GB190213271A - An Improved Method of and Apparatus for Controlling the Delivery of Viscous Liquids, in Measured or other Quantities, Chiefly Designed for use in Filling Jars, Tins and other Receptacles with such Liquids. - Google Patents

Abstract

13,271. Mendham, C. F. June 11. Measured quantities, delivering.-Treacle, syrups, tar, paint, birdlime, heated pitch, and other viscous liquids are forced from a cylinder c so as to flow out through an annular valve m which cuts off sharply and is supplied with an annular current of air to prevent the substance from adhering. The valve seat n is fitted into the lower side of the passage h from the cylinder, in the bevelled mouth of a short perforated delivery tube j which crosses the passage and screws into a collar on its upper side. The valve is the sharply bevelled end of a tube m, which extends down from a piston s in a cylinder r, and contains a tube p to form an annular passage for air from the underside of the piston where the valve tube has holes t. The piston can be lifted but not lowered by means of a rod x, which can be raised and lowered with a screw sleeve w by means of a lever 3, and which can be screwed up and down through the sleeve. A spring v intervenes between the piston and the bottom of the sleeve w, and a spring bolt 11 is provided to engage a collar 10 on the valve tube when raised. The lever 3 forms part of a three-armed lever which is connected by a link 8 to the slide valve of the forcing cylinder and by a link 19 to a bell crank 17 which can draw the bolt. On pulling the hand-lever 5 from the position shown towards the left-hand, the slide-valve g is moved so as to close the port e and open the port f ; at the same time the valve m is opened and held in its opened position by the detent 11. Liquid under pressure from the supplypipe b then enters the cylinder c and, acting through the piston d, forces the liquid out through the passage h and delivery-tube j until the head 15 of the piston-rod reaches the bell crank 17, whereupon the spring v is compressed, and, when such compression has reached a suitable degree, the detent 11 is tripped. The valve m then descends under the action of the spring v, and the piston s compresses the air in the lower part of the cylinder r and forces it out through the annular nozzle at the bottom of the valve m on to the valve-seat n so as to cut the liquid column and prevent the formation of dropping strings of liquid. The air, after impinging on the seat n, is drawn up through the interior of the pipe p to the space on the upper side of the piston s, thus preventing excessive pressure in the hollow upper part of the column of liquid before it is cut. In a modified form of apparatus, an auxiliary annular nozzle is arranged around the exterior of the orifice of the delivery-tube j, and with this arrangement the valve may be made solid and open downwards.