Squeeze-type dispensing head

Claim 1

A SUBSTANTIALLY RESILIENT DISPENSING HEAD FOR A CONTAINER COMPRISING A MEMBER OF RESLINET MATERIAL HAVING TWO FIRST SIDEWALL PORTIONS AND TWO SECOND SIDEWALL PORTIONS, A CONDUIT AT LEAST PARTLY DEFINED ON OPPOSITE SIDES BY INTERIOR SURFACES OF THE LOWER PORTIONS OF SAID FIRST SIDEWALL PORTIONS AND AT LEAST PARTLY DEFINED BETWEEN SAID OPPOSITE SIDES BY INTERIOR SURFACES OF SAID SECOND SIDEWALL PORTIONS, A SLIT IN ONE END OF SAID MEMBER COMMUNICATING WITH SAID CONDUIT, SAID SLIT HAVING WALLS PROVIDED BY UPPER PORTIONS OF SAID FIRST SIDEWALL PORTIONS, SAID FIRST SIDEWALL PORTIONS HINGEABLE ABOUT A FULCRUM TO MOVE SAID UPPER PORTIONS APART AND TO BRING TOWARD EACH OTHER SAID LOWER PORTIONS THEREOF WITH CONCOMITANT FLEXING OF SAID SECOND SIDEWALL PORTIONS, SAID CONDUIT DISPOSED TO PROVIDE FOR COMMUNICATION BETWEEN SAID SLIT AND A CONTAINER AT THE OPPOSITE END OF SAID HEAD FROM SAID SLIT, SAID HEAD PARTICULARLY CHARACTERIZED BY SAID FIRST SIDEWALL PORTIONS BEING RELATIVELY RIGID AND SAID SECOND SIDEWALL PORTIONS BEING RELATIVELY FLEXIBLE AND RESILIENTLY DEFORMABLE AND BY SAID FULCRUM COINCIDING SUBSTANTIALLY WITH THE LOWER TERMINI OF SAID SLIT AND BY STRESSES IN SAID SIDEWALL PORTIONS WHICH TEND TO DEFORM SAID HEAD INTO A POSITION WHEREIN SAID UPPER PORTIONS WOULD BE PARTLY COEXTENSIVE IN SPACE, SAID STRESSES PROVIDING PRESSURE OF EACH OF SAID WALLS OF SAID SLIT AGAINST THE OTHER TO PROVIDE CLOSING OF SAID SLIT, SAID SLIT HAVING LOWER TERMINI WHICH ARE SUBSTANTIALLY ON A SINGLE LINE, SAID HEAD PARTICULARLY CHARACTERIZED BY SAID FULCRUM COINCIDING SUBSTANTIALLY WITH SAID LINE AND THEREFORE WITH THE LOWER TERMINI OF SAID SLIT.