Implements or apparatus for applying pushing or pulling force – Staple puller
Reexamination Certificate
2003-09-05
2004-08-10
Wilson, Lee (Department: 3723)
Implements or apparatus for applying pushing or pulling force
Staple puller
Reexamination Certificate
active
06772996
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to staple removers that have an added device for complete removal of a staple from an object or paper and more particularly, to an improved staple remover which has two ends, a first that is a standard staple remover and a second end that acts as a pair of pliers to grip and extract a partially removed staple.
2. Description of the Prior Art
The disadvantage of the conventional staple remover is that, frequently, one leg of the staple is dislodged, while the other leg remains embedded in the object or paper. When this occurs, the usual procedure employed is to grasp the staple with the fingers and to pull it free from the object. Finger punctures, torn fingernails, and torn paper are often the result of this effort. Prior art patents do not adequately address this problem in an efficient and effective way.
U.S. Pat. No. 5,090,662, issued Feb. 25, 1992 to Koo, describes a staple remover that has nippers formed on a side of its pivot opposite the staple removing jaws for gripping a staple bar. The nippers are formed by crossbars that connect to the opposite flanges of the body members, which form the staple remover.
U.S. Pat. No. 5,292,106, issued Mar. 8, 1994 to Li, concerns a staple remover wherein a pair of pointed teeth engage with a second pair of teeth to remove a staple, which has an improvement of a pair of clamping plates at the opposite end thereof.
U.S. Pat. No. 4,784,370, issued Nov. 15, 1988 to Strickland, discloses a staple removing device and associated method employing unique clamping devices for the removal of a staple that is broken or partially inserted in an object. The clamping devices are provided to engage the whole or parts of a partially removed staple thereby allowing the staple to be pulled from the object in accordance with the associated method.
U.S. Pat. No. 4,776,567, issued Oct. 11, 1988 to Strickland, illustrates a staple removing device and associated method employing unique clamping devices for the removal of a staple that is broken or partially inserted in an object. The clamping devices are provided to engage the whole or parts of a partially removed staple thereby allowing the staple to be pulled from the object in accordance with the associated method.
U.S. Pat. No. 2,033,050, issued Mar. 3, 1936 to Pankonin, shows a tool for removing staples or similar fasteners from paper. The tool has a pair of opposing jaws with at least one that has a camming action. The tool has handles that are on the opposite end from the jaws, which when squeezed together cause the to jaws to move towards each other thereby gripping the staple. The jaws have wedging elements for prying a staple away from a stapled article.
U.S. Pat. No. 5,875,503, issued Mar. 2, 1999 to Cheldin, provides a staple remover with first and second jaws pivotally connected for rotation about a single axis, which has wedging elements for prying a staple away from a stapled article. The remover may include gripping elements for grasping a partially disengaged or sheared staple. A letter opening is provided on one of the jaws for insertion into an envelope and slitting the same for opening the envelope.
U.S. Pat. No. 4,921,216, issued May 1, 1990 to Krulich, shows a staple remover for removing staples from stapled materials, which utilizes an inclined plane in combination with a gripper. First and second jaws are provided, each have two jaw members. The two jaw members of the first jaw are spaced from each other just less than the width of a staple. The two jaw members of the second jaw are spaced from each other less than the spacing of the jaw members for the first jaw so that the second jaw may insert within the first jaw. The first and second jaws are connected together by a pivot and are resiliently biased in an open position. Each of the jaw members of the first and second jaws terminate in a pointed extremity. Each of the jaw members of the first and second jaws further have an upper and lower cam surface which smoothly diverge from each other rearwardly from the pointed extremity. The combination of the upper and lower cams of each jaw member form two parallel wedge shapes which are used as dual inclined planes to cause a staple to be separated from materials to which it is stapled. The jaw members of one of the jaws are each provided with a notch spaced from the aforesaid pointed extremity thereof. A staple is removed by squeezing the jaws together thereby forcing the pointed extremities to move under the staple, the inclined plane action of the upper and lower cams causing the staple to be partially released from the material to which it is stapled. Thereupon, the staple will encounter the aforesaid notches, causing the staple to be gripped by action of the cam surface of the non-notched jaw members of the other jaw, and allowing for final staple removal by pulling.
U.S. Pat. No. 5,284,322, issued Feb. 8, 1994 to Clark, claims a staple puller with cam surfaces for pulling a staple from an object that has gripping surfaces at the upper ends of the cam surfaces to allow the staple being pulled to be securely gripped after the pulling action of the cam surfaces has ceased. A release slot is provided adjacent the gripping surfaces to receive a previously pulled staple such that it does not interfere with the pulling or gripping of a staple being pulled.
U.S. Pat. No. 6,145,811, issued Nov. 14, 2000 to Cheldin, puts forth an apparatus for removing staples that includes first and second jaws pivotally connected at their first ends, and first and second wedging elements connected to second ends of the jaws. First and second platforms are attached to the respective first and second jaws. Each platform has a planar pressing surface and a planar pressing stub extending laterally from opposing sides of the platform, such that the planar surfaces and the stubs of the first and second platforms generally face one another. The jaws include notches formed on an inner edges thereof for the grasping of staples. The apparatus further includes first and second gripping elements attached to and extending laterally from the first and second jaws so as to face one another for the removal of difficult-to-remove staples.
U.S. Pat. No. 5,354,033, issued Oct. 11, 1994 to Cheldin, indicates a staple remover with first and second jaws, which are pivotally connected for rotation about a single axis. The first and second jaws have wedging elements for prying a staple away from a stapled article, gripping elements for grasping opposing sides of a partially disengaged or sheared staple, at least one wire engaging edge for cutting wire and arms to provide the operator with increased leverage.
U.S. Pat. No. 5,513,833, issued May 7, 1996 to Kirk, is for a device for removing a U-shaped staple pin of the type that has opposing arms driven into a surface that includes, in part, a grip portion and a lower and upper jaw pivotally mounted within said grip portion. The lower and upper jaw each include a base portion and integrally formed sides. The lower jaw cooperates with the upper jaw for movably engaging and upwardly displacing the driven staple pin from the surface. A rigid tongue member is affixed to the base and between the sides of the lower jaw. The rigid member forcibly bends the displaced staple pin substantially in half as the lower and upper jaws move the displaced staple pin into contact with the rigid member. Such forcible bending of the staple pin further causes the arms of the pin to rotate outwardly and uniformly disengage from the surface. A resilient member mounted on the base and between the sides of the upper jaw ejects the disengaged staple pin from the staple remover.
U.S. Pat. No. 5,918,859, issued Jul. 6, 1999 to Qian, provides a simple staple remover that has pair of slots in the claws of the jaws for complete removal of a staple with one action, avoiding one leg of the staple remaining in the object while the other leg is dislodged.
While a number of patents provide staple gripping mean on the same side as the
Carlson Donald G.
Smith Lynn
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