Sandoz Gmbh

Roland Walliser

Rolf Hasler

Jose Carbonell

The present invention relates to a novel exhaust-dyeing process to obtain level dyeings which is characterized by the step of regulating the parameters that affect the rate of adsorption of the dye onto the substrate in order to prevent the rate of bath exhaustion as a function of the number of cycles of dye liquor and/or substrate from exceeding a predetermined limit. The invention also relates to an apparatus for effecting said process.

Apparatus useful in exhaust dyeing

The present invention relates to a novel exhaust-dyeing process to obtain level dyeings which is characterised by the step of regulating the parameters that affect the rate of adsorption of the dye onto the substrate in order to prevent the rate of bath exhaustion as a function of the number of cycles of dye liquor and/or substrate from exceeding a predetermined limit. The invention also relates to an apparatus for effecting said process.

Method and apparatus for regulating the rate of dye adsorption by the

The present invention concerns a novel method of winding bobbins having a predetermined radial fluid permeability which comprises winding yarn or fabric on a hollow permeable core, passing a fluid radially through the windings on the core and terminating the winding when a predetermined fluid pressure is attained, and an apparatus therefor. Said method and apparatus enable 'bobbins' to be uniformly dyed.

Method and apparatus for winding bobbins

The invention concerns a novel automatic metering system for producing a liquor containing a predetermined concentration of at least one component thereof, which comprises a mixing tank in which the liquor components are mixed, a metering device adapted to meter out at least one of the components into the mixing tank, an analyzer adapted to measure the concentration of the component(s) required at a predetermined concentration and a data processing unit, with an input from the analyzer and an output to the metering device, being programmed to effect an operational cycle which comprises computing the deviation of the measured concentration from the predetermined concentration of the component(s), correlating the deviation with the amount of at least one of the components necessary to be metered out, substantially to reduce said deviation by a reduction factor of less than 100 percent, and automatically operating the metering device to meter out the correlated amount, and to repeat said operational cycle until the predetermined concentration has been substantially reached, and a method of operating the system.

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Rixheim, France

Roland Walliser