Patent GB-691857-A (GB)
Title: Automatic closure device for liquid receptacles
IPC: B65D47/28
Filed: 1949-10-25
Abstract: 691,857. Stoppers. RATHSPRECHER, D. Oct. 25, 1949, No. 27403/49: Class 125(iii) [Also in Groups XXVIII and XXIX] A closure device 1 for receptacles 2 comprises a distributer member 3 which closes an opening in or forms part of the receptacle wall, is formed so that its outer surface forms a seat surface 4 inclined relative to the axis of the distributer, and is provided with at least one outlet orifice located in the seat surface and communicating by means of a delivery passage 5 with the interior of the receptacle, the outlet orifice being controlled by a closure element 8 slidable on the distributer and actuated by a spring 10, 14 which holds the closure element in the closed position, the closure element being mounted on the distributer independently of the spring and actuated by the latter so as to return automatically from the extreme open position to the closed position. In Fig. 1 the closure screws on to the neck of the bottle 2, and the distributer has a liquid outlet 5 and air inlet 6 which open at the top into the inverted cone-shaped seat 4. The inlet 6 may be extended by an.immersion tube 7. The sleeve 8 is lowered to pour the contents, and when released assumes the normal closed position. The rod 3 may be formed in two parts with the lower part integral with the screw cap'and the upper part connected thereto, e.g. by slug and socket joint. The sleeve, in the example shown in Fig. 2, rotates about the rod 3, the rotation being limited by stops and urged in one direction by the spring 14 connected at opposite ends to the sleeve and the rod. To pour the contents the sleeve is rotated until the cut away portions 12, 13 coincide with the openings of passages 5, 6, and when released is rotated by the spring so that the parts are again closed. The sleeve may have a handle or ribs 18. The contents are delivered in drops if the bores 5, 6 are small or if small bore tubes are fitted thereto. The contents may be delivered in doses or as a vapour by a construction such as that shown in Figs. 5 and 7, in which a pumping action is performed by the sleeve. The rod 3 has the passage 5 and a further passage 22 which connects the interior of the receptacle with the chamber 19, and is fitted with a retaining valve 23 which opens into the receptacle and prevents escape of liquid. The chamber 19 is sealed at each end by packing rings 20, 21, and when the receptacle is inclined and the sleeve pressed the air in chamber 19 enters the receptacle and a given quantity of liquid is expelled through passage 5. The rod 3 may be formed in two parts. The rod 3 in Fig. 7 has a passage 28 sealed at 31, opening into the chamber 19 by the orifice 29 and into the seat 4 by the vaporising orifice 30, and a passage 32 opening into the orifice 30 and connected to a tube 33 which extends into the liquid. When the cap 8 is pressed down air from chamber 19 escapes through 29, 28, 30, and by suction causes liquid to rise in passage 32 and form a vaporised jet, air entering the chamber 19 through passage 34. Alternatively, the device may be applied to the receptacles as a conventional conical stopper when it may be removed and used as an applicator, or may form the upper part of small receptacle. In a further construction the device is fitted with a vaporising chamber and passages and also the normal pouring passage 5, Fig. 9, shows an inverted arrangement having an upright conical seating 35 on the cap which is extended by a tube 36 open at the upper end and surrounded by sleeve 37. A ring 38 on the lower end of the sleeve has a seating surface 39 and can slide under moderate friction on the tube 36. The cap has the pouring orifice 5 and a vaporising passage 28 connecting the tube 36 with the orifice 30 on the seat 35 and opening to the receptacle by passage 32. A sealing ring 41 is mounted on the tube 36 between rigid rings 40, and a spring 10 fitted between rings 38 and 40. By raising the sleeve slightly the pouring passage 5 may be used, and by a repeated sumping movement of the sleeve the liquid is vaporised through the orifice 30.