DE2408687A1 - INSULATED SPLICE AND CONNECTION AND METHOD FOR ITS MANUFACTURING - Google Patents

Description

PATENT AGENCY OFFICE T.EDTKE - BuHLINO - K.NNE 2408687

TEL. (089) 53 9653-56 TELEX: 524 845 tipat CABLE ADDRESS: Garmaniapatsnt Munich

8000 Munich 2

Bavariaring 4 February 22nd 1974

P.O. Box 202403

B 5858

General Staple Company, Inc. New York, USA

Insulated splice and connector and method of making it.

The invention relates to insulated electrical connection members, a continuously feedable composite strip for forming the insulated electrical connection members and. a method of making isolated electrical Connection organs and insulated connections from such continuously feedable strips.

A machine for producing connecting members or splices for a pair of wires is already known O

* (US-PS 3,636,611) ',' which electrically and mechanically interrelate

are to be connected. This machine works with continuous

III / 12

rather feeding of flat electrically conductive material (i.e. a wire supply) and feeds, forms, feeds and folds the splices around the pair of wires to be joined into one fully automatic cycle. For this purpose, this machine has a device for feeding in a suitable length from the supply spool, one. Means for cutting off the appropriate length, means for bending the cut Length in the shape of an inverted U by a temporary inserted anvil, and means for conveying the now suitably formed length into a suitably formed generally U-shaped upsetting die, in which previously the ends of the two wires to be joined by the splice so formed.

This machine represents a significant improvement over the prior art of splicing wire by a process that requires the prior manufacture of preformed connecting organs (such as a supply of ordinary preformed staples) and the use of a separate machine to move the preformed staples into a Upsetting die around the wires to be connected requires

The machine described above actually has a considerable simplification and cost reduction in the Creation of a splice for the mechanical and electrical connection of a pair of electrical conductors. It however, it is desirable for many applications and appears

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times necessary that the one formed between the pair of conductors Splice is electrically isolated and / or sealed so that it is tight against moisture and other contaminants. It should be noted that in the typical application of the previously described machine for connecting a pair of wires which have a bare part of which the insulation Stripped off, the attachment of an electrical splice around the bare parts of the wires was of course the desired brings about electrical and mechanical connections, but both the metallic splice thus formed as well as areas of the bare sections of the two wires exposed to the atmosphere.

It is also a co-directional machine for forming a connection and securing the Connection to a conductor known (US-PS 3 6o5 261). These Machine works with continuous feeding of a long strip or flat wire and forms in an automatic or semi-automatic cycle the connector and clamps it on the conductor. The machine has a facility for feeding the long strip, a device for forming the connection from the strip, including a device to form an opening in the first sections of the strip, means for severing second portions from the remainder of the strip, each severed second portion forms a blank, a device for bending a section of the blank in an approximately U-shape around an anvil,

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a device for conveying the knot into a die and means for clamping the approximately U-shaped portion of the bent blank onto a previously in the die introduced head.

As in the case of the splicing process described above, it is desirable and effective in many applications sometimes necessary that the. Section of the terminal attached to the conductor electrically insulated and / or sealed is.

Heretofore, efforts have been made to use the machines described above, or indeed any machine, to manufacture an isolated splice or isolated connection from a roll with continuous feed in vain.

According to the invention, a continuous composite strip is used in the manufacture of insulated splices ■ or insulated Terminals used, which has a long layer of permanently deformable electrically conductive material, the a shape it has been brought into, and a long layer of electrically non-conductive material that is attached to a surface of the layer of conductive material.

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After .Jem inventive method for production insulated splices or terminals is fed the continuous composite strip, a predetermined length cut from it and the cut portion folded to form an insulated splice or joint.

In the machine according to the invention, a die is used used to form insulated splices or connectors that have a body portion with a generally U-shaped receptacle and means for heating the body portion owns.

The invention is explained in more detail below with reference to schematic drawings and exemplary embodiments.

Figs. 1 to 1E show perspective views of a Section of composite strips used in the splice or connection according to the invention,

Fig. 2 shows a perspective partial section to illustrate the way in which a predetermined length of the composite strip of FIG. 1 from the remaining part with a known one Machine (U.S. Patent 3,636,611) is disconnected;

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Figure 3 illustrates the manner in which a severed length of composite strip is formed into the desired inverted U shape with that of the prior art Machine is bent;

Figure 4 illustrates the manner in which the appropriately shaped length of the composite strip in a folding anvil of the machine according to the invention is driven;

Fig. 5 shows a sectional view of an insulated splice according to the invention, which is on a pair conductor connected by it is applied;

Fig. 6 shows a perspective view of an insulated splice according to the invention along the line 6-6 in Figure 5;

7 and 7A show perspective views of alternative embodiments of the one according to the invention Spleisz used composite strip;

Figure 8 is a sectional view of an insulated strip formed from the composite strip of Figure 7 applied to a pair of conductors connected by it;
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9 shows a perspective view of a folding die animal machine according to the invention;

10 to 12 A show perspective views of further Embodiments of a composite strip for the splice according to the invention;

Figure 13 shows a composite strip for making insulated terminals for conductors; and

Figure 14 illustrates a machine for forming that used in the splice of the present invention Composite strip and to form splices from this composite strip.

In Fig. 1 is a composite feed strip 10 for the inventive Spleisz shown. This composite strip 10 has an elongated layer 12 of electrically non-conductive Material having a first predetermined width indicated by the reference numeral 15. If given out later Reasons the only essential feature of the layer 12 is that it comprises an electrically non-conductive material that can be deformed into a preselected shape, that's the one Material forming layer 12 is preferably heat fusible (i.e., it can be at a predetermined softening temperature softened and made to flow). Heat fusible plastic films such as polyamide are within the scope of the invention

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(Nylon tape), polyester, polyolefin, polyvinyl chloride, polyethylene, Neoprene, rubber or copolymers of the materials listed above that have the desired properties for melting or let it flow * when a predetermined temperature has been achieved. The non-conductive layer 12 can also be a stretchable plastic, for example a heat-expandable plastic, which can optionally contain a blowing agent, such as polyurethane foam. According to the invention, this can The material used in layer 12 may also be heat shrinkable, for example as with irradiated polyethylene. Additionally If necessary, each of the materials mentioned can be provided with or with a glass fiber reinforcement in it other known means of reinforcing the material by adding elements that increase physical strength change or increase.

To a surface 16 (in Fig. 1, the underside) of the Layer 12 is attached (glued) to a longitudinally extending layer 18 of electrically conductive material. The surface 18a of the layer 18 is corrugated or knurled, as shown, for electrical and physical reasons or to increase the connecting contact area of the elements to be connected. The corrugations and / or rims are with the Composite strips used according to the invention shown in the further drawing figures are not shown; preferably has however, the surface of the conductive layer 18 which is in contact with the elements to be connected is corrugations or corrugations

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Randelungen or perforations for the reasons mentioned above on.

It can be any suitable electrically conductive material that can be deformed, and materials such as brass, aluminum, tin, copper, solder alloys, such as tin-lead solder, other commercially available alloys, etc. depending on the particulars restricted mechanical and conduction properties selected for the splice finally produced according to the invention. Alternatively, the conductive layer 18 may be a combination of solder and brass or, if necessary, solder alone. As described below a solder layer 18 (or a solder-brass composite layer 18) is used if desired is to flow not only the insulating layer 12 but also the conductive portion 18 using heat bring.

As indicated by the dimension 20, the conductive layer 18 has a second predetermined width which is smaller than that Width 15 of the non-conductive layer 12. As a result, longitudinal edge sections 22, 24 of the layer of non-conductive material extend. material 12 over the longitudinal edges 26 of the conductive layer 18. The function of these edge sections extending in the longitudinal direction 22, "24 will be described below.

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- ίο -

FIGS. 1Α to 1E illustrate various embodiments of a composite strip used in accordance with the invention. In FIG. 1A, the reference numeral 100 generally designates a composite strip comprising a non-conductive layer 102 and a conductive layer 104, both layers being approximately the same width and being connected or glued to one another.

The composite strip 106 shown in Fig. 1B is similar to the strip shown in Figs. 1 and 1A in that it has a layer of non-conductive material 108 to which a layer 110 of conductive material is adhered. He differentiates however, differs from the strips according to FIGS. 1 and 1A in that the non-conductive material also adheres to the longitudinal direction running edge cuts 112 and 114 of the conductive layer 110 is glued.

The composite strip 116 shown in FIG. 1C, which has a conductive layer 118 and a non-conductive layer 120, is similar to the composite strip shown in FIG. 1B. The non-conductive layer 120 is adhered to the longitudinal edges 122 and 124 of the conductive layer 118. The strip 116 differs from the strip shown in Figure 1B, however, in that the non-conductive layer 120 is folded over its ends and bent around a portion of the bottom 126 of the conductive layer 118, around the bottom 126 partially

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encapsulate.

1D shows a composite strip according to the invention 130, in which discontinuous pieces or sections of layers of conductive material 132 are attached to the non-conductive Layer 134 are glued on. In the embodiment of Figure 1D, all of the longitudinal edges 138 of the conductive material are opposite the longitudinal edges 140 of the non-conductive layer 134 are cut out. It should be noted, however, that the pieces are made of conductive Material have the same width as the non-conductive layer in the embodiment of Fig. 1A.

FIG. 1E illustrates a composite strip 150 comprising a layer of discontinuous conductive pieces 152 adhered to a non-conductive layer 154. As shown, the conductive pieces 152 are lateral to one another parallel. The width of the conductive pieces is the same as that of the non-conductive layer 154. Note, however, " that the conductive pieces can have a smaller width than the width of the non-conductive layer 154.

The conductive layer 18 may be attached to the non-conductive layer 12 by any suitable method - presently available techniques are heat and pressure bonding, solvent bonding, adhesive bonding, or any method with the end result of adhering layer 18 to the

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Layer 12.

In one embodiment of the composite strip according to the invention the non-conductive layer 12 is attached to the conductive layer 18 by means of an adhesive bond. On touch and pressure sensitive adhesives may also be used as a layer on either the conductive layer 18 and the non-conductive layer Layer 12 or one of these two layers can be applied. Layer 18 and layer 12 including between These two layers of applied adhesive are, for example, clamped between two rollers to connect the Layers pressed together. The touch or pressure sensitive adhesive used therein can be any conventional one pressure sensitive adhesives such as those based on natural rubber latep or synthetic latices based on styrene-butadiene rubbers, the conventional additives such as Contain tackifiers, plasticizers, and the like.

The touch adhesive can also be in the form of a separate tape with either side of it conventional pressure sensitive adhesive (as described above) is coated. The tape can be attached to either Layers 18 or 12 are applied and the other layer then placed on top of the tape to form the composite strip of the invention to build.

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Another adhesive or connection system suitable for use here is the dry adhesive that is applied to a or both layers 18 and 12 can be applied by doctor blade, spraying, brushing or rolling. Examples Such dryer adhesives are adhesive emulsions that are generally based on polyvinyl acetate (diluted with water), adhesive latices, based on synthetic rubber (diluted with water) and adhesive varnishes based on nitrocellulose, polyvinyl acetate, Styrene butadiene rubber, nitrile rubber and neoprene (solvent diluted).

The adhesive may also be a reactive adhesive, i.e. one produced by the chemical reaction of two Components harden; Examples of reactive adhesives are polyurethanes, polysulfides, epoxy and various known polyesters.

Hot melt adhesives can also be used i.e. those adhesives that are applied from their melt and harden through a change of state * and the connection produce. Such hot melt adhesives are polyethylene vinyl acetate copolymers, Polyamides, and thermoplastic polyurethanes.

The bonding of layers 18 and 12 can also be carried out using a solvent activator be a material that the surface of the non-conductive

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Layer 12 dissolves and lets it act as a self-adhesive, da.s the conductive layer 18 is attached by curing. Examples of suitable solvent activators are methyl ethyl ketone on nitrocellulose, tetrahydrofuran or dimethylformamide on thermoplastic polyurethane and methylene chloride on polyvinyl chloride.

The connection of layers 18 and 12 can also be used by thermal bonding, whereby the surface of a thermoplastic non-conductive tape (or the conductive layer 18) to the softening point on the non-conductive Layer 12 is heated and the two layers are pressed together and cooled..Is the non-conductive tape a thermoplastic material such as polypropylene, for example, the conductive layer 18 or the tape can be touched or radiant heating or by frictional heating. Further, when a nylon tape is used, ultrasonic bonding can be used of layers 18 and 12 can be carried out with the nylon tape. Finally, heat bonding can be done using the thermoplastic tape to connect the layers 18 and 12 can be carried out by resistance or induction heating of the conductor.

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The non-conductive layer 12 can also be connected to the conductive layer 18 by mechanical adhesion or attached to this, for example by snap fit, projections of the dielectric, which through holes in the Ladder protrude and then stretched at the back by pressure or heat, which is similar to riveting.

The composite layers 12 and 18 can also be formed by spraying or metallizing a layer of conductor material may be formed on the non-conductive layer 12 using conventional metallization techniques. This technique is particular Applicable in the manufacture of composite feed strips where discontinuous pieces of conductor material are used can be applied to form a stripe, for example, as shown in Figures 1D and 1E. Finally you can the composite strips are formed by known extrusion techniques.

In Figs. 2 to 6, the manner is illustrated in which an insulated splice is made from the composite strip 10 of FIG. 1 (but the other composite strips shown).

One end of the continuous one is fed by a feeding device Composite strip 10 conveyed into a channel 27, so. that he rested over a temporary anvil 35 comes under bending punches 28 and 29 (which come together

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move) and a narrow elongated drive plunger 30 is arranged, which in a displacement path between the Bending punches 28 and 29 is running.

The operating sequence is as follows: The punches 28 and 29 first move down and separate (by means of Shear edges 55, 55 ') a predetermined length L of the composite feed strip 10 from the rest of the strip feed. Thereafter the length L is bent around the anvil 35 and the desired one is bent by conventional downward movement of the bending punch 28, 29 Formed the shape of the inverted U, as shown in Fig.. It is to be noted and in particular arises taking into account FIG. 2 and FIG. 3, that after the separation of the length L, the length L extending in the longitudinal direction Edge sections 22 and 24 of the non-conductive layer 12 still from opposite sides of the conductive layer 18 stick away.

If the bending punches 28 and 29 - compare FIGS. 1 and 6 - have bent the length L into the appropriate shape, it lowers the driving ram 30 from between the punches 28 and 29 and drives the length L into an upsetting or folding die 32. It should be noted that that the anvil 35 when lowering the plunger from the displacement path of the length L of the composite strip 10, which in the described way was separated and bent, is pivoted out.

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The die 32 has a generally U 'shaped' socket 34 with a pair of sinks 36 and 38 for receiving wires 40 and 42, which are produced by the invention Splices are to be connected.

From Fig. 4 and Fig. 6 it can be seen that when lowering the plunger 30 and driving the length L into the receptacle 34 of the folding die 32 drives the sides of the generally U-shaped segment under, over and around the base conductors 44 and 48 and so form the final splice S as shown in FIG.

The new composite strip 10 not only makes the formation of a mechanical and electrical connection between one Pair of wires possible but also the insulation of such a splice formed in this way. Referring to Figure 6, wherein a cross section of the splice 8 shown in Fig. 5 is shown, it should be noted that the wire 40 in a typical application has a bare, stripped conductor section 44 and its remaining insulated section 46. In the same Thus, the wire 42 would have the bare stripped portion 48 and the remainder of the insulated portion 50. Is the Splice S formed around the wires 40 and 42 to be connected, connects the metallic conductive section 18 according to the invention the bare portions 44 and 48 electrically and mechanically, while at the same time the longitudinal edge portions 22 and 24 of the non-conductive part 12 from the insulated portion 46 of the wire 40 to the insulated portion 50

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2403687

of the wire 42 protrude and thereby the metallic portion of the splice and also the exposed portions of the bare Completely insulate conductors 44 and 48.

As stated previously, it is an advantage brought about by the invention that, if necessary, not only an isolated splice of the manner described above can be formed, but that the inventive Method enables the formation of a sealed, moisture-proof, insulated splice. In the practical Application of this aspect of the present invention is the the material forming the layer 12 of non-conductive material is selected from any of the aforesaid thermoplastic resins, which are heat fusible (i.e., melt and flow when a predetermined softening temperature has been reached). According to the invention, there is the only further step required to produce a sealed, insulated splice is, to heat the splice S above the softening temperature of the material selected in this way, so that the layer 12 according to FIG. 5 forming material in sealing with the wires 40 and 42, in particular at the by the reference numerals 52 and 54 in Fig. 5 designated connections flows, whereby a sealed insulated splice, which against moisture and other Impurities is tight, is produced.

According to the invention, the heat can be supplied according to various Procedure. In the embodiment according to Fig.

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For example, heating coils 75 are disposed within the folding die 32 and an electrical source (not shown) is through conductors 56 connected to the folding die 32 to a temperature above the softening point for the layer 12 To heat non-conductive material selected material. · If the Splcisz S is formed in the folding die 32, it will open in this way the non-conductive material 12 is melted so that it is sealed to the pair of conductors 44, 48 in the manner previously described Way clings.

According to an alternative method, the composite strip 10 according to the invention initially to a temperature just below the melting point of the non-conductive layer forming material preheated. After that, the generated during the Bicgc and deformation process generated additional heat the necessary temperature rise in order to allow the material 20 to flow in sealing with the pair of connected wires 40 and 42.

In a further embodiment, in the splice and induction heating applied to the wires until the softening temperature of the material forming the non-conductive layer 12 is achieved, thereby bringing about the desired seal will.

In yet another embodiment of the method according to the invention, the heat supply to the splice is

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separated process' carried out after the splice and the wires connected thereby were removed from the folding die 32. In this way, the seal you want can be any Time, at any place and selectively by only the user, the moisture-proof seal consider necessary. It should be noted that when using heat-shrinkable thermoplastic or expandable Resin for the material 12 then during this material

«
the heat supply in a denser and safer splice

shrinks.

If the composite strip shown in Fig. 1B is used to form a splice, the splice does not scratch any exposed surfaces made of conductor material. It should also be noted that when using composite strips of FIG. 1D and 1E, to form a splice, the strips preferably along the non-conductive layer between the separated ones Pieces of conductor material are separated.

In Fig. 7 is another embodiment of the invention Composite strip 10 'shown. Like the strip of Figure 1, the strip 10 'has a non-conductive layer 12 'and a conductive layer 18'. In the embodiment of Figure 7, however, the conductive layer 18 'is generally T-shaped Cross section and has a stem portion 58 and a pair of arms 60 and 62 extending in opposite directions extend from it. As can be seen from Fig. 7, are

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the longitudinal edge portions 22 'and 24' of the layer 12 'are folded and bent over the arms 60 and 62 and encapsulate them. In this way, when a splice S ¹ according to FIG. 8 is formed from the composite strip 10 'according to FIG. 7 in the manner described with reference to FIGS. 2 to 6, the resulting splice S ¹ necessarily has reinforcements in the form of arms 60 and 62 for improvement the mechanical uniformity of the splice S ¹ and to prevent the splice from opening.

In Fig. 7A, another embodiment is one composite strip generally designated by reference numeral 260 is shown. This embodiment has as with the previous ones For example, a non-conductive layer 162 attached to a conductive layer 164 in the embodiments described in FIG. the Conductive layer 164 is generally L-shaped in cross section and therefore has a portion 166 in the shape of a short one Leg and a section 168 in the form of a longer leg. As shown in Fig. 7A, the one is longitudinal Edge portion 170 of non-conductive layer 162 is folded and bent over long leg portion 168 and encapsulates it a.

In Fig. 10 is yet another embodiment of the composite strip 10 'of the invention. Of the Composite strip 10 '' is the same as the composite strip 10, that it has a layer 12 'made of non-conductive material,

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on one layer 18 ″ made of electrically conductive material is attached. Dex composite strip 10 '' is different of the strip according to FIG. 1 in that layers 64 "are attached to the longitudinal edge sections 22" and 24 " made of electrically non-conductive, meltable, flowable adhesive material, such as polyvinyl acetate, polyamide, polyethylene, polyurethane and the like are glued. If the composite strip 10 ″ is used to form an insulated splice in the Used in the manner described with reference to FIGS. 2 to 6, the adhesive layers 64 increase, particularly when heated furthermore the integrity (mechanical uniformity) of the splice. The layers 64 can also take the form of Have solder strips such as tin-lead solder.

In one embodiment of the composite strip 10 ¹ · according to FIG. 10 and / or of the composite strip 10 '"according to FIG. Conductive material can comprise a heat-shrinkable plastic such as irradiated polyvinyl chloride, Teflon FEP, or various olefin polymers; the heat of the solder layer causes such heat-shrinkable plastic to contract around the wires to be connected.

It should be noted that each of the composite strips of the present invention described has a conductive layer thereof Solder layer can be.

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The composite strip 10 '' according to FIG. 12 is identical to the composite strip 10 "'according to FIG. 10 with the exception that the electrically conductive layer 18" is partially embedded in the non-conductive layer 12 ". The composite strip 10 ¹ '. ¹ ' shown in FIG. 11 is the same as the composite strip 10 '' of FIG. 10 except that an elongated flat stiffener 66 is encapsulated in the material of the non-conductive layer 12 '' to provide mechanical integrity of the splice formed in this way.

It should be noted that in each of the described Composite strips according to the invention, the surface of the layer of electrically conductive material used, which the Layer of electrically non-conductive material is adjacent, perforated or corrugated to the adhesive strength to increase the two layers on each other.

In Fig. 9, a further embodiment of a folding die 32 'according to the invention is shown. As can be seen from FIG is, the seam 32 'has a number of segments 68, 70 and 72 that look the same and when aligned and attachment to one another by bolts 74 to form the shape of the desired overall die. According to one aspect of the invention however, middle segment 70 is case hardened or heat treated while outer segments 68 and 72 are not are treated, whereby their costs compared to the middle segment 70 are significantly reduced. Through this measure

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if softer segments 68 and 72 could be used, because - as can be seen from Fig. 4 and 6 - the stronger mechanical impact on the central portion of the length L of the severed composite strip 10 must be exercised where the metallic conductive layer is located, and accordingly must only the middle segment 70 of the folding die 32 according to FIG. 9 consist of hardened material.

As can be seen from Fig. 6, the are isolated with a view to making a sealed Splice's most critical areas at the outer ends of the non-conductive portion 12 of the splice (i.e. through denoted by reference numerals 52 and 54 in Fig. 6). According to a further feature of the invention, as shown in 9 the heating coils 75 can only be arranged in the segments 68 and 72.

The folding die 32 shown in FIG. 4, the folding die 32 'shown in FIG. 9 or any other used according to the invention Folding die can be a device for inserting non-conductive material, such as a plastic material according to .den previous embodiments-, in the die cavity between the wires arranged therein to ensure that the completely splice is suitably insulated. An example of a seaming die is shown in FIG. 9A and is generally labeled with FIG Reference numeral 32 '·' denotes. The folding die 32 * '' has a device for introducing molten plastic

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material into the cavity, which may be in the form of an injection molding cavity or channel 302 and a series of openings 304. In addition, the die has 32 ^flt heating coils 75.

When forming a splice using the folding die according to FIG. 9A, a Few elements of molten plastic are injected into channel 302 and through openings 304 against the splice. Of the Molten plastic seeps into all cracks or openings and against the metal parts "of the splice for full insulation. The die and / or splice is then cooled before the completed splice is removed from the cavity to ensure that the injected plastic has solidified.

Regardless of the folding die used, this can be done when the method according to the invention is carried out after formation of the splice, before the splice is removed from the cavity, by the throughput rate of the splicing machine to improve.

13 shows a composite strip according to the invention, generally designated by the reference number, which in particular is suitable for making connections to be attached to conductors. The strip shown has a conductive layer 172, part of which is connected to a non-

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conductive strip 174 is adhered as shown. The non-conductive strip is designed to fit the Insulates portion of conductive layer 172 that directly contacts the conductor. Thus, a terminal 176 is formed and from severed the remainder of the strip by cutting along the area shown by broken lines 179. The separated Blank part 176 has an eyelet section 180 and an approximately T-shaped section, which has flanges 182 and 184, which contain the non-conductive layer 174 and on the conductor is clamped; the non-conductive layer 174 can extend beyond the flanges 182 and 184, as shown in FIG. is shown.

14 illustrates a machine for carrying out the method according to the invention, which has a device for forming a composite feed strip made up of a separate feed of non-conductive material and a separate feed of conductive material Having material. The machine has a stand 201, an electric motor 202, a toggle switch 203 for the Motor, a control box 204, a single rotary joint 205, a belt 206, a pedal switch 207 and an output shaft 208. These parts are conventional.

The machine also has a reel 209a, which carries a supply of conductor material 210a, and a reel 209b carrying a coil of non-conductive material 210b. Pinch rollers 198 and 199 form the composite strip when the

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Conductor material 21oa and the non-conductive material 21ob is guided between the nip of these rollers. The machine can also be provided with a device 225 for feeding a layer of adhesive between the strips 210a and 210b before these run through the nip of the rollers 198 and 199, be provided.

One end of the composite strip 210 is over a curved guide plate 211 and between two identical feed cams 212 and then drawn into a metal tube 213 leading to the cutting and folding station of the machine. The only ones in the Parts easily recognizable in the drawing are the die plate 214, a support 215 for the die plate and a spindle 216 for Adjusting the position of the carrier 215. Finally, further easily recognizable parts are the shaft 217 on which the feed cam 212, a cam surface 218 on the feed cam 212 and a slot 219 extending from one end of the cam surface 218 goes out.

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Claims (22)

Claims I 1.! Isolated splice or connection, characterized in that that it is formed by a strip of a layer of permanently deformable electrically conductive material that can maintain its deformation and on which a layer of electrically non-conductive material on a Surface is attached. 2. splice according to claim 1, characterized in that the other surface of the layer of conductive material is fluted or knurled (18a). 3. splice according to claim 1 or 2, characterized in that the layer of conductive material between the Longitudinal edges of the layer of non-conductive material is arranged such that first and second longitudinal edge portions of the layer of non-conductive material extend over the longitudinal edges of the layer of conductive material. 4. Splice according to one of claims 1 to 3, characterized in that the elongated layer of conductive material (18 ¹ , 118 or 164) is embedded in the elongated layer of non-conductive material. 409835/0818 - 19 - 5. splice according to claim 3, characterized by a first elongate layer of electrically non-conductive adhesive (64) adhered to the first longitudinal edge portion of the layer of non-conductive material. 6. splice according to claim 5, characterized by a second elongate layer of non-conductive adhesive (64) adhered to the second longitudinal edge portion of the layer of non-conductive Material is glued. 7 «Splice according to claim 3, characterized in that the elongated layer of conductive material (18 ¹ ) is generally T-shaped in cross-section and has a central stem section (58) and first and second arm sections (60, 62) which extend after extending opposite sides of the trunk portion, wherein the first and the second longitudinal edge portions of the layer of non-conductive material are crimped so that they enclose the first and second arm portions, respectively. 8. splice according to claim 3, characterized in that the longitudinal edge portions of the layer of non-conductive Material (108) over the longitudinal edges of the layer of conductive Material folded and glued to it. % 09835/0816 - .30 - 9. splice according to claim 3, characterized in that the longitudinal edge portions of the layer of non-conductive Material (18 * or 118) over the longitudinal edges of the layer conductive material are folded and bent around and partially the lower surface of the layer of conductive material lock in. 10. splice according to claim 4, characterized in that the layer of conductive material is generally L-shaped Has a cross-section and a short leg cut 164 pounds) and a long leg section (168) wherein a longitudinal edge (166) of the non-conductive material is folded over and includes the long leg portion. 11. splice according to claim 1, characterized in that the width of the layer of non-conductive material (174) is smaller than the width of the layer of conductive material (172). 12. Splice according to one of the preceding claims, characterized in that the layer of non-conductive Material is heat fusible. 13. Splice according to one of the preceding claims, characterized in that the layer of conductive material has separate, discontinuous, spaced pieces (132 or 152) of conductive material attached to the layer 409835/0816 made of non-conductive material are glued on. 14. A method for producing a splice or connection according to one of the preceding claims, characterized characterized in that a continuous composite strip made of a layer of electrically non-conductive material, which is attached to a surface of a layer of permanently deformable electrically conductive material, supplies a severing a predetermined length of the strip and that the severed Folded in length. 15. The method according to claim 14, characterized in that that the layer of electrically non-conductive material is heat-fusible and that the electrically non-conductive material is heat sealed after the hemming process. 16. The method according to claim 15, characterized in that the workpiece is pressed into a die during folding and that the splice or terminal is allowed to cool after the heating process before it is removed from the die. 17. The method according to claim 14, characterized in that the layer of conductive material between the longitudinal edges the layer of non-conductive material is arranged, whereby a first and a second longitudinal edge portion of the Layers of non-conductive material extend over the longitudinal edges of the layer of conductive material, and that an elongated layer of electrically non-conductive adhesive 409835 / Ü818 Fabric on the first longitudinal edge portion of the layer of non-conductive Material is glued and that heat is supplied after the folding process to melt the adhesive. 18. Device for performing the method according to one of claims 14 to 17, characterized by a device for heating the non-conductive material. 19. The apparatus according to claim 18, characterized by a die with a body portion in one of which A generally U-shaped receptacle is provided on the surface, and means (75) for heating the body portion (32). 20. Apparatus according to claim 19, characterized in that the body portion (32 ') has a number of segments (68, 70, 72) which are releasably attached to one another. 21. The device according to claim 2O _9, characterized in that the segment (70) arranged in the middle is harder than the other segments. 22. Device according to one of claims 19 to 21, characterized in that the device for heating the Body portion is provided in the segments with the exception of the segment (70) arranged in the middle, 409835/0 81 p Read more