Patent ID: 7607334

Claim:
A bending head for bending the peripheral edge of a sheet of material, said bending head being usable with a power source, said bending head comprising: an anvil member, said anvil member defining a substantially elongated anvil surface; a hammer member movable relatively to said anvil member substantially perpendicularly to said anvil surface; and an actuator for receiving power from said power source, said actuator being operatively coupled to said hammer member for moving said hammer member in a reciprocating movement relatively to said anvil member when said power source powers said actuator; said hammer member defining a hammer surface, said hammer surface being substantially elongated, said hammer surface substantially opposing said anvil surface so as to define a gap therebetween, said gap defining an entry point and a substantially longitudinally opposed exit point, said sheet of material being movable along said gap between said entry and exit points, said entry and exit points defining respectively an entry transversal cross-sectional configuration and an exit transversal cross-sectional configuration, said entry and exit transversal cross-sectional configurations differing from each other, said gap having a transversal cross-sectional configuration that longitudinally transitions substantially smoothly between said entry and exit transversal cross-sectional configurations; said hammer member reciprocating between a proximal position and a distal position, said hammer member being closer to said anvil member in said proximal position than in said distal position, said actuator including a resilient member operatively coupled to said hammer member for allowing variations in a distance between said hammer and anvil surfaces when said hammer member is in said proximal position, whereby sheets of material having different thicknesses are insertable between said anvil and hammer surfaces.