07 JP JP2508977A patent/JP2733137B2/en not_active Expired - Lifetime
- 1990-06-07 KR KR1019910701802A patent/KR0167351B1/en not_active IP Right Cessation
- 1990-06-07 DE DE69012122T patent/DE69012122T2/en not_active Expired - Fee Related
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Cited By (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0550880A3 (en) * | 1992-01-07 | 1993-08-04 | Sharp Kabushiki Kaisha | Image forming device |
US5559586A (en) * | 1992-01-07 | 1996-09-24 | Sharp Kabushiki Kaisha | Image forming device having control grid with applied voltage of the same polarity as toner |
EP0550880A2 (en) * | 1992-01-07 | 1993-07-14 | Sharp Kabushiki Kaisha | Image forming device |
EP0617335A2 (en) * | 1993-03-24 | 1994-09-28 | Hitachi Metals, Ltd. | Direct recording method |
EP0617335A3 (en) * | 1993-03-24 | 1996-02-28 | Hitachi Metals Ltd | Direct recording method. |
US5559541A (en) * | 1993-03-24 | 1996-09-24 | Hitachi Metals, Ltd. | Direct recording method |
US5515084A (en) * | 1993-05-18 | 1996-05-07 | Array Printers Ab | Method for non-impact printing utilizing a multiplexed matrix of controlled electrode units and device to perform method |
US5818480A (en) * | 1995-02-14 | 1998-10-06 | Array Printers Ab | Method and apparatus to control electrodes in a print unit |
US5867191A (en) * | 1995-07-06 | 1999-02-02 | Hewlett-Packard Company | Toner projection printer with means to reduce toner spreading |
US5654745A (en) * | 1995-07-06 | 1997-08-05 | Hewlett-Packard Company | Toner projection printer with capacitance-coupled address electrode structure |
US5717449A (en) * | 1995-07-06 | 1998-02-10 | Hewlett-Packard Company | Toner projection printer with improved address electrode structure |
EP0752318A1 (en) | 1995-07-06 | 1997-01-08 | Hewlett-Packard Company | Toner projection printer with capacitance-coupled address electrode structure |
EP0752317A1 (en) | 1995-07-06 | 1997-01-08 | Hewlett-Packard Company | Toner projection printer with means to reduce toner spreading |
EP0753412A1 (en) | 1995-07-06 | 1997-01-15 | Hewlett-Packard Company | Toner projection printer with improved address electrode structure |
US5847733A (en) * | 1996-03-22 | 1998-12-08 | Array Printers Ab Publ. | Apparatus and method for increasing the coverage area of a control electrode during direct electrostatic printing |
US5818490A (en) * | 1996-05-02 | 1998-10-06 | Array Printers Ab | Apparatus and method using variable control signals to improve the print quality of an image recording apparatus |
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Also Published As
Publication number | Publication date |
---|---|
DE69014880T2 (en) | 1995-06-22 |
KR100198899B1 (en) | 1999-06-15 |
DE69012122T2 (en) | 1995-02-02 |
DE69014880D1 (en) | 1995-01-19 |
DE69012122D1 (en) | 1994-10-06 |
JPH04505896A (en) | 1992-10-15 |
JP2733137B2 (en) | 1998-03-30 |
EP0476041B1 (en) | 1994-08-31 |
EP0476030A1 (en) | 1992-03-25 |
KR0167351B1 (en) | 1999-05-01 |
KR920700926A (en) | 1992-08-10 |
SE8902090D0 (en) | 1989-06-07 |
US5446478A (en) | 1995-08-29 |
EP0476041A1 (en) | 1992-03-25 |
KR920700927A (en) | 1992-08-10 |
JPH04505899A (en) | 1992-10-15 |
WO1990014959A1 (en) | 1990-12-13 |
EP0476030B1 (en) | 1994-12-07 |
JP2769389B2 (en) | 1998-06-25 |
US5235354A (en) | 1993-08-10 |
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