Schlumberger Industries

Benson S.a.

Remy Jaffres

Jean-Claude Dard

Jean-Louis Richard

Thierry Lasjaunias

A write head for an X-Y plotter comprises a write head body (10) movably mounted in a horizontal direction relative to a write medium (14) and a pen (30) movably mounted in a vertical direction with respect to the head body (10) between pen-up and pen-down positions. The mounting for the pen (30) allows movement with respect to the head body and (10) comprises a parallelogram-shaped deformable element (20) made out of molded plastic material. This deformable element has a first side portion (21) attached to the head body, a second side portion (22) supporting the pen and two parallel arms (23, 24) pivotally linking the first and second side portions through horizontal hinge portions of reduced thickness (23a, 23b, 24a, 24b). An actuator (40) has a permanent magnet (44) fixed to the head body and a coil (42) fixed to the second side portion and moves the pen between pen-up and pen-down positions.

Write head for a drawing machine having a deformable mounting for a

The structural base unit of the machine is made of a one-piece shaped beam (40) which extends along a first direction (Y) with a first portion (41) which, due to its own stiffness, supports and guides the carriage (12) carrying the writing head (11) along its translational motion in the first direction (Y), and with second and third portions (45) which defines supporting surfaces for the drum (20) driving the printing medium in a second direction (X) perpendicular to the first direction (Y). Guiding of the carriage (12) is ensured by rails (43, 44) formed integral with the beam or attached to it, and a slot (50) cut in the shaped beam (40) along the action area of the writing head for providing a passage for the printing medium and its engagement with the drum (20).

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Unieux, France

Remy Jaffres