EP 0082739 B1 19850529 - METHOD AND DEVICE FOR MAGNETOGRAPHIC COPYING
Title (en)
METHOD AND DEVICE FOR MAGNETOGRAPHIC COPYING
Publication
Application
Priority
FR 8124055 A 19811223
Abstract (en)
[origin: US4449132A] The invention relates to a magnetographic printing process, as well as to a machine which enables images in color to be produced on a print carrier. The machine which carries out this process comprises magnetic heads (13-1, . . . , 13-n) excited by pulses emitted by a generator (26) by means of a current calibrating means (27) to produce on the drum (10) magnetized points having different magnetizations, pigment applicator means (40, 42, 44), retouching means (41, 43), and a transfer station (45) where the pigments deposited onto the drum (10) are transferred to a paper strip (21). The electric current calibrating means is connected between the pulse generator and each of the heads so as to allow each of the current pulses emitted by the generator to be adjusted selectively to one of the p predetermined amplitude values and thus to produce on the recording surface a latent magnetic image whose magnetized points exhibit the same magnetic polarity but have different intensities of magnetization valued as J1, J2, J3 . . . Jp, such that J1>J2>J3 . . . >Jp, each of the values being associated with each one of the p values. The magnetized points are designed to produce image parts which, on the print carrier, must appear in the same color, all having the same intensity of magnetization.
IPC 1-7
IPC 8 full level
B41J 2/42 (2006.01); G03G 19/00 (2006.01)
CPC (source: EP US)
G03G 19/00 (2013.01 - EP US)
Designated contracting state (EPC)
BE DE GB IT NL
DOCDB simple family (publication)
EP 0082739 A2 19830629; EP 0082739 A3 19830817; EP 0082739 B1 19850529; DE 3263849 D1 19850704; FR 2518770 A1 19830624; FR 2518770 B1 19850913; JP S58111074 A 19830701; US 4449132 A 19840515
DOCDB simple family (application)
EP 82400422 A 19820309; DE 3263849 T 19820309; FR 8124055 A 19811223; JP 9045982 A 19820527; US 38040482 A 19820520