Disposable package for liquids

Claim 1

A package for shipping, storing and controlled dispensing of a unit or single use quantity of liquid comprising: a pair of flexible, liquid-impermeable sheets superposed one over the other, each of said sheets having a longitudinal axis and comprising a first substantially rectangular section of a first predetermined width, a second substantially rectangular section of a second predetermined width, said second predetermined width being less than said first predetermined width, and a transition section intermediate said first and second sections having a width tapering from said first predetermined width adjacent said first section to said second predetermined width adjacent said second section, one of said sheets having a recess, co-axial with its longitudinal axis, pre-formed therein defining a pocket substantially disposed within said first section and said transition section of said sheet, said pocket having a volume only slightly larger than the volume of said unit or single use quantity of liquid, the other of said pair of sheets defining a cover extending across and covering said recess enabling compression of said pocket and pressurization of said liquid by squeezing thereof between a user's thumb and forefinger without contaminating said liquid, said sheets being of sufficient resilience and flexibility to enable expansion of said pocket and cessation of pressurization of said liquid upon release of such user compression thereof, said recess further comprising a portion defining an elongated and narrow spout portion co-axial with said sheet longitudinal axis, extending generally outwardly of said pocket from said transition section into said second section; sealing means for hermetically sealing said sheets together peripherally completely around said pocket and spout portion to protect said liquid from contamination and being manually peelable in the region of said spout to enable manual peeling back of the second portions of said sheets in the region of said spout to a controlled extent less than the length of said spout portion to provide a restricted opening near an end of said spout portion and an aseptic annular rim defined by a portion of said peeled sheets so that during expression of pressurized liquid through said restricted opening said liquid only touches material theretofore previously sealed to retain said liquid sterile as it is expressed outwardly through said spout portion and said restricted opening, said sealing means having a stop line which defines a generally straight line edge substantially perpendicularly disposed to said longitudinal axes across said second sections in the region of said spout, said stop line peripherally permanently affixing said sheets one to the other; means defining an arcuately shouldered notch centered at each end of said stop line in each of said pair of sheets so that when the ends of said second sections are peeled back to said stop line, and folded back upon respective transition sections, the portions of said sheets proximate said aseptic annular rim arcuately taper backwardly from said aseptic annular rim.