Patent ID: 7455882

Claim:
A method of applying a liquid adhesive to a portion of the inside surface of a cathode casing for a zinc/air cell, said liquid adhesive comprising a thermoplastic polyamide resin, comprising: rotating said surface beneath an applicator having a pneumatically piston actuated needle valve therein for dispensing said adhesive, wherein said needle valve operatively engages the inlet end of a tubular dispense tip, wherein said tubular dispense tip is elongated and extends form and beyond said needle valve, so that when the valve is open said liquid adhesive passes form the applicator through said dispense tip onto said rotating surface; and applying said adhesive comprising a polyamide resin through said applicator onto a portion of said rotating surface, wherein the cathode casing is in the form of a can having an open end and a closed end and said liquid adhesive passes from said applicator to the inside surface of said closed end; wherein said inside surface of the closed end of the cathode casing is flat along an annular path spanning a revolution of the cathode casing and said liquid adhesive having a viscosity between about 150 and 250 centipoise passes form said applicator through said dispense tip to the inside surface of said closed end of the cathode casing thereby covering said flat annular path with at least one continuous ring of adhesive; wherein said inside surface rotates at a speed of between about 100 and 600 revolutions per minute relative to said applicator; wherein said valve opening time is between about 0.1 and 0.6 seconds to dispense said adhesive onto said rotating surface; where in said liquid adhesive from said tubular dispense tip coats said inside surface of the closed end of said cathode casing in an annular coating width between about 10 and 25 mil (0.245 and 0.635 mm); and applying a porting of an electrolyte barrier sheet of polytetrafluoroethylene to the adhesive on the inside surface of said flat annular path thereby bonding said electrolyte barrier sheet to the inside surface of the closed end of the cathode casing.