| US 7,614,537 B2 | ||
| Stapler with a movable anvil device | ||
| Mats Andersson, Mullsjö (Sweden); Mattias Palmquist, Hestra (Sweden); Trygve Gustavson, Åsenhöga (Sweden); and Per-Åke Högberg, Åsenhöga (Sweden) | ||
| Assigned to Isaberg Rapid AB, Hestra (Sweden) | ||
| Appl. No. 11/596,541 PCT Filed May 06, 2005, PCT No. PCT/SE2005/000658 § 371(c)(1), (2), (4) Date Nov. 22, 2006, PCT Pub. No. WO2005/115699, PCT Pub. Date Dec. 08, 2005. |
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| Claims priority of application No. 0401340 (SE), filed on May 25, 2004. | ||
| Prior Publication US 2007/0125825 A1, Jun. 07, 2007 | ||
| Int. Cl. B25C 5/02 (2006.01) | ||
| U.S. Cl. 227—120 [227/131; 227/132; 227/155; 227/156; 227/144; 227/134] | 20 Claims |
| 1. A stapler for stapling a workpiece, the stapler comprising:
a stapling unit and a base part which are connected so as to be movable toward and away from each other in a reciprocating
stapling movement,
wherein the stapling unit includes a driver and is adapted to contain staples, and the base part includes a lower part and
an upper part having a contact surface with a staple opening therein, the workpiece to be placed against the contact surface
during the stapling,
wherein the upper part is connected to the lower part such that the upper part is movable, from an initial position, toward
the lower part during the stapling movement,
wherein a latching arrangement is provided between the lower part and the upper part to prevent the upper part from being
moved toward the lower part,
wherein an anvil device is arranged on the base part,
wherein the stapling unit and the base part are arranged such that stapling is performed by moving the stapling unit relative
to the base part and into contact with the workpiece, whereupon the driver drives a staple into the workpiece to a position
in which a crown of the staple is in contact with the workpiece and legs of the staple extend through the staple opening,
whereupon a releasing device arranged in the stapler releases the latching arrangement and the upper part and stapling unit
are moved toward the lower part, whereby the staple legs are bent by the anvil device into contact with an underside of the
workpiece, and
wherein the anvil device is elastically supported on the base part by way of an elastic element in an area between the lower
part and the upper part, the anvil device being urged by the elastic element toward the staple opening such that the anvil
device blocks said staple opening when the upper part is in the initial position and such that the anvil device is displaced
from the staple opening by the legs of the staple during at least a portion of the stapling movement.
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