Tapering device for removing portions of a gypsum board

Metal working – Method of mechanical manufacture – Shaping one-piece blank by removing material

Reexamination Certificate

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Details

C409S132000, C409S178000, C409S137000

Reexamination Certificate

active

11406658

ABSTRACT:
A device10and method for forming a non-tapered end12of a gypsum board14into a tapered configuration or portion16includes a rotary drive tool18that imparts rotary motion to a tool bit20removably secured thereto, a pair of oppositely disposed angle members22having cooperating base portions24configured to promote attaching a dust collection collar17to the base portions24, the angle members22disposing and guiding the rotating tool bit20between outer paper walls28of a non-tapered end12of the gypsum board14to ultimately severe portions of gypsum from the non-tapered end12thereby forming a recess32without damaging the outer paper walls28of the gypsum board14. The device10and method ultimately removes severed portions of gypsum from the recess32, whereupon, the non-tapered end12of the gypsum board14is forcibly bent to form a tapered configuration, end edges128of the board14are secured together with tape122to prevent the board14from returning to a non-tapered configuration, and the gypsum board14is secured to a support structure38such that tapered portions16of adjacent gypsum boards14cooperate to promote a planar finished seam when tape and joint compound are applied thereto.

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