Facsimile receiver having movable printing bar

In a facsimile receiver including a printing bar and a rotatable drum carrying a printing helix adapted to cooperate with said printing bar to electrically print on a paper disposed therebetween, the improvement comprising printing bar support means for pivotably supporting said printing bar for movement from a rest position remote from said drum to an operative position where the printing bar bears on the helix, a control shaft mounted for axial rotation in parallel with said drum, a return lever mounted on said control shaft and bearing at one end against said printing bar support means so as to shift said printing bar support means to place said printing bar in its operative position upon rotation of said control shaft, bias means for normally biasing said printing bar support means to place said printing bar in its rest position, and control means responsive to rotation of said drum for rotating said control shaft, said control means including a cam mounted on the shaft of said drum for rotation therewith, a control lever mounted on said control shaft in the plane of said cam so as to be displaced by said cam from a standby position to a locking position upon rotation of said drum thereby rotating said control shaft to force said return lever against said printing bar support means to shift said printing bar to its operative position, locking means for locking said control lever in its locking position during the initial rotation of said cam, and means for normally biasing said control lever toward its standby position, said locking means including a locking lever carrying a locking finger disposed in the plane of said cam and being biased into a position in the path of movement of said control lever, the end of said control lever being provided with a nib so as to permit said locking finger to ride up over the end of said control lever only when said control lever moves from its standby position to its locking position in response to rotation of said cam, said locking finger preventing return movement of said control lever.