Importance

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Abstract

The invention relates to a magnetographic printing process, as well as to aachine 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 J.sub.1, J.sub.2, J.sub.3 . . . J.sub.p, such that J.sub.1 >J.sub.2 >J.sub.3 . . . >J.sub.p, 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.

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First Claim