Moisture control system for controlling the amount of chemical added to a fabric

The method for controlling the amount of chemical added to a fabric in a moisture control system comprising the following steps:

• arranging a vacuum means with respect to a fabric so as to be able to apply a vacuum thereon;
• providing a source of liquid including a predetermined percentage of chemical therein to be added to the fabric;
• applying liquid from the liquid source to the fabric;
• advancing the fabric containing liquid to the vacuum means;
• calibrating the vacuum means to provide a predetermined vacuum which is a function of the chemical concentration of the liquid and the composition of the fabric;
• applying said predetermined vacuum to the fabric to deliquefy the fabric;
• sensing a change in the vacuum and air flow relationship;
• and adjusting the vacuum provided by the vacuum means responsive to the sensed change to return the vacuum to the predetermined amount of vacuum thereby maintaining a constant moisture level and accordingly amount of added chemical in the fabric.

The method for controlling the amount of chemical added to a fabric in a moisture control system comprising the steps of:

• arranging a first suction pipe having a slot therein and a vacuum means interconnected thereto by conduit means, with respect to a fabric positioned to pass over the slot;
• providing a first source of liquid including a predetermined percentage of chemical therein to be added to the fabric;
• applying liquid from the first liquid source to the fabric;
• advancing the fabric containing liquid from the first liquid source over the first suction pipe and applying vacuum thereto to deliquefy the fabric;
• setting the vacuum means to provide a predetermined vacuum at the slot depending on the chemical concentration of the liquid and the composition of the fabric;
• sensing a change in vacuum at the slot in the first suction pipe and actuating a first vacuum controller to permit the vacuum means to maintain a constant vacuum at the first suction pipe and thereby maintain a constant moisture level and accordingly amount of added chemical in the fabric.

A moisture control system for controlling the amount of chemical added to a fabric comprising:

• a first pipe having a slot therein;
• vacuum means;
• conduit means connecting the suction pipe to the vacuum means;
• a first liquid supply means including a predetermined percentage of chemical therein to be added to the fabric;
• means for advancing the fabric containing liquid from the first liquid supply means over the first pipe whereupon vacuum is applied thereto to deliquefy the fabric;
• the vacuum means adapted to be set to provide a predetermined vacuum at the slot depending on the chemical concentration of the liquid and the composition of the fabric;
• sensing means for sensing a change in vacuum demand at the slot of the first suction pipe, the conduit means including a vacuum controller;
• the sensing means connected to the first suction pipe and the vacuum controller so that sensing of a change in vacuum in the first suction pipe will actuate the vacuum controller and permit the vacuum means to maintain a constant vacuum at the first suction pipe and maintain a constant moisture level and amount of added chemical in the fabric;
• a second suction pipe is positioned with respect to the fabric and the first suction pipe so that the fabric is first passed over the second suction pipe having a conduit means connecting the second suction pipe to the vacuum means including a second vacuum controller operable to selectively interconnect the vacuum means with the second suction pipe and apply vacuum to deliquefy the fabric passing thereover;
• the first liquid supply means being positioned between the first and second suction pipes;
• a second liquid supply means positioned so that the second suction pipe is between the first and second liquid supply means in the direction of travel of the fabric;
• said second liquid supply means including a liquid shower for depositing a predetermined amount of liquid on the fabric before it passes over the slot in the second suction pipe;
• an arrangement of pull rolls between the second suction pipe and the first liquid supply means for further dewatering the fabric after it leaves the second suction pipe and for guiding the fabric through the first liquid supply source and comprising the fabric after it exits from the second liquid supply means to dewater the fabric;
• and guide rolls for guiding the fabric over the slot in the first suction pipe and directing the fabric from the first suction pipe.

The method for controlling the amount of chemical added to a fabric in a moisture control system comprising:

• arranging a first suction pipe having a slot therein and a vacuum means interconnected by conduit means with respect to a fabric positioned to pass over the slot of the first suction pipe;
• providing a first source of liquid including a predetermined percentage of chemical therein to be added to the fabric;
• applying liquid from the first liquid source to the fabric;
• advancing the fabric containing liquid from the first liquid source over the first suction pipe whereupon vacuum is applied thereto to deliquefy the fabric;
• setting the vacuum means to provide a predetermined vacuum at the slot of the first suction pipe depending on the chemical concentration of the liquid and the composition of the fabric;
• sensing a change in vacuum demand at the slot in the first suction pipe and actuating a vacuum controller to permit the vacuum means to maintain a constant vacuum at the first suction pipe and thereby maintain a constant moisture level and amount of added chemical in the fabric;
• providing a second suction pipe and positioning it with respect to the fabric and the first suction pipe;
• providing a second circuit means connecting the second suction pipe to the vacuum means, the second conduit means including a second vacuum controller operable to selectively interconnect the vacuum means with the second suction pipe and apply vacuum to deliquefy the fabric passing thereover;
• positioning the first liquid source between the first and second suction pipes;
• providing a second liquid source positioned so that the second suction pipe is between the first and second liquid source in the direction of travel of the fabric;
• providing the second liquid source in the form of a liquid shower for depositing a predetermined amount of liquid on the fabric before it passes over the slot in the second suction pipe;
• providing an arrangement of pull rolls between the second suction pipe and the first liquid source for further dewatering the fabric after it leaves the second suction pipe and for guiding the fabric through the liquid supply source, compressing the fabric after it exits from the first liquid source to dewater the fabric, and providing guide rolls for guiding the fabric over the slot in the first suction pipe and directing the fabric from the first suction pipe.