Method and apparatus for discontinuous applications, at a constant pitch, of controlled quantities of absorbent material in granules

摘要

A device (20) suitable for transforming a continuous and controlled flow (320) of absorbent material in granules (310) into an intermittent flow (250) for providing to receiving means (50, 60) movable along a direction X, comprising a feed manifold (210), an outlet nozzle (500) and a main body (200), placed between said feed manifold (210) and said outlet nozzle (500), configured to cause said absorbent material in granules (310) to flow along a direction (Y′-Y′) coinciding with the respective axes of symmetry of said feed manifold (210), said outlet nozzle (500) and said main body (200); wherein within said main body (200) a movable element (240) is housed, capable of moving alternately between a first and a second working position, in such a way that when said movable element (240) is located in the first working position, it forms a first accumulation chamber (230) of the absorbent material in granules (310) fed in a continuous manner (320), and a first discharge duct (233) of said material (310), and when said movable element is in the second working position, it forms a second accumulation chamber (251) and a second discharge duct (253).

主权项

1. A method for intermittently applying a flow of granular material on a sheet, comprising:
advancing a continuous sheet; providing a continuous and weight-controlled flow of granular material; providing a main body having an inlet mouth, an outlet nozzle, a hollow chamber between the inlet mouth and the outlet nozzle, and a movable element housed in said hollow chamber which oscillates between a first and a second working position, the movable element in said first and second working positions forming in said hollow chamber a first accumulation chamber and a first discharge duct, and a second accumulation chamber and a second discharge duct, respectively; alternately moving said movable element between said first and second working positions while feeding said continuous and weight-controlled flow of granular material to said inlet mouth of said main body, so as to alternately fill said first and second accumulation chambers; alternately expelling the granular material contained in said first and second accumulation chambers through said first and second discharge ducts; and applying said granular material discharged through said first and second discharge ducts to said advancing continuous sheet.