Patent GB-469017-A (GB)
Title: Improvements relating to apparatus for filling collapsible tubes with pastes, semi-liquids, or liquids
IPC: B65B39/00
Filed: 1936-01-13
Abstract: 469,017. Filling collapsable tubes. DAY, W. H. Jan. 13, 1936, No. 1109. [Class 125 (ii)] Apparatus for filling collapsable tubes with pastes, semi-liquids or liquids comprises valve controlled arrangements for delivering the material to a filling nozzle for the tubes, in which an auxiliary valve is provided in addition to the usual slide valve which controls the flow from the measuring cylinder to the nozzle, this auxiliary valve being located at or adjacent the lower or supply end of the nozzle, and mechanism for opening and closing the auxiliary valve provided within a member carrying the nozzle and operatively connected to the auxiliary valve by a member extending downwardly through the nozzle. For stiff pastes a rotary worm or screw pump, fed from a hopper if desired by a feeder of the claw type, forces the material into the inlet of the plunger pump associated with the measuring cylinder. The material is contained in a hopper fitted with rotatable propeller blades 2 which agitate the material and tend to force it downwardly through aperture 10 into a feeder comprising a casing 11 and two sets of overlapping claw wheels 12, 14 which remove material from the hopper and supply it into the casing 20 of a rotary worm- or screw-pump, Fig. 5. The claw wheels 12, 14 are cleaned against walls 23, 24 so that they do not return material to the hopper. The worm 25 of the pump feeds the material along casing 20, ribbed at 35, through openings at the end into conduit 34 leading to the delivery plunger pump comprising a casing 36, pump plunger 37, and rotary valve 38 controlling communication on one hand through aperture 39 between conduit 34 and cylinder 36, and on the other through aperture 40 between, cylinder 36, and tube filling nozzle 41. When valve 38 establishes communication between conduit 34 and cylinder 36, the cylinder is cut off from the nozzle 41. Plunger 37 then moves to the right to fill the cylinder with material. Valve 38 then rotates through the intermediary of a member 61 actuated from a suitable shaft of the filling apparatus, and plunger 37 moves to the left to drive the contents of the cylinder into nozzle 41 and into the tube to be filled. A small valve element 42 co-operates with a seat within the aperture 43 of nozzle 41. This is operated by suitable cam mechanism to open or close the aperture at the right time. A cam 44 is driven by bevel wheels 45 from a shaft 46 of the filling apparatus and co-operates with a roller 47 carried by a rod 48 guided in a recess 49 of a member 50 of the apparatus. The rod 48 carries a member 51 connected by an adjustable link 52 with an arm 53 carried by a shaft 54 extending through a packing gland into the nozzle holder 55, and carrying a pinion 56 co-operating with a rack 57 couple to the valve element 42. A spring 60 keeps roller 47 in contact with the cam 44. The cam is preferably arranged to close the aperture 43 just after the rotary valve 38 has closed communication between cylinder 36 and nozzle 41. The auxiliary valve 42 may be used in conjunction with arrangements, e.g. as described in Specification 363,762, for withdrawing the final remnants of material from the nozzle.