SHOWER NOZZLE FOR FABRIC CONDITIONER

摘要

A shower for use in conditioning of felt or wire fabric in papermaking utilizing a two position nozzle. One position is a spray position and the other position is a purge position with the two positions being determined by the relative location of an interior piston with respect to a surrounding tubular body having a valving member at the upper end thereof. The size of the opening created by shifting the position of the piston relative to the valving member determines whether or not a spray or a purging flow passes from the nozzle. The nozzle communicates with the interior of a spray pipe and a volume control is provided in the form of cooperating openings and ports in the tubular body and piston slidably housed therein positioned so that a greater number of openings and accordingly opening area is provided between the interior of the spray pipe and the valving member in the spray position and a lesser number of openings and area of opening is provided for introduction of liquid from the spray pipe to the valving head in the purge position. This action facilitates the use of a single water supply for the nozzle arrangement and facilitates movement of the nozzle between the purge and spray position with the assistance of a spring housed between the piston and to the body of the housing.