Патент USA US2110366код для вставки
March 8, _1938. ` s. G. JoHNsoN 2,110,366 LOOSE -LEAF BINDER Filed Feb. 8, 1936 55 f5 2 Sheets-Shec + l v /Jí 4@ 47 Z2. /JQM l INVENTOR. ' J7@ ' f Marchs,193s. ` s, @JOHNSON ' 2,110,366 LOOSE LEAF BINDER Filed Feb. 8, 195e _ u /Áì‘î . l ¿_ B` ’ 2 sr\ee,»ts-she¢+v 2 l INVENTOR, » 5kg/¿yá‘foi/1502i ATTORNEY. 2 , anew are preferably intensi with the mit. n dnd zi, of the horizontally disposed operating key Il of however, they may be formed separate there» the said locking- lever 4|. A suitably disposed from `and. secured thereto in any suitable man ratchet type detent Il secured to the angle 2l ~ ner. or end piece 24 is engaged _by the locking finger rtwiiibenotedtnnttneendpieœn n and 2s. I! as the binder is closed from the position shown 5 and the end pieces Il and 2l cooperate with each in Hg. 5 to the positions'shown in Hg. 4y and Hg. other to 'form end closures at the U-.shaped back 3. ' When closing the binder the lockingßnger 3l. 'I‘hesaidpairsofendpiecesalsoserveasa l! of the locking lever Il acts as a pawl or click riding over the ratchet type detent Il. Any numbernintcnetteetnmaybeundinthede ic _ tent yIl in order to provide alike number of par~ tially opened positions of the binder. stinening a'nd guide means to maintain the 'up lo standing legs of the hinged angles in their normal position. 'lhe end closure comprising end pieces 26 and‘ It are straddled by a novel anti-racking locking _lever as hereinafter described, the said“V 15 . The- cover assembly comprising front and backV y locking lever being pivotally mounted on the‘end covers 8i and it respectively and thou-shaped y piece 2l.’ back Il are secured in the proper relationship to l5 f ' v ‘ The upstanding legs of angles 2l and Il are the metal angle back by‘means yof rivets il provided with a plurality of substantially frusto- , punched thi-ouah the said U-shaped back into conical shaped depressions 21 having half` round apertures 2l punched through the base of the said 20 depressions 21. The said apertures 28 are pref erably arranged in the staggered relation indi cated in Pig. 'I'in order that left hand prongs Il and right hand prongs il may be seeured'to an registrywith aperturesIfintheupiitandinglegii`> of the angles U~shaped Il and back 2i. 'nie il are 'top‘and each provided bottom sides with 20 a punched binder board illier strip‘ll _and a se euringstrip lapreferablyofpressedflberboard. The finer strip Il has suitably spaced apertura 4I therein to receive the protuberances on tbs 25 prongs cooperate with eachother'toform aringv outside of the upstanding ieg of the anglesfll 25 when ythe binder is partially or fully `closed and and 2| land the Ahead Il formedon the butt end _the extreme or outsidel‘prongs of the binder are> of the leaf impaling prongs l’ and Il.. thereby ' opposite hand. When extreme prongs of the Y permitting the filler _strip I1 and the securing'V gies Itandfl insuchamannerthatopposed binder are oppositehand and positioned in oppo- « 30 sitely facing ‘directions the punched filler sheets Il are more readily andsureiv luided and main strip“ to be secured to the‘said metal angle f back in parallel 'relationship thereto as best il- 3° lustrated in Figs. l, 2, 3, 4„and 5. The center of» '_the U-shaped back 33 is preferably notched 0l!` binder in'its closed,partly opened andopen posi the inside thereof as indicated by tllieliulnel‘al` tainedinstackedrelationshipduringuseofthe tion. *35 ' ' f ' ` mupstnnding‘imœ mais :s and si ofthe metal angle back are also» provided with aper' - nin-the drawings tepel-mit sim-p centi-ni con cdved sexing di the tnid u-'mnped mx u but; 3° 4shown in l'lgs. .4 and 5. ` tures.: through which the U-lhabed back ’l is,` ‘ In the manufacture of loose leaf binders hav' .securedtotnenidsnsiebackuhereinsrterde scribed.' Eachupstanding legofangles Il'andll »40 is bent outward at its upper edge to provide a lon-i gitudinally disposed _strip u by. means of which a neat abutment is made between ; the metal angle back and the flexible Joint-secur 45‘ing thefrontand back covers 8l and Il respec tivelytothe U-shapedback Il. I , , i - inghaifroundopposed leaf impaiing prongs which` cooperate with each other to‘form a ring when vtimehinderispiirtiiiiiyori'iiiiyciosed.moduli-»4° culty of adjusting the opposed prongs into a` position of accin'ate cooperation with eachother has caused great expense inthe manufacture. A material lesseningof cost of parts and the per centage ofrejectsin themanufacture and assesn-` ‘5 Thebinge leg of the angle Il is -provided with ’bl'yof looseleaf binders of the split prong type aninwardlydisposedtabi‘lusedtoretainthe springuofthelockingdeviceinitsproper posi 60 tion.` An aperture Il through the end piece 2l of the angle-2i is suitably disposed to receive a ` rivet la which securesthe locking lever 4I in piv otal reiationshipto the end piece It.V Referring now particularly ,to Pigs. 2, 3, 4, 5 55 and6.thenovellockingdevicecomprisesalocking lever. Il having a locking finger I2, an operat ing key ‘I and an inverted U~shaped central por ‘tion u through which therivet Il secures the siiid> locking lever Il in ypivotal relationship `izo-the end llece 2l. _The central portion Il of the said has been accomplished by thcherein disclosed structure and’method of manufacture ofprongs` and ‘angle backs. and the assembly of the prongs-` intoptne mit hun roudwed-by, n anni adida- ‘5° ment of the position of the entireprongiri;rie--` ‘ spect to the angle back ai’terassembly.l In the 'angle back, as hereinbefore described. 1 theupstanding legs of the angles 2l and 2| are provided with n plurality or nihstnntiniiy mist@ 5.5 conical shaped depressions 2"` having half round apertures 28 punched through the base of the said depressions". Referring to Figs. 18 and 17 it will be noted thaty in forming the frusto-conical locking lever Il bridges over or straddles the end i depressions that the metal at the periphery there'- . 00 t piece 2l in such a manner that the spring 'Il ofïhas been drawn thinner than the metal at the coiled around the rivet 4I maintains the locking _base of the depression 21 and thinner thanthe‘ i'ingerA ‘l ofthe said locking lever in suiilcient` metal of the angle back Il. i vAfter the prongsïll` and“ are secured tothe base of the depressions ' 65 spaced relationship to the end piece 2l as to per mit the end piece Il to rotate between the said their position in relation to the surface of the' §45k ' finger 42 and the end piece 2t when the binder isv upstanding legs of angles 2l and 2| may be ad- ' being'opened and closed. 'me spring n eoii‘ed around the rivet Il has one end'retaine'd in a ' .m nxed position Vnimmst tne’hinse ieg o: angie zi ' `between the inwardly disposed tab .l1 thmof and the end piece” thereof. while the other end of ' the'spring 38 constantly urges the locking lever 4I to rotatetoward its locked position by means ‘15 of the'constant pressure exerted on the justedby tripping the yprongs Il and 8l near the shoulders It at the butt end thereof and changing the plane of .thebase of the frusta-conical depres sions I'I, an example of said adjustment being 70 by the dot and dashlines'll'inï ' It isessentialv that a pliable accurate prong'is provided inasmuch as the aforementioned adiust- ' ment ofthe position of the prongs in relationto 75 3 . 2,110,866 the surface of the upstanding legs of angles 20 and 2| is not the only adjustment required after assembly to assure the perfect registry of opposed prongs; in many cases the prongs per se must also be bent. It is impossible to mill the prongs flat from an umet round Wire without leaving an undesirable fillet between the flat surface and up set head thereof. Die castings do not lend them selves to pliability. Also, milled and die cast 10 prongs have been found to be from four to six times as expensive as the making of half round arcuate prongs by the method herein disclosed. Referring now to Figs. 9 to 15 inclusive, round Wire stock 5| is either rolled or extruded into 15 stock of the desired cross section which, in the embodiment of the invention disclosed, is sub stantially half round as indicated by the numeral 52 in Fig. 9. The stock is then cut into blanks 53 of the proper length as shown in Fig. 10. The blanks 53 are then inserted into a holding 20 die 54 while a female shouldering and heading die 55 is brought against the end of the blank 53 protruding from the holding die 54 to form a shoulder 56 an'd a concaved butt 51 as indicated 25 in the drawings. The concaved butt 51 is pre ferred to the usual flat butt inasmuch as it aids in forming a symmetrical prong securing head 58 without excessive heat when the prongs are se cured by means of resistance welding. When up .30 setting the concaved butt 51 into a prong securing head 58 as in a riveting operation, it has been found that the use of a concaved butt 51 mate in relation to the angle back and at the same time remove the shoulders at the base of the prongs from interference with the punched filler sheets. The locking device is of a novel character which minimizes racking and distortion when opening and closing the binder, the minimizing of distortion of the parts of the binder being es sential to long life and maintenance >of the op posed leaf-impaling prongs in operating relation ship to each other for accuratelyv guiding and en 10 gaging filler sheets. ` Although but one embodiment of this invention and one particular application of this method has been shown and described, it'will be understood that numerous variations of the method may be 15 had, and that numerous changes including `the size, shape, arrangement and details of the vari ous parts hereof may be made without departing from the spirit of my invention, and it is not in tended to limit the scope thereof other than by 20 the terms of the appended claim. ' I claim: In a hinged angle back loose leaf binder having impaling prongs adapted to engage punched filler sheets when the binder is partially or fully closed, 25 the combination of end pieces on the angle back in pairs cooperating to form end closures, a lock ing lever pivotally mounted on one end piece lat erally spaced therefrom and having a portion thereof straddling said end piece of one end clos 30. ure, a detent on the other end piece of said end closure, a spring around said pivotal mounting between the lever and the end piece to which it is ' The preferred method of manufacture of pivoted constantly urging said locking lever'into registry >with said detent also adapted to maintain 35 prongs and assembly into hinged angle back the said locking lever in suñlcient spaced relation metals disclosed herein and the two adjustments of the position of prongs after assembly provides to the end piece on which it is mounted to permit the other end piece to rotate therebetween when ¿an improved method of inexpensive quantity pro the binder is being opened and closed, and an duction of split prong loose leaf binders with op rially aids in providing tightly secured prongs. 40 posed leaf engaging prongs in accurate relation to each other. ` The frusto-conical shaped depressions provide an essential function of adjustability of prongs operating key adjacent said straddling portion of said locking lever therefor for manually releasing said locking device. STANLEY G. JOHNSON.