Abstract: Printing type holder, comprising a rotary drive spindle, a support coaxial with the spindle, which is integral in rotation therewith and has at least one cylindrical part with an outer lateral surface, cavities provided on the outer lateral surface, permanent magnets respectively engaged in the cavities, polar members of soft magnetic material which are provided on either side of each permanent magnet, which extend along generatrices of the support and which define between them the cavities in the form of channels extending parallel to the spindle.
Type:
Grant
Filed:
January 27, 1989
Date of Patent:
June 12, 1990
Assignee:
Sermatec
Inventors:
Pierre Leguillochet, deceased, Jean Langlet
Abstract: A wheel (15) is freely mounted on the shaft (2) of a printing head and is in contact at its periphery with a film which is to be printed. A tachymeter (10) is provided which detects the speed of rotation of the wheel (15) and transmits a corresponding signal to apparatus (26) for controlling the speed of rotation of the motor (8).