Abstract: The present invention relates to a stock re-pulper designed to macerate stock put into a stock tub. The stock re-pulper comprises first and second porous plate disposed in the stock tub and respectively having first and second holes, first macerating blades disposed to confront one surface of the first porous plate and made to be rotated in proximity to a first open area of the first porous plate, second macerating blades disposed to confront one surface of the second porous plate in proximity to a second open area and made to be rotated concentrically with respect to the center of rotation of the first macerating blades, and a pump blade disposed to confront the other surface of the first porous plate in proximity to the first open area and made to be rotated concentrically with respect to the center of rotation of the first macerating blades.

Abstract: The present invention is a pulp screening device which is capable of screening a large quantity of pulp with low power, by preventing clogging of a screen cylinder. The device is provided with one or a plurality of vanes which revolve within an agitation chamber formed between a pair of inner and outer screen cylinders, holding a predetermined small space from each of the inner and outer screen cylinders. The agitation chamber is practically partitioned in the circumferential direction by the vanes.

Abstract: The present invention is a pulp screening device which is capable of screening a large quantity of pulp with low power, by preventing clogging of a screen cylinder. The device is provided with one or a plurality of vanes which revolve within an agitation chamber formed between a pair of inner and outer screen cylinders, holding a predetermined small space from each of the inner and outer screen cylinders. The agitation chamber is practically partitioned in the circumferential direction by the vanes.