GRAPH PLOTTER Russian patent published in 1996 - IPC

FIELD: graphics, drawing. SUBSTANCE: invention is intended for simultaneous drawing of specified graphic image on information medium by several printing elements by their linear movement along coordinates X and Y. Graph plotter incorporates frame 1 which carries table-chart board 2 and granite guides 3. Linear electric motors of coordinate X are put on guides 3 and are composed of windingless secondary element 4 manufactured in the form of rack mounted rigidly on granite guide 3 over entire length of table-chart board 2, and mobile primary element 5 (inductor) on aerostatic supports (air cushions). On one and same secondary element 4 of linear electric motor of coordinate X there are mounted two and more mobile primary elements 5 (inductors) of linear electric motor of coordinate X. Linear electric motors of coordinate X may be installed both on one side of table-chart board and on both sides. If rods 7 are arranged in cantilever on both sides of table-chart board rods are positioned along plane of table with clearance A over face surface 10, carriages 8 are provided with protrusions 11 and are put on rod 7 for extension of printing element 9 beyond limits of over-all length of rod 7 by value of clearance A. EFFECT: simultaneous drawing of graphic image by several printing elements, enhanced drawing precision. 2 cl, 4 dwg