DE2300506A1 - STAPLE REMOVER - Google Patents

Description

PATENT LAWYERS DIPL.-ING. LEO FLEUCHAUS DR.-ING. HANS LEYH

Some 71,

Melchloretr. 42 4.1.1973 Our reference: A19P-912

Swingline Inc. 32-00 Skillman Avenue Long Island City, New York 11101 V.St.A.

Staple remover

The invention relates to a staple remover with two elongated and articulated to one another at one end connected arms, each having claws directed towards one another at their other ends, the claws at Compression of the arms against the force of an expansion prestress are displaceable against each other under a staple and lift them when they come into engagement.

There are a variety of devices for removing staples known, but due to their structural and formal design with one or more of the following mentioned disadvantages are afflicted. These disadvantages are as follows;

1. The staple removers are made up of a large number of individual parts manufactured, whereby the assembly and the Hrstellung

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becomes more difficult and much more expensive.

2. The orientation of the claws pulling out the staples relative to each other is relatively difficult to maintain, so that proper function is not always guaranteed.

3. The staple removers are clumsy to use, so that damage to the surface from which the staple is to be pulled is often unavoidable.

The invention is based on the object of a staple remover to create, which overcomes the disadvantages mentioned and is very simple due to its structural and shaping structure can be produced with the greatest possible avoidance of assembly costs. The design should ensure that a good alignment of the claws against each other can be maintained at all times to ensure effective use, without damaging the surface of the material from which the staple is to be withdrawn. In the end the staple remover should also be very light and withstand frequent use even if handled carelessly.

This object is achieved according to the invention in that the staple remover is made in one piece from a uniform material, preferably plastic, and that on the arms opposing and mutually engaging guide lugs are formed, which the pivoting movement of the Limit arms relative to each other to a certain angular range.

Further refinements of the invention are the subject matter of further ones Claims.

A particularly advantageous embodiment of the invention leads to

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a one-piece injection-molded from / a suitable plastic material Staple remover, e.g. for the production of acetal homopolomers Can be used. The staple remover consists of two elongated arms that extend over at one end a resilient connecting bracket are connected and at their free ends have claws which when the staple remover is pressed together interlock. The spreading pretension by the resilient connecting bracket is sufficient around the staple remover hold in an open position. To limit the open position, mutually facing and sliding with one another Engaging guide lugs provided which are provided with limiting devices for the pivoting movement of the arms. These limiting devices preferably consist of a bolt-like projection on which a guide attachment and one corresponding curved longitudinal recess on the other guides approach, the bolt-like projection being guided in the longitudinal recess. Through this interaction of the limiting devices as well as the guide lugs a relative pivoting movement of the arms is ensured within a given angular range. During this pivoting movement, the claws are very precisely aligned so that when they are brought together Arms slide smoothly along each other in the closed position of the staple remover and twisting of the staple remover is avoided during actuation. The twisting of the claws themselves is prevented by a spacer, between the respective individual claws from the assigned arm in the space between the individual claws up to one such a point that the staple remover closes completely still allows. The staple remover according to the invention configured in this way is very simple can be manufactured by injection molding and requires practically no assembly costs, so that it is extremely cheap to manufacture. Included the structural and shaping design ensures that the alignment of the claws in every operating

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position is maintained and also the damage to the surface the object from which the staple is to be pulled out, can be avoided because the staple remover is extremely rigid.

Further details and advantages of the invention emerge from the following description of an exemplary embodiment in conjunction with the claims characterizing the invention individually as well as in any combination and the drawing.

Show it:

Figure 1 is a side view of a one-piece staple remover in the position when removing from the mold or injection mold or the like;

2 shows a side view of the staple remover in an open position caused by the material stresses;

3 is a side view of the staple remover in a closed position caused by finger pressure with a staple pulled out;

FIG. 4 is a plan view of the staple remover of FIG. 2;

FIG. 5 shows a view of the staple remover according to FIG. 2 from below; FIG.

FIG. 6 shows a vertical section through the staple remover in the tension-free position according to FIG. 1.

In the drawing, a staple remover 10 is shown, which is made from a suitable plastic material, e.g. from acetal homo-

-A- polymers

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polymer is injected. In the position shown in FIG the staple remover 10 is injected and out of the injection mold taken.

The staple remover 10 includes two elongated arms 11 and 12, each with a respective end through a
compliant connecting bracket 13 are connected. When the arms are squeezed together, this connecting bracket 13 creates a material pretension which tends to return the two arms 11 and 12 to the position of the staple remover shown in FIG. This material tension also holds the staple remover IO in the open position shown in FIG. 2. A chordwise extending rib 13 * may be formed inside of the connector bracket 13 to reinforce them and prevent material fatigue, regardless of the frequency of use of the staple remover _/ wherein
the two arms are pressed against each other to pull out a staple.

The free ends of the two arms are provided with claws 14 and 15 which interact in a complementary manner. The claw 14 consists of two individual claws 14 a and 14 b, which are arranged in parallel at a distance from one another and which are arranged on the two sides of the arm 11
and point towards the other arm 12 transversely to the longitudinal direction of the arm. The two individual claws are designed in the same way and merge into a point W at the end of a curved underside X. The tips W of the two individual claws are shown in FIG. 3
designed such that they can be inserted between the bracket K of a staple S and the surface Y of the object in which the staple is inserted when the adhesive clip remover 10 is pressed together as shown in FIG.

The claw 15 on the arm 12 also consists of two individual claws 15a and 15b spaced substantially parallel to each other

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protrude from the arm 12 and run in the direction of the arm 11. The distance between the two individual claws 15a and 15b is smaller than the distance between the single claws 14a and 14b so that the single claws 15a and 15b between the single claws 14a and 14b fit and engage between them when the staple remover with the help of two fingers F into the position shown in Fig. 3, closed position B is compressed. The single claws 15a and 15b are formed in the same way as the single claws 14a and 14b, the curved underside X ending in a point W.

The upper side U of the individual claws 14a and 14b and 15a and 15b each run in a gently curved curve from the tip W out to the top. Thus, when the staple remover is squeezed, the claws under the bracket K of the staple S. shifted against each other, with the bracket shifted along the top U of the claws, and thus the staple upwards out the surface Y of the article in which it is inserted.

In order to be able to operate the staple remover easily, lugs 16 protruding laterally are provided on each arm. These lugs 16 are shaped so that when the staple remover is operated, the fingertip F rests comfortably against it in the correct position and brings about a favorable effect of the force exerted.

So that the individual claws are each in the correct parallel alignment remain to each other and a bending of the interacting single claws when you squeeze the staple remover is prevented, spacers 14c and 15c are attached between the associated individual claws, the individual claws Connect and stiffen transversely. These spacers 14c and 15c are shown in Fig. 6 recognizable in section. In

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the 'in' Fig. The spacers run in the spray position A shown in FIG 14c and 15c parallel to each other essentially in the vertical direction, so that when pulling out the staple remover from the injection mold do not constitute a hindrance.

Between the arms 11 and 12 extend transversely to the same guide lugs 17 and 18, each two at a distance have guide sections 17a and 17b and 18a and 18b which run essentially parallel to one another. The single claw 14a and the guide section 17a lie in one plane, which also applies to the individual claw 14b and the guide section 17b. Is the same also with the. Individual claws 15a and 15b and the guide sections 18a and 18b the case. Like the individual claws, the guide sections slide against one another when the staple remover is pressed together and increase the strength of the arms 11 and 12, both in terms of bending and twisting when in use the staple remover to pull out a staple.

The two guide sections 17a and 17b are provided with a curved elongated recess which has the shape of a the guide section penetrating slot 20 can accept. The midpoint of the curve along which the curvature runs, coincides with the center of the curved trajectory of the tips W of the claws when they are pressed together with the staple remover be pivoted against each other. The same applies to the curvature of the underside X of the individual claws to.

On the two guide sections 18a and 18b is on the outside a small outwardly protruding bolt 21 is provided, which can be inserted into the slot 20 and along the slot when compressed of the staple remover is slidable.

The surface Z of the bolt 21 facing towards the arm 11 is

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somewhat chamfered so that the pin has a larger cross-section at "its base than at its front end. This oblique Surface has a cam effect when the staple remover moves from position A, according to FIG. 1, to position C, according to FIG. 2, is brought. In doing so, the two interacting Guide sections 17a and 18a and 17b and 18b bent against each other until the respective bolt 21 in the associated The slot 20 snaps into place and the two guide sections spring back. By now engaged in the slots 20 Bolt 21, the staple remover is held in the open position according to FIG. The length of the bolt 21 corresponds approximately the thickness of the associated guide sections 18a or 18b.

The two bolts and the two slots essentially have two functions:

1. becomes the pivot angle of the two claws of the staple remover limited to a certain section, which in the described and illustrated embodiment approximately in the Size of 26 °.

2. the position of the claws to one another, i.e. the position in the open position of the staple remover, is determined as this is shown in FIG. Furthermore, through the interaction of the bolts and the slots, the pivoting movement of the two Arms against each other, i.e. the dipping of the opposing claws when pulling out a staple, limited will. However, this function is usually taken over by the front edges of the guide sections 18a and 18b, which are shown in FIG fully closed position of the staple remover on the inner surface of the opposite arm 11 as shown in FIG. 3 come to a stop. Due to the shape of both the bolts and the slots 20 care is taken that the curved Undersides X of the individual claws 14a and 14b and 15a and 15b always run along a common circular line and each other

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do not offset either downwards or upwards against each other. This offsetting is a common disadvantage with known staple removers, thereby reducing the effectiveness of the remover as the tips of the claws are no longer exactly under the handle of the staple to be removed is guided. Furthermore, since the guide portions 17a and 18a and 17b and 18b with the against each other directed surfaces slide along each other when the two arms 11 and 12 are pressed against each other care is also taken that a lateral displacement of the claws to one another is avoided.

In the illustrated embodiment, the bolts 21 on the guide sections 18a and 18b and the slots 20 on the Guide sections 17a and 17b attached. However, a reverse arrangement of these two elements is also possible, with in this case, the bolts 21 extend inwardly from the inner surface of the guide portions 17a and 17b and protrude through corresponding slots 20 in the guide sections 18a and 18b. With this modified design of the staple remover its mode of operation is neither impaired nor changed.

In a further, not shown embodiment of the staple remover the guide sections 18a and 18b can be replaced by a single, centrally arranged section, the is provided with a bolt at its front end. This section runs between two arranged on the opposite arm Sections 17a and 17b, which are essentially parallel to one another, but closer to one another. The distance between these two Guide sections 17a and 17b is preferably only so large that the only guide section carrying the bolt between the two sections 17a and 17b, sliding along these engages when the staple remover is pressed together. The one above described staple remover according to the invention

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is constructed in a very simple way and can be extremely cost-saving getting produced. The special, constructive structure results in a compact and very robust one Device, care being taken that the claws when brought together against each other, both with regard to their heights as also their lateral position to one another exactly along a circular line to be led. This makes removing a staple much easier, as the tips of the claws are exactly below the handle of the staple.

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Claims (9)

Claims A 19P-912 Staple remover with two elongated and attached to each one end articulated arms connected to one another, each facing one another at their other ends ,. , Claws, the claws when the Arms against the force of a spreading bias against each other under a staple are displaceable and this when raise mutual engagement, characterized in that the staple remover (10) is made in one piece from a uniform material, preferably plastic and that on the arms (11, 12) guide lugs (17, 18; 20, 21) which point towards one another and come into engagement with one another are formed limit the pivoting movement of the arms relative to one another to a certain angular range. 2. staple remover according to claim 1, characterized in that the guide lugs form-fit in Engaging limiting devices (20, 21) comprise. 3. staple remover according to claim 1 or 2, characterized in that the positively engaged standing limiting devices from a curved longitudinal recess (20) and a bolt-shaped in the longitudinal recess sliding projection (21) exist, wherein the center of the locus of the curved longitudinal recess with the center coincides with the circular line on which the claws move against each other. 3 0 9 8 4 37 0 3 7 2 A19P-912 4. staple remover according to claim 1, characterized in that the guide lugs (17, 18) from at least consist of a disc-like tab protruding from the respective arm, one of which is curved Longitudinal slot and the other has a bolt-like projection that the two tabs when the Slide the staple remover along each other and the bolt-like projection moves along in the curved longitudinal slot and the relative movement of the arms against each other limited, in the, the open position of the two arms against each other associated position of the staple remover the preload is still acting on the arms. 5. 'staple remover according to claim 1, characterized in that the guide lugs each consist of two tab sections (17a, 17b and 18a, 18b) running essentially parallel to one another at a given distance exist, the tab sections mutually directed against each other in pairs slidingly interlocked that on the one pair the tab sections are bolt-like projections, which engage in corresponding longitudinal recesses attached to the other pair of tab sections and that the bolt-like Projections in the longitudinal recesses are guided along when pivoting the arms relative to each other and the Limit the angular range of the swivel movement. 6. staple remover according to one or more of claims 1 to 5, characterized in that the bolt-like projections are provided with a bevel, so that their cross-sectional area at the base is larger than at the free end. 7. staple remover according to one or more of claims 1 to 6, characterized in that the 309843/0372 A19P-912 both arms at their upper area by a flexible one Connecting bracket (13) connected and provided in their central area with lateral lugs (16), the Lateral approaches a suitable surface for operating the staple & staple remover with two fingers offers. 8. staple remover according to one or more of claims 1 to 7, characterized in that between spacers (14c, 15c) extending transversely to the claws arranged in pairs on the arms are arranged, which the Ensure parallel position of the individual claws against each other. 9. staple remover according to one or more of claims 1 to 8, characterized g e k e η η ζ e i c h η e t that when Squeezing the staple remover from a tension-free Position (A) in an open position (C) suitable for operation, the limiting devices (20, 21) preferably snap into one another from the bolt-like projections and the curved longitudinal recesses. 309843/0372 Empty e