Abstract: A system for locking thin flexible printing plates on to rotary printing press saddles includes securing means positioned along a first longitudinal side edge of such a saddle and a support member rotatably journaled along a second longitudinal side edge of the saddle and biased longitudinally away from the first transverse side. Pins are secured to the support member to register with corresponding openings in such a flexible printing plate. A rotation tool with openings formed along an edge to coact with said register pins is operable to rotate the support member to secure such a flexible printing plate. A locking means is provided to prevent support member rotation when such a flexible printing plate is secured to such a saddle.

Abstract: An excavator comprising a main arm, a jib, a crank arm and a bucket. A swivel joint connects the main arm and the jib. The jib can be turned out of the plane of the main arm and thus be inclined sideways. Digging of an embankment at an oblique angle and digging road ditches with a gradient are thus permitted.