Drywall trimming element with compound locking feature

A flexible drywall trimming element for bridging two sections of drywall, comprising:

• first and second flanges spanning a curved center portion, at least one of the flanges having a surface for facing relation to the drywall section and adapted to be secured to the section of drywall by application of a joint compound between the at least one flange and the section of drywall, the surface in facing relation to the drywall section having a plurality of compound locking members formed longitudinally along the surface extending from the flange in a direction transverse and non-normal to a plane of the flange, each of the compound locking members formed at an angle relative to the surface about equal to the other locking members, and at an angle greater than or less than 90 degrees, wherein when joint compound is disposed between the surface and the drywall, the joint compound fills the a space void between the locking member and the surface and hardens to secure the drywall trimming element to the wall, and wherein the central region is devoid of ribs.

A flexible drywall trimming element for application to drywall, configured for securing to the drywall by joint compound, comprising:

• a pair of flanges, each having an interior surface adapted to be positioned on or adjacent to the drywall, the flanges connected by a central region, the interior surface of each flange defining a surface plane, the interior surfaces having a plurality of upstanding longitudinally oriented ribs extending outwardly from their respective surfaces, the ribs extending away from the surfaces to define a void space between the respective surfaces adjacent to the ribs and an end of the ribs, such that a line extending outwardly from and normal to the respective surfaces of the flange adjacent to the ribs traverses through the void space and then subsequently contacts the ribs, each of the ribs formed at an angle relative to the respective surfaces about equal to the other ribs, wherein when joint compound is disposed between the interior surface of the mounted flange and the drywall, the joint compound fills the void space and hardens to secure the drywall trimming element to the wall, and wherein an exterior surface of the flange is formed without ribs, and wherein the central region is formed without ribs.