Sampling system for processing textile material in a wet condition

Claim 1

A system for controlling the temperature of a treating liquid in a dyeing process in accordance with a predetermined trapezoidal temperature control program which contains a temperature rising, a temperature constant level and a temperature lowering program, for dyeing textile material by the treating liquid comprising: sampling the actual temperature of the treating liquid in order to detect the difference between the actual temperature of the liquid and the temperature represented by the predetermined trapezoidal temperature control program; holding an output signal of an on-off control device produced in response to the detected difference for a holding time by a zero-order holding device within each sampling cyclic period so that the input of the thermal exchanging medium to the dyeing process is held until said holding by said zero-order holding device is almost completed; and changing said holding time within each sampling cylic period in accordance with predetermined exchanginG programs for respective temperature rising, constant level and lowering programs of the predetermined trapezoidal temperature control program while maintaining the magnitude of said input of said thermal exchanging medium at a constant level during each holding period.

Claim 2

A system for controlling the temperature of a treating liquid in a dyeing process in accordance with a predetermined trapezoidal temperature control program which contains a temperature rising, a temperature constant level and a temperature lowering program, for dyeing textile material by the treating liquid comprising: sampling the actual temperature of the treating liquid in order to detect the difference between the actual temperature of the liquid and the temperature represented by the predetermined trapezoidal temperature control program; holding an output signal of an on-off control device produced in response to the detected difference for a holding time by a zero-order holding device within each sampling cyclic period so that the input of the thermal exchanging medium to the dyeing process is held until said holding by said zero-order holding device is almost completed; and changing said holding time within each sampling cylic period in accordance with predetermined exchanginG programs for respective temperature rising, constant level and lowering programs of the predetermined trapezoidal temperature control program while maintaining the magnitude of said input of said thermal exchanging medium at a constant level during each holding period.

Claim 5

A system for controlling the temperature of a treating liquid in each dyeing process for dyeing textile material of a plurality of dyeing processes in accordance with each individual predetermined trapezoidal temperature control program by employing a single on-off control device comprising: sampling the actual temperature of the treating liquid of each dyeing process one after the other within a predetermined scanning period in order to detect a difference between the actual temperature of the liquid of each dyeing process and the temperature represented by the predetermined trapezoidal temperature control program for each said dyeing process; holding an output signal of the on-off control device for a holding time within each cyclic sampling period of each said dyeing process in response to each detected temperature difference by each zero-order holding device provided for said each dyeing process so that each input of the thermal exchanging medium to each said dyeing process is held until said holding by each said zero-order holding device is almost completed; and changing said holding time of each said dyeing process by actuation of one of the scanning signals for commanding scanning of said sampling of the actual temperature of the treating liquid with respect to said plurality of dyeing processes while maintaining the magnitude of each said input of the thermal exchanging medium to each said dyeing process at a constant level respectively during said holding time.

Claim 6

A system for controlling the temperature of a treating liquid in each dyeing process for dyeing textile material of a plurality of dyeing processes in accordance with each individual predetermined trapezoidal temperature control program by employing a single on-off control device comprising: sampling the actual temperature of the treating liquid of each dyeing process one after the other within a predetermined scanning period in order to detect a difference between the actual temperature of the liquid of each dyeing process and the temperature represented by the predetermined trapezoidal temperature control program for each said dyeing process; holding an output signal of the on-off control device for a holding time within each cyclic sampling period of each said dyeing process in response to each detected temperature difference by each zero-order holding device provided for said each dyeing process so that each input of the thermal exchanging medium to each said dyeing process is held until said holding by each said zero-order holding device is almost completed; and changing said holding time of each said dyeing process by actuation of one of the scanning signals for commanding scanning of said sampling of the actual temperature of the treating liquid with respect to said plurality of dyeing processes while maintaining the magnitude of each said input of the thermal exchanging medium to each said dyeing process at a constant level respectively during said holding time.