US 5,006,995 AGranted

Automatic weighing plant for dyes in powder form

AssigneeColor Service SRL

InventorsFabrizio Toschi, Fabio Toschi

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Abstract

A plant for the automatic weighing of dyes in powder form controlled by a computer for the preparation of mixtures for the dyeing industry comprising a plurality of hoppers containing the dyes, said hoppers being placed one beside the other, each being provided with pipe systems for the introduction of the dyes into respective loading hoppers provided with a lower conveyor chute for the withdrawal and introduction of the dye from the hoppers into a mixing and weighing container. When the conveyor chute is set into rotation, it withdraws the dye from the hopper and deposits it on the plate of the scale. The rotational speed of the chute is variable and it gradually decreases as the value weighed by the scale approaches the required weight value. The quantity of dye to be withdrawn and the withdrawing sequences are recorded and memorized in a computer which controls the operation of the plant.

Claims8

Dependent claims

A weighing plant for use with a computer system for the weighing of dyes in powder form for the purpose of preparing dye mixtures, which comprises

a plurality of loading hoppers,
a plurality of dye drums adapted to contain dye in powder form,
a pipe system providing communication between each of the dye drums and corresponding loading hoppers,
a vacuum system for drawing the dye from the dye drums, through the pipe systems and into the loading hoppers,
a conveyor chute rotatably disposed within the lower portion of the loading hopers, said conveyor chute extending from the inside to the outside of the loading hopper for removing the dye powder therefrom,
an electronic scale for selectively moving in logic succession under the loading hoppers for weighing the dye color removed from each of the loading hoppers, and
motor transmission means for moving from one loading hopper to another for operatively and relatively engaging the conveyor chutes of respective loading hoppers,
said computerized system controlling the logical succession of displacement of the electronic scale under each loading hopper, and the speed and duration of rotation of each conveyor chute whereby a dye mixture is obtained in accordance with the instructions introduced by the operator.

5 more elements

Dependencies are inferred from the claim text.