Abstract: The present invention provides a staple including a base, a hollow frame pivotably mounted on the base and having a forward closed end and a rearward opened end, a handle pivotably mounted on the frame and a feeder mounted in the hollow portion of the frame, the feeder including a cap mounted on the rearward opened end of the frame, a rod extending inwardly from the inner face of the cap, a feeder element slidably mounted on the inner end of the rod and adapted to engage the rearmost one of staples housed in the hollow portion of the frame and a coil spring mounted about the rod and resiliently acting between the feeder element and the inner face of the cap to urge the staples toward the forward closed end of the frame.

Abstract: The present invention provides a stapler including a base, a frame pivotally mounted on the base as its rearward end, a handle pivotally mounted on the frame at its rearward end, at least the handle being made of a plastic material, the base including a recess formed on its surface facing the frame at the forward end, and a metallic anvil element being pressed into the recess on the base, the anvil element having at least one pointed projection extending outwardly from the side wall of the anvil element, the pointed projection biting into the material of the base at the corresponding side wall of the recess to hold the anvil element within the recess.

Abstract: The present invention provides a stapler comprising a base formed with an anvil at its forward end, a frame containing a set of staples and forwardly biasing the set of staples to position the forwardmost one of the staples at a location coincident with a staple driving aperture formed in the frame at its forward end, and a handle pivotally mounted on the frame on the opposite side to the base, the handle including an actuating member formed thereon at its forward end and which extends downwardly from the handle, the actuating member adapted to move through the staple driving aperture in the frame and to drive the forwardmost staple from the frame toward the anvil on the base when the handle is pivoted toward the frame, at least the handle being injection molded integrally with the actuating member from a plastic material, the actuating member including a body having a plate-shaped cross-section and thick-walled reinforcing portion extending along the length of the body of the actuating member.

Abstract: The present invention provides a stapler including a base section having an anvil at its forward end, a frame section containing a set of staples and forwardly biasing the set of staples toward a through-opening on the forward end of the frame section, a handle section pivotally mounted on the frame section on the side opposite to the base section, the forward end of the handle section including an actuating member adapted to penetrate the through-opening in the frame section and to drive the forwardmost one of the staples in the frame section toward the anvil on the base section, at least the handle section being injection-molded with the actuating member, the actuating member having a thick-walled reinforcing portion extending along the length of the actuating member.

Abstract: The present invention provides a staple cassette including a relatively elongated body having a hollow portion extending throughout the length of the body and having a pair of staple driving apertures formed in the body adjacent to its forward end and aligned with each other and feeder means in the hollow portion for resiliently urging a set of staples in the hollow portion toward the forward end thereof, the feeder means including a feeder element engaging the rearward end of the staple set housed in the hollow body portion, a coil spring mounted in the hollow body portion to engage the rearward end of the feeder element and a cap mounted on the cassette body to close its rearward opened end and engaging the opposite end of the coil spring, the cap including a pair of projections adapted to snap-fit into the respective openings on the sidewalls of the cassette body when the cap is pressed into the rearward opened end of the cassette body.

Abstract: The present invention provides an improved and new stapler including a base with an anvil at the forward end thereof, a hollow frame for containing a set of staples and a handle having an integral staple driver formed therein, all of which are molded from a synthetic resin material, said hollow frame including a primary fulcrum element extending downwardly from the underside of said hollow frame at the intermediate point between the opposite ends thereof and an auxiliary fulcrum element extending upwardly from the top face of said hollow frame adjacent to the rearward end thereof, said base including a recess formed therein for receiving the primary fulcrum element of said frame, and said handle including another recess formed therein for receiving the auxiliary fulcrum element on said frame.

Abstract: The present invention relates to a construction of a stapler having a base, a staple magazine hinged to the base, a magazine follower arranged in the staple magazine, and a guide body positioned over the staple magazine and hinged to the base. The stapler is characterized by two novel elements. At least one first punched-out element extends between the guide body and a top surface of the staple magazine in order to absorb elastic stress created between the guide body and the staple magazine when the stapler is operated. At least one second punched-out element extends between the base and a bottom surface of the staple magazine in order to absorb elastic stress created between the base and the staple magazine when the stapler is operated.