(57) Apparatus includes a self-service color metering device for introducing dosed colored
pigments into a neutral product contained in a container (5). The color metering device
(100) includes a plurality of tanks (1) containing the colored pigments, connected
to a corresponding number of delivery needles (3), situated in a coloring chamber
(4). The container (5) has a cover (50), with a window (15) made therein, closed by
a membrane (150) of elastomeric material. The container (5), together with . the cover
(5), is placed on the plate (80) of a weighing machine (8), situated inside the coloring
chamber (4).
After the user has entered necessary data and has prepaid the operation by suitable
means of the color metering device (100), the raising means (18) raise the weighing
machine (8) and the container (5), so that the delivery needles (3) pierces the membrane
(150) and enter the container (5), to deliver said colored pigments. Afterwards, the
container (5) is lowered, the holes of the membrane (15) close spontaneously, and
the user can withdraw the container (5) with the product colored as required.
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