FIELD: drawing appliances. SUBSTANCE: follow-up system comprises upper and lower follower rollers. Position of their rotation axes can be changed relative to rotation axes of transport rollers by means of differential gear transmission and carrier lever which link together the lower transport and follower rollers. Writing means has the form of three spring-loaded ball-point cylinders. Said cylinders are installed in holder at an angle to one another at a distance of 0.5 mm between their writing points. Holder is linked kinematically with upper transport and follower rollers by a lever installed in body. Upper follower roller is spherical. EFFECT: improved design. 2 dwg
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