JPS5646772A - Magnetic copying device - Google Patents

Magnetic copying device

Info

Publication number
JPS5646772A
JPS5646772A JP12287879A JP12287879A JPS5646772A JP S5646772 A JPS5646772 A JP S5646772A JP 12287879 A JP12287879 A JP 12287879A JP 12287879 A JP12287879 A JP 12287879A JP S5646772 A JPS5646772 A JP S5646772A
Authority
JP
Japan
Prior art keywords
magnetic flux
sectional area
recording
point portion
magnetic
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
JP12287879A
Other languages
Japanese (ja)
Inventor
Masaaki Nomura
Hiroshi Kobayashi
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 JP12287879A priority Critical patent/JPS5646772A/en
Publication of JPS5646772A publication Critical patent/JPS5646772A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To obtain a copy of high resolving power and high image concentration by a method wherein the recording point portion of a core material in an auxiliary magnetic pole to selectively impress a recording magnetic field is formed smaller in a sectional area than a coiled part on the core material.
CONSTITUTION: The recording point portion 11 of a core material 1 in an auxiliary magnetic pole 3 is formed in an R form and smaller in a sectional area than a coiled portion 12 where a coil 2 is wound. When S is given to the sectional area of the recording point portion 11, the relation between magnetic flux ϕ and its density B is given by ϕ=B/S. Therefore, though the magnetic flux ϕ is constant, a larger magnetic flux density B can be obtained by making the sectional area smaller. As a result, magnetic flux density of magnetic flux lines 13 is large at the neighborhood of the recording point portion 11 and a recording magnetic field with a small spot size is obtained. At the same time, since these magnetic flux lines 13 are contracted further by a main magnetic pole 7, the magnetic flux lines 13 in a vertical magnetized membrane 10 is composed completely of a vertical component only.
COPYRIGHT: (C)1981,JPO&Japio
JP12287879A 1979-09-25 1979-09-25 Magnetic copying device Pending JPS5646772A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12287879A JPS5646772A (en) 1979-09-25 1979-09-25 Magnetic copying device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12287879A JPS5646772A (en) 1979-09-25 1979-09-25 Magnetic copying device

Publications (1)

Publication Number Publication Date
JPS5646772A true JPS5646772A (en) 1981-04-28

Family

ID=14846864

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12287879A Pending JPS5646772A (en) 1979-09-25 1979-09-25 Magnetic copying device

Country Status (1)

Country Link
JP (1) JPS5646772A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0231749U (en) * 1988-08-22 1990-02-28

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0231749U (en) * 1988-08-22 1990-02-28

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