Rotary cylindrical screen printing apparatus for specularly prin

Printing – Stenciling – Rotary machines

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Details

101124, 101118, 101180, 101221, 101224, B41F 1512

Patent

active

042389992

ABSTRACT:
A rotary cylindrical-screen printing apparatus for specularly printing equal patterns and/or colors onto the opposite faces of a fabric is disclosed, comprising two rotary screen printing machines, each equipped with electromechanical means for synchronizing the speed of the belt with the speed of the printing rollers, in which said machines are coupled by arranging one machine over the other, the fabric entering the underlying machine and thereafter entering the second upper machine which prints the opposite face of the fabric, the second machine comprising a transmission roller associated with its belt having a diameter equal to at least twice the diameter of the contiguous roller of the first machine, the apparatus comprising means for synchronizing the speeds of the printing rollers of two machines, including a transducer linked to the speed of the belt of a machine, whose outgoing frequency signal is sent to pilot the electrohydraulic motors controlling the printing rollers of both machines and means for synchronizing the speeds and phase of the two belts by linking the speed of the belt of one machine with the speed of the other belt through digital-analogue converters effecting a comparison between frequency signals picked up proportionally to the speeds of the two belts so as to emit a signal for the correction of speed and phase, said signal being sent to a means for driving the belt of the controlled machine.

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patent: 3601587 (1971-08-01), Thiede
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patent: 3915090 (1975-10-01), Horst et al.
patent: 3934505 (1976-01-01), Kushner
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