US2051440A - Device for atomizing powder - Google Patents

Description

Aug. 18, 1936. H. EICKEN DEVICE FOR ATOMIZING POWDER Filed Oct. 4, 1955 Patented Aug. 18, 1936 DEVICE FOR. ATOMIZING POWDER.

Hermann Eicken, Cologne, Germany Application October 4, 1935, Serial No. 43,643 In Germany June 11, 1935 4 Claims.

Despite careful manipulation of the hand-ball, it sometimes easily happens that the blowing nozzle of the well-known powder atomizers sets considerable quantities of the powder supply in an upward motion in the form of pellets with the first pufi of air, and throws them against the lower surface of the exhaust sieve. In this manner, therefore, not only are the openings for the normal air-dust current clogged up by the material in this form, but a part of these dust pellets are ejected without being reduced to a smaller size with the result that clothing or other objects are soiled.

In addition, the blowing of dust on to body surfaces which are more or less steep with the already known similar devices is rendered difficult because the exhausting sieve of the device is directed upwards in the axial direction of the device. Of course, the thought immediately occurs of directing the air-dust current against such surfaces as well simply by holding the device at more or less of an angle; however, the whirl-pool effect produced by the above mentioned blowing tube is much more difficult to adjust when necessary in the tilted position than in the vertical position.

The present invention eliminates these de--.

flciencies because the exhaust sieve in the outer closing-01f cap of the powder supply container is not located radially across from the opening of the latter, but in its side wall and is installed in a lateral direction, whereas the end wall of the cap is arranged as a rebounding surface which is directed at an angle to the axis of the container and to the exhaust sieve. In this way it is brought about that the pellet-formed quantities of dust which are otherwise shot directly through the exhaust sieve in an upward direction by the stream issuing from the blowing nozzle, are prevented from striking the exhaust sieve directly, and are directed against the oblique rebounding surface beforehand.- As far as these pellets are not converted to the dust form, they fall back after losing their momentum into the supply container. Therefore, only the finely divided dust which is floating in the issuing stream of air can be carried through the openings of the sieve. In this manner, the position of the exhaust sieve at the side of the issuing cap makes it possible to concentrate the dust stream at the desired place even in the case of vertical surfaces, and to avoid the useless and annoying flying around of dust in the undesired directions.

Figure 1 of the drawing represents a vertical section and Figure 2 shows a lateral view of the upper part of the invention.

The rubber ball I is provided at its mouth with a rim protuberance which fits into a flat ring groove 3 of the powder container 4 which is sunk into the interior space of the hand-ball. The powder container consists preferably of glass and its lower part is traversed with an air tube 5 in the longitudinal direction which is in connection with the lower air space of the rubber ball, whereas the upper end of this tube narrows down to a goose-necked blowing nozzle 6 which is bent downward. The upper rim of the powder container which extends beyond the rim protuberance of the hand-ball has been designed as a thread support I to which the lower rim of the metallic screw cap 8 fits. The latter is provided above the terminal rim of the thread support with a fastening 9 and a packing ring I. The interior space of the screw cap which lies above this fastening is closed off at the end by an obliquely located deflecting or rebounding surface Il, whereas a short cylindrical support 12 is pressed out of the cylindrical side surface of this end part of the screw cap, of which the opening I3, located opposite said deflecting surface it, is closed off by the sieve H which is made of wire mesh or similar material. On the inside this sieve is held by a metallic ring l5 and is secured in the frame of the support H.

The air stream which issues from the blowing nozzle when the rubber ball I is pressed is driven against the powder supply It which. fills the lower part of the powder container. In this way, a part of the powder is whirled up in highly divided form, whereas other parts, especially when the ball is pressed together strongly, are carried upward by the air stream in an undivided condition While the air stream turns more or less upwards on the surface of the powder supply itself. Those parts of the powder which are in the form of pellets either strike against the oblique rebounding surface II and are finely divided, or they fall, after having lost their momentum, back again into the supply space. Therefore the air stream issuing laterally from the mesh of the sieve It contains only a finely divided powder dust, even when the manipulation of the rubber ball is carried out impetuously and with little care, and the forcefully issuing stream of air and finely divided dust opening is attached.

2. A powder atomizer comprising a powder 1 container having a lateral discharge outlet at its top and a deflecting surface located adjacent to said outlet for directing particles of.

powder flowing from the container toward said outlet back into the container, a blow tube disposed within the container and having a lower inlet end opening exteriorly through the container and having an upper discharge end located above the level oi. the powder in the container and provided with a nozzle arranged to direct air downwardly against the powder in the container, and a pressure through said blow tube.

bulb for forcing air 3. A powder atomizer comprising a powder container having an upper normally open end, a cap closing said normally open end of the container and provided at one side with a discharge outlet, said cap having a wall portion disposed above and opposite said outlet for deflecting particles of powder flowing from the container toward said outlet back into the container, a blow tube i posed within the container and having an inlet end opening outwardly through the container and an upper discharge end provided with a discharge nozzle bent to discharge air down against the powder in the container, and a pressure bulb for forcing air through said blow tube.

4. A powder: atomizer comprising an elastic air forcing receptacle, a powder container disposed in said receptacle and having an upper normally open end projecting outwardly from the receptacle, a cap closing the-normally open end of thecontainer and provided at one side with a discharge outlet and having a wall portion disposed above and opposite said opening for deflecting particles of powder flowing from the container toward the discharge outlet back into the container, and a blow. tube extending longitudinally within the container and having an inlet end in open communication through the bottom thereof with the elastic air forcing receptacle and having at its upper end a. discharge nozzle located above the level of the powder in the receptacle and bent so as to direct air downwardly against the powder in the receptacle. I HERMANN EICKEN.

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