Patent ID: 6616029
Filing Date: 2003-09-09
Classification: B27F

Abstract:
A stapler for driving staples into objects (33; 33â€²), such as sheaves of papers, said stapler comprising an anvil element (16; 16â€²), which has a means (18, 18â€²) for clinching driven-in staples, and a stapling element (1; 1â€²), which cooperates with the anvil element and which contains staples, one of the anvil element (16; 16â€²) and the stapling element (1; 1â€²) being fixedly arranged in the stapler, and these elements being movable relative to each other between a starting position and a working position, in which they are applied against an object (33; 33â€²), when this is placed in the stapler between the anvil element (16; 16â€²) and the stapling element (1; 1â€²) to be stapled, and said stapler further comprising a driver (8; 8â€²), which is reciprocatingly arranged on the stapling element (1; 1â€²) and which is arranged to drive a staple into the object in the direction of the anvil element (16; 16â€²), and an operating element (10; 10â€²), which is arranged to reciprocate the driver (8; 8â€²) and which, for this purpose, is movable relative to the stapling element (1; 1â€²); the anvil element (16; 16â€²) and the operating element (10; 10â€²) being movable back and forth relative to the stapling element (1; 1â€²) in one and the same path of motion, and the anvil element (16; 16â€²) and the operating element (10; 10â€²) being movable relative to each other in said path of motion with the aid of a reversible driving means (19, 23, 26, 27, 29, 30, 32; 19â€², 23â€², 26â€², 27â€², 29â€², 30â€², 32â€²),characterised in that the operating element (10; 10â€²) is movably connected to the stapling element (1; 1â€²) and the anvil element (16; 16â€²) in such a manner that its inertia against movement relative to the stapling element (1; 1â€²) is greater than its inertia against movement relative to the anvil element (16; 16â€²), which means that, when the driving means (19, 23, 26, 27, 29, 30, 32; 19â€², 23â€², 26â€², 27â€², 29â€², 30â€², 32â€²) is driven in one direction, the anvil element (16; 16â€²) and the stapling element (1; 1â€²) are first moved relative to each other from the starting position to the working position and the operating element (10; 10â€²) is subsequently moved relative to the stapling element (1; 1â€²) to move the driver (8; 8â€²) in its drive-in direction, and that, when the driving means after reversal is driven in the other direction, the anvil element (16; 16â€²) and the stapling element (1; 1â€²) are first moved relative to each other from the working position to the starting position and the operating element (10; 10â€²) is subsequently moved relative to the stapling element (1; 1â€²) in order to move the driver (8; 8â€²) in the direction opposite to the drive-in direction, and that the driving means (19, 23, 26, 27, 29, 30, 32; 19â€², 23â€², 26â€², 27â€², 29â€², 30â€², 32â€²) is adapted to be reversed, on the one hand, when the operating element (10; 10â€²), when driving the driving means in said one direction, reaches a first position, in which it cannot move the driver (8; 8â€²) any further in its drive-in direction and, on the other hand, when the operating element (10; 10â€²), when driving the driving means in said other direction, reaches a second position, in which it cannot move the driver (8; 8â€²) any further in the direction opposite to the drive-in direction.