| 主权项 |
1. A flat-clinch-stapler comprising:
a base portion having at a first rear end upstanding hearing pieces on both sides of a longitudinal horizontal plane of the stapler for supporting a first transverse pivot axis, and a floating clincher table for bending the legs of a staple at a second front end opposite to said first end, said clincher table being moveable between an upper paper supporting position and a lower staple bending position, and arresting means for arresting the floating clincher table in the upper position; an elongated magazine having an U-shaped cross section comprising a bottom wall and side walls extending upwardly therefrom, said magazine comprising staple guide means for receiving and guiding a plurality of staples, said magazine being pivotably mounted at its rear end about said first pivot axis and having a front end extending to a position above said clincher table; a driver arm carrying a driver blade at its front end for driving the most forward staple in said magazine into a paper stack introduced between the base portion and the magazine, said driver arm being pivotably mounted at its rear end to said first pivot axis; a handle member adapted to act against the driver arm and pivotably mounted about a second transverse axis disposed in the bearing pieces, said second axis being offset relative to said first pivot axis in a direction from the first end to the second end of the base portion, said handle member being adapted to act on the driver arm at a position even further to the front end of the stapler; said bottom wall of said magazine forming part of the guide means for guiding a plurality of staples and is adapted to guide the free ends of the legs of the staples within the magazine; an elongated intermediate member being disposed between said magazine and said driver arm and being pivotably mounted at a first end to said first pivot axis within the driver arm, resilient biasing means being disposed between said driver arm and said intermediate member; said intermediate member having an inverted U-shaped cross section comprising a top wall and side walls extending downwardly therefrom, said walls of said intermediate member extending in between and along said side walls of said magazine, the bottom edges of said side walls of said intermediate member being adapted to engage the cross member of said staples within said magazine; a release lever operative to release the arresting means of said floating clincher table is being pivotably mounted to said driver arm about a horizontal axis extending perpendicular to a longitudinal axis of said driver arm, said release lever having downwardly extending release arms acting on said arresting means and a flat cross member connecting said release arms and extending between a bottom surface of said driver arm and a top surface of said intermediate member; said cross member comprising downwardly directed extensions cooperating with the side walls of the magazine; wherein the side walls of the front end of the intermediate member are provided with respective longitudinal slots adapted to receive end portions of a roller, said roller having a length such that its free ends extend beyond the outside of the side walls of the intermediate member and into V-shaped slots in the side walls of the magazine, said V-shaped slots extending downwardly from the top edges of the side walls of the magazine, biasing means being provided for biasing the roller against one of the side edges of the V-shaped slots such that the roller rides upwardly along said side edges to space the lower edges of the side walls of the intermediate member from the cross members of the staples within the magazine. |
