JPS56161572A - Formation of magnetic latent image - Google Patents

Formation of magnetic latent image

Info

Publication number
JPS56161572A
JPS56161572A JP6404580A JP6404580A JPS56161572A JP S56161572 A JPS56161572 A JP S56161572A JP 6404580 A JP6404580 A JP 6404580A JP 6404580 A JP6404580 A JP 6404580A JP S56161572 A JPS56161572 A JP S56161572A
Authority
JP
Japan
Prior art keywords
magnetic
sheet
arrow
inverting
image
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.)
Pending
Application number
JP6404580A
Other languages
Japanese (ja)
Inventor
Masaaki Nomura
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 JP6404580A priority Critical patent/JPS56161572A/en
Publication of JPS56161572A publication Critical patent/JPS56161572A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G19/00—Processes using magnetic patterns; Apparatus therefor, i.e. magnetography

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

PURPOSE:To improve reproduced image density and resolving power by the use of the developer such as magnetic toner by performing AC magnetization to a magnetic recording medium, irradiating a laser beam thereto in accordance with image information and demagnetizing the same thereby forming magnetic latent images. CONSTITUTION:AC inverting magnetization 4 inverting alternately in horizontal directions as shown by arrows is applied to a magnetic recording sheet 1 formed with a magnetic layer 2 consisting of a magnetic material of low curie point such as CrO2 on a base 3. For example, the sheet is magnetized by rotating a permanent magnet 5 in the direction of the arrow A to generate the magnetic field inverting in direction at fixed periods between stationary high magnetic permeability materials 6 and 7 converging the magnetic flux thereof, mounting the sheet 1 to a cylinder or the like, and rotating the same in the direction of the arrow B thereby passing the sheet, then magnetize thereof. While this sheet 1 is being run in the direction of the arrow P, a laser beam 12 is modulated 13 in accordance with image signal Vs, is converged by a lens 14 and is irradiated to the sheet 1, whereby the area D heated to above curie point is demagnetized. In this way, a magnetic image is obtained in an undemagnetized area C.
JP6404580A 1980-05-16 1980-05-16 Formation of magnetic latent image Pending JPS56161572A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6404580A JPS56161572A (en) 1980-05-16 1980-05-16 Formation of magnetic latent image

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6404580A JPS56161572A (en) 1980-05-16 1980-05-16 Formation of magnetic latent image

Publications (1)

Publication Number Publication Date
JPS56161572A true JPS56161572A (en) 1981-12-11

Family

ID=13246735

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6404580A Pending JPS56161572A (en) 1980-05-16 1980-05-16 Formation of magnetic latent image

Country Status (1)

Country Link
JP (1) JPS56161572A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5707754A (en) * 1995-01-26 1998-01-13 Sharp Kabushiki Kaisha Magnetic recording medium and thermal recording printing device adopting the same
US5981039A (en) * 1996-08-30 1999-11-09 Sharp Kabushiki Kaisha Magnetic recording medium and a manufacturing method thereof as well as a photo-printing apparatus using such a magnetic recording medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5707754A (en) * 1995-01-26 1998-01-13 Sharp Kabushiki Kaisha Magnetic recording medium and thermal recording printing device adopting the same
US5981039A (en) * 1996-08-30 1999-11-09 Sharp Kabushiki Kaisha Magnetic recording medium and a manufacturing method thereof as well as a photo-printing apparatus using such a magnetic recording medium

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