Patent ID: 8016015

Claim:
A method of securing the position of a portal closure comprising a plurality of parallel panels supported by rollers that are confined to translation along track channels that are separated by a track web, said panels being secured to hollow axle tubes for articulation about a substantially horizontal axis and said track web having at least one transverse aperture, said method comprising the steps of: providing a substantially integral, U-shaped appliance having first and second, substantially parallel, arms linked by a bight section, said second arm being of greater length than said first arm and said first arm having a cross-sectional configuration for penetrating a hollow interior of said closure axle tube, a distal end portion of said second arm having a cross-sectional configuration for penetration of said track web aperture; and, simultaneously inserting said first arm of said U-shaped appliance into the hollow interior of said closure axle tube while inserting a distal end of said second arm through said track web aperture.