JPS5564255A - Donor in powder contrography - Google Patents

Donor in powder contrography

Info

Publication number
JPS5564255A
JPS5564255A JP13668678A JP13668678A JPS5564255A JP S5564255 A JPS5564255 A JP S5564255A JP 13668678 A JP13668678 A JP 13668678A JP 13668678 A JP13668678 A JP 13668678A JP S5564255 A JPS5564255 A JP S5564255A
Authority
JP
Japan
Prior art keywords
electrode
recording
generator
counter electrode
face
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
Application number
JP13668678A
Other languages
Japanese (ja)
Other versions
JPS6144311B2 (en
Inventor
Satoru Tomita
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP13668678A priority Critical patent/JPS5564255A/en
Publication of JPS5564255A publication Critical patent/JPS5564255A/en
Publication of JPS6144311B2 publication Critical patent/JPS6144311B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Dot-Matrix Printers And Others (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Electrophotography Using Other Than Carlson'S Method (AREA)
  • Magnetic Brush Developing In Electrophotography (AREA)

Abstract

PURPOSE:To perform recording with good images of high image density without any ground soiling by forming one or plural lengths of rindge form protrusions parallel to generator to the circumferential face portions of a counter electrode opposing to a recording electrode. CONSTITUTION:A donor 20 is constituted by a counter electrode 21 and a magnet roller 22. The electrode 21 is formed to a hollow cylindrical shape by non-magnetic material and with the direction of its generator being made parallel to the lengthwise direction of a recording electrode 1, it is fixed in the fixed position of the apparatus space so as to oppose to the end face buried with needle electrode over the direction of the generator by leaving the specified spacing from said end face. A ridge-form protrusion 21A is formed in one length parallel to the generator in the circumferential surface portion of the counter electrode 21 opposing to the electrode 1, across the generator direction to increase the density of the electric lines of force in the recording part and make the injection of charges to toner T and transfer of the toner T to a recording sheet S easy. As a result, recording may be performed with the good images of high image density.
JP13668678A 1978-11-08 1978-11-08 Donor in powder contrography Granted JPS5564255A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13668678A JPS5564255A (en) 1978-11-08 1978-11-08 Donor in powder contrography

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13668678A JPS5564255A (en) 1978-11-08 1978-11-08 Donor in powder contrography

Publications (2)

Publication Number Publication Date
JPS5564255A true JPS5564255A (en) 1980-05-14
JPS6144311B2 JPS6144311B2 (en) 1986-10-02

Family

ID=15181094

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13668678A Granted JPS5564255A (en) 1978-11-08 1978-11-08 Donor in powder contrography

Country Status (1)

Country Link
JP (1) JPS5564255A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6145964A (en) * 1995-04-19 2000-11-14 Pelikan Produktions Ag Contragraphy apparatus having an electrode arrangement useful for contragraphy printing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6145964A (en) * 1995-04-19 2000-11-14 Pelikan Produktions Ag Contragraphy apparatus having an electrode arrangement useful for contragraphy printing

Also Published As

Publication number Publication date
JPS6144311B2 (en) 1986-10-02

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