Abstract: An apparatus is disclosed for reshaping a butt joint formed by a pair of adjacent butt edges of mounted wallboards. The apparatus has tapering means, which includes a body with a pair of beveled surfaces for contacting and simultaneously tapering the adjacent butt edges. The apparatus also has aligning means, which includes a ridge for aligning the tapering means with the butt joint. In one embodiment, the apparatus includes a handle and the tapering means is a rotatable wheel attached to one end of the handle and having the ridge and beveled surfaces on its circumferential edge. In another embodiment, the tapering means is a semicircular disk that is fixedly attached to one end of the handle and has an outer curved portion with the ridge and beveled surfaces thereon.

Abstract: The preparation of a pair of abutting straight edges of a pair of wallboard panels for receiving spackle to provide smooth planar butt joints includes the use of a rotary tool having a tool bit to form a channel extending on both sides of the butt joint after the wallboard panels have been installed. After the formation of the channel, spackling of the butt joint in a conventional manner results in a smooth planar finished surface.

Abstract: An apparatus for reshaping a butt joint, which is formed by a pair of adjacent butt edges of mounted wallboards. The apparatus has tapering means, which includes a body and a pair of beveled surfaces for contacting and simultaneously tapering the adjacent butt edges, and aligning means, which includes a ridge for aligning the tapering means with the butt joint. In one embodiment, the apparatus includes a handle and the tapering means is a rotatable wheel that is rotatably having the ridge and beveled surfaces on its circumferential edge and being attached to one end of the handle. In another embodiment, the tapering means is a semicircular disk having an outer curved portion with the ridge and beveled surfaces thereon and being non-rotatably attached to one end of the handle.