Seam folding machine

A jointing machine for manufacturing seamed metal sheets by folding seams in segmented metal sheets, said seam having a back side and a front side and said front side of said seam having a first part and a second part, said jointing machine comprising:

• support roller means, rotatable about an axis perpendicular to a first place and having an outer periphery and an upper surface, for supporting at least a portion of said first part of said front side of said seam on said upper surface parallel to said first plane, said upper surface being disposed adjacent said outer periphery;
• locking wheel means, rotatable about an axis perpendicular to a second plane and having an outer periphery, for applying pressure to at least a portion of said second part of said front side of said seam to fold said at least a portion of said second part of said front side of said seam onto said at least a portion of said first part of said front side of said seam;
• locking wheel carriage means, movable parallel to said second plane and disposed above said support roller means, for supporting said locking wheel means for rotation about said axis perpendicular to said second plane with said outer periphery of said locking wheel means proximate said outer periphery of said support roller means, said first plane and said second plane forming an acute angle therebetween;
• adjustment roller means, rotatable in a plane parallel to said first plane and having an outer periphery, for contacting the back side of said seam with said outer periphery and supporting said back side of said seam against movement in a direction parallel to said first plane, said outer periphery of said adjustment roller means being disposed proximate the outer peripheries of said support roller means and said locking wheel means.