Patent ID: 7632556

Claim:
A self-adhesive weld zone purge dam for retaining purge gas around a weld zone, comprising: a base configured to substantially obstruct an air passage leading to said weld zone; an adhesive skirt configured to engage portions of said air passage; adhesive on said adhesive skirt for adhering said skirt to said air passage; a removable backing covering said adhesive; and said skirt being deployable from a stowed position wherein said adhesive is generally disposed in an interior portion of said purge dam to an installation position wherein said adhesive can be pressed against a surface to which said purge dam is to be adhered; whereby said purge dam can be installed by inserting it in said air passage with said skirt in said stowed position, removing said removable backing prior to or after said insertion to expose said adhesive, and deploying said skirt to said installation position for adhesion.