Commissariat a L'energie Atomique

Compagnie Internationale Pour L'informatique

Societe D'applications Generales D'elect.

Societe D'applications Generales D'electricite Et De Mecaniques Sagem

Jean-Yves Valet

Jean-Pierre Lazzari

Patrick Vegeais

Michel Brot

Christian Dol

Writing device with heating elements for printing by thermal action on a ting support, mounted on a base and comprising a heating elements support bearing the heating elements and first electrical contacts connected directly to said heating elements, an intermediate support to support mechanically and removably the support, a connecting part provided with second electrical contacts adapted to cooperate with the first contacts of the support and attached respectively to the base. A fixing device fasten the support and the part to the base so as to permit, between the heating elements support and the base, the relative movements necessary for the progress of the writing process. A device for positioning of the heating elements support on the intermediate support, and locking device to make fast mechanically and removably the heating elements support to the intermediate support are also included.

Thermal printhead mounting control

The invention relates to a printing device comprising: a travelling surface, for example the surface of a drum, driven in rotation by the action of first motor means, said travelling surface supporting a thin magnetic layer; a scanning support driven with a step-by-step reciprocal movement, perpendicular to the movement of the travelling surface of said drum, by the action of second motor means, said scanning support supporting at least one group of integrated magnetic induction heads, this group of heads being connected to sequential control means; powdered magnetic ink supply means; ordinary paper supply means; said scanning support having an annular shape surrounding the travelling surface of the drum over a considerable part at least of its circumferential extent; said scanning support comprising two lateral parts surrounding a central part; said lateral parts being arranged to create a seal between themselves and said travelling surface of said drum; said central part supporting one, or preferably more, groups of integrated magnetic induction heads; a compressed gas supply device connected to said central part; said powdered magnetic ink supply means being connected to the outside of said scanning support.

Powdered magnetic ink printing devices

A device for testing the magnetic properties of a magnetic material in which a measurement air gap and a measurement compensation air-gap, is established and a measuring coil is provided for collecting a voltage which is proportional to the variation of amplitude of the resultant useful flux derived from the magnetic material which is placed in the vicinity of the measurement air-gap.

Device for testing the magnetic properties of a magnetic material

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Beauchamp, France

Jean-Yves Valet