Abstract: A strip of drywall tape is simultaneously coated on its opposite front and rear surfaces as the tape is applied to a corner joint formed between a pair of abutting wall boards such as drywall panels. A tape guide provided on a drywall taping head guides a folded strip of drywall tape over a first reservoir of flowing drywall compound. The compound flows through the first reservoir and against the V-shaped front surface of the tape. The compound continues to flow over and around the front surface and over the rear surface of the tape and laterally into a pair of secondary reservoirs.