US2518485A - Staple extractor - Google Patents

Description

1950' A H. MAYEARD 2,518,485

' STAPLE EXTRACTOR Filed June 4, 1947 fiz den Z 01":

- fiZhurHMqI Rard Patented Aug. 15, 1950 UNITED STATES STAPLE EXTRACTOR Arthur H. Maynard, Warwick, R. L, assignor, by

mesne assignments, to Bostitch, Inc., a corporation of Rhode Island Application June 4, 1947, Serial No. 752,539

2 Claims.

This invention relates to staple-extractors for removing staples and like fasteners from papers or other articles held together thereby.

One object of the invention is to provide a small, compact device of the type indicated which may be used as a desk implement or carried in the pocket.

Another object is to provide a device of the type indicated having a pointed blade for insertion under the head or crossbar of the staple and means combined therewith and movable relatively thereto to withdraw the staple without crinkling or buckling the'paper.

Another object is to provide a device of the type indicated which is more convenient to operate for extracting staples by causing their clinched legs to be straightened and withdrawn through the paper without tearing or otherwise mutilating it.

Another object is to provide a device of the type indicated which can be more readily inserted under the head of the staple and conveniently operated in one hand to quickly extract the staple.

Further objects of the invention are set forth in the following specification which describes a preferred form of construction of the device, by way of example, as illustrated by the accompanying drawing. In the drawing:

Fig. l is a side elevational view of the present improved staple-extractor;

Fig. 2 is a plan view of the same;

Fig. 3 is a side elevation of the device illustrating its method of operation and the relationship of its parts as the staple is withdrawn from the work;

Fig. 4 is a similar side elevation of the device illustrating the manner of inserting its cooperating blades under the head of the staple;

Fig. 5 is a greatly enlarged forward end view of the device showing the parts in position as the staple is first partly withdrawn from the work;

Fig. 6 is a similar view showing the parts of the device in position as the staple is completely withdrawn; and

Fig. 7 is an enlarged transverse sectional view online I--l' of Fig. 2 showing the concave-convex form of the main blade of the device and illustrating the manner in which the movable blade nests therein when in closed relationship.

Referring to the drawing, the present improved staple-extractor comprises a main member 2 constructed from a strip of flat sheet-metal with a rearwardly-projecting, inclined handle 3 of considerable length and a tapered blade 4 projecting forwardly in horizontal relationship at its end. The blade 4 is of novel form being generally pointed in plan view at its forward end with its point of extreme thinness in the vertical direc tion.

Mounted above the main element 2 and connected therewith to adapt it to rock relatively thereof is a finger-lever I having a forward blade 8 of substantially the same marginal contour as the main blade 4 with shoulders II and a convex under side to adapt it to seat within the con- 15 cavity in the main blade. The finger-lever 1 has a relatively flat horizontal portion 9 at the rearof the blade 8 and offset upwardly thereabove which is continued rearwardly in an angular arm terminating in an arcuate portion ill for receiving the pressure of the operators finger.

the main member 2 by means of a relatively fiat 1eaf-spring 12 having its rearward end fastened to the handle 3 by hollow rivets 13, while its forward end is attached to the under side of the flat portion 9 of the lever by rivets I4. The oilsetting of the fiat portion 9 of the lever 1 above.-

the bottom of the blade 8 provides a clearance space for the end of the spring l2 and the heads of the rivets, as shown in Fig. 1 of the drawing, so that the blade 8 may seat in the hollow of the lower blade 4 with the upper surfaces of both blades flush at the pointed ends. It will be observed by reference to Figs. 1 and 2 that normally :5; the spring l2 maintains the rearward finger-portion of the lever 1 rocked upwardly and its iorwardly-projecting blade 8 nested in the concavity of the lower blade 4, while permitting the lever 1 to be rocked to raise its blade 8 above the lower blade 4.

The present staple-extractor is adapted for convenient operation to withdraw staples from.

the work by being manipulated in the manner as next explained. The implement is grasped 45 in one hand with the fingers enclosing the handle-portion 3 of the member 2 and the thumb resting on the upper curved end ID of the fingerlever 1. Referring to Fig. 4, with the implement held in the hand in the manner explained it is r first tilted upwardly to incline the blades 4 and 8 at a sharp angle to the work, indicated at W, to,

adapt the pointed ends of the two blades to be inserted under the head or crossbar of the staple s. The blades 4 and B are then pushed forwardly under the head 01' the staple s and the imple-.

The finger-lever I is rockably mounted above ment tilted downwardly to cause the blades to slowly withdraw the staple as they assume a position with the rearward portion of the blade 4 lying substantially flat against the top of the work, see Fig. 5. At this juncture the shoulders 5 on the upper blade bring up against the legs of the staples as the latter is wedged or pried upwardly with respect-to. the work. W. Some care must be exercised not to press down on the finger-lever 1 until both blades 4 and 8 have been inserted under the head of the staple and forced therethrough with the legs of the staple:- in position abutting the shouldersfipon the lower blade and the corresponding shoulders l.,i. on.;the upper blade. In other words, to insure effective operation of the device both blades must be inserted under the head of the staple beforethe lever T is actuated. When this has been. apecomplished the curved end of the lever l is presseddownward to rockthe topblade 8 up,- ward intothe position shown inFigs. 3.1and 6', whereupon the. staple will be rapidly. withdrawn from theworkas its. legs are straightened to passfthrough. the holes in the paper or, other material.. As the lever. l. isrocliedflto. raise. the blade? the staple will usually be forcedupward with a sharp snap-action to cause it to fly into the air-away from the blade 8. In this way st plescan be very rapidly removed and ejected from.- the.irnp lementso asnot 'b0 clog it for furthenuse. Due to the fact that the legs of'the.

staplearebent outwardly from the clinchand straightened astheyride across the lateral edges. j

o f the lower blade ll-the paper or othermatje-rial; is ;not torn, orvotherwise damaged southatonly the- .original small holes remain therein.

ItyWill be. observed from. the. foregoing de-,.

scription that the present-device is of extreme simplicitycomprising. onlytwo, main parts; the

handle-member 2 and the.lever.l ,,with. aspring for connecting them in co-operative.- relation sh p Consequently, no. pins or other. pivoting;

means are required; and the implementamay; be; manufactured very economically by folf ning its; partsfrom stampings. each completed in a.v sin-v gle.;.operation. in a. die. The, sprin onnection betweenhthe finger-lever. i i andithe main ale-.- ment-a nsures; a ins loosen ssx nd may ee. tween... the parts, thus maintaining them inproper: registry so; that .;the blade Zion.- the. lever:

1..Wi11 always seat closely nested in theicencavity;

its-lateral edges a very thinpoint' isnprov-ided at; its-forward enditofacilitate its insentionunderthe-head of: a clinched: staplewith; the. upper...

nestedblade not materially increasing ,the-thicke ness;at..the point. Ithastbeen. demonstratedtthat;

the bladesmay bei'inserted under .the;.hea.d of: staple between its legs much: more easily. and;

with: less effort. than in. previously used: devices: in; which the two-blade portions overlap,..one. on: top of the; other. For-thisreason; the device is;

' illustrated as embodied in a preferred form of construction, it is to be understood that modificationsmaybemadein the shape and structure of the. parts without departing from the spirit or. scope of the: invention. Therefore, without limiting myself in this respect, I claim:

1; Animproved staple-extractor comprising a relatively flat strip-like member forming a handle with its forward end inclined at an angle thereto. and tapered to provide a pointed blade having curved marginal: edges terminating in arcuate shoulders at theirear and 'sliaped -to concavo-convex form in cross-section; a" fingerlever having a flat lower portion extending at=-an angle thereto with a blade offset downwardly from said flat portion and projectingforwardlytherefrom, said, blade shaped substantially to'the form of the main blade. andof convex form -on its under side to adapt itt'o seat inthe-concavity" of the main blade, andia leafespring riVetedto the. handle of the main member'at one-"end and extending forwardly therefrom in" abutting rela'-- tion to the under side of"the:fl'at"portionofthe finger-lever with. its; forward." end" fastened thereto. J y

2. Astaple-extractor comprisin'gga main'merm ber having .a ,handleeporti'on with a blade pro: jecting forwardly therefrom at'an. anglethere=- to, said. blade having a. pointed end 'tapered'to extreme thinness on, its marginal edge, a finger-lever comprising a. main. portion having. an" angular-.flatportion projecting forwardly there'- from with .a. pointedi-blade offset: downwardly. and projecting f.orwardly.from..the flatiiportion" of said finger-lever, said lbladevon the mainele ment having a'fiatlowerface and-a concavecl. recess. in its upperifacathebladei on the finger-- lever conforming in outline .tothat 'of the blade. on the main member and shapedfwith" a, convexbottomface-radapted to. seat. in the concavedrecess of the blade. on the main member with; its. fiat uppenface, fiushwith the upper face. there.- of, and a flat leaf-spring fastened at itsrear-a ward end..to. .the main; member. and. to the. under side. of. the, fiat. portion. .of. the.. finger-lever, band. so constructed? and arranged as to.-.maintai ri .tlie.- finger-lever. rocked; into. position to holdi..it's blade. firmly seated-in. the.bla.ole...ofv the...main.-v member. while... adapting it;...to.. baraised. theree above by. the .rocking m otion of said .fingereleizer.

ARTHUR MAYNARD.

REFERENCES CITED The -;-f0llowing references are of record in a thee file of this; patent;

UNITED STATES PATENTS 2,400,988" 7 Gb'essel May- 28;..194 6

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