| 摘要 |
<p>There is disclosed a cam 5 which has a first part 6 in the form of an arc of a circle and a second part 7 in the form of the remainder of the same circle, the first and second parts of the cam being pivotal with respect to each other at two places spaced apart along the same pivotal axis 8. There is also provided a rotary filling head with a plurality of filling stations, each of which is associated with a reciprocal piston 1 having a piston rod 2 with a piston control roller 3 and a weight control roller 4, the filling head having: a weight control cam 33 which can limit the movement in one direction of the piston rods by rolling abutment between the weight control rollers 4 and the weight control cam 33; and a piston control cam 5. By virtue of the cam and the filling head which incorporates the cam, the dosing system becomes fully adjustable. In fact, adjustment could even be made whilst the machine continues to run.</p> |
