Abstract: Apparatus for checking the valves of aerosol containers for tightness, in which a vacuum is produced under the valve being checked by pressing the valve by its shut-off member in the open position against a resilient member on a seat in order to deform the resilient member which, after removing the force of pressing and closing the valve, tends to return to the initial position, thereby increasing the volume of the cavity under the valve. This permits reducing the time of exposing the valve to the vacuum. The seats are made blind and are arranged on an endless conveyor which moves the seats with the valves to the mechanisms effecting the operations.

Abstract: A method and apparatus for assembling an aerosol valve which are intended to assemble a valve made up of a valve body, a spring, a stem, a sealing disk and valve cap. In assembling the valve, two vertically disposed sets formed in sequence are indicated by a first "sealing disk-valve cap" set and a second "valve body-spring-stem" set. The sets are disposed one above the other so that their original orientation is retained, and are brought together so as to place the components into a specified position relative to each other in the valve, then the sets are interlocked by deforming the valve cap. In the apparatus employing the method, namely in a mechanism for bringing the sets together, a tip adapted to grip, transfer and dispose the first set above the second one is provided. By virtue of such an arrangement, the assembling of valves involves a minimum of operations and a high-capacity apparatus has been developed.