US2734670A

US2734670A - Sewing machine loop shaper attachment

Info

Publication number: US2734670A
Authority: US
Publication date: 1956-02-14
Anticipated expiration: 1973-02-14

Description

Feb. 14, 1956 A. GELLMAN ETAL 2,734,670

SEWING MACHINE LOOP SHAPER ATTACHMENT Filed Nov. 16, 1951 2 Sheets-Sheet l Asian/MM GELLMHN SIDNEY DIESEIV HA us INVENTORJ' Feb. 14, 1956 A. GELLMAN ETAL 2,734,670

SEWING MACHINE Loop SHAPE-R ATTACHMENT 2 Sheets-Sheet 2 Filed Nov. 16, 1951 06/24 110m GELLMA/Y SIDNEY D/EsErw/Aw;

United States Patent f 2,734,570 Loor' SHAPER Abraham Gunman, New ar, and Sidney Diesenh'aus,

Monsey, N. Y. v Apbii'eation November '16, 1951,8iial 1%; 256,757) 2 Claims. c1. nap-116 This invention relates to aloop' shaper preparatory to placing the" loop' on a folded hem of a parachute or other goods surface requiring a loop for uni'form'aflixation thereto of a' retaining loop.

It is an object of the present invention to provide alloop sha'per on which a loop of strap material" can be made preparatory to the placing of the same upon the hem and in position for a stitching operation to secure the loopto the hem. 4

It is another object of the invention to provide a'device on which a loop strap can-be applied to shape the loop and wherein by thesame' device the strap can be placed on the hem in the proper location and the side ends of the strap properly aligned to the desired angle as indicated by' the shape of the bottom plate and whereby'all loops will-be applied in a uniform'manner and of uniform shape upon the hem of a pa'rachuteor on a preselected surface portion of other goods requiring aflixation of retaining loops so that all loops are alike in size and are evenly distributed:

It is another object of the invention to provide aloop forming device on which the loop will be shaped and placed by means of the device upon the hem or object to be applied and wherein the device is so constructed that an Opening int'liefoot of the sewing machine serves as a 'guid'e'forapplying the device with the loop thereon" upon the hem or surface. Theheel of the claw also serves to hold the loop in place and the arms of the foothold the arms of the strap when the foot or claw of the sewing machine is brought down. The device is withdrawn or removed from the loop and arms of the strap prior to the beginning of the stitching operation as will hereinafter appear.

It is another object of the invention to provide on a loop forming and applying device a centering guide memher which is adjustable relative to the base plate part of the device and adapted to enter between the claws or arms of the sewing machine foot so that the sewing machine foot acts as a guide when using this device to properly locate the loop upon the hem and for the beginning of the stitching operation and wherein the loop will be properly and automatically located on the hem in the proper position to receive the stitching needle when the device has been taken away.

Other objects of the invention are to provide a loop forming device having the above objects in mind, which is of simple construction, inexpensive to manufacture, has a minimum number of parts, adjustable, compact and eflicient in operation.

For a better understanding of the invention, reference may be had to the following detailed description taken in connection with the accompanying drawings, in which:

Fig. 1 is a perspective view of the loop forming device embodying the features of the present invention;

Fig. 2 is a collective and perspective view of the several parts of the device;

Fig. 3 is a longitudinal sectional view of the device taken on line 3-3 of Fig. 1;

. 2 'Fig. 4is a'perspee'tive view of the strap from which the loop is'made;

Fig.- 5 is a-perspective' view of the device and of the strapb'eing applied to the device;

Fig; 6 is a pers'pectiv'eview of the device and" of the hem ofapaiachute orother device to which the loop'is'to be applied and with illustration made of the foot, or claw, of the sewing machine in place over the loop to hold" it while" tli'e device is" pulled rearwardly, whereby to permit thestitl'iing operation to be efiected upon thekstrapj Fig; 7 is atop plan view of the loop already stitched and applied tothehem of the parachute'or other device.

Referring now to the figures, 10 represents a base'mem; ber havingwing portions 11' and 12 with inclined edges 13 and 14 respectively. Extending forwardly from tlie wing portions" is atapered projection 15 over which the st'rap'16' from which the loop is made is folded. This strap 16* is'extended alon'gone edge of the one wing portion to a's'su'methe" angle thereof and is brought around, as shown in 5, to shape the loop and thereafter the other end ofthe' strap is brought along the inclined edge of the other wing portion,- in a manner as shown in Fig. 6'. The strap 16

hasinc'line'dend edges

17 and 18 which will extend parallel to hem 19"0f a parachute 20 or other surface of any other device requiring retaining loops.

The rearend of the bottom plate 10' is bent upwardly at 21' to"provide a handle in' which there is disposed at singlefin er' opening 22 that can be used in the manner as illustrated in Fi 6.

Fixed to the bottom" plate" 10 by means of screws 23 and z risa transversely extendin block piece 25 having a large tliread'ed hor'zd and two" smaller threaded holes 27 and 28'ori"th""re'spective' opposite ends thereof.

A spring'fin r 32; exthds und'er the" blockpiece 25 and within a groove 29 on the bottom thereof and is held a screw 31 within the large hole 26. This spring fin'ger'32' extends outwardly'over the bottom plate and ontothe'taperedportiori 15' at the'e'nd thereof. The

screws

23 and 24 respectively enter

holes

27 and 28 to hold the block piece iii place'. Holes'3'4" and 33 are providedin the bottomplate to receive the

screws

23 and 24, Fig. 2; 7

Along angiepiece's's is rested over the block 25' and its vertical edge has a recess 36 to permit the spring finger 32 to pass outwardly thereunder. This angle piece 35 carries an adjustable pointed guide member 41 and has a transversely extending portion 42 with overlying spaced horizontal portions 43 and 44 having respectively elongated slots 45 and 46.

Screws

47 and 48 respectively extend through the slots for connection with the respective threaded

holes

37 and 38 in the angle piece 35.

Screws 51 and 52 having respectively washers 53 and 54, extend downwardly respectively through

elongated slots

39 and 40 of the angle piece 35 and into holes 55 and 56 of the block piece 25.

It will thus be seen that longitudinal adjustment of the guide member 41 along the finger spring 32 can be effected by loosening the screws 51 and 52 and pulling the angle piece 35 forwardly or pushing it rearwardly. The guide member 41 can be adjusted laterally on the angle piece 35 by loosening

screws

47 and 48 and sliding the same along the top face of the angle piece 35.

In operation, the strap 16 is Wrapped about the tapered end 15 of the bottom plate in a manner as shown in Figs. 5 and 6. The strap sides will be brought into alignment with the inclined edges 13 and 14 of bottom plate 10, to be given the proper angle and to give the proper shape to the loop which is being formed. The device with the strap thereon is then placed on the hem 19, as shown in Fig. 6 beneath the sewing machine so that claw or foot 58 with separated claw portions angled apart receives the pointed guide member 11. The opening in foot 58 may have a diflerent shape to accommodate reception of member 11 of difierent shape. Since the folded loop strap is temporarily retained by the finger 32, the claw portions will lie outside both of the spring finger 32 and the guide member 41 when the claw is brought down to bear directly on the loop. By pulling the device outwardly while foot 58 is down on the loop which is aligned with the hem 19, the stitching operation can be started with needle 59. The initial stitching on loop 61 is indicated at 64 Fig. 7, and will continue downwardly along the sides and ends of the strap so as to fix the strap to the hem. The loop portion of the strap which has been formed is indicated at 61 in Fig. 7.

Since the claw 58 is set to receive the spring finger 32 and the pointed guide member 41, the strap will always be properly positioned relative to the claw and in proper alignment with the needle 59. By being able to adjust the guide member 41 rearwardly and forwardly, the folded portion of the loop strap can be properly located beyond the edge of the hem, providing the rear of the claw is aligned with the hem edge. By adjusting the guide member 51 laterally the proper starting point for the needle on the strap can be found. It will be seen that once the adjustment is made of the device, the use of the same when applied to the claw automatically properly locates the loop strap in place under the claw. By an easy withdrawal of the device the loop is held and retained upon the hem by the claw until the sewing operation starts. The claw thus also functions to pull ofi the formed looped strap from the device.

It will thus be apparent that the loop strap can be easily formed upon the device and then thereafter the device taken and put into the proper location upon the hem whereby the sewing machine claw or foot can be brought down over the looped strap to hold it so that the device can thereafter be pulled outwardly and leave the loop. The loops can accordingly be made up quickly and also the stitching can be effected with accuracy and with the sides inclined at the proper angle so that a uniform loop is made upon the hem each time.

While various changes may be made in the detail construction, it shall be understood that such changes shall be within the spirit and scope of the appended claims.

What is claimed is:

1. A loop forming device on which loops can be formed prior to the placing of the same in position on a hem, comprising a bottom plate having wing portions and oppositely inclined edges and a tapered portion extending forwardly of the wing portions, a spring finger extending longitudinally of the plate and its end lying over the tapered portion, means for securing the spring finger to the bottom plate, said spring finger securing means including a transversely extending block piece secured to the bottom plate, an angle piece connected to the bottom piece for transverse adjustment relative thereto, a pointed guide member adapted for guiding engagement with a sewing machine claw and extending outwardly over the spring finger, said pointed guide member being adjustably connected to the angle piece for longitudinal adjustment thereof with respect to said angle piece, said angle piecebeing adjustably connected to the block piece for transverse adjustment along the bottom plate.

2. A loop forming device on which loops can be formed prior to the placing of the same in position on a hem, comprising a bottom plate having wing portions and oppositely inclined edges and a tapered portion extending forwardly of the wing portions, a spring finger extending longitudinally of the plate and its end lying over the tapered portion, means for securing the spring finger to the bottom plate, said spring finger securing means including a transversely extending block piece secured to the bottom plate, an angle piece connected to the block piece for transverse adjustment relative thereto, a pointed guide member adapted for guiding engagement with a sewing machine claw and extending outwardly over the spring finger, said angle piece being adjustably connected to the block piece for longitudinal adjustment along the bottom plate and said pointed guide member being adjustably connected to the angle piece, and said angle piece having longitudinally extending parallel slots and screws extending through the slots and into the block piece and said pointed guide member having spaced horizontal portions with longitudinal slots therein and screws extending into the longitudinal slots and into the angle piece.

References Cited in the file of this patent UNITED STATES PATENTS 533,792 Donovan Feb. 5, 1895 FOREIGN PATENTS 8,401 Australia July 25, 1932