DE2021397A1 - Tape connection for coated tapes - Google Patents

Description

PAT E NTAN WALT

DR.HANS ULRICH MAY ^ u. ^. Ioo /.

D a MÜNCHEN 2, OTTOSTRASSE 1 a

TELESRAMMEr MAYPATENT MONKS

TELEPHONE C0S1O 593682

14011 Munich, April 30, 1970

-_ " Dr, M. / Mj.

Ö-7-P-29/841

General C able G orporat ion in New York, V.St. ν.Ä.

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Bandve ^ binding for badly tied bands

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According to the invention, the soles elelityisciier cable shielding tapes are connected to one another by an electrically conductive strip, in which the flexible, overlapping ends of the shielding tapes are inserted and have tabs protruding from both sides, which provide the corrosion protection on the connection of metal abutment tapes Make ssu metal with the overlapping ends of the belts "so that they have an (auxiliary electrical conductivity) and are" eciianiseh locked against axial movement relative to each other "- ·. '-

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as a shield and moisture barrier (moisture barrier) used with electrical cables. The task of electrically connecting the shielding tape with no other properties Affecting the tape is of considerable importance. The usual solution to this problem, namely stripping the shielding tape except for the metal, spot welding the metal and coating the exposed area with insulation; is time consuming and cannot completely restore the integrity of the shielding tape. If at the time of manufacture If thin metal layers such as foils are used in the shielding tape, the insulation is removed as part of technical manufacturing process practically impossible.

The object set is achieved according to the invention in that the overlapping ends of shielding strips are connected to one another be by placing between them a connecting strip made of a metal with good electrical conductivity, which is essentially has flaps printed out perpendicularly on each of its sides, is inserted »The length of the flap is determined by the diameter of the printed hole and the thickness of the metal strip. It can therefore be set so that various Depths of the insulation are penetrated in order to make contact with the metal of the insulated cutting tapes, this Metal jedoefe s & ielut a © twdadigem "/ eise ssti pierced or to breefeen

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is made between the shielding tapes "

The connecting strip itself can be made of polyethylene-coated Metal or bare metal. In cases where the Shielding tapes have a minimum thickness of the plastic coating. A connecting strip made of coated metal is preferably used to ensure a hermetic seal. It has been found that connecting elements according to the invention used in overlapping belt connections

strips have a contact resistance of about 10 ohms The connector strips of the invention withstand use with a 0.203 mm thick aluminum shielding tape with a 0.051 am coating of a high voltage load through which the aluminum strip itself melts »without changing the contact resistance of the connection point again · heat-sealed Overlapping tape connections with the connection strips according to the invention do not fail in the event of a tensile load at the connection point, but rather the shielding tape itself breaks in one of the area away from the junction.

Further purposes, details and advantages of the invention result from the following description of a preferred embodiment - form. The description refers to the attached drawing, in which corresponding parts are provided with the same reference numerals in all figures. Show it:

Fig. 1 is a schematic view of an electrical cable, the Shielding: tapes are connected to one another with a connecting element according to the invention:

Fig. St an enlarged schematic section along 2-2, - - the Fig.- If ■. ^: ; -; - ■

009847/1165

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3 shows a greatly enlarged section along the line 3-3 of Figure 1 in section;

Fig. 4 is a partial perspective view showing how the Tabs are pushed away from the main piece * of the connecting strip according to the invention;

Figure 5 is a section of the connecting strip showing how the length of the tabs of the connecting strip is determined by the size of the opening from which it is pushed out are and

FIG. 6 shows a greatly enlarged section along 6-6 of FIG. 4.

Fig. 1 shows a cable 10 with a shielding tape 12 longitudinally a section of the cable tied to another shielding tape 14 which extends along another portion of the cable. Each of the shield tapes 12 and 14 consists of a metal foil which is coated with plastic to protect against corrosion. Any of these shielding tapes is laid lengthways around a cable core 16 and has a longitudinally running overlap seam 18. The end of the shielding tape is designated by 22 and the end of the shielding tape 14 by 24. Within the overlap area of the bands 12 and 14, i.e. between the ribbon ends 22 and 24, there is a connecting strip or ribbon connector, hereinafter referred to as a connector 30 is designated.

The connector 30 extends under the overlapping portion of the shielding tape 14 and on the outside of the shielding tape 12 around the latter. For a clearer graphic representation is. the thickness of the parts in the drawing is greatly exaggerated _; and in practice the thickness of the parting tapes 12 and 14, including the plastic coating, is applied

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the bands, between 0.152 and 0.406 mm.

The connector 30 is made of sheet metal or metal foil with a thickness somewhat greater than the thickness of the metal foil of the shielding strips 12 and 1.4 in order to obtain tabs with sufficient strength for the desired purpose. In the preferred embodiment, connector 30 is made of a material between O _r O25 and 0.254 mm in thickness.

Fig. 4 shows how the connector 30 is formed with holes 32 and 34 is where the metal pushed out of the holes in the is bent away substantially perpendicular to the remainder of the connector 30 to form tabs 36. Some of the tabs 36 extend from the Main part of the connector 30 upwards, like the hole 32 all around shown, other tabs 36 'downward, as around the hole 34 shown. Preferably there are an equal number of holes with inwardly like those with outwardly curved lobes, so that the connector works evenly with the shielding strips above and below it »

The length of each of the tabs 36 is essentially equal to the radius of the opening from which the tabs are pushed out. 5 shows a connector 30a with an opening 32b with upwardly directed tabs 36a and a further opening 34a with downwardly directed tabs 36b. The tabs 36a are long enough to penetrate the coating on the shielding tape that contacts the top of the connector 30a of FIG. 5, while the tabs 36b are long enough to penetrate a coating on the lower Side of the connector 30a comes into contact.

Fig. 3 shows the connector 30 installed between the Abscairimnigs-

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tapes 12 and 14. As shown, shield tape 14 has one thin plastic outer coating 411 a metal foil strip 42, preferably made of aluminum, and a lower plastic coating 43 of greater thickness than the outer coating 41 ♦ The shielding tape 12 has a thin outer coating 47, a metal foil tape 48 and a thicker inner coating 49, The two coatings 43 and 47 facing the connector 30 are of different thicknesses, which is why those from opposite sides of the connector 30 protruding tabs 36 and 36 'are different are long as shown in FIG.

The connector shown in Figure 1 has angularly spaced apart Rows 44 of openings 32 and 34. Rows of openings 32 with upwardly directed tabs 36 alternate with rows of openings 34 with downwardly directed tabs 36 '. the end For the sake of ease of manufacture, the lobes of all openings extend in the same direction every other row, however other configurations can be used and a staggered arrangement of the openings instead of the one for the preferred configuration ^ showed row-wise arrangements to be chosen.

3 shows how the tabs 36 of the left opening 32 penetrate the plastic coating 43 and make contact with the bare metal of the foil 42. The drawing shows that the tabs 36 press the foil 42 and push out slightly at these points ,, as' the bumps 56 on the © gallows the cloth against 1 iegeadea string "ta ³ Case" Thereby, a relative movement of the ÄbaeMsmmfpbaEdes 14 in Aseiair layer tang besiigiicli des conn @ rs

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In the case of the opening 32 on the left in FIG. 3, the plastic layer fills 43 of the shielding tape 14 the space between the tabs substantially after the tabs have been pushed through the plastic layer. But around other rags To be able to clearly show 36 as the lobes 36 'of the opening 34 lying in the sectional plane and correspondingly, that is in fact between the tabs 36 of the opening 32 on the right

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and between the tabs 36 'of the opening ~ 34 / broken away to the Flap on the far side of these openings and type too show, in which these tabs also press in the metal foils 42 and 48 and thus enlarge the contact area of the electrical connection and serve to anchor connector 30 to shield straps 12 and 14 and thereby connect the two straps.

The degree to which the tabs 36 depress the metal foils 42 and 48, can be chosen. It depends largely on the length of the tabs 36 with respect to the thicknesses of the coatings 43 and 47

and to a certain extent from the pressure / with which the outer impressed will,

shielding tape 12 against the connector 3ö / and the resulting pressure of the connector 30 against the shielding tape 14. The tabs must contact the metal foils 42 and 48. In order to -. If a connection is obtained that is as strong or tighter than the bands 12 and 14 at axial tension, the flaps should indent the foils 42 and 48 to a depth at least about equal to the thickness of the foil. In the preferred embodiment, the film thickness is about Oj0178 mm; advantageously in the range of 0.0127 to ₁ O 33 mm.

,, The tabs 36 should be designed so that they have holes through the Press foils 42 and 48. However, this is not necessary and requires longer flaps and larger openings that make up the flap

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be pushed out. The projections formed by the tabs 36 can be done in ways other than by pushing them out of the body of the connector all around and into the edges of through the connector punched holes are made.

The coating layers 41 »43, 47 and 49 each have a thickness of about 0.051 to 0.229 mm. In the case of aluminum foil, the plastic coatings are a polyethylene copolymer with reactive carboxyl groups to ensure good adhesion of the corrosion protection coating obtain. If the coatings are thin, they are over their thickness homogeneous. If the plastic coating on the aluminum foil is thicker than about 0.102 mm, the more economical the copolymer is to be used for a layer 0.051-0.102 mm thick adjacent to the film and JEUr the remaining thickness of the plastic coating to use a polyethylene homopolymer.

When the arrangement of the connector 30 with the shielding tapes 12 and 14 'as shown in Fig. 3, the action of heat and Is subjected to pressure, the plastic material in contact with the connector 30 melts and forms thereon a hermetically sealed tape connection in which the entire metal is covered with plastic and thus protected from corrosion is*

As discussed above, friable connector 30 is not made of coated Made of metal if it is to be used with shielding tapes 12 and 12, which coatings are of considerable thickness, which can melt to cover and protect the surfaces of the connector BU. However, if the shielding tapes a very low coating thickness of 0.051 to 0.102 mm have, it is desirable that the connector 30 be made of metal

009847/1165 _BAD

that is itself plastic coated to protect it from corrosion to protect. In the connector shown in the drawing, the coating is preferably applied before the tabs are off the main part of the connector are pushed out so that the Tips of the lobes are uncoated,

For the sake of clarity, the connector 30 is uncoated shown, except Fig. 6, which is a much larger scale so that the coating can be shown. A main part 60 of connector 30 made of metal Intermediate-iCoplastic coatings 61 and 62 are arranged, which consist of the same material as for the coating of the shielding tapes 12 and 14, or any other plastic that bonds to the coatings of the shielding tapes.

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Claims (1)

Claims 1, J tape connection aur the production of a continuous electrically conductive connection from a tape, which includes a metal strip coated on both sides plastic-coated for the purpose of corrosion protection, to a next similar tape, characterized in that protruding metal elements are provided between overlapping end sections of the tapes, which protrude from the metal strip of the extend a band through the facing plastic layers in the overlap area of the bands to the metal strip of the other band and establish a continuous electrical connection between the metal strips of the bands. 2, band connection according to claim 1, characterized in that between the overlapping end sections of the bands a metallic Connector attached. which has a main part, and that the protruding metal elements from the main part are sharp Voisprtinge directed in opposite directions, which through the plastic coating of the metal strips penetrate into contact with the metal strips of each of the bands » 3. Belt connection according to claim 2, characterized in that the inside of one band overlaps the opposite outside of the other band and the thickness of the plastic coating on the side of one of the bands is significantly greater than the thickness of the Kwaststofftiberschicht on the opposite side of the other band "*" and the advance days on the opposite sides of the connector have different lengths. steias @ in @ n part ö © 3? Compensate for greater thickness of the coating, the 0 0 9 8 4 7/1165 BAD ORIGfNAL 4 · Belt connection according to spoke 2, characterized in that the plastic coatings at the overlapping end segments the ligaments - held together by fusing together, are, The connector is fastened with plastic fastening material for the straps all of its surfaces that are not in contact with the metal strips the belts are standing, covered and protected from corrosion and the ends of the metal strips by plastic coating material are protected by surfaces at the overlapping ends of the Tapes leaked. .5 tape connection according to one of claims 2 to 4, characterized in that that the connector is a piece of metal different from the metal strips of each of the bands " 6. Belt connection according to one of claims T to 6, characterized in that that the metal strips and the protruding metal elements consist of a metal with good electrical conductivity and the metal strips have a thickness between 0.0102 and 0.0203 mm and the coatings on the strip have a thickness between about 0.051 and 0.127 mm. 7. tape connection according to claim 6, characterized in that "the metal strips and the protruding metal elements Aluminum and the coatings on the strip made of a polyethylene copolymer with reactive carboxyl groups that create a chemical bond between the coating and the aluminum. 8. A structural connection according to claim 7, characterized in that on at least one of the opposite surfaces of the tapes, part of the coating consists of a high-density polyethylene which is fused to the copolymer at a point which is at a distance from that coated by the copolymer Metal strip is located. 009847/1165 BATH ORIGINAL 9. Band connection according to one of claims 1 to 8, characterized in that the projecting metal elements have tips at their ends which extend into contact with the facing sides of the metal strips and push away from this metal, so that the contact surface of the tips with the metal strips and the metal strips and protruding metal elements are locked against relative movement parallel to the planes of the facing surfaces of the metal strips, and the coatings on the facing sides of the strips are bonded together and hold the strips in contact with one another. 10. Belt connection according to one of claims 1 to 9, characterized in that that the protruding metal elements are tabs which are pressed out of the connector to form an opening in it are and remain connected to it at one edge of the opening and are substantially perpendicular to the side of the connector, from which they extend, have turned. 11. Band connection according to claim 51, characterized in that the connector is a metal sheet with a plurality of openings extending through it, in which the is displaced from the openings Metal lobes form extending from some of the openings around theirs Edges around upwards and from others of the openings around theirs Rims extend downward around and form the protruding metal elements which the plastic coatings on the one another penetrate connected ligaments. 12. Tape connection according to claim 11 in an electrical cable, characterized in that the cable includes a core having a conductor surrounded by electrical insulation around the 009847/1165 one of the tapes over part of the cable length as a shield is wrapped while another tape is wrapped over another, however the subsequent section of the cable is wrapped around the conductor as a shield, and the tapes are used as a shield and moist ice It's sealing for the soul and serving the metal strips in the Tapes through the connection at the overlapping tape ends Form a continuous electrical circuit along the various parts of the cable. 13. Belt connection according to claim 12, characterized in that that each band is wrapped lengthways around the core and that the lengthways edge the tapes are connected along seams which extend the length of the cable and the connector extends substantially across extending the full width of the ribbons around the circumference of the cable and a substantially smaller axial length than its extent in the circumferential direction 14. Belt connection according to claim 12 or 13, characterized in that that the openings in the connector in a plurality of axially extending rows and a plurality of longitudinally running rows are arranged, the lobes on top of one another subsequent openings of each of the rows are in opposite directions Directions extend from the body of the connector and make contact with one or the other of the straps, respectively. 15 tape connection according to claim 3, characterized in that that the connector is inserted between the overlapping strap portions of the Straps is inlaid metal sheet, which is a plurality of through the sheet metal has openings extending therethrough, from which the metal in the form of lobes, from some of the openings all around their edges upwards and from other of the openings around them 00 9 847/1 165 BATH ORIGINAL Edges is pushed down, out and forms projections which penetrate the plastic coatings of the tapes, the tape connection being formed in an electrical cable which contains a core which has a conductor surrounded by electrical insulation, and in which one of the tapes wrapped as a shield around the insulated conductor for part of the length of the cable and the other tape as a shield around another _; however, subsequent part of the length of the cable is wrapped, the overlapping ends of the bands from the metal strips in the bands one along the various parts Current ,
of the cable form a continuous / circle and the tapes are applied to the core as a shielding and moisture seal, the lobes at their ends have tips which make contact with the metal strips of the tapes and extend into the strips and metal from the Areas of the strips displace so-that the contact area of the tabs with the strips is enlarged and the connector and the metal strips are locked against relative movement in the direction of the course of the strips, thus preventing a longitudinal break in the strip connection, with the plastic coatings also being applied to those facing each other Strings of the overlapping end portions of the tapes are fused together to keep them in contact with the connector. BATH ORIGINAL 09847/1165