JPS5646772A - Magnetic copying device - Google Patents
Magnetic copying deviceInfo
- 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
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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0231749U (en) * | 1988-08-22 | 1990-02-28 |
-
1979
- 1979-09-25 JP JP12287879A patent/JPS5646772A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0231749U (en) * | 1988-08-22 | 1990-02-28 |
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