Embossing tool for forming groove in outer face and tapered portion on inner face ofwallboard

Claim 1

AN EMBOSSING TOOL FOR WALLBOARD COMPRISING: (A) A BODY U-SHAPED IN CROSS SECTION AND HAVING SPACED APART PARALLEL SIDES FOR RECEIVING WALLBOARD THEREBETWEEN; (B) A GROOVE-FORMING ROLLER ROTATABLY CARRIED BY ONE OF SAID SIDES AND BEING ROLLABLE OVER ONE SURFACE AND ADJACENT TO AN EDGE OF THE WALLBOARD WHEN THE BODY IS MOVED RELATIVE TO THE WALLBOARD FOR EMBOSSING A GROOVE IN THIS SURFACE THAT LIES ADJACENT TO THE EDGE; (C) A SHAFT CARRIED BY THE OTHER SIDE OF SAID BODY AND HAVING ITS AXIS PARALLELING THE AXIS OF SAID GROOVEFORMING ROLLER; (D) SAID SHAFT HAVING AN ECCENTRIC CYLINDRICAL PORTION; (E) A SLEEVE ROLLER ROTATABLY MOUNTED ON SAID ECCENTRIC PORTION; AND (F) AN ARM HAVING ONE END SECURED TO SAID SHAFT; SAID ARM BEING SWINGABLE FOR ROCKING SAID SHAFT AND ECCENTRIC PORTION FOR CAUSING THE LATTER TO MOVE SAID SLEEVE ROLLER TRANSVERSELY TOWARD THE WALLBOARD SURFACE LYING ADJACENT THERETO FOR MOVING THE WALLBOARD AGAINST SAID GROOVE-FORMING ROLLER AND CAUSING THE LATTER TO EMBOSS THE GROOVE IN THE WALLBOARD.