US3490397A - Hair-inserting apparatus - Google Patents

Description

Jan. 20, 1970 A. KLASS.ERT 3,490,397

HAIR-INSERTING APPARATUS Filed Jan. 16, 1968 4 Sheets-Sheet 1 Fig.7

Jan. 20, 1970 A. KLASSERT HAIR-iNSERTING APPARATUS 4 Sheets-Sheet 2 Filed Jan. 16 1968 Jan. 20, 1970 A. KLASSERT HAIR-INSERTING APPARATUS Filed Jan. 16, 1968 4 Sheets-Sheet 5 Jan.- 20, 1970 KLASSERT 3,490,397

HAIR-INSERTING APPARATUS Filed Jan. 16, 1968 4 Sheets-Sheet 4 Fig.7

United States Patent O 3,490,397 HAlR-INSERTING APPARATUS Aloys Klassert, Frankfurt am Main, Germany, assignor to Walter Ul-rich, Kalberau, Germany Filed Jan. 16, 1968, Ser. No. 698,173 Claims priority, applicafiim G6grmany, Jan. 18, 1967,

3,4 Int. Cl. Dc /00 US. Cl. 112-795 5 Claims ABSTRACT OF THE DISCLOSURE Hair of different lengths is inserted in workpieces such as doll-heads by using a rotating pull-out disc with groups of circumferential notches ending inwardly at different rotary paths, whereby each of said groups cooperates with a separate cutting means.

This invention relates to a method and a device for forming and cutting elongated loops of filaments or hair lengths.

The invention is particularly suitable in combination with chain-stitch sewing machines used for inserting hair into doll-heads, wigs, plastic caps and the like, whereby the filaments or hair lengths are pulled out to loops by means of a rotating disc and where said loops are cut by a knife.

It is known to use chain-stitch sewing machines for inserting hair into workpieces and doll-heads whereby a modified chain-stitch (crochet stitch) is employed. Said modified chain-stitch is distinguished from the conventional simple chain-stitch as follows: The thread disposed on the upper side of a base fabric is drawn out to a loop of increased length by means of a disc provided at the machine, and said loop is then severed by cutting means cooperating with said disc. In the known machines, a separate pull-out disc is required for every length of the hair. By adjusting the angular position of the disc and using a variable speed drive, the number of the pull-out discs can be reduced to a reasonable figure, e.g., to four discs for filament lengths of 2 to 22 cm. Doll-heads made in this manner have, however, hair of uniform length over the entire head because it is not possible to work successively with hair of different lengths. In order to avoid open areas showing the base fabric, a uniformly dense hair cover is necessary. This, in turn, results, particularly if longer hair is used, in accumulation of excessive hair material on the head, and said excess has to be cut out again by means of an Evilier scissors in order to be able to apply a hair-do. This requires additional time and labor and results in the loss of artificial hair.

It is, therefore, a principal object of the invention to provide a method and device for pulling out lengths of hair by means of an element which allows the insertion of hair of different lengths in workpieces.

Other objects and advantages will be apparent from a consideration of the specification and claims.

According to the invention, the problem is solved by having the disc at one revolution pull out loops of different lengths in a predetermined succession. The short lengths of hair then serve to cover the base fabric of skin of the doll-head, the longer lengths are used for the hair-do.

It has been found that the following successions of the hair lengths are of particular advantage: long, short, long, short; long, long, short, long; long, short, short, long; long, medium short, long, medium short. Of course, any other schedule can be applied.

A device suitable for carrying out the method of the invention comprises a rotating pull-out disc which is pro- 3,490,397 Patented Jan. 20, 1970 "ice vided with circumferential slots of different lengths whereby the pull-out ends of said slots are situated at different rotary paths and each group of slots cooperates with its own cutting means.

It is of advantage to give those slots, which are intended for the shorter hair lengths and end further inside the disc, an arcuate form which ensures that the threads passing therethrough are kept under tension.

The invention is further explained in the following description with reference to the accompanying drawings which disclose preferred embodiments of a suitable device and in which FIG. 1 is a top plan view of a pull-out disc provided with four slots for alternating long and short hair lengths, in the pull-out position for the long hair lengths;

F LG IZ is a top plan view of the disc of FIG. 1 showing the pull-out of the short lengths;

FIG. 3 is a section taken along line III--III of FIG. 2;

FIGS. 4-6 are diagrammatic illustrations, showing a base fabric with chain-stitching of various successions of different hair lengths, and

FIG. 7 is a diagrammatic front elevation of a hairinserting sewing machine with a thread-tensioning device.

Referring first to FIGS. 1 and 2 of the drawings, there is shown a pull-out disc 1 with four pull-out elements for regularly alternating the insertion of long and short lengths of filaments. The disc 1 is mounted below a flange 2 {by means of screws 3 for adjustable displacement in slots 4, and is rotated in the direction of the arrow by shaft 5. Four slots 6 and 6' for passage of the needle are provided in the disc 1. At their rear ends, the needle slots 6 form inward extensions 7 for long hair and the needle slots 6- form extensions 8 for short hair. A radial arm 11 is secured to the hollow shaft 10 and carries at its outer end knife-holding means 12, secured thereto by a screw 13. Pressed into said holding means 12 are two guide bolts 14 and 14' in which a knife 15 is urged against the disc 1 by two compression springs 16. A second knife holding means 19 is screwed to an arm 17 which has a slot 18 for adjusting its position with respect to arm 11. Holding means 19 guides in two guide bolts 20, 20' (FIG. 3) a cutting means 15 which is urged against the disc 1 by compression springs 16. The knife 15 is arranged in the rotary path of the long hair slot extensions 7 whose pull-out end is designated 9. The slots 8 laterally extending from the needle passage slots 6 are so arranged that they begin at a certain angle straight inwardly and then form for a certain length an arc to their end 9'. Said angle is smaller than that formed by the slot extensions 7. The arcs are so formed as to tension the filament loops at their passage and to ensure the correct insertion of the loops by a looper into the hooks of the needles. The knife blade 15' cooperates with said arcuate slot extensions 8. The end of said arcuate extensions is so arranged as to produce the desired length of the filaments and to prevent the knife 15 from engaging the filaments to the long loops.

In regular intervals, long and short filaments, e.g., synthetic textile filaments, are drawn out by the pull-out disc and cut. Of course, it is also possible to use differently arranged pull-out discs, e.g., a disc having three slots 7 for long hair and only one slot 8 for short hair, or vice versa so that the filaments are drawn out in the sequence long, long, long, short, or short, short, short, long. By turning the disc in the support 2 and securing it with screws 3 in another position, the lengths of the obtained hair can be modified. If, e.g., the longest hair lengths in the slots 7 were 215 mm. and in slots 8 were mm., turning the disc 1 in a direction opposite the direction of rotation, hair lengths of mm. and 60 mm. can be produced in slots 7 and 8, respectively.

It is not necessary to limit the number of slots in a disc to four. By Way of example, FIG. 6 shows a succession of three different lengths; long 40, medium 41 and short 42. In this case, the pull-out disc must have three slots of dilierent lengths and three cooperating knives. By comparison, FIG. 4 shows two lengths; long 40 and short 42 and FIG. 5 also shows two lengths arranged in a pattern of long 40, long 40 and short 42. t

In conventional pull-out discs with slots of uniform length for hair of uniform length, no thread tension is required for normally curled hair. However, for hair of difierent lengths, a slight tension is necessary to obtain proper engagement of the thread in the hook of the needle. A suitable device for this operation is shown in FIG. 7. At the head of a machine 30, there is fixed an angular rod 31; at one leg of said rod, fiat bar-s32 and 33 are provided which carry round cross bars '34 and 35. The spools 36 are placed on pins 37 of the machine table. The thread passes from the spool 36 througlra hole 38 in the angular rod over the cross bars 34 and 35 to the looper 39. The, tension in the thread can be adjusted by displacing the bars 34 and 35 more or less in the direction of the arrows.

I claim:

1. In a device for inserting hair-like threads in a pattern of difiering lengths into a workpiece, in combination with a sewing machine, a rotatable disc having at least two dilferent groups of circumferential slots for reception of a needle and thread loops, said slots terminating into extensions directed inwardly at an angle to said slots, the extensions of at least one group of said slots ending in a rotary path other than the extensions of at least one other group, and plurality of cutting means corresponding to the number of said different groups, one of said cutting means being positioned for cutting the threads pulled out by each of said groups whereby upon one complete revolution of said disc, hair-like threads of diflering lengths are inserted into said workpiece.

2. A device as claimed in claim 1 wherein the slot extensions for the shorter hair lengths are arcuate so as to maintain the thread loops pulled out therethrough under constant tension.

3. A device as claimed in claim 1 comprising a support for said cutting means and means to adjust the position of said cutting means on said support.

4. A device as claimed in claim 1 comprising a shaft for said disc and means securing said disc rotatably to said shaft.

5. A device as claimed in claim 1 including a thread tensioning device comprising adjustable guide means adjustable in the plane of inserting the thread into the workpiece.

References Cited UNITED STATES PATENTS 2,780,190 2/ 1957 Lenoble 11279.5 2,812,734 11/1957 Richards 1l279.5 2,977,906 4/ 1961 Follender 112-795 3,225,724 12/ 1965 Klassert 1 124l0 FOREIGN PATENTS 958,293 5/1964 Great Britain.

H. HAMPTON HUNTER, Primary Examiner

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