Dispenser for containers

Claim 1

A DISPENSER FOR A CONTAINER, COMPRISING A BODY HAVING AN ANNULAR UPSTANDING WALL DEFINING A CHAMBER AND AN INTEGRAL BOTTOM FLANGE PROJECTING RADIALLY INWARDLY OF SAID WALL, THE INNER EDGE OF SAID FLANGE DEFINING AN APERTURE ADAPTED TO PROVIDE COMMUNICATION BETWEEN THE INTERIOR OF SAID CONTAINER AND SAID CHAMBER, AND A TWOPART PLUNGER SLIDABLY MOUNTED IN SAID BODY, SAID PLUNGER INCLUDING AN UPPER PART SLIDABLY MOVABLE WITHIN SAID CHAMBER IN CONSTANT INTIMATE SEALING CONTACT WITH THE UPPER REGION OF SAID WALL AND A LOWER PART MOVABLE IN SAID APERTURE IN SLIDING CONTACT WITH SAID EDGE OF SAID FLANGE, SAID UPPER PART HAVING A DISPENSING PASSAGE IN CONSTANT COMMUNICATION WITH SAID CHAMBER, SAID LOWER PART HAVING AN END PORTION PROVIDED WITH A FLOW PASSAGE IN CONSTANT COMMUNICATION WITH THE INTERIOR OF SAID CONTAINER, AND A PORTION INTERMEDIATE SAID END PORTION AND SAID UPPER PART, SAID INTERMEDIATE PORTION HAVING AN IMPERFORATE OUTER SURFACE AND ADAPTED TO MAKE INTIMATE SEALING CONTACT WITH THE EDGE OF SAID FLANGE TO CLOSE SAID APERTURE, SAID PLUNGR BEING MOVABLE TO AN OPEN POSITION WHEREAT SAID IMPERFORATE PORTION OF SAID LOWER PART IS WITHDRAWN FROM SAID APERTURE AND SAID PASSAGE IN SAID END PORTION IS MOVED INTO COMMUNICATION WITH SAID CHAMBER TO PERMIT MATERIAL FLOW FROM THE INTERIOR OF SAID CONTAINER INTO SAID CHAMBER AND OUT THROUGH SAID DISPENSING PASSAGE, SAID PLUNGER ALSO BEING MOVABLE TO A CLOSED POSITION WHEREAT SAID IMPERFORATE PORTION BLOCKS SAID APERTURE AND SAID PASSAGE IN SAID END PORTION IS MOVED OUT OF COMMUNICATION WITH SAID CHAMBER.