US1905504A - Machine for sewing fastener tape and the like - Google Patents

Description

April 25, 1933.

ROSEMAN MACHINE FOR SEWING FASTENER TAPE AND THE LIKE 4 Sheets-Sheet lv Filed April 15, 1931 2 Z INVENTOR V BY w ATTORNEY5 April 25, 1933. ROSEMAN 1,905,504

MACHINE FOR SEWING FASTENER TAPE AND THE LIKE Filed April 15'. 1951 4 Sheets-Sheet 2 ATTORNEYS A ril 25 1933. RQSEMAN 1,905,504

MACHINE FOR SEWING FASTENER TAPE AND THE LIKE I Filed April 15 1951 4 Sheets-Sheet 3 Zia 21a MM ATTORNEYS April 25, 1933. L. RQSEMAN 1,905,504

MACHINE FOR SEWING FASTENER TAPE AND THE LIKE Filed April 15. 1931 4 Sheets-Sheet 4 L 5 VENTOR I ATTORNE Patented A r- 25,193? j 1,905,504

UNITED STATES PATENTMOFFICE TAIE AND THE LIKE Application fl led April 15, 1931. Serial No. 530,170.

This invention relates specifically to a maeye engaging portion and a base portion chine for sewing fastener elements, for exhaving a pair of loops both of which may be ample, eyes or eyelets, upon fastener tape or traversed by bar stitches to provlde a secure other strips of fabric, although the invention attachment of the fastener elements to the 5 may be embodied in machines for sewing tape.

other impenetrable objects upon fabric To accomplish the spreading of the bar strips, garments or the like, or for sewing stitches as above-described, my invention strips containin fastener elements or other further contemplates an auxiliary feed impenetrable ObJBCtS upon the edges of garmechanism for the tape to engage a fastenments, and for like purposes. er' element and ,which' shall move the tape The invention relates in general to a maintermittently in steps shorter than the feedchine such as shown in my Patent No. 1,7 42,- ing steps of the main feed mechanism while 221 dated January 7, 1930, and relates esthe. transverse or bar stitches are being pecially to a machine in which the work, for formed. In the usual sewing machine, the

5 example the fastener tape, is drawn or fed feeding movement of the feed rollers abovethrough sewing mechanism by intermittentdescribed is interrupted during the formaly rotated feed rolls which grip the tape or tion of the transverse'bar stitches, and acthe like between them. cordingly my said auxiliary feed is intended One feature of my invention relates to the to operate to form the transverse stitches sewing of so called transverse or bar stitches while the feed rollers are at rest. over the fastener elements or the like. In A further object is to provide in such a the making of fastener tape, it is customary work feed mechanism, auxiliary feed. mechato provide a longitudinal line of stitching on nism which also temporarily shall move the the tape which is interrupted at each fastenwork independently of and at a greater speed 5 er element to form in continuation thereof than the main work feed mechanism to cause lateral transverse or bar stitches which overa long longitudinal stitch to pass over a porlie some portions of each fastener element. tion of a fastener element. Usually these bar stitches are arranged one Another object is to provide novel and upon the other or at distances apart correimproved work feed mechanism of the char- 30 spending to the length of the normal longiacter described whereby the speed of movetudinal stitches .and are formed by lateral ment of the work is automatically varied at swinging of the needle bar of the sewing madilferenttimes so that stitches of difierent chine simultaneously with its reciprocation. lengths can be produced in a continuous se- One object of my present invention is to ries at different points in the work, as may 5 provide in a sewing machine novel and imbe desired.

proved means for causing these bar stitches Other objects are to provide novel and to be spaced or spread out over the-fastener improved auxiliary feed mechanism for element at distances less than the length of moving the tape during the formation of the the normal longitudinal stitches so as to bar stitches, said mechanism to be arranged avoid the formation of protuberances or unat the work discharge side of the needle; to usual thickness in the tape and also to proprovide a machine of the character described vide a more secure attachment of the fastenwhich shall be reliable and durable, and at er element to the tape. This feature is parthe same time relatively simple in constructicularly advantageous in fastener tape tion and operation; and to obtain other adwherein the fastener elements are in the vantages and results as will be brought out form of eyelets which "admit of the bar by the following description.

. stitches being applied at only a limited por- Referring to the accompanying drawings tion of theircircumference which is in strikin which corresponding and like parts are ing contrast to the ordinary type of fastendesignated throughout the several views by 10 er elements which usually include a hook or the same reference characters,

Figure 1 is a front elevation of a sewing machine embodying my invention.

Figure 2 is a rear elevation thereof.

Figure 3 is an elevation of the end thereof on which is mounted the needle mechanism.

Figure 4 is an enlarged fragmentary elevation of the stop device and auxiliary feed mechanism illustrated in Figure 3, with portions broken away and shown in section.

Figure 5 is a plan view of the parts shown in Figure 4, showing one step in the sewing operation.

Figure 6 is a similar view showing the step during which the transverse bar stitches are formed.

Figure 7 is a like view showing a succeedin step.

%igure 8 is "a composite perspective View of the auxiliary feed dog parts, and

Figure 9 is a schematic end elevation of the driving mechanism for the feed rollers.

For the purpose of illustrating the princi ples of my invention, I have shown it in connection with a known type of sewing machine which includes a base A, a standard B and a goose-neck C. The machine has the usual drive shaft D to be driven by a belt passing over a pulley E on the drive shaft. At the free end of the goose-neck C is mounted a needle bar F which is reciprocated in the usual manner from the drive shaft D. The needle bar is also mounted in a bracket arm G to oscillate simultaneously with its IT iprocation. For oscillating the bracket G, I have shown a cam wheel H mounted on a counter-shaft I journaled in the standard B and driven through worm and worm wheel gearing K from the drive shaft D. The cam H has cam projections h to engage a follower roller L carried by a lever M pivoted to the goose-neck C at N and connected by a link 0 to the bracket G. The roller L is held in engagement with the cam H by a tension spring P. The needle bar F carries a needle Q, which is threaded and cooperates with a bobbin in known manner. All of the above-described details of construction are old in the art, some thereof being shown b my Patent No. 1,742,221 dated January 1930.

The work to be operated upon, for example, the fastener tape, is passed beneath the needle Q to provide in the work a line of stitching as the needle is actuated. In the present instance the work is in the form of a fastener tape R of known construction including a plurality of thicknesses r of fabric in one of which is'secured a row of eyelets S substantially equidistantly spaced longitudinally of the strip. The purpose of my machine is to sew these eyelets upon the tape by a longitudinal line {of stitches 1 which is interrupted at each of the eyelets and has in continuation thereof a plurality of transverse bar stitches 2 overlying a portion of each of the eyelets. The tape R is passed through a guide 3 secured to the bed A of the machine and which also serves as a presser' foot, the guide directing the tape in proper relation to the needle Q as clearly shown in Figures 1, 4 and 5.

For feeding the tape longitudinally past the needle Q I utilize a pair of feed rollers 4 and 5 one of which is mounted on a shaft 6 journaled in a fixed bracket 7 on the bed of the machine and at the rear side of the needle, that is, at the side of the needle from which the work leaves. The other roller 4 is mounted on a spindle 8 journaled in a bearing block 9 vertically slidable in a bracket 10 secured to the bed of the machine. These rollers 4 and 5 grip the fastener tape or other work between them, and the roller 4 is yieldingly forced toward the roller 5 to cause a gripping pressure of the rollers upon the tape, by a compression spring 11 interposed between the bearing block 9 and one end of a lever 12 which is pivotally mounted intermediate its ends at 13 on the bracket 10.

The rollers 4 and 5 are driven from the drive shaft D of the machine, and as shown, the shaft 8 of the roller 4 is connected by a universal coupling 14 to a'sha-ft 15 journaled in a standard 16 on the base A of the machine. The coupling 14 permits movements of the spindle 8 with respect to the shaft 15. The shafts 15 and 6 are geared together by gears 17 and 18, the first of which is mounted on the shaft 15, and the shaft 15 has another gear 19 which meshes with a drive gear 20 mounted on a shaft 21 journaled in the standard 16. A pinion 22 on the shaft 21 meshes with a pinion 23 on another shaft 24 upon which is also mounted a gear 25 which meshes with a pinion 26 on a stub-shaft 27 all journaledin' a frame 160. The shaft 27 has mounted thereon a pin- Wheel 28 with which meshes a suitably shaped worm 29 carried by a shaft 30 journaled in a bearing frame 31 which is mounted on the drive shaft D to swing concentrically therewith as shown in Figures 6 and 7 of my Patent No. 1,742,221. The shaft 30 carries a beveled inion 32 which meshes with a second beve ed pinion 33 on the drive shaft D. The bearing frame 31 has a lateralarm 34 which carries a follower roller 35 arranged in a cam race 36 in a Wheel 37 mounted on the counter shaft I at the rear side of the machine.

With this construction the feed rollers 4 and 5 are driven through the worm and pin- wheel 29 and 28 so as to feed the tape with an intermittent or step'by step I motion, each step being equal to the length of the desired stitch, which, in cooperation with the sewing mechanism causes a longitudinal line of stitches to be formed in the work as it is fed by the feed rollers. As

a fastener element or eyelet S'approaches the path of descent of the needle, the cam race 36 and the follower roller 35 swing the bearin frame 31 to disengage the worm 29 5 from t e pin-wheel 28 so as to stop the feed rollers 4 and 5. Thereupon, the cam H os-' cillates the needle bar to form the transverse bar stitches 2. To prevent overthrow of the feed rollers when the worm 29 is disconnected from the pin-wheel 28, the arm 34 has a stop awl 38 which enters between two of the teet of the pin-wheel. This drive mechanism and the o eration thereof is generally illustrated and described in my above mentioned Patent No. 1,742,221,- with the exception of the gears 20 and 22. The purpose of these ears is to permit changing of the speed 0? the feed rollers 4'and 5 by substituting gears 21 having diiferent numbers of teeth.

The feed rollers 4 and 5 are of such diameter and they move at such a speed. that they can move the tape a small distance, for example, one-sixty-fourth of an inch, greater than the distance between the fastener elements, to provide a slight latitude for adjustment of the tape about to be described. To ensure proper presentation of the eyelets to the needle so as to avoid the possibility of the needle striking an eyelet and thereby becoming broken, I utilize with the feed rollers 4 and 5 a stop device to interrupt movement of the tape, in combination with means for diminishing or relieving the gripping pressure of the feed rollers upon the tape while the stop device is holding the tape against movement by the feed rollers. This stop device is in principle described and claimed in my Patent No. 1,605,902 dated November 2, 1926, but my present form of stop device differs from the patented device in details of construction. The present stop device includes a stop foot 39 mounted on the end of a rod 40 vertically slidable in the end of the goose-neck C of the sewing machine which carries theneedle bar F. This stop foot has a stop pin 41 adjustably mounted thereon by screws 42 pass ing through aslot 43. The diameter of the stop pin 41 is considerably less than the diameter of the eyelets S as clearly shown" in Figure 4 of the drawings. The stop pin is normally influenced toward the tape by a compression spring 44 adjustedby a thumb screw 45, and slidable upon the rod 40 is a sleeve 46 which engages a collar 47 rigidly secured on the rod 40 to raise the stop pin from the tape. This raising of the stop pin is accomplished by engagement of one end of a link 48 with a lug 49 projecting from the sleeve 44, the other end of said link being pivotally' connected to a crank 50 on the shaft 51 mounted under the bed B of the machine. Upon this shaft 51 is another 1 crank 52 to which is connected by a link 53 a lever 54 pivotally mounted at one end.

upon the'bed of the machine at 55.: The

lever 54 at the other end has a roller 56 held by a tension spring 58 in engagement with a cam 57 which is mounted on the shaft I. With this construction, the stop pin 41 is alternately raised and lowered from and into contact with the tape, and the movement of the stop pin is so related to the movement of the tape by the feed rollers 4 and 5 that the stop pin enters one eyelet upon each descent of the stop pin to the tape. The distances between the eyelets vary sllghtly due to inaccuracies in inserting the eyelets, and slight irregularities in the feed of the tape by" the feed rollers also occur,

60 which traverses the leading side of the eyelet (see Figure 5).

As the result of this action, should the space between the eyelet engaged by the stop pin and the eyelet. approaching the needle, for example, be shorter than the normal distance, the stop; pin will stop movement of the tape by the feed rollers 4 and 5,

i. e., the stop pin will oppose the tendency of the rollers'to pull the tape. Accordingly it will be impossible for the eyelet approaching the needle to move to a point in the path of the needle so as to cause breakage thereof. If the space between the eyeletengaged by the stop pin and-the eyelet approaching the needle is longer than normal, the stop pin will not be engaged by the rear edge of the eyelet so soon and therefore will not hold back the tape, at least notfor so long a period as when the space is too short. The same action takes. place should the feed of the tape by the feed rollers become irregular, and therefore any lack of uniformity in the spacing of the eyelets or in the feeding of the tape is compensated or adjusted as each eyelet reaches the stop device. It will be observed that the stop device is at the rear side of the needle and engages the tape after the latter has been stitched, while in my above-mentioned Patent No. 1,605,902 the stop device is in front of the needle.

'The present construction is more satisfactory in that the tape is stronger after having been stitched and is 'more capable of withstanding tension between the stop device and the feed rollers.

Means is provided for reducing the gri ping pressure of the feed rollers upon tl ie and screw device tape while the tape is held back by the stop device, with the rollers at the same time maintaining a sufiicient grip upon the tape to keep the tape under tension. This means is shown as including the lever 12, the end of which opposite the end engaged by the spring 11 is hingedly connected to the link 48 which raises the stop foot rod 40, and is claimed in my copending application Serial No. 530,171 filed April 15, 1931.

When the stop foot 39 is in its upper position, the link 48 holds the lever 12 so as to cause a maximum pressure by the spring 11 upon the roller 4, and thereby create a maximum gripping pressure of the feed rollers upon the tape. As the stop foot is permitted to descend by the cam 57 through the link 48, the lever 12 is permitted to swing about its pivot so as to reduce or relieve the compression of the spring 11 so that the gripping pressure of the rollers on the tape 1s relieved or reduced. The pressure exerted by the spring 11 can be adjusted by the, nut

61, or by screw 75 in Figure 2, or by adjusting sleeves 46 in Figure 3. When the normal pressure is correct, the reduced pressure may be adjusted by the screw 75 and sleeve 46; adjustment by screw 61 changes both pressures.

When each fastener element has approached a point with respect to the needle Q, preparatory to making the first stitch 60 which traverses the fastener element, an auxiliary feed device disposed at the work discharge side of the needle is brought into operation to engage an stitched and move the tape independently of the feed rollers 4 and 5' which have been temporarily stopped by disengagement of the worm 29 from the pin-wheel 28. This auxiliary feed device includes a dog 64 pivotally mounted at 65 on a slide bar 66 and having a tooth 67 to enter, each eyelet S. This dog 64 is normally influenced toward the tape by a leaf spring'68 and has a curved surface 69 receding from the tooth to ride backwardly over the tape.

The slide bar 66 is reciprocated by a lever 70 pivotally mounted intermediate its ends at 71 on the bed of the machine and having a pin and slot connection 72 with the slide bar. The other end of the lever 70 carries a roller 73 .which follows a cam 74 mounted on the shaft I. The roller is held in engagement with the cam by a spring 74. This cam has a cam surface 75 which swings the lever 70 to move the feed Ldog toward the needle, and another cam surface 76 to move the feed dog in the opposite direction. These cam surfaces are so related to the movement of the tape and the stop .device, that while the stop pin is disengaged from the tape, the dog 64 is moved toward the needle so as to drop under the influence of the spring 68 into the eyelet next preceding traverse the fastener element.

eyelet already that leaving the stop device, as clearly" shown in Figures 4 and 5 of the drawings.

The cam surface 76 then starts the feed dog away from the needle so as to permit the needle to form the stitch 60. which traverses the leading edge of the fastener element. The cam H then begins to oscillate the needle bar to form the transverse bar stitches 2, and simultaneously a plurality of stepped cam surfaces 77 on the camv 74 engage the roller 73 so as to continue movement of the feed dog with a step-by-step movement and thereby cause the transverse bar stitches to be spaced apart as clearly shown in Figure 6.

As the rear edge of the fastener element approaches the path of the needle, the oscillation of the needle bar is stopped, and the dog is moved to accelerate movement of the tape so that a long stitch 100 is made to Thereupon, movement of the feed rollers 4 and 5 is resumed, and the longitudinal line of stitches between the eyelet just stitched and the next succeeding eyelet is produced. At this time the cam surface 75 returns the feed dog 64 to its starting position. It will thus be observed that the bar stitches 2 are arranged side by side so as not to form an undesirable protuberance on the tape, and that the bar stitches cover a large area of the eyelets to provide'a secure attachment of the eyelets to the tape;

Preferably, the feed dog 64 is adjustable to compensate for different spacing of the fastener elements on different pieces of work. As shown, the slide bar 66 is formed in two superposed relatively longitudinally slidable sections 66a and 66b adjustably connected by a slot and screw connection 660. The pin of the pin and slot connection 72 is carried by the upper section 66b. By loosening the screw 660, the two sections 66a and 66b may he slid relatively to each other to move the dog with respect to the pin and slot connection 72 so that the dog may be brought into proper cooperative relation to the fastener elements.

While I have shown and described the invention as specifically used for sewing eyelets upon fastener tape, and as embodied in certain details of construction, it should be understood that this is primarily for the purpose of illustrating the principles of the invention and that the machine is suscep tible to use for other urposes and may be embodied in many di erent details of construction without departing from the spirit or scope of the invention.

Having thus described my invention, what I claim is:

1. In a sewing machine for sewing fastener elements on work, a sewing mechanism including a needle, means at the work discharge side of said needle for feeding work to the needle witha step-b -step motion to form a line of stitches, an auxiliar work advancing means between said nee le and said work feeding means including a membar to eng e the fastener elements which have been stitched and move the work from the needle at a different rate than said work feeding mechanism.

2. In a sewing machine for sewmg fastener elements on work, a sewing mechanism including a' needle, means at the work discharge side of said needle for feeding work to the needle with a step-by-step motion to form a line of stitches, and auxiliary work advancing means between .said needle and said work feeding means including a reciprocable dog to engage the fastener elements upon movement in one directlon and slip over the fastener elements upon movement in the opposite direction so as to move the work from saidneedle at a difierent rate than said work-feeding mechanism.

3. In a sewing machine for sewing fastener elements on work, sewing mechanism including a reciprocable and oscillatory needle, means for feeding. the work relatively to said needle to form a line of stitches between said fastener elements, automatic means to interrupt the operation of said work feeding means and consequently movement of said work thereby as each fastener element approaches the path of said needle, means for simultaneously recipro eating and oscillating said needle while movement of the work by said work feed ing means is arrested to form transverse stitches overportions of said fastener elements, and auxiliary work advancing means at the work dischar e side of said needle including a reciproca fle feed dog to engage each of said fastener elements which have been previously stitched to the work, and means for reciprocating said reciprocable feed dog to engage one of said fastener elements and move the work while said needle is oscillating to form said transverse stitches over another fastener element, so that said transverse stitches are spaced from 'each other.

4. In a sewing machine for sewing fastener elements on work, sewing mechanism in cluding a reciprocable and oscillatory needle, means for feeding the work relatively to said needle to form a line of stitches between not said fastener elements, automatic means to interrupt the operation of said ork feeding means and consequentl moyement of said work thereby as each astener element approaches the path of said needle, means or simultaneously reciprocating and oscillating said needle while movement of the work by said work feeding means is arrested to formtransverse stitches over portions of said fastener elements, and. auxiliary work advancing means including a feed dog to engage one of said fastener elements and tener elements on work, a sewing mechanism 7 includin a needle, means at the work discharge side of said needle for feeding work to the needle with a step-by-step motion to form a line of stitches, a periodically operated stop deviceto temporarily engage said fastener elements for controllin presentation thereof to said needle as t e work is moved, and auxiliary work advancing means between said needle and said work feeding means including a member to enga e a fastener element which has been stitc ed and move the work from the needle at a different rate than said work feeding mechanism.

6. In a sewing machine for sewing fastener elements on work, "a sewin mechanism' includin a needle, means at t e work discharge s1de of said needle for feeding work to the needle with a step-by-step motion to form a line of stitches, a reciprocable slide, a dog pivoted on said slide to engage the fastener elements upon movement in one direction and ride over said fastener elements upon movement in the other direction,t a cam, and an operative connection between said cam and said slide to reciprocate the slide and move the work away from said needle at a different rate than said work feeding mechanism.

7. In a sewing machine for sewing fastener elements on work, sewing mechanism including a reciprocable and oscillatory needle, means for feeding the work relatively to said needle to form a line of stitches between said fastener elements, automatic means to interrupt the operation 'of said work feeding means and consequently movedirection and ride over said fastener ele- .ments upon movement 1n the other d1rection, a cam, and an operative connectionv between said cam" and said slide to reciprocate the slide and move the work away from said needle at a different rate than said workv feeding mechanism so that said dog successively engages said fastener elements to move the work step-by-step while said needle is oscillating to form said transverse stitches,

whereby said transverse stitches are spaced from each other.

8. The combination set forth in claim 1 with the addition of means for adjusting said member to compensate for different spacing of the fastener elements on diiferent.

pieces of work.

9. The combination set forth in claim 2 with the addition of means for ad'usting said reciprocable do to compensate or different spacing of t e fastener elements on different pieces of work.

10. The combination set forth in claim 6 with the addition of means for adjusting said dog on said slide to compensate for difierent spacing of the fastener elements on different pieces of work.

11. In 'a sewing machine, sewing mechanism including a reciprocable and oscillatory needle, means for feeding work relatively to said needle to form a line of stitches, automatic means to periodically interrupt the operation of said work feeding means and consequently movement of the work thereby, means for simultaneously reciprocating and oscillatin said needle to form transverse stitches w ile movement of the work by said work feeding means is arrested, auxiliary work advancmg means for moving the work to space said transverse stitches, and means for actuating said auxiliary work advancing means step-by-step while said work feedingmeans is at rest.

EO ROSEMAN.

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