US2297426A - Device for the manufacture of zippers - Google Patents

Description

Sept. 29, 1942. NAGELE 2,297,426

DEVICE FOR THE MANUFACTURE OF ZIPPERS Filed Oct. 12; 1939 5 Sheets-Sheet l /nvento/:

firzf/wz ze 5 Sept. 29, 1942 K. F. NAGELE 2,297,426

I DEVICE FOR THE MANUFACTURE OF ZIPPERS Filed Oct. 12, 1959 3 Sheets-Sheet 2 /n ven for:

A5175 Z Mgek Se t, 2, 1942. K. F. NAGELE 2,297,426

DEVICE FOR THE MANUFACTURE OF ZIPPERS Filed Oct. 12, 1939 3 Sheet-SheefS Patented Septa29, 1912 Karl Friedrich Nigele, Berlin-Lichterielde, Ger-' many; vested in the Alien Property Custodian Application October 12, 1939, Serial No. 299,165

7 Claims.

This invention relates to a device for the manufacture of Zippers in which the interengaging closing members provided with the interengaging feet are pressed by rollers upon a roll-shaped cushion of a fabric band.

It is already known to guide a band provided with the closing members by means of two Dressing-on rolls, the axes of which lie parallel to the plane of said members and to press the feet of the said members firmly down upon said roll or cushion. Pressing-0n devices of that type cannot be used, however, for the manufacture of satisfactorily operating Zippers, as the Zippers are not straightener, during the pressingon procedure and they are located upon the roll-shaped cushions in relatively different heights.

In the present improved machine for the manufacture of Zippers spaced pressing-on rolls or disks, the spacing of which corresponds with the thickness of the Zippers, are moved successively in opposite directions longitudinally of the sides of the Zippers and first afiect the heads of the Zippers and align them and then pressthe feet of the same against the pad or cushion, whereafter this rolling procedure is repeated in the ermany November 1, 1938 Figure 11 shows a side-view of the band feedreverse direction. During the forward movement of the rolls the supported roll or cushion serves as an abutment, whereas during the movement in the other direction, a ledge provided beyond the heads serves as an abutment for the Zipper In the accompanying drawings: I Figure 1 shows a Zipper member put loosely upon a fabric-band cushion,-

Figure 2 shows a side-view of a, pressing-on roll,

Figure 3 is an elevation partly in vertical section of the band holder and the pressing-on device.

Figure 4 is a perspective view of a band holder with the pad and Zipper in position,

Figure 5 is a view similar to Fig. 3, the direction of movement as indicated by the arrow being counter to the direction of movement indicated in Fig. 3,

Figure 6 is a vertical longitudinal section partly in elevation through an automatic machine for the manufacture of Zippers,

Figure '7 is a transverse section in the line IX-IX of Fig. 6;

.Figure 8 is a broken side elevation of the band guide members illustrated in Figs. 6 and 7.

Figure 9 is a transverse section in the line dof Fig. 8; v

Figure 10 is a plan of the pressing-on rollers, and a portion of the conveying cylinder;

ing roll;

Figure 12 is a section on the line i2i'2 of Fig. 11,,

Figure 18 is a View similar to Figure 16 showing the pressing-on rolls in eccentric position;

Figure 19 is a front view showing a modification of the forked support of the rolls; Figure 20 is a side view of Figure 19. In Fig. 1 is shown how a Zipper member 1 is pressed against a fabric band 3 and is clamped fast thereon, in that it is subjected to pressure form height of the members in spite of any incidental unequal thickness of the pads, as the pads serve as abutments when the feet are being on three sides, the pressure acting laterally, as

notform obstacles when the pressing-on rolls I, 8 are downwardly moved. The rolls are sup-.'

ported in arms of fork-like member Q-instead of which, however, also a bow-likemember may be employed and they are turnable on pivot bolts supported, in turn, by said arms. The member 8 is secured to a rod which can be reciprocated by suitable means, as more fully dealt with hereinafter. Between the saldarms, above the Zipper member, is a stationary Guide ledge H extending parallel to and slightly spaced from the band. If the upper edges of the holder halves are smooth, the rolls I will be provided with circumferential grooves or ridges I, as in Fig. 2.

-The width of these grooves corresponds with the thickness of the Zipper members I. With this constructional form additional pinions can be dispensed with, but if theupper portions of the band holder are designed as combs, the teeth of which receive the bead of the band and the feet of the Zippers between them. the rolls 1 and 8 may have smooth peripheral surfaces.

The manner of operation when the rolls 1 and 8 are pressed onto the cushion of the band is as follows: v

The holder 5, 6 with the band inserted into it and with two Zipper members arranged upon the band cushion in proper position with respect to one another is moved below the rolls. Placing the Zi per members upon the band cushion may be effected manually or by any suitable auxiliary device. The rolls are spaced in accordance with the transverse thickness of the head of the Zipper members. As the forked member 9 is moved downwardly the'rolls 1 8 first contact with the edges of the Zipper heads, receive the heads between them and straighten and align the Zipper heads accurately vertically between them. These stages of operation are illustrated in the Figs. 13, 14 and 15. In Fig. 13 the rolls 1 and 8 have engaged the head I'- of the Zipper at its sides, then they are moved downwardly so as to press the head I onto the cushion 2,

as in Fig. 14, and to smoothen the sides thereof at the same time, and these operating phases are continued until the rolls have arrived in their lowermost position shown in Fig. 15. The feet of the Zipper members are gradually subjected to the pressure of the rolls and the feet are pressed inwardly firmly upon the bead 2 and at the same time the cushion is held by the band holder 5, 6 which serves as an abutment. Thus the height of the Zipper members relative to the band is perfectly uniform. In order to favor the pressing-in of the band rolls while the pressing-on procedure is going on, at the feet, the upper edges of the holder members 5 and 6 may have notches N (Fig. 4) of a moderate depth so that the cushion is held by the comb-like portions I 4 between said notches, while the feet I can be inserted more deeply into the said notches.

When the holder is arranged stationary below the rolls 1, 8 and the band is pulled only through the gap 4, the notches and the comb-like teeth need be provided only within the range of the rolls 1, 8, as shown in Fig. 5.

After the rolls 1, 8 have rolled in one direction over the sides of the Zipper members whereby. the feet are firmly pressed down, such rolls are moved and rolled over the Zippers in the opposite direction whereby possible springing back of the feet I will be overcome. In order to prevent the members I from being torn off from the cushion when the rolls are moved in the reverse direction, i. e. upwardly, a ledge II is provided which serves as an abutment for the beads I of the members I. As the ro ls are moved twice over the sides or edges of the memor edges are particularly well smoothed which is a highly desirable requisite of the finished Zippers.

According to the invention, it is contemplated to arrange a plurality of pairs of rolls similar to I and 8 in a series and to reduce the width of the gap between the rolls of each pair of rolls gradually so that the pressing-on procedure is subdivided into a corresponding number of stages. This can be attained, however, by employing rolls, the diameter of which increases in a suitable measure in the direction of feed of the band, or by making use of stepped rolls, the diameter of the consecutive steps increasing likewise in the measure suitable for the purpose intended. The gradual pressing-on of the Zipper members with the aid of a plurality of rolls of suitable design is particularly useful if strong Zippers are to be made.

Asshown in Figures 3, 5, 7, l3, l4 and 15, the pressing-on rolls 1 and 8 are solidly supported in the arms of fork 9. In order to adjust the 'free distance of the two rolls 1 and 8 to correspond with any thickness of the Zipper, the two pressing-on rolls 1 and 8 are supported in eccentric manner, with their shafts 1a and 8a in the cylinder pieces 4| and 42, which in turn are rotatably and adjustably supported in the arms of fork 9.

The adjustment of the eccentric pieces 4| and 42 is accomplished with the aid of the manual adjustment 43, whilethe eccentrics 4i and 42 are secured by applying the clamp screws 44. With this arrangement, it is possible to change the distance 45 between the rolls 1 and 8 by simply distorting the eccentrics 4| and 42, as shown, for example, in Figures 16 and 18. The same results may be obtained with the arrangement shown in Figures 19 and 20. This embodiment shows the forked arms 9a and 9b swinging outwardly and held together by a tensioning screw 46. Simple adjustment of this tension screw 46 in one or the other direction, will obviously serve to either increase or decrease the distance 45 between rolls I and 8.

In the Figs. 6-12 is illustrated an automatically operating machine for the manufacture of Zippers according to this invention. 22 (Fig. 6) denotes a part of a frame holding a feed channel 23 filled with Zipper members supplied therein by a known feeding device which does not form a part of this invention. The heads of the Zipper members are directed downwardly. From said magazine themembers pass between two conveying rollers 24, 25 (Fig. 7), their heads being downwardly directed. The rollers 24, 25 are driven with uniform numbers of revolution by the intermediary of cog-wheels 26 and 21, of which 21 is attached to a shaft 29 driven by a motor 28. The rollers 24, 25 are rifled which extend around them only on a part of their circumference so that the Zipper members are further conveyed by the rifles of the rollers only when they are not pressed again-st these latter.

In the constructional form shown in Fig. 6 the conveying members I and B are in direct contact with the rollers 24, 25 directly at one end of the same (the left-hand end in Fig.6). The members 1 and 8 are designed as disks in this example, each disk comprising two steps, of which that step which contacts directly with the rollers, viz. the steps I and 8 (Fig. 10) is remote from [ment of the feet of the Zipper members, whereas the breadth of the other step of the rollers, viz. the steps I and 8', corresponds with the distance'between the gaps of said members. The disks' I and 8 are supported in arms of a forked member 9 which is vertically guided by and lil (Fig. 6) and is subjected to the action. of a helical compression spring' 32, the lower end of which bears upon a disk ill supported by an eccentric disk 33 affixed to the shaft 29. Owing to this arrangement the disks I and 8 are vertically reciprocated when the shaft 29 rotates.

Directly behind the magazine 23 and between these roll halves is cogged and the halves are arranged. at an angle with respect to one another, so that there is left between them a space to receive folds of the band which may eventually arise therein. The toothed rims contact with the cushion 2 and presses it firmly against and between the feet I which are open at the top. Owing to the arrangement that the roll 34 is located immediately behind the magazine the space between it and the end of the conveying rollers 24, 25 can receive a large number of Zipper members which are pressed onto the band cushion. As the band bearing the cushion is clamped fast between the feet. of the Zipper members these latterwill draw the band along with them when they are conveyed by the rollers. Thus, no separate members need be provided for this purpose, but if preferred, special bond guiding and pulling members may be provided.

Behind the roll 34 (Fig. 11) the thin p rtion 8 of the band is guided into a slot or gap 40 (Fig. 9) of a bipartite ledge 36, 31 which extends beyond the disks 1 and 8; At the place where the disks I and 8 move upwardly the ledge 38, 31 are provided with lower lateral recesses 39 (Fig. 8) so that the movement of the disks is not interfered with, and at this place tooth notches 38 are provided, the position of which corresponds with the distance between the members of the Zippers. The operation of these members is the same as has been described with respect to Fig, 4.

The manner of operation of the machine is as follows: Of the Zipper members, between the open'feet of which theband cushion is pressed by means of the pressure roll 34 somewhat loosely at least one thereof (or a plurality thereof if there are more than one pair of rolls 24, 25) is moved at every revolution of the conveying rollers beyond the ends of these rollers. Having reached this point, the disks I, 8 are moved upwardly, straighten the member by the part I and press it firmly upon the cushion, the lower edges of the band guiding members 38', 31 or the tooth gap faces constituting abutments for the feet employed. and it is likewise possible to arrange several pairs of rolls or disks in a series, and finally, it is possible to make also with these machines the distances between .the rolls or disks variable.

Iclaim:

l. A device for manufacturing Zippers designed for operation following the loose application of Zippers to the bead of the supporting band, said device including a pair of pressing rolls mounted for free rotation in a plane at right angles to the length of the band, with said rolls having a fixed spacing corresponding to thethickness of the head of the Zipper, and means for moving the rolls as a unit transverse to the length of the band and over the head and feet of the Zippers on opposite sides of the band, the rolls being movable transversely the band in successively opposite directions relative to the Zipper, and means for guiding the band and loosely applied Zippers to th rolls, said means including a formation to maintain the Zippers in properly applied positions longitudinally of the band during operation of the rolls whereby in the movement of the rolls the Zippers arealigned longitudinally of the band and the feet of the Zippers are pressed in gripping cooperation with the band below the bead.

2. A construction as defined in claim 1 wherein the rolls are supported on pivot bolts carried by the respective arms of a forked member, the pivot bolts being eccentrically mounted and having means to secure such bolts in adjusted posititfii, whereby to vary the spacing between the ro s.

3. A construction as defined in claim 1 wherein the rolls are mounted on pivot bolts carried by the respective arms of a forked member, and wherein clamping screws are provided, extending through slots of the forked arms, with means for securing the screws in desired adjustment.

4. A construction as defined in claim 1 wherein the Zipper members are fed between conveying rolls having rifles, with the pitch of said rifles increasing on a part of the circumference of the rolls, together with a band feeding roll having a bead of the band and forming an abutment to limit the downward movement of the Zipper during the pressing-on operation.

6. A construction as defined in claim 1 including a holder to receive the band and support the of the Zipper members. When the disks l8. 3'!

Zippers during the rolling-on operation, the up per end of therholder immediately underlying the bead of the band and forming. an abutment to-1imit the downward movement of the Zipper during the pressing-on operation, the upper portion of the holder being slotted to receive the feet of the Zippers.

'I. A construction as defined in claim 1 includ ing an abutmentarranged between the rolls and overlying the head of the Zippers, said abutment limiting upward movement of the Zippers in the fixing movement of the rolls in the upward direction.

KARL mmnarcn idiom.

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