GB1439405A - Data accumulation system providing magnetic toner powder recording - Google Patents

Data accumulation system providing magnetic toner powder recording

Info

Publication number
GB1439405A
GB1439405A GB4030873A GB4030873A GB1439405A GB 1439405 A GB1439405 A GB 1439405A GB 4030873 A GB4030873 A GB 4030873A GB 4030873 A GB4030873 A GB 4030873A GB 1439405 A GB1439405 A GB 1439405A
Authority
GB
United Kingdom
Prior art keywords
document
magnetic
sheet
toner powder
aug
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.)
Expired
Application number
GB4030873A
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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
Priority claimed from US284071A external-priority patent/US3858514A/en
Priority claimed from US00388049A external-priority patent/US3849161A/en
Application filed by Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of GB1439405A publication Critical patent/GB1439405A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
    • G07F7/08—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
    • 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
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
    • G07F7/08—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
    • G07F7/0806—Details of the card
    • G07F7/0833—Card having specific functional components

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

1439405 Magnetic printing MINNESOTA MINING & MFG CO 24 Aug 1973 [28 Aug 1972 13 Aug 1973] 40308/73 Headings B6F and B6C A data recording system comprises a master source document 10 consisting of a homogeneous sheet of particulate permanent magnet material in a flexible binder, the sheet having a coercive force of not less than 1000 oersteds and a maximum energy product of not less than 5Î10<SP>5</SP> gauss-oersteds, the document 10 having a magnetic image recorded thereon which is copied in visual form on to a sheet 30 by bringing the sheet 30 into contact with the document 10 and applying magnetic toner powder 46 to the surface of the sheet 30 facing away from the document 10. The magnetic image may be applied to the document 10 by selectively actuated styli 16, or the document 10 may be in the form of selectable regions of bands (84, Figs. 4-6, not shown). The visual image is fixed at 54, and may be read automatically by an optical or magnetic pick-up device 55. The toner applicator may comprise a non- magnetic drum 34 having an adhesive surface layer to which a thin layer 42 of iron particles adheres, the toner powder 46 being magnetically attracted to the layer 42 by a magnet 48. Excess toner powder is detached by gravity and by a sweeper magnet 50 which also acts to spread the toner powder on the layer 42. A bias magnet 52 reinforces the magnetic fields of the master source document 10.
GB4030873A 1972-08-28 1973-08-24 Data accumulation system providing magnetic toner powder recording Expired GB1439405A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US284071A US3858514A (en) 1972-08-28 1972-08-28 Data accumulation system providing magnetic toner powder recording
US00388049A US3849161A (en) 1973-08-13 1973-08-13 Magnetic toner powder applicator

Publications (1)

Publication Number Publication Date
GB1439405A true GB1439405A (en) 1976-06-16

Family

ID=26962397

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4030873A Expired GB1439405A (en) 1972-08-28 1973-08-24 Data accumulation system providing magnetic toner powder recording

Country Status (5)

Country Link
JP (1) JPS4987253A (en)
DE (2) DE2365580A1 (en)
FR (1) FR2199597B1 (en)
GB (1) GB1439405A (en)
IT (1) IT1008545B (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1183041A (en) * 1965-12-24 1970-03-04 Int Computers Ltd Priting Apparatus

Also Published As

Publication number Publication date
DE2365580A1 (en) 1975-12-18
JPS4987253A (en) 1974-08-21
FR2199597A1 (en) 1974-04-12
FR2199597B1 (en) 1978-10-06
DE2343616A1 (en) 1974-03-28
IT1008545B (en) 1976-11-30

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee