Patent ID: 7703650

Claim:
A staple container for an electric stapler comprising: a case for accommodating stacked staple sheets each comprising linear staples connected in parallel; a staple pushing plate engaged in the case and vertically movable; a nonreturn lug provided at an edge of the staple pushing plate; and a plurality of nonreturn projections formed on an inner wall of the case and engaged with the nonreturn lug, wherein the inner wall of the case includes an upper half and a lower half, the nonreturn projections formed on the lower half of the inner wall project laterally inward from the inner wall by a first height, the nonreturn projections formed on the upper half of the inner wall project laterally inward from the inner wall by a second height, and the second height is greater than the first height, and wherein a force that descends the staple pushing plate along the nonreturn projections is lower at the lower half of the inner wall than at the upper half of the inner wall.