US2339462A - Method of and machine for producing hairpins - Google Patents

Description

Jan. 18, 1944. A. c. DAY 2,339,462

METHOD OF AND MACHINE FOR PRODUCING HAIRPINS Filed Sept. 24, 1940 3 Sheets-Sheet 1 Jwa A. C. DAY

Jan. 18,- I944.

METHODOF AND MACHINE FOR PRODUCING HAIRPIHS Filed Sept. 24, 194D 5 Sheets-Sheet 2 Jan. 18,1944. A, C. DAY 2,339,462

METHOD OF AN D MACHINE FOR PRODUCING HAIRPINS.

Filed Sept. .24, 1940 3 Sheets-Sheet 3 Patented Jan. 18, 1944 UNITEDQ STATESi PATENT OFFICE METHOD 'OF AND MACHINE FOR PRODUCING HAIRPINS' tj Alfred Qarlyle Day, Bedfenn, near, Sydney, New

south walesyAustralia 4 Application September 24, 1940,:S erial No. 358.185 c In Australia september28, 1939 I 8 clai s, (o1. 140 s7) This invention relates to the production f hair-pins and particularly those known as bobbypins which hitherto have been produced frompreviously produced half round or flattened. wire, that is wire with a flat opposite-aconvexity, or which has been. flattened,.in cross section,

And this invention has been specially devisedn to provide an improved method of, and machine for, producing hair-pins, whereby :theprevious separate operation of .forming the, wire fhalf round? or fiat is avoided,. and theproduction of the pins is simplified, expedited and.cheapened, and ordinary wire round in cross section is drawn from a coil, straightened by beingdrawn through straightening means of any convenient known :construction, then drawn. between a pair of forming rollers, of which the 'peripheries are so shaped in cross section that the'indrawnlround wire is formed to desired cross sectional shape.

such as half round with the flat upwards, or

fiat; and then passes throughfeedaccommodatev ing means, and thence into parting and forming dies: in a suitable press whereby a length ofthe' wire or blank. to form .two pins is severed; and (l) advanced transversely'forward from the pathtof the incoming wire, and the twin blank is then advanced-successively to transverse or laterally forward positions where it is (2)"arched', has

each end slightly angled-is transversely 'corrua,

gated as desired, and has a length inwardly from each end bent upwards in a direction towardsthe arch, by operation of onedie,;-(3): the partially formed pair of pins at the next advanced position upon another lower die has eachd-iagonally upstanding end bent inwa'rdlyrand downwardly to-, it wards the middle :or arch of the twin blank by another part of the first die, (A) at a stillzfurther I advanced position, on another .co-actingllower die has each end bent down upon the 1arch,,('.5) whereafterat another advanced position the bow end ofeach pin is bent downwardly and engaged by a spring latch, and a-cutting punch severs the joined pair of fully formed pins so as to leave a rounded end on each at the severance, and as the severing is completed the two pins fall from the machine;

And in order that the invention and apracticalapplication thereof will be readily understoodthe same will now be described with reference to the accompanying drawings,.in which:

Figurel is a perspective of the'improved ma:

chine, known wire straightening'rneans and a coil of wire upon a turntablenot being shown-,

Fi u is a se o a el a i n=Qn1t enl e1s Figure 3 isa fragmentary partialsectional per spective upon the plane 33 in Figure A Figl1l' e 4 is a diametrical viewgof one set.;of forming rollers,

Figure 5 is anenlarged transverse section of Y the transverse advancing means,

Figure 6 is a fragmentary partial sectionallelevation of the aligning fingers acting in association with thetransverse advancing means,

severing means Figure 8 is a fragmentary sectional elevation in the direction of the arrows on line 18 3 in Fig:

.ure 7, a

Figure 9 is a fragmentaryperspective of the guiding and holding means for-the wire entering thedies,

Figure 10 is a longitudinalsection on theline-e= i!) in Figure 2 and-partly in elevation, of the" arching and end bending dies,

Figure 11 isan end elevation on the line i I--Il in Figureglt),

FigurelZ i a longitudinal elevation on the line 12 in Figure 2 and partly in section, of the end inbending dies,

Figure 13 is a sectional" elevation;onthegline l3-J3 in Figure 12,

Figure l4 is an end elevation on the line: MM in Figure 1.2,

Figure 15 is a longitudinal section on ,;t he line, 7

it in Figure Zand partly in elevation,

Figure 16 is a fragmentary plan on i5! 6 in Figure 15,

Figure 17 is a longitudinal sectionon the line H in Figure 2 and partly in elevation, s

Figure 18 isa sectional plan on the line l8-l8 in Figure 17,

Figure 19 is a fragmentary perspectiveof the pin ejection guidingrneans, and;

A round wire from; a coil, upon a convenient turntable not show n, is grippeddrawnforward and formed into desiredcross sectional shape such as, havinga flat opposite ;a conveX-itm or flat,

by a pair of conveniently mounted and; driven forming rollers such as 29 and 25 the iormer hav Figure is a longitudinal section on thelinel in Figurezand partly in elevation of the wire;

the 5 line Figure is a perspectiveof a produced hair accommodate the advancing wire between the discharge of the rollers 20 and 2| and the entrance to parting off and forming dies where the entered wire is gripped and held while a section is severed. The complementary parts of forming dies and cutters are mounted upon a plate 28 secured to the base 29, and the reciprocating plate 36 of a convenient die press arranged to be conveniently operated.

Referring to Figures 7, 8 and 9, in a block 3| on the plate 28 i resiliently supported by a spring 32 a wire guide 33 with upstanding jaws 34 and wire slot 35 through which the wire enters the machine, and at opposite end the plate 30 carries a downwardly tapered aligning peg 36 above an accommodating socket 31 in said block 3|, said peg 36 to engage and move over or keep in alignment the inner and free or leading end of the wire 23.

Above the guide 33 on the plate 30 is a clamping member 38 to grip and hold the wire 23 While semicircular shaped cutters 39 at each end of the dies on plate 30 above co-acting socket 46 sever the wire and trim th opposite end to leave a rounded end 4 l, Figures 7 and 20.

During the holding of the wire by the guide 33 and clamping member 38 the wire which is being fed forward by the rollers 2i and 22 sinuates into and is accommodated in the sinuous path 24, and immediately the wire is released upon the rising of plate 30 the sinuated length straightens out and the end shoots forward into th machine.

The severed length of wire, Figure 7, for a pair of pins is then under the keeper plate 42 consisting of two sections one each secured to opposite side of a jaw housing block 43, Figure 2, secured to the plate 28 and within which is a re cess 44 wherein are a pair of vertically resilient jaws 45 and 46, the former being mounted upon rods 41 with springs 48 thereabout and having a longitudinally or forwardly spaced plurality of transverse recesses 49a, 49b, 49c, 49d, and 49a, to accommodate the wire of a twin blank, and later, a partially formed pair of pins, and a punch passag 50. The lower jaw 46 which has upstanding sides Figure '7, which are spaced sufiiciently to slidably embrace th upper jaw and project forwardly, Figure 2, and slide in the slots 52, have like recesses 52a, 52b, 52c, 52d and end 52e, is mounted upon studs 53, Figure 2, and supported upon springs 54 about said studs, all accommodated in a recess 55 in a reciprocating bar 56 which is reciprocably accommodated in said block 43, and has an upwardly bevelled or ramped rear end 51 where it is connected by a laterally projecting stud 58 at each side to a tension spring 59 which is anchored to a post 60 of a bracket 6| rearwardly extended from the plate 28, a bracket 62 secured to the reciprocating plate 30 and having a cam projection 63 moving said bar 56 and jaw 46 forwardly at each upward movement of said plate 30.

The engagement of tensioned jaws 45 and 46 in addition to the advancement of the partially formed pins being effected hold them so that they will not fall sidewardly.

After the twin blank enters the machin and is in the position shown in Figure '7, th next upward stroke of plate 30 raises the clamping member 38 thus releasing the incoming wire 23, and the sinuated up length thereof in the sinuous track 24 instantly straightens out byshooting forward into the machine and is then under the plate 42 and in the slots 49:: and 52a of the jaws 45 and 46, and said upward stroke of plate 30 operates the advance means which mov the severed wire transversely or laterally forward into recess 4% and 52?), Figures 2, 5 and 10, where it lies between upper and lower dies 64 and 65, the latter having wire stop 66, and between said dies upon the next downstroke of the press the wire will be centrally arched and have trans- Verse kinks or corrugations 61 formed towards each end whereat a slight bend 68 is effected,

and upon release the ends will spring back, all

as in Figure 10.

At next upstroke of the press the partially formed blank will be moved into the next recess 49c and 520 and onto die 69 against stops 69m, Figure 12, so that during the next downstroke of the plate 30 the forwardly disposed pins 10 on die 69 will press the ends down into the die against the shoulders H thereof and cause each end of the blank to be drawn into the position shown.

The next upstroke of the plate 39 will move the blank forward into another recess 49d and 52d and onto die 12 and against stops 73, Figure 15, where during the next downstroke of the plat 36 the punches 14 press its ends down as shown.

As the aligning fingers 15, Figures 1 and 6, depending from the plate 30 descend, they en-' gage the wires thereunder, and any that may not be in exactly correct register with the dies upon which they should be, are moved into that position.

The nearly completed joined pair of pins at next upstroke of the plate 30 are moved forward into next recess 49s by the end 52c, of the jaw 46, Figures 17 and 18, where at next downstroke of said plate the bow end of each pin will be bent down by a punch 16 against the guid 1'! past, and be held down by, a spring latch 18, and the double edged punch 19 with concave opposite edges will sever the pair of pins to leave rounded ends 84, Figure 20, the cutting falling away through passage 8| in the block 43, and as the punches I6 and 19 retire each completed pin 82, Figure 2.0, falls and is directed into passage 83, Figure 2, wherethrough they fall from the machine and are received and collected thereunder or directed by convenient chute elsewhere desired.

Iclaim:

1. In the production of hair pins, the step of moving a length of wire sufficient to form two hair pins severed from that fed from a coil, transversely forward from the path of the incoming wire and successively so advancing it to successive positions at each of which it is successively operated upon to complete production of two separate hair pins.

2. Improved machine for producing hair pins, comprising rollers to form and/or advance a wire from a coil, a sinuous path from. said rollers to a die press to accommodate wire advanced from the rollers while its end is temporarily held, and a die press in which are means for (1) holding an entered length of the wire, (2) severing that length and shaping the ends as desired, (3) retaining the severed length, (4) moving it transversely forward out of the path of incoming wire, (5) successively moving the partially formed blank, and (6) co-acting dies on a plate upon the base and on an upper reciprocating plate of the press, to (a) arch the blank at mid-length, and transversely kink or corrugate it towards each end, bend each end in towards the arch and at each end slightly angle it, (b) to further bend each end towards the arch, (c) to bend each end down upon the arch, and (d) to sever a so formed joined pair of hair pins.

3. Improved machine for producing hair pins, comprising rollers to form and/or or advance a wire from a coil, means to accommodate and control wire advanced from the rollers while its end is temporarily held, and a die press in which are; a wire guide and clamp at the entering end, a die at the inner or leading end to trim the wire end, a die just inwardly of the guide to sever the wire and trim the trailing end, a path to receive and hold the entered and severed length of wire, upper and lower ratchet like jaws working one within the other tensionally and having ratchet like recesses to accommodate transversely positioned wire, and disposed transversely across said jaws, successive lower dies on a plate on the press base, and co-acting dies upon the reciprocating plate of the press, to (a) arch the blank at mid-length, transversely kink or corrugate it towards each end, bend each end in towards the arch and at each end slightly angle it, (b) to further bend each end towards the arch, (c) to bend each end down upon the arch, and (d) to sever a so formed joined pair of pins.

4. In and for machines for production of hair pins of the type having means for accommodating the wire moving forward from forming or feed rollers to a die press while the entered end is temporarily held in said press, a vertically superimposed pair of plates each having a longitudinally spaced plurality of concavities in the edges and positioned in longitudinal relation so that the ends of the concavities in one slightly overlap those in the other and a cover plate across the path providing a straight and also a sinuous path for a fed wire to pass therethrough and to buckle thereinto when its leading end is temporarily held, and from which it may straighten thereout into a machine immediately said end is released.

5. Improved method of producing two hair pins simultaneously from round wire, consisting in reforming the wire by rolling it into a cross sectional shape having a transverse flat and an oppositely disposed convexity, or flat, the reformed wire feeding forward continuously from said rollers, passing the reformed wire through feed accommodating means to a press, therein severing a desired length for two pins, moving said length transversely forward from the path of incoming wire, and during successive strokes of the press successively advancing the length transversely forward and (1) arching it at midlength, corrugating it transversely towards each end and slightly angling each end, (2) bending the upstanding ends inwardly and towards the arched portion, (3) bending said ends down upon the arched portion, and (4) severing the so formed joined pair of pins.

6. Improved method of producing two hair pins simultaneously from round wire, consisting in, reforming the wire by rolling it into a cross sectional shape having a transverse flat and an oppositely disposed convexity, or flat, the reformed wire feeding forward continuously from said rollers, passing the reformed wire through feed accommodating means to a press, therein holding the entered wire, severing a desired length for two pins while the wire fed forward from the feed rollers sinuates into said accommodating means and shoots into the press when the entering end is released, moving the severed length for two pins transversely forward from the path of incoming wire, and during successive strokes of the press successively advancing the length transversely forward and during said strokes (1) arching it at mid-length, corrugating it transversely towards each end, slightly angling each end, (2) bending the upstanding ends towards the arched portion, (3) bending said ends down upon the arched portion, and (4) severing the so formed joined pair of pins.

'7. Improved methodof producing two hair pins simultaneously consisting in, passing wire of requisite cross section through continuously feeding rollers and thence through feed accom- ,modating means to a press, therein severing a portion and (4) severing the so formed pair of pins.

8. Improved method of producing two hair pins simultaneously consisting in, passing wire of requisite cross section through continuously feeding rollers, sinuating the forwardly fed wire between feeding rollers and a press in which the wire is acted upon, intermittently freeing the wire entered in the press and allowing the sinuated part to shoot into the press, holding the so entered wire, severing a-length for two pins, moving the severed length transversely forward from the path of incoming wire, successively moving the length transversely forward, (l) arching the length at mid-length, transversely corrugating it towards each end and slightly angling each end, (2) bending the upstanding ends inwardly and towards the arched portion, (3) bending said ends down upon the arched portion, and (4) severing the so formed joined pairof pins.

ALFRED CARLYLE DAY.

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