DE2057784A1 - Sewing needle and sewing method - Google Patents

Description

Sh 1698

Applies to Edge Carpets Ltd., Kidderminster / England

Sewing needle and sewing method

The invention relates to a sewing needle and a sewing method, in particular for sewing a staple fiber mat, which preferably consists of two component fibers with an arbitrary (random) fiber distribution in the mat.

The invention is based on a sewing machine needle 1 a straight shaft, one end of which is designed to be held in the machine, and the at least one jaw which is open in the direction of the tip of the shaft facing away from the fastening end.

The invention is based on the object of a to train such a needle so that in particular at the beginning mentioned intended use the risk of needle brews significantly reduced 1st. Furthermore, the needle according to the invention should be well suited to be used in such staple fiber mats Tufted and / or patterned colors to be marked.

The ffadal. 1st-.Im wonent high thereby ^ femiiKe lehne t, jlaß _di.e. cheek. '</oJ.Ls daily urine "in the middle of the ma χ 1 ~ paint cross-sections of the remaining iichaffcboi'eiuhö :? lie ^ fc.

An inventive ⁵ day gladly ¹ »a ^! / erf their?; i! m WMiiti eln ^ ro f -i ^^^ 'nüit'i assisted ^ dar I η j- ^f ldV> iin ^ neeni t;! iv * ufihn ^ lei dux-ίϊη * liij J ¹ "; · c L · -Λ.."> ■ · - 'i: VMR Vok .ri IU-MH Rh --m ^ i ■ f i.-ifil- ^ i ■ / ■ .:.? 'u-

BATH ORIGINAL

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A further embodiment of the mowing erfindungsgeraäßeri ■■ ■■ ·; ■; ^"~ By proceeding is that the needles mentioned .- ,: a mat of randomly oriented staple fibers back r be punctured that the jaws of the needles a few. . ·: Insert the pasers of a first paser layer into or through the exposed surface of a second paser ply: r ,; ■ or pass through, which are in flat contact;. " ^ is located with the first layer, with this inserted * - ■ -.- ■ th or passed passers in the vicinity of the through- ■ -. the needle tips step through the surface of the. second layer.

Some embodiments of the invention are shown in FIG Drawing illustrates. Show it " · >:

PIg. 1 to 5 side views and front views of five Äusführuhgsbelpsleleh a girl according to the invention (Partial representation of the tip and the attachment end); -

Pig. 6 and 7 Schemadarteileunp-eri to explain the use of the needles according to Pig. ¹ and 1 I for the production of mats with a tufted and / or pattern effect.

The Ln PIg. The needle IO illustrated in 1 contains a straight shaft 11 with a uniform round cross-section. This shaft sits in an ibgokröpften Frida tü-n Iv "1;' for-t, which dlonts to hold the maggot L on a back and forth b /, '</. up and down movable element of a conventional mower. t in Ouernchnltt fiber oJrvm kfV'ol:> turnp fÜ "> τ · π1 ^ ίί Ah ;; ■ huh. ί; Μ '-, - ΐι "tn -:> fii ot.wa Z- / lindr I ::.-Hi? Π ¹ P-! II ^! F. \ Ιϋ ^: ' rs: 1r '. :: - ·, · ''] ■ ' ^f i 1 i !:

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Length than the other, the apex of the notch either lies in a central plane of the shaft 11 or is offset in the radial direction with respect to this central plane. An embodiment of the latter type is shown in FIG. It differs from the needle according to Figure 1, also in the fact that instead of the frusto-conical portion 13 and the cylindrical part a of decreasing cross-section with continuous curvature part is I ¹ J of the needle according to Fig.l provided 2k, in which the jaws 26 the notch are formed.

The use of the needles described above is illustrated in FIG. 6, for example. The needles 10 are with their cranked end pieces 12 between the back and forth movable parts 60, 61 of a conventional sewing machine attached. When the needle shafts 11 move through the thickness of a fiber mat 62, these needles take hold through their large-area jaws 16 a considerable number of fibers 63 together and lead them through the general plane of the Underside of the mat 62 through, so that a tuft-like product is formed. This effect becomes essential according to the invention Achieved easier than when a number of needles with small jaws through about the same path in succession the mat passes when the mat is moved from one needle position to the other. By the construction of the invention Needles, the stresses of the needle forces are kept low and reliable operation guaranteed with a low number of needle breaks.

In the embodiment of Fig.3, ^ and 5 possessed 'The needles 30, ^ O or 50 have a shaft 31, H.l or 51 with a sharp auxiliary shaft 37, ^ 7 or 57, which is a smaller one Has cross-section than the main shaft and extends forward beyond jaws 36, Ί6 and 56, which are towards the needle tip are open. In the execution game of the F3r! «3 the Shank- 30 one with. a or V-fc5nni.r <* n Kerbo- vorehnne, shoulder,

108823 / t69P

formed by two symmetrical jaws 16, the apex of this notch 34 in the median plane of the Shaft lies. The auxiliary shaft 37 protrudes from the bottom of the Notch 34 and protrudes beyond the end of the jaws 36. This needle can be made from two parts, including a tipped core part of circular Full cross-section through the bore of a cylindrical sleeve part is inserted through, this sleeve part in its end face near the needle tip that mentioned Has notch in the shape of a symmetrical V.

In the embodiment of Figure 4 has to the Tip 47 adjacent end portion 44 of the shaft 40 of circular Cross-section has a reduced, triangular cross-section. In the area of each edge 48 (corresponding to the Tips of the triangular cross-section) are formed - lying approximately in a common plane - jaws 46, which protrude laterally opposite the edges 48, but still within the imaginary extension of the cylindrical circumference of the shaft 40 lie.

The needle according to Figure 5 is similar to that in Figure 4. at In the embodiment according to FIG. 4, however, the jaws touch in the area of the embodiment with a reduced cross-section Part 54. The shaft 57, which is even further reduced in diameter, is designed as a separate core! is inserted into a tubular sleeve (as in Figure 3).

The use of the needles of FJfV 3 bin ^f j is in Fip ,. ^7, for example, using the needle 40 (according to FIG. 4). The needles 40 with their aLr.ckWpften end pieces 4? between the trilnnn 70, 71 which can move back and forth; their stroke is such a ^ eiA hurries, '' .ι / ⁵ , dr ^ m, if the ": <doln through rij <> first and second over f. inaijierlying

BATH ORIGINAL

Layer 72, 73 of different colors are passed through, the jaws 46 seize the fibers from the first layer 72 and lead them out in the vicinity of or (as shown) out of the exposed surface of the second layer 73. The emergence of the auxiliary shafts Mj from the second layer reduces the tendency of the pasers of the second layer to cover the piers of the first layer. According to this method, a certain mottling effect can be obtained in the exposed surface of the second layer.

A preferred field of application of the invention is the sewing of thermoplastic two-component fiber before their heat treatment in the manufacture of flooring. However, the invention can be applied very generally to Manufacture of textile goods use.

1098 ^ 3/1696

Claims (10)

Claims 1.) Sewing machine needle with a straight shaft, the ^v - ^/ one end of which is designed for mounting in the machine and which has at least one jaw which is open in the direction of the tip of the shaft facing away from the fastening end, characterized in that the jaw lies completely within the maximum cross section of the rest of the shaft area. 2.) Needle according to claim 1, characterized in that the foot of the jaw lies in a region of the needle shaft, which has a smaller cross-section than that part of the shaft which extends from said area extends to the attachment point of the shaft. 3.) Needle according to claim 2, characterized in that a number of lying approximately in a common plane, laterally offset jaws is provided. ¹ I.) Needle according to claim 3, characterized in that a notch is provided in one end face of the needle tip, through which two jaws are formed. 5.) Needle according to claim 3 or k, characterized in that the part of the needle shaft which is designed with a reduced cross section and containing the jaw has a circular cross section. 6.) Needle according to claim 1, characterized in that the needle tip is formed by a pointed auxiliary needle shaft which has a smaller cross section than that part of the shaft in which the foot of the jaw is located, and that the auxiliary shaft in the axial direction over "'that-' EHtYe the cheek protrudes. 109823/1696 7.) Needle according to claim 6, characterized in that the Shank from the foot of some in symmetrical Position of the laterally arranged jaws protrudes. ■ Ti 8.) Needle according to claim 7, characterized in that the The foot of the jaws lies in the region of the edges of a part of the needle shaft with a triangular cross-section, with the jaws protrude laterally over this shaft part. 9.) Method for sewing a staple fiber mat, thereby characterized in that needles according to any one of the preceding claims so through a mat of arbitrary aligned staple fibers are pierced so that the jaws of the needles some of the fibers from the main plane of the mat surface in the vicinity of the penetration points move the needle tips out through the surface so that tufts of fibers are formed. 10.) 'A method for sewing a staple fiber mat, characterized in that needles according to claim 5 so by a Mat of randomly oriented staple fibers are pierced through that the jaws of the needles some introduce the fibers of a first fiber layer into or through the exposed surface of a second fiber layer or pass through, which is in extensive contact with the first layer, these being introduced or fibers passed through in the vicinity of the penetration points of the needle tips are through the surface of the second layer. BATH ORIGINAL Blank page