Abstract: A printhead support structure may have a receiving portion to receive a printhead, first and second portions having an adjustment mechanism therebetween for converting a translational movement of the first portion to a rotational movement of the second portion, and a coupling mechanism coupling the second portion to the receiving portion for adjusting the rotational angle of the printhead. A method for adjusting a position of a printhead coupled to a printhead support may include applying a force to a first portion of the printhead support to effect a translational movement of the first portion, converting the translational movement of the first portion into a rotational movement of a second portion of the printhead support, and applying the rotational movement of the second portion to the printhead.

Abstract: A printhead support structure may have a receiving portion to receive a printhead, first and second portions having an adjustment mechanism therebetween for converting a translational movement of the first portion to a rotational movement of the second portion, and a coupling mechanism coupling the second portion to the receiving portion for adjusting the rotational angle of the printhead. A method for adjusting a position of a printhead coupled to a printhead support may include applying a force to a first portion of the printhead support to effect a translational movement of the first portion, converting the translational movement of the first portion into a rotational movement of a second portion of the printhead support, and applying the rotational movement of the second portion to the printhead.

Abstract: A hydraulic control valve (10; 110) which acts as a hydraulic flow amplifier. An obturator (34; 134) is slidable towards and away from a valve seat (36; 136) to controllably vary throughflow from an inlet (S; P) to an outlet (T; S). The obturator (34; 134) is mounted on a piston (30; 130) which is slidable in dependence on the excess of the difference between inlet and outlet pressures over control pressure in a control chamber (42; 142). The control chamber (42; 142) is fed with hydraulic fluid bled from the source (S; P) via a controlled leak (48+50; 148+150) which is self-regulating in dependence on throughflow-controlling movement of the piston/obturator (34/30; 134/130) in a sense which provides negative feedback. The control chamber (42; 142) is drained through a fluid conduit (54; 154) incorporating an externally-controllable fluid flow restriction (56; 156) which serves as the control input to the control valve (10; 110).