Compagnie Internationale Pour L'informatique Cii-honeywell Bull (societe

Compagnie Internationale Pour L'informatique Cii-honeywell Bull

Compagnie Honeywell Bull (societe Anonyme)

Compagnie Honeywell Bull

Jean G Magnenet

Jean-Jacques Binder

A part which is attached to a support frame is pressed against a rotatable member mounted within that support frame. An element having four degrees of freedom is mounted between the support and a point on the part. A biasing element is mounted between the support and a second point on the part to urge the part against the movable member. The structure is useful in the recording of data on a magnetic recording machine and impactless magnetic printing machines.

Arrangement for holding a part attached to a support frame held against

The invention relates to a printing process and machine which enables the production of two-color images on a print carrier. The machine which carries out this process consists of two applicators (40,42) placed one after the other to deposit two layers of differently colored pigments onto the magnetic drum (10). The surface of the drum has produced thereon a latent magnetic image whose magnetic points have the same intensity of magnetization, but opposite polarities, the magnetic points intended to produce powder-image parts in one of said colors being opposite to that of the points intended to produce the other parts of said image. A transfer station (44,45) is provided with a magnetic field generator (21) located upstream to the point (45) where the pigments are transferred to the print carrier (20). The magnetic-field generator (21) applies a constant magnetic field to the recording surface in a direction perpendicular to the surface. The amplitude (H) and the direction of the magnetic field serves to reduce the intensity of magnetization of the magnetized points intended to produce on the carrier powder image parts whose color is that of one powdery developer and to increase the intensity of magnetization of the other magnetized points. The sole second developer, which has been deposited onto the points whose magnetizations have been increased, is transferred to the print carrier, while the two developers, which have been deposited onto the points whose magnetizations have been reduced, are transferred to said carrier in superimposed layers.

Process and machine for magnetographic printing (I)

The invention relates to a magnetographic printing process, as well as to a achine 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 &gt;J.sub.2 &gt;J.sub.3 . . . &gt;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.

Process and machine for magnetographic printing (II)

The invention relates to a printing process, as well as to a machine which enables images in color to be produced on a print carrier. The machine which implements said process comprises magnetic heads (13-l, . . . 13-n) energized by impulses emitted by a source (26) by means of a frequency-generating means (27) in order to produce on the drum (10) magnetized points having different sizes, pigment-applying means (40, 42, 44) retouching means, and a transfer station (45) where the pigments deposited onto the drum (1) are transferred to a strip of paper (21).

Process and machine for magnetographic printing (III)

An arrangement for recording information on a magnetic record carrier, having at least one magnetic recording head which incorporates an electromagnet having a core, wherein said arrangement includes a magnetic shunt, said magnetic shunt and the magnetic core of the electromagnet being adapted to be arranged on either side of said record carrier and close thereto, so as to form a closed magnetic circuit in which the magnetic flux is substantially perpendicular to the surface of the carrier, the said core having a recording pole and a flux-closing pole and the cross-section of the recording pole being smaller than that of the flux-closing pole.

Head arrangement for perpendicular recording information on a magnetic

An electromagnetic striker apparatus. The apparatus includes a core member, a coil associated with the core member and an armature member. The apparatus also includes means for guiding the armature member in movement relative to the core member. In response to actuation of the coil, the armature moves from a rest position to a strike position, whereby a character key is driven against a print support. Under the influence of the guiding means, the armature moves substantially parallel to the magnetic flux lines within the armature.

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Belfort, France

Jean G Magnenet