Automatic tracing apparatus comprising a head of tracing provided with a tracer has a thin tube

摘要

P a.l' invention relates to a device for automatic tracing comprising a head of tracing provided with a tracer a thin tube, which may assume a resting position and a position of lowered, a closure element, and he closes, in the rest position, the prior end of the tube end. / p & & p & b.cet apparatus is characterizes in that the tracer can take up an intermediate position in which the end front of the tube end is located at the - the top of the element of a section, the tracer may be lowered to the intermediate position in the position of writing. / p & & p & c.l' invention is applicable to the automatic tracing. / p