filling machines
filling machines
filling machines
container filling machine comprises a plurality of filling stations each including a container platform which is raised and lowered by a cam controlled elevating mechanism, for providing bottom-up filling; a cam-controlled pumping mechanism operating a piston pump for drawing fluid into the pump during a charge cycle, and pushing the fluid out of the pump during a discharge cycle; and an adjustable crank lever mechanism is included in the cam controlled pumping mechanism for providing adjustment of the volume of fluid being pumped. Operating in common with the filling stations are a pair of cams for operating the valves of each station, and in combination with each cam-controlled pumping mechanism provide greater than 180 of machine time for continuously filling a container during the discharge cycle for each station. A rotary bearing upon nuts mounted on a plurality of jackscrews support the filling stations, whereby the jackscrews are turned in unision via a chain for raising and lowering the filling stations but not their container platforms, for adjusting to different heights of containers. The profile of the track for the cam of the cam controlled pumping mechanism can be changed to program the exit velocity of the fluid in accordance with the viscosity of the fluid.
Claims
What we claim is:
1. In a container filling machine, the combination comprising:
a plurality of container platforms;
a bulk supply tank for storing fluid;
a plurality of piston pumps each including a piston rod;
a plurality of nozzles;
a plurality of valves, each one of said valves being associated with and having an individual piston pump and individual nozzle connected thereto, said nozzle projecting downward from said valve above a particular one of said container platforms;
means for delivering fluid from said bulk supply to said valves;
means for operating said valves to deliver fluid from said bulk supply tank into said piston pumps during a charging cycle, and from said piston pumps into said nozzles during a discharge cycle;
cam controlled pumping means including: a barrel-like pump actuating cam having a track; and cam follower means resting partially within and guided by said track, for providing pumping movement correspondence with the profile of said track; said cam controlled pumping means providing in combination with said valve operating means, greater than 180 of machine time for continuously discharging fluid from said nozzles during the discharge cycle; and
stroke adjusting means including: a plurality of crank levers pivotally connected between said cam follower means and individual ones of said piston rods of said piston pumps, respectively; and means for controlling the pivoting of said plurality of crank levers for providing infinite adjustability in a range between zero and maximum stroke of the stroke of said piston pumps without necessitating changing of the profile of said pump actuating cam.
2. The container filling machine of claim 1, wherein the combination of said cam controlled pumping means and said stroke adjusting means further includes:
a rotatable center column;
an upper rotary plate mounted between said center column and an uppermost portion of said cam;
a lower rotary plate mounted upon said center column below said upper rotary plate;
a plurality of first and second slide shafts mounted between said upper and lower rotary plates, and juxtaposed to said cam and column, respectively, each one of said first and second slide shafts being associated with a particular one of said piston pumps;
a plurality of cam slides, each one of which is mounted upon an individual one of said first slide shafts, for vertical movement thereupon;
a plurality of cam followers rigidly mounted one upon each cam slide, each cam follower having a free end protruding into and guided by said track of said cam;
a plurality of pump slides, each one of which is mounted for vertical movement upon an individual one of said second slide shafts, and rigidly connected to a lower end of an individual one of said piston rods; and
said means for controlling the pivoting of said plurality of crank levers includes: a plurality of pivotal connection means; said plurality of crank levers each being pivotally connected via an individual one of said plurality of pivotal connection means between individual opposing ones of said cam and pump slides, and each one of which contains a slot therein; a plurality of pivotal attaching means; a plurality of coupling means; and a plurality of pivot brackets, each one having an upper end pivotally attached via an individual one of said plurality of pivotal attaching means to a position within the slot of an individual one of said crank levers, and a lower end adjustably coupled via an individual one of said plurality of coupling means to said lower rotary plate.
3. The container filling machine of claim 2, further including means for providing individual adjustment of the stroke of each one of said piston pumps.
4. The container filling machine of claim 3, further including means for providing simultaneous adjustment of the stroke of each one of said piston pumps.
5. The container filling machine of claim 3, wherein said means for providing individual adjustment of the stroke of each one of said piston pumps, includes:
a plurality of adjuster blocks, each one of which is rigidly mounted to the lower end of an individual one of said pivot brackets beneath an opening in said lower rotary plate;
a plurality of stroke adjusting screws, each one of which is threadably mated to and through an individual one of said adjuster blocks;
means for turning each one of said plurality of stroke adjusting screws; and
a plurality of pairs of bearing means rigidly attached to said lower rotary plate, individual ones of said screws being retained by one of said pairs of bearings, with one end of said screws protruding through its respective bearing means for individual connection to said turning means, and when said protruding end is turned by said turning means, its associated adjuster block moves along said screw for positioning the upper end of said pivot bracket in the slot of said crank lever, for changing the stroke of the associated piston pump.
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