A forming machine including a frame extending longitudinally on either side
of a tool. This tool is arranged transversally to the central portion of
the frame. Jaws arranged on either side of the tool, are each actuated by
two pairs of quasi-horizontal jacks and quasi-vertical jacks. Each jaw
comprises a point which is mobile in a vertical longitudinal plane, and
this point is held in such plane by means of one of the control jacks of
the jaw especially a quasi-vertical jack. This guiding jack includes pads
arranged on the upper end of its roll and these pads slide on longitudinal
vertical planes integral with the frame. The cradle of the jaw is hinged
on the end of the rod of the guiding jack by means of an axis which is
perpendicular to the axis of the jack whereof the axis is situated in the
guiding plane.