Convertible bed for overedge sewing machine

An overedge sewing machine comprising a frame, said frame including a bed (12) having a work supporting surface (13), said work supporting surface (13) supported in part by a vertical side wall (32) and an adjacent vertical front wall (42), said bed (12) further including an extension (33) to said vertical side wall (32) and a portion (26) projecting laterally from said extension (33) beyond said sewing machine on the opposite side of said extension (33) from said vertical front wall (42), said projecting portion (26) forming with said extension (33) an upper surface (27) coplanar with said work supporting surface (13) of said bed, said upper surface (26) having slots (51) therethrough in the direction of said vertical side wall (32), said projecting portion (26) having a cross section for accommodation in a cylinder of work material, said frame supporting sewing instrumentalities including a sewing needle (23) movable into an opening (35) in said extension (33) for cooperation with other of said sewing intrumentalities in the formation of stitches, said bed supporting a work feeding system for feeding a work material in a line of feed relatively to said sewing instrumentalities and substantially parallel to said vertical side wall (32), said feeding system including a feed bar (46) supported in said bed and having an end (47) thereof jutting from said bed to said opening (35) in said extension (33) to said vertical side wall (32), a feed dog (20) supported on the end of said feed bar (46), said feed dog (20) extending into said slots (51) in said upper surface (27), a first and second groove (36, 40) in said vertical side wall (32) and in said extension (33) about said laterally projecting portion, said first groove (36) extending through said vertical side wall (32) behind said sewing needle (23), a bridge (44) extending from said vertical side wall (32) around said first groove (36) to said extension (33) of said vertical side wall (32), said bridge (44) forming one wall of said first groove (36), a pivot pin (30) extending from said vertical side wall (32) of said bed adjacent the work supporting surface (13) thereof, a work support plate (28) with a top surface (54) having an edge adjacent said vertical side wall (32), said top surface (54) including a finger (29) adapted to fit into said first groove (36) behind said sewing needle (23), said work support plate (28) pivotable on said pivot pin (30) from a first position with said top surface (54) coplanar with said work supporting surface (13) of said bed (12) and said upper surface (27) of said projecting portion (26) to a second position with said top surface (54) and said finger (29) separated from said upper surface (27) and with said grooves (36, 40) about said laterally projecting portion (26) exposed to accommodate an edge of a cylinder of work material.