US2392160A

US2392160A - Method of driving staples

Info

Publication number: US2392160A
Application number: US457166A
Authority: US
Inventors: Place Desmond R La
Original assignee: BOCJL Corp
Current assignee: BOCJL Corp
Priority date: 1942-09-03
Filing date: 1942-09-03
Publication date: 1946-01-01
Anticipated expiration: 1963-01-01

Description

Jan. l., 1946. D, R, A PLACE 2,392,160

METHOD OF DRIVING STAPLES Filed Sept. 3, 1942 Patented Jan. 1, 1946 i UNITED 'STATE assalto.

M E'rnon or DRIVING STAPLES v Desmond R. La'llace, Pittsburgh, Pa., assignor to Bocjl Corporation, a corporation of Delaware y Application September 3, 1942, Serial No. 457,166

8 Claims.

This invention pertains to the art of stapling and isa continuation-impart of my copending Vapplications Serial No. 386,497, filed April 2, 1941 for improvements in kFasteners and method of fastening and Serial No. 386,498-, led April 2, 1941 for Stapling hammer. The invention is also related to my copending application Serial No. 457,165, filed September 3, 19,42 for Method and apparatus for stapling. v

In the iirst of the foregoing applications there is disclosed a staple having a top portion which is connected to substantially parallel leg portions through relatively small extensions forming connections between the legs and the head. The head and the legs are normally in substantially a plane so that the fasteners may be arranged in rows in face to face relation. Moreover, the fasteners are shaped'so that the rows may be arranged when desired in point to back relation with the head portions of the staples of one row extending up between the legs of the staples of the row above. These staples are designed to be driven by effecting relative rotation between the head portion and the leg portion of each staple until the head portion is at substantially right angles to the legs. The head then presents a relatively largev surface to the underlying material and such staple is intended to replace large headed nails or tacks such as those used for securing roofing or sheathing paper to a wooden structure or such as the tacks used for securing upholstery to a wooden frame. I refer-to such staples as tilt-top staples. 1

In the second application above referred to, I have disclosed a driving tool in the form of a hammer for driving staples of this type. In the specific form of hammer illustrated the staples are delivered one at a time to the-guide of the stapling tool. They are engaged by a driver which simultaneously starts to drive the staple 4and rotate the head relatively to the legs. Be-

fore the staple has been completely driven the rotation of the head has been completed vand in the final operation the head of the staple lies fiat against the surface into which the staple has been driven. In the third application above referred to the head of the staple is confined in a plane while the legs are turned relatively to the head. This is accomplished asa step in the driving operation but the movement of the legs of course occurs before the points of the legs have penetrated the surface into which they are to be driven. The said application is specific to that particular method and to a driving tool for accomplishing that method. l f

'The present application is directed generically to the method of kstapling wherein relative rotation is effected between the head and the legs of the staple to turn the head from the plane of the legs to a plane substantially perpendicular .to the legs. It is directed specically to the method which comprises rotating or tilting the head relatively to the legs and more especially to the method of accomplishing the turning of the head and the driving of the staple in a single stroke of the driver.

The invention may be more fully understood byreference to the accompanying drawing,in which:

Figure 1 is a front elevation more or less schematically showing a stapling tool with thestaple in place therein in position to bedriven, part of the tool being shown in section;

Figure 2 is a'transverse vertical section through Figure 1, the staple, however, being shown in elevation; Y

Figure 3 is a transverse horizontal section in substantially the plane of line III- III of Figure 1, the top plan elevation of the staple being shown;

Figure 4 is a view similar to Figure 1 showing the beginning of the driving of the staple.;

Figure 5 isa view similar to Figure 2 showing the beginning of the driving of the staple;

Figure 6 is a View similar to Figure 5 showing a further step in the driving of the staple in which the head of the staple has been turned;

Figure 7 is a View similar to Figure 4 but showing the completion of the driving stroke;

Figure 8 is a top plan view of the staple after it has been driven;

Figure 9 is a view similar to Figure 1 in which the staple is illustrated as being formed of wire; and

`V.Figure 10 is a view similar to Figure 5 showing la step in the driving of a wire'staple.

Referring first to Figures 1 to 8, inclusive, the staple or fastener designated generally as 2 has substantially parallel legs 3 and a disk-like top 4 which is narrower than the distance between the legs. The top orhead of the staple 4 is connected with legs through lateral extensions 5. The head and the legs, as clearly shown in Figure 2, are substantially in a plane.

The driving tool, designated generally as 6, comprises a guide having parallel side members 1 in'which reciprocates a driver 8. The inner faces of the guides 1 are provided with' grooves or channels 9 as best shown in Figures l1 and 3, these channels being deep enough to receive the-legs pushed down fbyetheidriver.

:iErom .vthexforegoing ;it 'isfapparent that l}ha,ve

Imnemdingf.acrossfbridge 8.5; In,zvonerat1.0.1.1..iv

of the staple and being of a width such that the legs of the staple have a sliding flt therein, th'e channels, however, being so spaced that the head 4 of the staple is clear of the guides and channels. The two legs 'I are connected by a web Ill and the web I is spaced from the channels 9 a sufficient distance to allow th'e head to rotate from a, vertical to a horizontal plane, the clearance space infront of the web I0 being designated lil.. i

The driver "8 hasa substantially square end face I2 in the center of which is a rounded def pression I3 which, however, is of less width than the over all width of the staple and iwhiqh 9120* videsV a camming surface for turning the head of the staple as hereinaftermore:fully-described.

The manner in which the stapleiis fedintothe guide forms no part of the gpresent invention, a

complete machinefor driving the staple being illustrated in my copending application y"Serial *No 13863498. v:It :may:befstatedfhowever, .thatzthe .stapleds -.-.delivered tothe-driving tool Tin ifa plane gabove.fthegpiosition.-.in which itisfshownin Figures andt2 .andiis .-rnoveddownfto the positionshown iin Figure 1 fwhererit .Its in-.the channels "3 1in .the iportions 'I v of theguideI-as a preliminaryfstep .to .thegactual ydriving .f of the .staple -WhenY the staple isftofloe-.driven,-,downward pressuraomthe tdrivser f8 fis -exerted ..,against :the -top :edge of =.t he

head 4 .of i the staple. .Thisf causesythe pcilllsof the staple to start to penetrate theA material ;X

`into liwhichethe staple beingdriven. Atfthe.

:same :timeall ,of ther contact -fbetween the-.staple and the driver takes place on the inclined for lvroundedfsurf-aoe -fl3. .vf-As .resistance to the/ downward movement :of the .staple increasesthe face :t3 starts tolcam=the ahead 4-atofthefposition shown in Figure fandeventually the .head als l iturnedto the,f. position;shown=;finFigure6. :When A.the head-.of the s staple fhas been .turned Eltcogthe horizontal position the flat part of the drivenat .-aofrthe fstaplematgpointsv .abovet the; top fofiftlie 1.- legs reach'sidefoiythefsurfacerIf31alsoengages therbridge sand continued fpressure thereupon adr-ives.` the staple all the way down. It will` be notedpthat :thesinwardlyf-oflset portions-'Sand .the decreased widtheofS-tl-iel Ihead portion enable the'fheadto v :clear thel g-roovesfinthefguideso thattthisjfpart of thefstaples freef.to...tu.rn1.while the-legsthemiselyesfare `confined by 'the groovesV llzto a fvertical x,theyoservew as .aflg-uid-e efor` .theestaple :.-asfitislbeing provided a method of driving;tilttpfstaples x in l which; :the-fstaples :havefheadfandale l portions :which -are #initially einfthecsamegplane. VAccording to the method one part of the staple is'rotated driver .orinother Ways.

In the modification;showin in-Ei'gures:9.-:and .10 1 vthe f methode @is substantially'qthereame; butgthe :staple-is illustrated:asbeingzformedfpffwire. I -SlnV tthisacase the stame has.legeportionsf;Issatgtne etopleofvwhich: arev lfinwardly'; offset"zslioulders l ,46.

legs I5 are received in the guides of the stapling chute while the head portion I'I, being offset inwardly from the legs, is clear of these guides. 'Y

clearance space Ill ,is necessary. The staple` Mshown 'jin-Eigurel, however, has la greater holding power when fully driven due to the fact that :anyjorcetendingto lift one edge of the head of the nstaple upwardly away from the surface `Aofthe material X is resisted by the opposite por- :GOn :9i *121.16 head ..0.f 1.1T/1?@ Seple fbe'lng -.dQWn ..againstthesurfacepf thesaidrmaterlial X.

.v-vAlsofittis explainedin Amy copending applicar -.tion,. seria1 No.l 4571.65,.tnattheibrqad,conception of frny method contemplates zthe turning Qoff the legs .of .the i staple .while 4vholding `the headfsti well-asturningtheheadgwhilmholding tlie f inafplane.

While I have illustratedgand. described ,certain r.spooio embodiments ofriy inventiopfandoappa- .rotos forooooomplishioeoho'somo it will hiimfoorStood-ihat this .zisfloyww roof. illustrati brood .that-.various chooses-:ood'modifiooioris omoofooooolotod Within :the es oorzo .of fthe iolloivioe @loi-ms Y ',Ifolaimfasmymveniqnl .-:1. Illia-method @ofesoooliog fwholtolnafoho-fooo1olo ...has head f and les f portions .oloooooooootlwooeh offset -;oonoootions loll .foompsoo .fooofliirig one .of-.Saidenolftiooezio-geologieand; rootlinatho zobhorfi-.neonoro obolltvfihooo ...anaxisauniilfoooportion .foorpooolioulorttottlio .other land thon 'ne folio etooloHH-til tho fhood oporiionsis; not eeoiooffthowork inboiwliifoh theotaolofis driven 2. .The mod offoiololioe whoroinfihofotosl-os orminarosolonf oodzol f Uitl-@'55 Weenrthe1=153g=af01m finepporoion, whloh ;comprioos oonfmoe ono/.of end zrortionseioofolooeooot rotating :olio/other fnTanarofabWt onzoXlS offeotioflihaltro the head-forming porti n1 until I v substantially fporooridio Aorf-@llo :ftlooeotoon sono .thon driving-:the loef f.. .nllgg :portionootoffthe .workfunti1 othoinood .oolooooatiall .ootioeaioot ,ztheawork Y v :L3-rinato@art.zoffdririneestaplesthavirewiltoble thoasamo dir ootion, the Stops; whloh @comprise oonnos the lossin;@plana-rotating .the head .too .ositionperpendicular hoihoi-loss., and than :df ....reptile...taillesfnntiljtheneaqfis ggggamst v:the Work. Y f.

:4;51he5method ofdrivnga. fastonerghaviugia head portion fand; -;a.f.leg,spQrtion .disposedr ccrnfrncm planeiiwbich bomprses initiaux/applyeioeseoeoprossuroetoatilo; hood Roltion.I oiithe .fastener .onolfrotolllg head .Qrtionf-.to o plane approxi-mately correo olor toitheeleegoortion l:our-.ineT-:ihondr-1V e.. f.-. the staple; 1 f 5.. ho-tmothodfof duri... s--o-iifaotono1h ino f loafoorigon. disposed ma afbeadeportl- ...Commonrfp anefwhlohfGO-.Hllre eli-Plym. lies- .heads and nsulostanoially-eporallel logsfpointineain' and rotating the head by such pressure to a plane approximately ninety degrees from its original plane during the operation of driving the staple and before it has become completely driven.

6. The method of driving a fastener having integral head and leg portions which comprises initially applying the driving pressure to an edge of the head portion, rotating the head portion to a plane approximately perpendicular to the leg portion and completing the driving by pressure in a direction normal to the plane of the head in its last mentioned position.

'7. The method of driving a fastener integrally formed from flat sheet metal and which has an enlarged head portion and a leg portion, the leg and head portions being disposed in a common plane which comprises rotating the head about a transverse axis relatively to the leg to twist the metal at the point of juncture between the head and the leg before the staple has been completely driven and during the operation of driving the same.

8. The method of driving a staple having a head portion and parallel leg portions attached to opposite sides of the head portion which comprises simultaneously driving the staple vertically and with a lateral component of pressure for rotating the head from a plane parallel with the legs to a plane approximately perpendicular thereto with a single blow from a driver.

DESMOND R. LA PLACE.