Patent ID: 7014091

Claim:
A stapler apparatus comprising: a fixed frame; a movable frame pivotably mounted to the fixed frame; a staple driving device disposed on one of the fixed frame and the movable frame; a staple bending device to bend the leading ends of staples, the staple bending device disposed on the other of the fixed frame and the movable frame; a drive mechanism to reciprocally move the movable frame with respect to the fixed frame to clamp a stack of sheets between the fixed frame and the movable frame; a transmission member movably supported on the movable frame at a first mounting location, the transmission member being free to move about the first mounting location without restriction by the fixed frame at any point of the transmission member spaced from the first mounting location, and an urging member disposed to bias the transmission member with respect to the movable frame, the transmission member being coupled to the drive mechanism such that the drive mechanism engages and moves the transmission member with respect to the movable frame, thereby overcoming the bias of the urging member, to compensate for a stack height of the stack of sheets clamped between the fixed frame and the movable frame.