DE958424C - Foam generator - Google Patents

Description

ISSUED FEBRUARY 21, 1957

W 94.05 III 133 c

Rudolf Weber, Darmstadt

has been named as the inventor

Wella Aktiengesellschaft, Darmstadt

Foam generator

Patent application published on August 23, 1956

Patent issued January 31, 1957

For foam generation from liquid. Media are generally agitated or propeller-like Used structures that are driven by an electric motor. In some cases the Whorl only from the extended motor shaft of the electric motor, into which a helical one Groove is milled; in other cases a wire is attached helically to the axle. These facilities are relatively costly because they are expensive, especially the arrangement demanding sealed electric motors, and cumbersome to operate because the bearings of the Electric motors and possibly the collectors require maintenance; they are therefore also suitable not for inexpensive mass production.

Now a device has already been manufactured for mixing, stirring and emulsifying in which the Mixing elements of an alternating current fed electromagnet in mechanical vibrations be moved.

The invention also uses such a vibrator to generate foam, especially soap foam, to create. It does not matter whether the electromagnet is connected to an alternating current network or whether chopped up Gleidhstrom is fed to it. While with the known Device of the armature of the electromagnetism arranged in this way is that the. The surface of the liquid is almost calm and the liquid does not splash is, the anchor according to the invention is so

arranged so that the liquid turns into foam on the surface and over the surface of the liquid out to the top. Appropriately, the anchor is arranged so that it is in a container, which is partly with the Medium to be missed is partly filled with air, about half in the air space and; to the Half is in the medium to be foamed; generally that is above the medium ίο the air out. In certain cases, however, it can be advantageous to have a special air supply to arrange. According to a further embodiment of the invention, the foam generator can with be provided with a 'mouthpiece for removing the foam; here the mouthpiece is movable and connected to a switch to turn the device on and off. Furthermore, a electrical heating can be provided, which preheats the medium to be foamed. Also the The heating can be switched on by moving the foam dispensing nozzle via a switch will.

Exemplary embodiments of the invention are shown in the figures.

Fig. Ι shows schematically a container a, which is filled with a liquid medium b. The liquid level is indicated at c. In this container or in the liquid medium, an electromagnet d with supply line e is arranged in such a way that the electromagnet d with its armature f extends approximately half into the air space g and the other half into the space b filled with liquid medium. If the electromagnet d is excited by alternating current or chopped direct current, the armature f will vibrate accordingly. The armature f expediently consists of a plate which can be pivoted about the pivot point h. If necessary, a non-magnetizable plate i can be arranged on the end faces of the electromagnet, so that the liquid medium which mixes with the air is sprayed between the two plates i and /. The foam generated lies above the liquid level c and rises in the container α upwards so that it can be skimmed off. The plates / and i can optionally have perforations. In general, a frequency of 50 Hertz is sufficient. However, nothing stands in the way of choosing other frequencies, depending on the liquid medium that is to be foamed, in order to increase the efficiency of the system.

According to Fig. 2, the electromagnet d can also be fixed in the container α. The armature f is resiliently attached to a wall of the container α with respect to the electromagnet. Here, too, the part of the electromagnet opposite the armature / opposite can be provided with a non-magnetizable plate. This plate can also be used for the liquid-tight sealing of the electromagnet d .

Fig. 3 shows a further embodiment in which the electromagnet d is located outside the wall of the container σ. The armature / the electromagnet is attached at k and / so that it can follow the vibrations of the electromagnet ei. With the container α a storage container W is structurally combined in the manner as it is, for. B. for drinking water tanks for poultry. The tight reservoir m ensures that the liquid level c always assumes the same height. The foam generated by the vibrator rises in the container α . The container is covered by a removable lid, but has an outlet opening 0. In this opening 0 there is arranged a funnel-like mouthpiece q pivotable about the pivot point p . This pivotable mouthpiece q can be pivoted downwards by a ring or other handle.

This allows the foam to be removed through the mouthpiece q. With the movement of the mouthpiece q , a switch s is actuated, which switches the vibrator on and off. By means of a counterbalance or a spring, the mouthpiece q can be pivoted upwards when not in use, the foam remaining in the mouthpiece flowing back into the container α and the switch switching off the electromagnet. In the case of an electrically operated whisking machine for producing foam, it is already known to attach a swiveling drip cup under a fixed outlet mouthpiece. The machine is switched on by pressing against this drip cup.

Figs. 4 and 5 show similar arrangements in which the vibrator after in a vertical manner Kind of an immersion heater is introduced into the liquid medium. The movable anchor is here arranged horizontally; he can have breakthroughs.

To produce particularly dense foam, such as. B. shaving foam, it is necessary that the Containers are sealed to pressurize foam generation. Is expedient it 'here, as already mentioned, to provide a special air supply, the promotion of which is known per se Way can also be done by an electromagnetically controlled diaphragm pump. These can optionally be structurally combined with the vibrator. If necessary, can be used to distribute the supplied air can be arranged in a known manifold.

In some cases it is necessary for the foam to be given a certain temperature. To this Purpose known electric heating devices can be provided that together can be switched on and off with the vibrator. If necessary, the apparatus can be as small as that Dimensions are kept that it serves as a handset and z. B. in the production of shaving foam is used directly to distribute the foam on the areas to be shaved.

Claims (6)

PATENT CLAIMS: i. Foam generator with an alternating current fed electromagnet, whose oscillating Anchors for the mechanical influence of Media is used, characterized by a partially with air, partially with that to be foamed Liquid-filled vessel in which the armature of the electric magnet is arranged in such a way that it absorbs both the air and the touched medium to be foamed. 2. Foam generator according to claim i, characterized in that the electromagnet is outside of the space or container filled with the liquid to be foamed while the anchor is within the liquid, the wall of the Space or container made of non-magnetizable material. 3. Foam generator according to claim 1, characterized in that opposite the anchor, the can be plate-shaped, a second, made of non-magnetizable material Plate is arranged, which is connected to ..- the leg ends of the electromagnets can be. 4. Foam generator according to claim 1, characterized in that the Sdhaumgenerator with a movable mouthpiece is connected, both for foam removal as well as for the reflux unconsumed foam is used. 5. Foam generator according to claim 4, characterized in that the mouthpiece with a On and off switch is connected. 6. Foam generator according to claim 5, characterized in that the switch simultaneously is used to switch on electrical heating devices. Considered publications: German Patent Nos. 638726, 837758; Advertisement from Bopp & Reuther G. m. B. H., Mannheim, in Chemistry — Engineering — Technology, June 1952, p.306; Brochure from Bopp & Reuther, No. Me 269; "The Pharmaceutical Industry", No. 3, March 1952, special print by Bopp & Reuther, S Me 2. 1 sheet of drawings © 609 580/38 8.56 (609 802 2.57)