Patent ID: 7094300

Claim:
A method of making a drywall trim device for covering the edge of at least one drywall panel and adapted to be exposed to a high temperature and low humidity environment, including: selecting an elongated metal core to cover said edge and formed with an outwardly facing core surface; selecting an elongated moisture absorptive fiber cover strip wider than said core rolled into a roll; dehydrating said cover strip by heating the roll to a temperature above 100° F. for a predetermined time, preferably in a range between 125° F. to 160° F., in a low moisture environment sufficiently to shrink it by substantially 3% to assure a shrunken condition; feeding said shrunken cover strip from said roll and applying a bonding agent to said core; while in said shrunken condition, positioning said cover strip on said bonding agent with overhangs on opposite sides of said core including folding said overhangs over opposite edges of said core and bonding said overhangs to an underside of the core; feeding said core and cover strip between a pair of rollers while said bonding agent cures whereby said core and cover strip may thereafter be exposed to humidity causing said cover strip to expand relative to said core and thereafter may be exposed to said high temperature low humidity environment causing said cover strip to dehydrate and contract with separation from said core being resisted by said bond.