Patent ID: 6405726
Filing Date: 2002-06-18
Classification: A61M,G09B

Abstract:
A method of differential pressure forming a resuscitation mask of the type that may include a one-way valve and does include a thermoplastic flexible barrier sheet hermetically secured to a tubular member through which air is delivered from a rescuer's mouth to a victim's mouth and lungs, said method comprised of the following steps:(a) placing said tubular member in engagement with a porous plate such that a central axis of said tubular member is essentially perpendicular to said porous plate, (b) locating said thermoplastic flexible barrier sheet between said tubular member and a source of heat, (c) activating said source of heat to soften said thermoplastic flexible barrier sheet; (d) establishing a low pressure region on a side of said porous plate opposite to the porous plate side on which said tubular member has engaged said porous plate, said low pressure region thereby causing a differential pressure across said porous plate that results in said softened thermoplastic flexible barrier sheet being drawn towards said tubular member and taking on a new shape such that at least a portion of said tubular member becomes sandwiched between said softened flexible sheet and said porous plate, a portion of said softened thermoplastic flexible sheet being drawn across said tubular member; (e) cooling said softened thermoplastic flexible barrier sheet to thereby cause said flexible thermoplastic sheet to maintain its new shape; (f) creating an opening through said flexible sheet in a region where said surface is defined by the tubular member, and (g) inserting into said tubular member through said opening in said flexible thermoplastic sheet an insert means that mates with said flexible sheet to form a seal between said tubular member, said flexible thermoplastic sheet and said insert means.