Abstract: A stapler clincher mechanism which bends two leg portions of a staple struck and penetrated through papers by a staple driving unit, includes: two first clinchers respectively disposed downwardly of the two leg portions of the staple and respectively including guide inclined surfaces which guides the two leg portions in such a manner that the two leg portions are curved inwardly; a second clincher interposed between the two first clinchers and including a projection portion which presses leading ends of the two curved leg portions toward a paper surface of the papers; and a drive mechanism, after the two leg portions of the staple are curved by the guide inclined surfaces, which retreats the first clinchers along the paper surface and moves the second clincher toward the paper surface.

Abstract: A refill case is provided with: an accommodating part (2) for accommodating staple-sheets (1); a staple pressing member (4) for pressing a top of the staple-sheets (1); locking saw-toothed portions (6a, 6b) having saw-toothed shapes; and return-preventing claws (5) formed ends of the staple pressing member (4) and engaged with the locking saw-toothed portions. A phase of the saw-toothed shape of the right locking saw-toothed portion is shifted from a phase of the saw-toothed shape of the left locking saw-toothed portion.

Abstract: An electric stapler is provided with: a driver unit including a driver for striking out a staple to be penetrated through sheets of paper; and a clincher unit including a clincher for bending leg portions of the staple penetrated through the sheets of paper. The driver unit is provided with: a staple storage portion for storing therein a large number of connected staples; a head portion for striking out the staple; a drive portion configured to drive said driver provided slidably in the head portion; and a head raise/lower mechanism configured to relatively move the head portion with respect to the staple storage portion toward the clincher unit to thereby clamp the sheets of paper.

Abstract: A stapler is provided with: a forming plate (2) configured to form a straight staple (S) into U-shape; a pusher (11) configured to push the formed U-shape staple (S1) in a first direction (Df) toward a driving portion (15); a driver plate (1) configured to drive the staple (S1) within the driving portion (15) toward sheets of paper (P); an engaging portion (27) formed on the forming plate (2); and a receiving portion (20) formed on the pusher (11). The engage portion (27) is configured to engage with the receiving portion (20), during a driving operation of the driver plate (1), so as to prevent the pusher (11) from moving in a second direction (Dr) which is opposite to the first direction (Df).

Abstract: A sheet processing apparatus equipped with a saddle stitch stapler is provided with: a driver unit (1) configured to drive a staple; a clincher unit (2) configured to clinch the staple driven by the driver unit (1); a saddle portion (3) integrated with the clincher unit (2); and a guide portion (6) configured to guide the clincher unit (2) toward a predetermined position of the driver unit (1), when a center portion (11) of a bundle of sheets (10) is clamped between the clincher unit (2) and a staple striking portion (21) of the driver unit (1) after the center portion (11) of the bundle of sheets (10) is placed on the saddle portion (3).

Abstract: A stapler clincher mechanism which bends two leg portions of a staple struck and penetrated through papers by a staple driving unit, includes: two first clinchers respectively disposed downwardly of the two leg portions of the staple and respectively including guide inclined surfaces which guides the two leg portions in such a manner that the two leg portions are curved inwardly; a second clincher interposed between the two first clinchers and including a projection portion which presses leading ends of the two curved leg portions toward a paper surface of the papers; and a drive mechanism, after the two leg portions of the staple are curved by the guide inclined surfaces, which retreats the first clinchers along the paper surface and moves the second clincher toward the paper surface.

Abstract: A clincher mechanism 7 is provided with a clincher member 10 having an inductive guiding face 11 for bending and guiding staple legs; a sheet-shape piece 12 arranged between the inductive guiding face and sheets; and operating pieces 18 for advancing/retracting the sheet-shape piece 12 onto the inductive guiding face of the clincher member 10. The staple legs penetrated the sheets are guided along the lower surface of the sheet-shape piece 12, and the sheet-shape piece 12 is operated by the action of operating pieces 18 so that it is extracted from between the staple legs. A paper pan 26 for guiding the sheets is arranged swingably above the clincher mechanism 7. The operating pieces 18 are operated through the paper pan 26 which is swung by the action of the staple driving portion 2.

Abstract: Clincher holders hold a pair of clinchers for bending the legs of a staple driven by a driver, and have slanting guide faces for guiding the tips of the legs of the staple toward the clinchers. In a stapling table for receiving sheets of paper, an opening is made. The clincher holders are movable inside the opening. Drop-preventing portions for preventing the sheets of paper from dropping inside the opening in stapling are projected from opening edges of the opening toward the inside of the opening.

Abstract: A clincher device is provided with a thin plate piece disposed between a guide surface of a clincher member for bending and guiding legs of a staple and a rear surface of sheets of paper. The legs of the staple penetrating through the sheets of paper are guided and bent along a lower surface of the thin plate piece. The clincher device is further provided with an operation piece protruded upward from the clincher device. The operation piece is operated via the sheets of paper by a staple driving portion which is operated to approach toward and separate from the clincher device. The operation piece moves the thin plate piece relative to the staple after a completion of a binding operation of the sheets of paper so that the thin plate piece sandwiched by the legs of the staple is pulled out from the legs of the staple.

Abstract: A clincher mechanism 7 is provided with a clincher member 10 having an inductive guiding face 11 for bending and guiding staple legs; a sheet-shape piece 12 arranged between the inductive guiding face and sheets; and operating pieces 18 for advancing/retracting the sheet-shape piece 12 onto the inductive guiding face of the clincher member 10. The staple legs penetrated the sheets are guided along the lower surface of the sheet-shape piece 12, and the sheet-shape piece 12 is operated by the action of operating pieces 18 so that it is extracted from between the staple legs. A paper pan 26 for guiding the sheets is arranged swingably above the clincher mechanism 7. The operating pieces 18 are operated through the paper pan 26 which is swung by the action of the staple driving portion 2.

Abstract: A clincher device is provided with a thin plate piece disposed between a guide surface of a clincher member for bending and guiding legs of a staple and a rear surface of sheets of paper. The legs of the staple penetrating through the sheets of paper are guided and bent along a lower surface of the thin plate piece. The clincher device is further provided with an operation piece protruded upward from the clincher device. The operation piece is operated via the sheets of paper by a staple driving portion which is operated to approach toward and separate from the clincher device. The operation piece moves the thin plate piece relative to the staple after a completion of a binding operation of the sheets of paper so that the thin plate piece sandwiched by the legs of the staple is pulled out from the legs of the staple.

Abstract: Clincher holders hold a pair of clinchers for bending the legs of a staple driven by a driver, and have slanting guide faces for guiding the tips of the legs of the staple toward the clinchers. In a stapling table for receiving sheets of paper, an opening is made. The clincher holders are movable inside the opening. Drop-preventing portions for preventing the sheets of paper from dropping inside the opening in stapling are projected from opening edges of the opening toward the inside of the opening.

Abstract: A guide piece 19 that enters between both legs 2b of a staple 2 is formed integrally on a pusher 16 that pushes a staple 2 as formed into a striking passage 12, an inclined surface 20 that engages with a staple 2 to operatively retreat the pusher is formed on the guide piece 19 to be positioned thereon so as not to engage with the staple 2 until tip ends of staple legs 2b penetrate through sheets, and a driver plate 7 and a forming plate 6 are set to operate out of phase relative to each other so that the forming plate 6 begins forming of a non-formed staple 2a after staple legs 2b struck out have penetrated through the sheets.

Abstract: A guide piece 19 that enters between both legs 2b of a staple 2 is formed integrally on a pusher 16 that pushes a staple 2 as formed into a striking passage 12, an inclined surface 20 that engages with a staple 2 to operatively retreat the pusher is formed on the guide piece 19 to be positioned thereon so as not to engage with the staple 2 until tip ends of staple legs 2b penetrate through sheets, and a driver plate 7 and a forming plate 6 are set to operate out of phase relative to each other so that the forming plate 6 begins forming of a non-formed staple 2a after staple legs 2b struck out have penetrated through the sheets.

Abstract: Outer shape dimensions of a staple cartridge for binding 100 sheets and a staple cartridge for binding 50 sheets are made the same. Staple detecting holes are provided at bottom faces of both of them, and a cartridge identifying hole for identifying a type of a cartridge is formed at one of them. A cartridge identifying sensor and a staple detecting sensor are provided at the inside of an electric stapler. Charge of the staple cartridge, determination of a cartridge type and presence or absence of a staple at the inside of the staple cartridge are detected by signals of the sensors.

Abstract: Outer shape dimensions of a staple cartridge for binding 100 sheets and a staple cartridge for binding 50 sheets are made the same. Staple detecting holes are provided at bottom faces of both of them, and a cartridge identifying hole for identifying a type of a cartridge is formed at one of them. A cartridge identifying sensor and a staple detecting sensor are provided at the inside of an electric stapler. Charge of the staple cartridge, determination of a cartridge type and presence or absence of a staple at the inside of the staple cartridge are detected by signals of the sensors.