Fastener driving device

Driving system for driving a triple-pronged fastener having first and second parallel sharp, pointed prongs joined together by a connecting portion into a first board surface of a first board and a second board surface of a second board, respectively, at a junction of said first and second boards, one said board overlying the other said board, the first and second surfaces making a first included angle of less than 180° between them, said fastener having a third sharp, pointed prong extending from said connecting portion in a different direction, said device comprising:

• alignment structure having first and second board abutment surfaces in respective planes at said first included angle, said planes intersecting at a line to be aligned with said junction in use;
• a fastener delivery channel,
• a plurality of triple-pronged fasteners positionable within said delivery channel, each said fastener having a first prong, a second prong parallel to the first prong, and a connecting portion that is perpendicular to said first and second prongs, said first and second prongs being generally aligned with said line, and said connecting portion being parallel to said line,
• said delivery channel ending at or near said line aligned with the junction of said first and second abutment surfaces so as to direct a first point of said first staple into said first board and a second point of said first staple into said second board, said delivery channel being fixed in position with respect to said alignment structure;
• a first driver for driving said first and second prongs from said channel through said line into said boards, said driver being slidably connected to said alignment structure;
• and
• a second driver positioned at a first angle with respect to said first driver so as to travel generally parallel to said first abutment surface and to bend said third prong to change its orientation with respect to said first prong.