US2291725A - Anchor setting mechanism - Google Patents

Description

Au'g- 4, 1942- c R. JOHNSON ETAL 2,291,725

ANCHOR SETTING MECHANISM Filed Aug. 23, 1940 v 3 Shets-Sheet 1 fi/erzrau 2 7077226027 g. 19 2- v C.R;JQHNSON Em 2,2 1,72

ANCHOR SETTING MECHANISM Filed Aug. 23, 1940 3 Sheets-Sheet 2' "22mm f/ma a? M g- 4, 2- c. R. JOHNSON ET AL ANCHOR SETTING MECHANISM Filed Aug. 23, I940 3 Sheets-Sheet 3 5i Ihdenid:

Patented Aug. 4, 1 942 ANcnon SETTING MECHANISM harles Russell Johnson, Glen Mills, and William Penn-Gaskill Hall, Berwyn, Pa., assignors to E. L du Pont de Nemours & Company, Wilmington, DeL, a corporation of Delaware v Application August 23, 1940, Serial No. 353,910

14 Claims.

This invention relates to an anchor setting mechanism for the purpose of setting and anchoring tufts of bristles into brush blanks or other articles.

Objects of the invention include the provision of an anchor setting mechanism which is compact and made up as a single integral unit; the provision of a unitary bristle tuft and anchor setting device which is adapted to reciprocate as a whole in the setting of the tufts and anchors instead of being divided between a stationary anchor wire feeding and cutting device and a i'eciprocable setting guide ortube in which the tuft is doubled, so that a more compact unit can be utilized, and so that the impact and consequent jarring heretofore unavoidable between the reciprocating and stationary parts of the mechanism is now obviated; the provision of a new and improved unitary anchor setting device in which the anchor wire feeding and cutting means is reciprocable therewith as distinguished from the stationary prior art wire feeding and cutting devices; the provision of a unitary anchor setting mechanism in which the setting needle may slightly compress the tuft of bristles prior to doubling of the tuft and cutting of the anchor wire so that the tuft and anchor. are positively held and positioned for the cutting of the 'anchor and doubling of the tuft; the provision of an anchor wire feeding tube and nozzle which is movable with relation to the main body of the mechanism to allow for the above stated compression of the bristle tuft; and the provision of a new and improved device for brush tuft anchor setting, which is more compact, eflicient in operation, and more positive in the anchor wire cutting and tuft doubling operations than has heretofore been possible.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings, in which Fig. 1 is a plan view of the improved anchor setting mechanism with parts broken away;

Fig. 2 isa side elevation of the same, looking in the direction of arrow 2 in Fig. 1;

of one die-part, looking in the direction of anrow 8 in Fig, 7;

Fig. 9 is a side view of the interior of the other die-part, looking in the direction of arrow 9 in Fig. 'l;

Fig. 10 is a cross section on line ill-l0 of Fig. 8; Fig. 11 is a cross section on line ll-Il of Fi .8: r Fig. 12- is a side elevation of the anchor cutter and cutter bar;

Fig. 13 is a bottom plan yiew of the anchor cutter and cutter bar, looking in the direction of arrow IS in Fig. 12; and

Fig. 14 is a side elevation of the anchor cutter. In the prior art, it has always been thought necessary to make the'anchor setting mechanism in bristling machines in two distinct parts,

one of which was stationary and included the needle guide and wire. feeding and cutting means; and a part below the stationary part which was reciprocable and included, the anchor guide or tube inwhich the tufts are doubled and through which the tufts and anchors are driven in the setting thereof in the article to be bristled. In the prior art, the reciprocable part was arranged to rise and strike the stationary part to receive the tuft and its anchor; then the anchor guide would descend to position the tuft while the needle, descending also, would double the tuft in the guide and insert the same in the brush. These actions are illustrated in Figs. 72-74 of Patent vNo. 1,846,141, dated February 23, 1932. Such a device is sometimes found to be objectionable in that the reciprocating anchorguide continuously strikes and jars the stationary wire feeding device and cutting die, and in time the anchor guide tends to become dislodged with respect to the stationary part of the device suficiently to prevent smooth operation of the needle through its guide and through the anchor and tuft guide; and in some Fig. 3 is a rear elevation, looking in the direction of arrow 3 in Fig.1;

Fig. 4 is a section on the line 4-4 of Fig. 1; Fig. 5 is an enlarged side elevation of the die; Fig. 6 is a top plan of the die, looking in the the direction of arrow 6 in Fig. 5;

Fig. '7 is a front elevation of the die looking in the direction of arrow 1 in Fig. 6;

Fig. 8 is a partial side view of the interior side cases the parts may even become offset sothat the needle can not enter the anchor guide at all, I

resulting in failure of the machine and in breakage of the needle.

The present invention contemplates avoidin the difficulties of the prior art by placing the entire anchor setting mechanism in one compact reciprocable unit, so that the wire feeding and cutting devices will reciprocate as one, and the passage through the anchor and tuft guide,be-

ing immovable with relation to the needle guide and the anchor wire feed, will necessarily always be in alinement therewith so that the needle can do its work properly at all times.

Referring first to Fig, 2, there is shown a brush 10 into which the doubled tufts l2, each tuft having a wire anchor, are to be inserted. The

. tufts are as usual doubled in the anchor guide and are forced by the needle l4 down through the guide which terminates in a nozzle IS. The nozzle l6 must obviously reciprocate to come down adjacent the brush III to hold the tuft in doubled condition while the needle 14 inserts the same in the brush. Then the nozzle mustretreat to clear the just inserted tuft so that the brushmay be moved to a position wherein the next doubled tuft may be inserted. The needle 14 is operated in timed relation to the movement of the device by a mechanism not shown.

A rigid tube I8 is clamped in a split ring 20 which is drawn together by the bolt 22 located .on the body 24 of the anchor mechanism. The

tube I8 is reciprocated in timed relation to the needle to vertically reciprocate the attached anchor setting mechanism. Ring 20 has connected thereto a smaller annular guide 26 which reciprocates on a stationary rod 28 to prevent any possible turning of the anchor mechanism about th tube 18 as a center.

Centrally of the tube 18 and below the end of the same, the body 24 is provided with a die composed of two parts 30 and 3|, having an interior needle passage 32 therebetween which communicates with a passage 34 in the nozzle [6. Passage 34 tapers as shown so as to provide for doubling the bristle tufts. Adjacent th die,

there will be positioned a bristle picker-{notshown, which automatically inserts a tuft of bristles thru entrance 33 in die-part 3l, relative to tapered passage 34 on the up stroke of the mechanism, see Fig. '1. In descending, the needle will double the tuft in this passag and continuing thru the passage will extend from the end of the nozzle I to insert the double tuft into the brush. Both passages 32 and 34 are provided with hard metal inserts 35 to positively guide the needle edges and to prevent wear of the die-parts, and the latter are provided with locating pins 35'.

I Extending laterally of the body 24, there is an integral platform 36 to which is bolted a plate 38 rotatably mounting a free roll 40 on a shaft 4| in a sunken depression 42. A second plate 44 is also bolted to the extension 36 and these two plates form therebetween a guideway 46 for the feeding reception of anchor wire 48 which travels in the directionof the arrow in Fig. 1. Plate 44 mounts a feed roll 50 which is adapted to be intermittently rotated by means of the rotatable ratchet 52 connected to the feed roll 50 by a shaft 54. The shaft 54 extends thru the ratchet assembly again rises after having set one tuft and anchor.

Adjacent the forward end of the extension plate 38, there is locateda support 68 secured to the body 24 of the anchor assembly. Relatively heavy bearing 62 are located in this support,

and located in the bearings; there is a metal tube 64 secured in assembled relation by a nut 85, and which extends from the adjacent end of the guldeway 48 through the bearings 62 and is curved as shown in Fig. 1 to form a nozzle-like uide for leading the wire 48 to a position in the die 30, 3|, through an interior guideway 66 in the tube.

A screw 88 is set into the ring directly above the tube 54 and a spring 10 is hooked over the screw and the tube so that when the needle descends to compress the tuft in the die, the anprovided with a'relatively large bore 14 (see Fig.

4) in which a sleeve15 is positioned by set screws 18. A cylindrical plug 80 i mounted to reciprocate in the sleeve 16 and a cutter bar 82 is fixed in this plug by screws 84. The cutter bar 82 ex-v tends forwardly from the plug 80 and thru an opening 85 in the body 24 and thru a guide 86 in the die-part 30, slightly to one side of the passage 32, as indicatedin Fig. 1. Atthe forward end of the cutter bar, there is provided a cutting member 81 attached to the bar by fiat head screws, as shown in Figs. 12 and 13, and the cutting member has an edge in the form of an inverted U at 88, thru which the anchor wire is fed and which is adapted to sever the anchor wire to the correct length for a tuft anchor. Cutter bar 82 and member 81 are providedwith locating pins 88'.

Referring to Fig, 8, there is shown a shear plate 89 and a cover plate 89' which are screwed into the interior face of die-part 30 and are spaced just enough to provide a guide for the needle edge in its reciprocation thru the die,

from the insert 35 in passage 32.to the like insert in passage 34. Thus the needle will be positively guided throughout its reciprocation. The plates 89 and 89' form a side wall of guide 85 for the cutter bar, and the cutting member 81 and the feed roll and is journaled at its upper ratchet at the appropriate instant. This pawl is not shown as it may be of conventional design.

'Of course, on the down strokeof the anchor assembly, the pawl remains behind in its sta-' tionary position and is not again actuated to turn the feed rolls until such time as th anchor is adapted to reciprocate against the plates, so

that the edge 88 will reciprocate past and in contact with the edge of the shear plate 89 to thus shear off th anchors from the wire 48; Hence, it will be seen that the wire is advanced thru its guide 86 which enters the slot 12, thru the cutter 88, past and between the plates, and into the insert 35 in the passage 34 in die-part 3|, and when sheared ofi, the anchor will be guided in the inserts 35 in passage 34, all the way to the end of the nozzle I8. Also, the cut anchor cannot retreat from its position in the insert 35, since the narrow opening at 88 in. the cutter, having passed the edge of the shear plate, after the cut, there is no way for the anchor to escape, as the member 81 will be in the way.

A relatively heavy coil spring 98 is positioned in the sleeve 18 between the plug and shoulders '92 formed on the body 24 by the cutter bar opening 85, so that the spring continually urges f the plug and attached cutter bar 82 to the left stationary part of the machine not shown and is actuated in such timed relation that it will impinge on the impact plunger 94 when the assembly is in raised position and immediately after the compression of the bristle tuft by the needle. Incidentally, die-part 3I is provided with a rest I02 for the undoubled tufts, as shown in Fig. 9. 1

In the operation of the device, the wire 40 is fed off a reel, not shown, thru the guides 40 and 06 by the feed rolls 40, 50 to the die 30, 3|. The actuation of the feed 'rolls takes place immediately after the positioning of the undoubled tuft in the entrance 33 in the die, and just before the impingement of the needle on the anchor wire and the bristle to compress the'latter. The bar I00 then strikes the plunger 94 to urge the cutter against the action of spring 90 to sever the wire, thus forming the anchor. All of these operations occur in the order named when the anchor assembly is in its raised position. The wire being cut, the anchor assembly starts to descend, and the needle I4 descends faster than the assembly to double the tuft about the severed anchor in the tapered passageway 34 and to force the tuft and the anchor down thru the passage so that the tuft I2 is set into the brush I0 at the lowermost position of the anchor assembly. As soon as the tuft is set, the anchor assembly retreats vertically from the brush and.

the needle also moves vertically but faster than the anchorassembly. when the needle is again in its position above the die, the operation as above explained is repeated, the brush I0 having been moved during the up stroke of the assembly and the needle, to a new position for the next tuft.

It will be seen from the above, that the present invention provides a compact unitary and simple anchor setting assembly which avoids the defects of the prior art; and it is clear that the passage 34 in the nozzle I6 cannot become offset from the passage 32 or from the reciprocable path of the needle I4. Further, the continual jarring due to the impact between the movable tuftdoubling tube or nozzle and the stationary wire feeding and cutting devices of the prior art is completely avoided.

Having thus described our invention and the advantages thereof, we do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what we claim is:

1. In an anchor setting mechanism, a support adapted to be movable to and from an-article to be set, an anchor wire feed means and an anchor wire cutting means on said support and movable therewith as a unit, anchor guidemeans adapted to lead a severed anchor to the article, anchor driving means adapted to reciprocate in said anchor guide, said anchor wire cutting means comprising a shear plate having a slot, said feed means being adapted to feedsaid wire thru said slot, the latter forming a guide to prevent lateral displacement of the anchor.

2. In an apparatus of the class described, an

anchor setting mechanism including a'setting needle, an anchor wire feeding means, and a wire cutting means, said mechanism being adapted to receive a tuft of bristles and said wire feeding means being located so as to position the wire immediately above said tuft, said needle beingconstructed and arranged to engage said anchor wire and compress said tuft just prior to the actuation of said wire cutting means, whereby said tuft and wire are lield,in desired position during the cutting of the wire to form an anchor.

3. In a unitary anchor setting mechanism, a

' reciprocal support adapted to approach an article to be bristled to set an anchor and to retreat therefrom preparatory to setting a further anchor, a needle, means located on the support to form the anchors, and comprising an anchor wire feeding device, a wire guide, and an anchor cutter, said wire guide being movable with respect to said support, said wire feeding means and said cutter being adapted to be operated at a predetermined point in the advance of the needle towards setting position whereby it may engage the wire just prior to the severing operation of the anchor cutter.

4. An apparatus as rectifiedin claim 2 in which the wire feeding means is movably mounted so that it may be displaced by saidneedle during the tuft compressing action. of the latter.

5. In 'an anchor setting mechanism, a support,

. an anchor wire feeding device resiliently mounted for movement relative to said support, an anchor wire cutter, and a setting needle adaptedto displace and hold said anchor wire'during the cutting operation of said anchor wire cutter.

6. 'In an anchor setting mechanism, a supp rt, a die on said support, a wire feeding device to lead a wire to said die, said device being resiliently mounted, said die being adapted to receive a tuft of bristles adjacent said feedingdevice in the normal position thereof, a setting needle adapted to engage and depress said wire against said tuft to compress the latter, and a wire cutter actuable to sever the wires to form an anchor when said needle engages the wire and compresses the tuft.

7. In an apparatus of the class described, a unitary anchor setting assembly including a reciprocal needle, an anchor forming means, said a means comprising a wire feed device, a guideway for said wire, and a wire cutter, said guideway being mounted so as to be movable in the direction of movementof theneedle, and means 'to normally maintain the same in position, but allowing displacement thereof.

8.. In an anchor die,-a guideway for the reception of a cutter bar, a shear plate forming at least part of a wall of the guideway, means to receive an anchor wire adjacent said shear plate, a cutter on said cutter bar to cooperate with said a shear plate to sever an anchor, and means to guide the severed anchor, said shear plate being effective to prevent lateral displacement of the wire and anchors severed therefrom.

9. In an anchor die, a needle passage, a cutter guideway, a cutter in said guideway comprising a member having an edged slot, means to feed a wire through said slot, a shear plate adapted to cooperate with said slot to shear an anchor, and a guide for said anchor in said needle guide, said shear plate being located between said needle passage and said cutter, said shear plate and said anchor guide preventing lateral displacement of,

said anchor. 10. In an apparatus of the class-described, a

reciprocable support, anchor wire feeding and forming means, a reciprocating needle, a tuft entrance, a tuft receiving chamber below said entrance, said anchor wire feed means being positioned to feed the wire across said chamber and above the bottom thereof, whereby an anchor may beformed above a tuft in said chamber while said tuft is held thereon.

11. In a bristling machine, an anchor setting mechanism comprising a support, a needle mounted in said support for reciprocal action to set anchors in a blank, a guideway for said needle in said support, anchor wire feeding means adapted to feed the wire into said guideway trans versely thereof and intermediate its ends, and anchor severing means effective to cut the wire substantially at a side of the needle guide, whereby an anchor having a length not exceeding one transverse dimension of the needle guideway is formed in the latter in the path of the needle.

12. In a bristling machine, an anchor setting mechanism comprising a reciprocating support, a guideway in said support for a setting needle,

mounting said anchor wire guide means for anchorwire feed means adapted to feed wire directly into said guideway, a portion of said guideway at one side thereof defining a stop for the free end of the wire, an anchor cutting device adapted to cut anchors from said wire at a side of said guideway opposite from said first-named side, and an anchor setting needle arranged in said guideway to set anchors, whereby said anchors are of a length substantially equal to a side to side dimension of said guideway and are guided therein by their ends.

13. In an anchor setting mechanism, an anchor die.mounted to reciprocate to and from anchor setting position, a needle reciprocally mounted in said anchor die, anchor wire guide means effective to lead wire into the path of said needle, anchor cutting means in said die, and means movement relative to said die in the direction of needle reciprocation, whereby said cutting means is operative to cut anchors irrespective of movement of the wire by the needle.

14. In an anchor setting mechanism, the combination of an anchor die mounted to reciprocate to and from anchor setting position, a needle in said die adapted for reciprocation relative thereto but parallel to the die movement, and an anchor severing device mounted on the die; with anchor wire feed means, a guide for the wire, and means mounting said guide for movement relative to said die in a direction parallel to the needle movement.

CHARIES RUSSELL JOHNSON. WILLIAM PENN-GASHLL HALL.

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