DE920612C - Films suitable for the manufacture of electrical capacitors and processes for their manufacture - Google Patents

Description

Foils and suitable for the production of electrical capacitors Process for their manufacture In the manufacture of electrical capacitors, as a dielectric a paper film, z. B. impregnated paper own is it is known to produce one or both coverings in the form of metal layers, directly on the surface of the paper foil z. B. deposited by evaporation in a vacuum are. Such capacitors made from metallized paper foils are called MP capacitors. When making the assignments for these capacitors is It is common to apply the covering metal layer only to predetermined areas of the paper apply by z. B. masks during the vapor deposition or _N-1_etallisierungsvorganges can be used, so that a priori only part of the surface of the paper film is provided with a metal coating. It's already known the whole surface to metallize the paper and then remove the metal layers at the points where the surface of the paper should be free of metal deposits. So will z. B. in many cases a strip of metal layer along the edge of the metal paper strip burned away to get a metal-free edge and a short loop between the opposing polarity, each applied to one side of the paper film of the Avoid condenser. When the edge metallization is removed, it usually slips the paper strips over rollers that are connected to a voltage source from a few zoo volts are connected in series with a current-limiting resistor, so that a series of small spark discharges or arcs between the metal roller and the metal layer arise. The metal layer is here by the heat the electrical discharge evaporates, so that a free strip of paper along.der Trace of the wave the role remains.

In the manufacture of wound capacitors from such films however, it is necessary to wrap at least two foils together at the same time, otherwise the opposite polarity applied to the opposite sides of a film Assignments of the capacitor would short-circuit each other in the winding.

The invention now relates to dielectric films, e.g. B. made of plastic or paper suitable for making electrical capacitors the formation of capacitors made from such films and on devices and processes for the production of such foils or capacitors. In particular it is proposed to use a simple metalized strip of paper or equivalent Manufacture insulating materials, with the longitudinal or transverse strips from the metal coating removed or gradually burned out, e.g. B. by electrical discharges, namely at certain intervals on the metal layer or the metallic coating on .dem strip in order to obtain successive metallized areas that in the coiled capacitor work alternately by being each other in the capacitor winding are as exactly opposite as possible and so are the opposing polarity assignments of the capacitor -form like this .z. B. in the later explained Fig. 31 bis 33 is shown. The assignments made on such a strip are both applied to only one side of the dielectric film. From such foils Manufactured capacitors only need this one film for their manufacture, because when winding such a film, the two assignments no longer as before be short-circuited in the coil. These capacitors not only have the on well-known advantage of self-regeneration and self-healing Type of MP capacitors, but above all the further advantage of a substantial Simplified manufacturing technology in which only a single film is wound must, whereby the measures for guiding and aligning a plurality of foils are superfluous in the manufacture of the usual condenser units.

The invention proposes' further on a dielectric film for the purpose Manufacture of such single-film MP capacitors both electrodes on the same Form side of the dielectric strip by making a zigzag, sinusoidal, rectangular or similar track with corresponding successive longitudinal and transverse dividing strips is burned into a metal coating, initially as a coherent thin Metal layer was applied to one side of the film. The resulting Corresponding metallized areas of opposite polarity can z. B. by a rolling on the metal coating burnout wheel or such Burnout roll can be made with a corresponding template pattern is provided on its circumference, around the areas mentioned, in the following electrode surfaces or called fields, with the required dimensions .. It is obvious that as the winding of the metallized films progresses into a winding of the The circumference for each layer of the roll increases by the amount z z - T, where T is the thickness, of the strip, is. The dimensions of the consecutive Electrode areas increase when these, as provided according to the invention, in the different wrapping layers should take the same wrapping angle if possible. The burnout wheel .must have a circumference that is sufficient for the subdivision of the entire The length of the metallized surface of the strip is sufficient; also the z. B. applied to the circumference of the burnout wheel pattern so that the distance between successive horizontal stripes increases by the value, and in such a way that the length of the consecutive occupancy fields is as precise as possible equal to the arc length of the angle in the con @ .densator winding .is, the z. B. the electrode area the other occupancy covered on the previous layer of the roll. In this way there will be an exact opposite of those belonging to one another for the entire lap Occupancy fields of opposite polarity guaranteed.

If the burnout agents did not meet this requirement, so that the horizontal stripes produced by them: have the same spacing from one another or the fields of the assignments are of the same length, each successive metallized field occupy an increasingly smaller part of the circumference of the coil, since this circumference increases with each layer of the roll. The fields would be in this Case no longer fit together, but against each other from layer to layer in the roll be offset., so no longer exactly opposite each other, whereby -the Capacity of the roll would be significantly reduced.

The use of the burnout wheels or rollers described above for the production of a film of the type described is essential. Disadvantage, .that each burnout roller is only used for the production of a specific capacitor, z. B. of a certain size or capacity, and only certain for one strip Thickness and length is appropriate.

The invention is smaller for the manufacture of capacitors, capacitors Dimensions and small capacity very suitable; but if the invention for the production of large capacitors is to be applied, this is when using The burnout wheels described above are difficult to achieve. Such wheels are even if, they bow for the manufacture of capacitors of small dimensions. small capacity can still be considered useful for the production of large Capacitors or large capacities z. B. from o, i, u F and above unsuitable because they are unwieldy for this purpose.

The invention therefore has the further object of solving these mentioned difficulties in the production of the films for the single-film MP capacitors mentioned, in particular also for the manufacture of larger units and capacities, to eliminate, and suggests particularly suitable procedures for this. In particular, according to the invention the possibility of using one and the same device for different sampling, d. H. for burning in various metal-free surfaces separating the coverings suitable to make. by setting options are provided that an adjustment of the sampling device for different thicknesses of the dielectric film and for the Manufacture of different capacitors, with different dimensions and capacities allow a wide range.

Further details of the invention can be found in the following descriptions fig.; up to 34.

Fig. I shows a strip of paper coated with metal, which contains a burned-out zigzag-shaped pattern, in which alternating electrode surfaces (fields) of opposite polarity, which face each other in the coil or capacitor, are created; Fig. Figure 2 shows a similar metallized strip with an improved electrode pattern in accordance with the invention; Fig. 3 and 4 show further metallized strips that have modified occupancy patterns and are suitable for the production of capacitors with two or three layers of paper or dielectric between the electrodes with opposite polarity; Fig. 5 illustrates schematically a burn-out or patterning method according to the invention, where a simple burning roller with variable speed is used for patterning the metal paper strip, which is moved at an essentially constant speed; Fig. Figure 6 is a top view of the burnout roller of Figure 5; Fig. 7 shows the surface of the burnout roller in developed form; Figs. 8 A to 8 B show modified shapes of the patterns on the burnout roller. in a form suitable for producing electrode patterns according to FIGS. 2 and 3; Fig. 9 illustrates schematically a mechanical device for monitoring the speed of rotation, as required in connection with the invention; Fig. Io is a graphical explanation of the operation of Fig. I; Fig. II is a schematic diagram similar to Figure 5, wherein both the Dielektrikumfolie are driven as well as the Ausbren.nrolle with different speeds during the Ausbrennvorganges. Fig. 12 is a graphical illustration of the operation of the device of Fig. Ii; Figure 13 shows a variable speed electric drive device according to the invention; Figure 14 shows an arrangement similar to Figure 5 in connection with the winding of a finished capacitor; Figure 15 is a graphical illustration of the operation of the device of Figure 14; Fig. 16 shows a modification of the sampling process according to the invention, wherein separate burnout elements or burnout electrodes are used to produce parts of a zigzag separating track and a mechanical time setting and monitoring device for the continuous movement of the burnout parts into the working position and back; Figure 17 is a top plan view of the paper strip and a burnout electrode as shown in Figure 16; FIG. 18 shows a modification of the device according to FIG. 16 for burning out and simultaneously winding a paper strip to form a capacitor with twice the paper dielectric thickness between the two layers of the capacitor; Fig. 19 shows another device according to Fig. I6 using fixed burnout elements and electrical timing and checking devices in the form of rotating contacts or continuators and wherein the patterned strip is simultaneously wound into a capacitor; Fig. 20 shows a modified, embodiment of the device of Fig. 19, wherein a perforated control strip and corresponding contact parts are used for the timing of the burnout current pulses; Fig. Zi shows a perforated control strip for use in connection with the device according to Fig. 2o; Fig. 22 shows a modified sampling device: wherein a perforated control strip of a different shape than that shown in Fig. Ei is used; Figure 23 shows this modified control strip suitable for use in the device of Figure 22; Fig. 24 shows a modified sampling device in which burnout elements or electrodes are used (which are successively brought into working position and back again by means of electrical control devices; Figs. 25 and 26 are side and elevational views of another sampling device, with a pair of burnout rollers with a Z-shaped pattern are used according to the invention; Figs. 27 and 28 show a side view and a top view of a combined pattern and capacitor winding device in which fixed burn-out electrodes are used and burn-out current controls are provided with the aid of rotating switches allow the simultaneous production of a plurality of capacitors; Figs. 29 and 30 show further variations of the electrode pattern: r on the dielectric strip, where the electrode surfaces of opposite polarity, which are opposite each other in the wound units, have such a length that they one Partial or a whole revolution correspond, and at the same time the electrode surfaces (fields) are divided into partial fields. Fig. 29 shows a pattern for a single-layer capacitor and Fig. 3o a pattern for a two-layer capacitor; Alb. 31 and 32 show cross-sections: wound capacitors with patterned stripes according to: Figs. 29 and 30; Figure 33 shows a cross-section through a wound capacitor in which: the electrodes correspond to a full circumference of the coil; Figure 34 illustrates schematically the improvement according to the invention to produce transverse spacings of constant width in connection with the patterning process in which the strip to be burned out has a variable speed.

With the devices according to the invention, as can be seen from the following Description becomes apparent, the distances between the successive, transverse Any burn-out traces lying around during the firing process or during the demetallization can be set. According to one of these proposals, the device can be selected from a plurality of burn-out or stripping electrodes or parts that are consecutive on: the strip to be patterned: bznv. its metal layer at certain intervals: act, means being provided to adjust said distances according to the requirements adjust, e.g. B. in accordance with the increase in the circumference of the capacitor winding during winding. In particular, the device can contain burnout elements, the cross wires, ribs or rolls across the length of the metallized strip included, through which the successive transverse tracks that the occupancy spring form, burned out or removed from - the metal coating, and longitudinal wires, - ribs or rollers parallel to the length of the dielectric.strip, through the longitudinal strips, which run parallel to the edges of the dielectric strip are produced, so d: ate a continuous, zigzag-shaped, unmetallized track through pulls the entire metallized band through. These various burnout elements, can be brought into action one after the other in such a way that two longitudinal tracks in opposite directions Direction start from the two ends of a transverse track on the dielectric film and that these longitudinal strips are connected to the corresponding ends of the next transverse strip unite.

In such an arrangement, each burnout element can be made from a segmented or shoe-shaped electrode or a roller that has an approximately Z-shaped Pattern carries, with the end pieces of the Z the. Burn out longitudinal stripes during the connecting intermediate piece burns out the transverse strip.

According to another arrangement, the burnout electrodes can be made from a Large number of cross wires or dusts? Or. -roles exist that .secutive the transverse tracks burn out while a different number of rods, wires, coils or the like. So arranged, and, comes into action, that the longitudinal tracks burned out will. Each longitudinal track expediently has a distance from the adjacent longitudinal edge the metallized assignment, so that a continuous! Zigzag stripes completely within the metallized. Areas of the strip are created.

The time intervals between two consecutive burnouts can be set in .der device according to the invention by the Contact times of the burnout electrodes with the metallized strips and / or the Sets the switch-on times of the electric current for the burn-out electrodes. So can e.g. B. at a constant speed of the strip to be burned out a relative movement between the burnout electrodes and the metallized strip are generated in the longitudinal direction, the time intervals between the switch-on times of the electric current. for the burn-out electrodes or between the successive ones Contacts of these electrodes with the strip can be adjusted. Possibly can also determine the relative speed between the burn-out electrodes and the strip in des-sen. The longitudinal direction can be changed and means applied by means of which the burn-out electrodes be supplied with power one after the other or in z. B. constant time intervals with : be brought into contact with the strip.

The invention can be implemented in various ways. To the Various means can be used to carry out the invention. So z. B. the Bernusterun: gsgerät in which the desired pattern is created on the strip will have two or more burnout electrodes, e.g. B. in the form of a curved Shoe or a segment,: the engraved pattern or digl. in form of right-angled Z bear. The main or middle phalanx of the Z is then in the right Angles transverse to the curved surface of the segment, and, the two in general shorter end links then run in opposite directions from the middle piece as seen along the curved boundary of the segment or shoe. The distance between these two end links is: thereby slightly less than the width of the Metal coating on the dielectric strip from which the capacitor is made will.

The burnout electrodes can consist of segments of one and the same burnout wheel or can be parts of two or more burnout wheels or rollers. The electrodes are successively brought into working connection with the metal coating in such a way that the first segment burns out a track across the length of the strip, although it is expedient to ensure that this track is shorter than the width of the metal coating on the dielectric film and is arranged in such a way that a metallization strip still remains on the dielectric layer at both ends of the transverse track. The burned-out longitudinal strips form continuations of the burned-out transverse track, but extend in opposite directions when viewed from the transverse track, so that the track burned out of the metal layer has approximately the shape of a right-angled Z. The second burnout electrode repeats this Z-shaped pattern, but in such a way that the first longitudinal strip formed by this electrode is a continuation of the second longitudinal strip formed by the first electrode. A third burn-out electrode (or the re-inserted first burn-out element) acts on the strip, the first longitudinal track formed by the third electrode in turn being a continuation of the second longitudinal track formed by the second electrode, etc. This shape calls for a continuous, right-angled one , metal-free zigzag track on the dielectric film within the two edges of the metal covering, whereby, as desired, a large number of mutually isolated metal surfaces (fields) are created, which are electrically separated from each other in the direction of the strip length. The edge part of the covering, which is formed in this way along one edge of the dielectric film, remains in electrical contact with every second metallic field of a covering, while the edge part of the covering, which is formed along the other edge .der dielectric film, with the Metal surfaces lying between these fields is in electrical connection.

When using a pair of burnout electrodes with Z-shaped patterns with the longitudinal stripe burned out through an end link of each Z-pattern the adjoining, previously burned-out longitudinal strip is a wide area mutual setting options between the successive burnouts .of the transverse tracks given; it just has to be ensured that the longitudinal tracks of the alternately produced by the two burn-out electrodes pass over. However, it is possible to expand this setting area even further, what is particularly important for the manufacture of capacitors of large dimensions and large Capacity is advantageous by using intermediate burnout electrodes in the form of segments, Rods or the like. Are provided and on the strip between the successive Burned out traces of the two Z-shaped sampling electrodes will. These intermediate electrodes then burn z. B. alternating longitudinal tracks in the Metal coating, the successive longitudinal tracks of the two Z-patterns with each other associate; Thus, metallic bridges can initially be found between these longitudinal tracks Stand.blei@ben, which are then burned out by the intermediate electrodes. There are So according to the invention means are provided to the burnout electrodes relative to to move the metallized paper strip and to control it in this way and timing that the distances between the successive transverse strips and thus the lengths of the individual fields of the occupancy continuously in accordance grow with the increase in the circumference of the capacitor winding, which emerges from the patterned Paper strips are to be manufactured. The length of these spaces and their increase can be set to different sizes according to the requirements at hand will.

According to another arrangement, the metallized strip can be in the longitudinal direction relative to the burnout electrodes are driven by means that have a bz «- adjustable in its transmission ratio. continuously changing Transmission with the cams actuating the burnout electrodes or the like. Are connected. The cams bring the burn-out electrodes one after the other into the working position metallized strips; each electrode is after completion of its work process z. B. automatically withdrawn by a retraction spring. That way you can get through Change in gear ratio the time between consecutive Contacts of the burnout elements with the paper can be set to a predetermined one Measure of the increase (or decrease) in the length of the successive occupancy fields to ensure and so ensure that each field is exactly the part you want the circumference of the wrap covered.

Instead of or in addition to the time control of the work process Further means may be provided for the burnout electrodes through the cam mechanism are made by appropriate time connection of the fuel electrodes with a Voltage source cause the transverse tracks to burn out at the desired intervals. Furthermore, instead of the constant longitudinal drive of the metallized strip the burn-out electrodes one after the other in the working position at the same time intervals be brought, e.g. B. by the cam mechanism and / or by the selection Connection to the voltage source, while the strip in the longitudinal direction with a Speed or is moved in steps that are continuously in accordance with the desired growth of the successive electrode surfaces (fields) grows or grows.

The burnout can also take place in the opposite direction along the Strips are made, d. H. in such a way that the length of the successive fields instead of growing continuously becomes smaller and smaller.

If the adjustable transmission gear and / or the means for the optional connection of the burn-out electrodes provides a sufficiently wide adjustment range relative to the continuous longitudinal speed of the strip is not a limit for the length of the metallized strip that will be patterned in this way can, given, because the length of the electrode surfaces (fields) can grow continuously and continuously. So the same facility is suitable for the production of capacitors of very different sizes and capacities, because the length of the electrode fields that can be produced is actually achieved by just one Adjustment range of the variable transmission gear is limited.

Instead of the segments producing the Z pattern, the transverse tracks and the two longitudinal tracks that are in opposite directions relative to the two ends of the transverse track extend, each through a special burn-out pin, roller or segment are formed, e.g. B. by running across the length of the strip Extending burnout electrode and two pointed pins with slightly rounded ones Ends moving parallel to the length of the strip as it burns out; the The last two pens can also be replaced by two small rollers Diameter and smaller width. Here, while one of these wheels or narrow Rolls brought into burn-out position with the metallized covering and / or on the voltage source is applied, a continuous longitudinal track burned out and, there this contact can be maintained as long as this is desired, the provision additional bridging elements made superfluous.

With such a device, namely two burnout wheels or narrow ones Rollers for the formation and shaping of the longitudinal tracks and a transverse burn-out cutting edge, one Cross roller or a cross segment for producing the cross track, which is the longitudinal tracks connects with each other, it is important when burning the cross track at the end of the immediate previous longitudinal track to avoid that two consecutive electrode surfaces remain connected and thereby the two rows of metallized surfaces (Fields), which form the assignment of opposite polarity, short-circuited will. The transverse track can, however, be burned out in such a way that it is immediately connected to the previous longitudinal tracks connected at a point before the end of the latter and that they are with the immediately following longitudinal track on the other longitudinal edge of the Strip behind the beginning of this following longitudinal lane is connected; with others Words, the accuracy of the length and position of the longitudinal track must be such that two such traces, which are mutually on the same longitudinal edge of the dielectric strip follow, do not merge; the length of the successive electrode surfaces (Fields), measured in the longitudinal direction of the strip, is then determined solely by the distances determined between the successive transverse tracks.

A sampling of this type, in which z. B. the longitudinal tracks the points, at which they are connected to the ends of the transverse tracks, protrude, offer the Another advantage that the metallized surfaces have the same polarity as the associated metallic longitudinal edge or with this metallic longitudinal strip over relatively narrow Connecting bridges are connected, causing a sharp increase in the short-circuit current is avoided if the entire capacitor charge is on one of the metallic surfaces punctures through the dielectric. This in turn makes the short-circuit current to it suitable for regenerating or burning out the metal around the puncture point, without destroying the dielectric or rendering the capacitor unusable.

Instead of using an adjustable transmission gear between the drive for the metallized paper strip and that for the mechanism To check the burnout electrodes, the burnout electrodes can be controlled by means of a perforated control strip made of paper or other flexible material will. The control strip can be perforated with longitudinal slots, the length of which is the consecutive working periods of the burn-out electrodes corresponding to the Burn out longitudinal tracks in the metallized covering and / or with a series of z. B. in the middle of the control strip arranged openings which the successive Corresponding horizontal stripes in the metal allocation. The burnout electrodes can either can be operated directly by means of tactile fingers, which pass through the slots and openings reach through the control strip (s), or indirectly through pneumatic, Electropneumatic or electromagnetic means that pass through the openings or Longitudinal slits of the control strip can be controlled.

In the case of indirect control, the control strip can be used instead of any of the longitudinal slots described above have two holes in the direction of the length of the strip are separated from each other; one hole controls the start of the work process the associated burnout electrode on the metallized strip and / or its Connection to the power source, the second opening, however, the lifting of the burnout element of the metallized paper strip or its disconnection from the voltage source. each burnout element can thus be used in the desired sequence and with the desired continuous Time intervals and durations for each successive electrode area, such as this grows in the continuous process, can be controlled, and in the same way Way, such as B. the types of typewriters and telegraphs through a punched tape selected and operated, which runs at high speed.

A plurality of control strips can be provided for this purpose, each of which is pierced in accordance with the dimensions and sizes of a desired capacitor. To make a metallized paper strip To sample a desired capacity, it is only necessary to select the suitable Select the control strip and run it together with the metallized strip to send the sampling machine.

However, it is evident that the thickness of the dielectric does not constitute a factor influencing the capacitance of the wound capacitor only in that the thickness is the radial distance between the successive Locations of the metallized covering are determined, but also in such a way that the Increase in the circumference of a winding layer of the strip compared to that of the previous one Location depends on this thickness. The increase in the lengths of a pair of adjacent ones Electrode areas must therefore correspond to the thickness of the metallized strip.

While with the use of patterning or burnout wheels for each Thickness of the metallized strip a special wheel is necessary to allow the Control by means of a perforated strip or corresponding controls of the burn-out element, as described above, an easy adaptation to metallized dielectric strips different thicknesses by simply changing the relative speeds between the control strip and the dielectric strip by setting accordingly the sampling machine. The dimensioning of the strips burned into the metal lining can easily be done in such a way that capacitors are very different Size produced by means of only one transmission gear in the same machine can be. The z. B. for certain dielectric thicknesses necessary different The speed levels of the transmission can be adjusted on the adjustment device of the transmission marked with the appropriate metalized paper strip thicknesses. That The transmission ratio of the transmission can be changed continuously, either by hand in accordance with the thickness of the dielectric strip as indicated above, or automatically in accordance with this thickness, during the metallized Paper strips move in or through the sampling machine at the same time. Evenly small changes in the thickness of the metallized strip will be so as a measure for determining the length of the electrode surfaces on the metallized Occupancy used. The capacitors produced in this way keep the prescribed Capacity with a significantly lower tolerance than those with a burnout wheel can be made with a fixed pattern, because in the latter case the length of the Electrode areas and their growth only to the mean of an average thickness of the paper strip correspond.

According to the further invention, the burnout of the pattern on the metallized occupancy can be connected with the winding process of the metallized Strip for the manufacture of the wound capacitor. The burnout elements can here brought into and out of the working position by electrical or mechanical means and / or tension applied by the mandrel on which the strip is wound, operated or by a feeler or a roller, which slides on the circumference of the roll, while a metallized, patterned Part of the dielectric strip wrapped and another metallized strip or another part of the strip that is being wound up is sampled, so that it is ready to be wound up. Control of burned out in this way Strip eliminates the need to measure the strip thickness because of a change Considered in the thickness necessary in the diameter or in the circumference of the coil and the burned-out track is dimensioned accordingly in this way.

If the metal sampling and burnout process is direct or indirectly through the winding mandrel of the capacitor, either mechanically or electrically Controlled is the range of sizes and types of capacitors that are on this way can be made by the same machine, practically unlimited. This eliminates the need to make expensive and complicated sampling wheels, each of which is only for the use of one capacitor size and / or for a specific one Thickness of the paper or dielectric strip is suitable.

There are many hundreds or thousands of different sizes and dimensions of capacitors are needed and required, obviously brings the use of a single sampling machine according to the invention for manufacture the different types of capacitors with great simplifications in operation, and the initial equipment investment and manufacturing cost are reduced; because the devices and methods according to the invention can Capacitors of any size or capacity desired through the use of either one Paper or dielectric strip can be made. The desired capacity will be obtained by the number of turns which are set or predetermined in a manner similar to that of automatic capacitor winding machines this and similar types is common.

When using a control strip, the distance can, if desired the holes in the. Stripes will be uniform, and the stripe can be passed through the sampling machine run at a progressively decreasing speed; this creates from from one end of the strip to the other, electrode surfaces continuously increasing in length. The change in speed of the control strip can also be obtained by Winding the control strip on an auxiliary mandrel of the same thickness as it is used or should be used for winding the metallized Strip.

The speed of the auxiliary mandrel is directly related to the speed at which the strip of metalized paper or dielectric is traversed through the sampling machine, so that the two either through a fixed or permanently adjustable transmission gears can be coupled with each other, the adjustability of the transmission gear serves to change the direction of adjustment adapt to changes in the thickness of the paper strip. It can be seen that a single punched control strip can be used to the Control of the sampling for any width of the metallized strip, so that wound capacitors of various axial lengths can be produced. Capacitors, the capacitance of which in the capacitor of the opposite width, d. H. across the length of the dielectric strip, the metallized electrode surfaces both assignments is proportional, can thus be punched by using the same Control strip can be produced.

Although it is mentioned in these explanations that the burnout electrodes are brought into contact with the metallized strips, this is in the present case Case to be understood more as an approach or as a discharge contact, less as a direct physical contact, although this too is not excluded is. To ensure that the strips of the metallized coverings are even burned away is a transition of small discharges and arcs between the metal layer and the burnout element are advantageous. A little separation of the Occupancy and the burnout elements is at least appropriate, with this separation by immediately lifting the burn-out element or by continuously burning it away the covering around the edges of the pattern of the burn-out element placed on the metal covering or around the point of mechanical contact of the burnout pin on the dielectric strip achieved and thereby maintain a small distance to maintain the arc -will. If necessary, the burnout element is in direct contact instead brought with the metallized occupancy and the then flowing current by sudden Withdrawal of the burnout element interrupted. A direct physical contact can also be avoided that a high voltage source, z. B. a DC voltage from about 400 to 600 volts, a permanent flashover or arc between the metallic coating and the burn-out element. From the following description the advantageous exemplary embodiments shown in the figures go further Details of the invention emerge. Fig. I shows a metalized strip of paper io with a zigzag-shaped insulating track i i, which can be removed or burned away the metal coverage is obtained by means of suitable electrodes. This track contains alternating longitudinal stripes i2a, i2b near one of the two edges of the stripe, which are connected to each other by transverse lanes i2c. In this way arise alternately Electrode areas (fields) 14 and 15, which are electrically metallized by continuous Strips or edge surfaces 16 and 17 are alternately connected to one another. the Lengths a1, b1, a2, b2, a3, etc. of the successive electrode surfaces grow gradually, as shown in the figure, in such a way that when the strip is rolled up on a core to form a wound capacitor, the Electrode surfaces are exactly opposite each other and the arc of the same winding angle cover in the capacitor winding, with the immediately successive surfaces 14 and 15 of opposite polarity correspond to each other and are common form the capacitance of the capacitor.

It is obvious that the length of the successive electrode surfaces both on the thickness of the dielectric strip and on the size or diameter of the capacitor depends.

The metallized strip according to Fig. 2 with the applied electrode pattern for the production of capacitors according to the invention differs from that Formation of the strip according to Fig. I in that the longitudinal tracks i2a, 12b extend beyond the corners of the transverse strips i2u; this is the connection ensured between the longitudinal and transverse tracks and a direct connection between the electrode surfaces of opposite polarity prevented. This training has with the result that relatively narrow conductive bridges or webs 13a, 13b alternate between the edge connection strips 16 and 17 and the electrode surfaces 14 and 15 of the two assignments arise. As a result, in the event of a breakdown or a short circuit of the capacitor, in particular one from just one Paper or dielectric layer made capacitor, too high a rise of the current between the electrodes of opposite polarity despite the full, lying at the short-circuit capacitor voltage is avoided, so that the Metal coverage in the vicinity of the short-circuit point or the fault in the capacitor can evaporate or be removed without the risk of destroying the dielectric, especially of paper, as can be seen from the following.

The well-known basic idea of the metallized paper capacitor (MP capacitor) consists of the electrical energy stored in the capacitor used to convert the thin metal layer applied to the dielectric film into the immediate vicinity of a fault or a breakpoint through the To evaporate short circuit current without destroying the paper insulation, and such a thing Sufficiently large isolation path between the assignments or electrodes in opposite directions To generate polarity. This self-healing effect or self-regeneration is particularly easy to carry out with very thin electrodes, which can be created by applying a thin metal coating directly onto the paper or another dielectric through a Evaporation or similar process are applied.

If the energy stored in the capacitor is large enough, as is the case with high-voltage capacitors or large capacities, the resulting large short-circuit current or the large amount of energy can lead to mechanical destruction of the paper or the dielectric. According to the invention, this disadvantage is avoided by the special shape of the electrodes, as shown in FIGS. 2 to q. Here, the electrode surfaces 1d., 15 with their associated edge connection strips 16 and 17 are connected by the relatively narrow metallic strips or bridges 13 "and i3b, in such a way that they act as a series resistor or fuse and thus a sudden high short-circuit current at one Prevent flaws or breakthroughs that would otherwise occur as a result of the electrical charge on the adjacent coatings or electrode surfaces.As a result, the thin metal layer near the flaw is easily evaporated without the risk of the paper being destroyed by the short-circuit current or the arc.

Fig. 3 and q. show electrode patterns of those shown in Fig. 2 Kind of forming capacitors with two or three interlayers of paper or dielectric between the opposing electrode surfaces 1q. and 15 of opposite polarity. In order to achieve this, there are alternating electrode areas or electrode pairs of the two assignments omitted or removed in such a way that when winding the metallized and patterned strip into one Capacitor a desired number of layers of paper or turns between two of each other opposing electrode surfaces of opposite polarity come to lie. The length of the spaces between the successive ones is accordingly Electrodes 1q. and 15 a multiple of the length of the electrode surfaces themselves, see above that the capacitor also has the desired multiple dielectric thickness between the Has assignments.

Fig. 5 shows schematically a patterning device according to the invention, in which only a single burn-out roller is used, which is provided with burn-out ribs or burn-out patterns for removing the metal coating on the metallized strip according to the invention. The metallized dielectric strip 20 is guided from a supply roll 2o11 over a deflection and contact roll 21 and over a suitably curved or arched carrier 22, which can either be fixed or preferably consists of a freely rotatable roller or roller made of metal or insulating material. The strip, the metal-coated surface of which is in the figure above, is pulled off the roll 2o11 at a constant speed by means of a suitable drive device which, for. B. od from a pair of friction rollers 24, 25 made of rubber. The like. And the strip 20 is detected from both sides. One of these roles, e.g. B. roller 24 is driven by a motor 30 , as indicated by the dash-dotted lines 3o11 in the figure, so that the strip slides under the burnout roller 23 at a constant speed. The strip can then be rolled up onto the supply roll 27, which is also driven by the motor 3o, after it has been guided over a further deflection roll 26. Since in such a device the strip moves at a constant speed while at the same time the diameter of the roll 27 on which the strip is wound is constantly increasing, a flexible coupling or a slip clutch 32 is provided between the motor 30 and the supply roll 27, as is customary in connection with similar strip winders, e.g. B. in the drive of imaging cameras with magnetic strips, recording or playback devices od. Like. The Ausbrennrolle 23 is operated by the motor 30 via a suitable adjustable speed translation 31 to a electrode or Ausbrennmuster on the strip 2o with steadily increasing distances between to get the transverse tracks, as shown in Figs. i to q. is shown. The formation of the burnout roller 23 is shown in more detail in FIGS. 6 and 7. It consists of a metal cylinder 40 which has a raised strip or pattern 41 on its circumference. The electrical power is supplied to the roller via the slip rings 34 and the grinding brush 35 from a suitable power source, e.g. B. a direct current generator 36, one pole of which is connected to the contact 35 via an electrical resistor 36a. The opposite pole of the generator 36 is electrically connected to the metal coating on the strip 2o via the contact roller 21, which for this purpose consists of metal and on which another sliding contact 37 slides. The distance between the surface of the strip 2o and the bump or rib 41 on the roller 40 is e.g. B. set so small that an electrical discharge between the metal coating and the rib 41 occurs. This discharge causes the metal coating to be de-metallized or burned out along the continuous zigzag track or pattern when the strip is fed past under the roller 23 at a constant speed.

In such a facility the clearances between the burned-in Cross tracks on the strip 2o depending on the relative movement or the relative Speed between the strip 2o and the peripheral speed of the roll 23. If the speed of the roller 23 is varied continuously, it also changes the distance between the transverse tracks to be burned in on the strip 2o continuously in a desired manner so that eventually an electrode pattern on the strip 2o is created, which is used for the production of wound capacitors of the desired size and capacity is appropriate. In particular, the roller 23 is at the beginning of the burnout process driven at a given initial speed giving the necessary distance between the transverse tracks of the pattern to be burned onto the metallized strip guaranteed. This initial speed depends on the initial diameter of the capacitor winding ab to be made from the strip; thereafter this speed decreases continuously and it arises a continuous increase in the Distance between the transverse tracks in the metal covering of the dielectric strip 2o pattern to be burned in, as shown in Figs. I to 4.

For a better understanding of these processes, reference is made to the illustration referenced in Fig. io, in which the abscissa or x-axis is the time t and the ordinate or Y-axis represents the speed s. The speed of the paper strip 2o is constant, as it is shown by the line sp, which is parallel to the x-axis runs, while the speed s ,. of the roll 23 continuously from an initial value decreases in such a way that a continuous decrease in the relative speed d, between the paper and the roll and a corresponding increase in the distances is achieved between the transverse tracks. It is obvious that with a smaller relative speed d "between paper and roll is the distance between the burned out horizontal stripes grows larger on paper, and vice versa.

The same procedure is followed if a burnout pattern of the type shown in Fig. 8 A type shown or a pattern for a two-layer capacitor with double Dielectric thickness according to Fig. 8 B is used, according to the electrode pattern according to Fig. 2 or 3.

The adjustable device 31 for speed control can obviously be designed in different ways. Thus, as FIG. 9 shows, the control can be carried out purely mechanically by using a pair of conical pulleys 43 and 44, of which the disk 44 is driven by a motor 3o and the disk 43 drives the burnout roller 23. The pulleys are connected via a drive belt 45, which is continuously adjusted parallel to the axes of the pulleys 43 and 4 by means of a sliding guide fork 46. In this way, the speed of the roller 23 is continuously changed relative to the speed of the motor 30 and thus to the speed of the paper strip 20 (see Fig. 5). The fork 46 guiding the belt is guided in any suitable manner, e.g. B. by means of a guide screw 48 which cooperates with a part 47 on the fork 46. This lead screw 48 is driven by the motor 30 via a transmission gear, which is shown in the illustration of a pair of spur gears 50 and 51 in a simple manner. Of course, this transmission gear can also contain other transmission gears, for. B. also work as a differential gear, or have other appropriate means for reducing the relatively high engine speed to a slow translational movement of the fork 46. Instead of the guide screw 48, a drying mechanism or equivalent means can be used to bring about a continuous change in the speed of the roller 23.

After the paper film is burned out or in the desired way is patterned, it can be rolled up onto the supply roll 27 (Fig. 5). if the latter is large enough to accommodate a plurality of lengths or sections of foil, which are suitable for the production of a larger number of capacitors, Means can be provided in the form of a revolution counter or the like an electrical or mechanical device, e.g. B. a cam, works together, which brings the adjustable transmission gear back to its starting position, as soon as that for the production of a single capacitor or capacitor section necessary pattern is applied to the corresponding length of the paper strip. This returns the device to its original position and is now to burn out another, to make a second capacitor or Capacitor section necessary pattern on the paper strip in the same way ready, etc. In a facility of this type, additional funds can be provided in the form of a additional burnout roller or a burnout electrode (Fig. 27 and 28) are provided be able to lay the metal over a desired length between successive ones Completely remove capacitor sections and make suitable long insulating strips at the beginning and end of the various lengths or sections of the paper strip for the individual capacitors or their sections.

When the burned-out paper strip is on a supply roll for later Used, it may be necessary to rewind the roll, before the capacitor starts winding. This wrapping can be avoided by changing the control device for the burnout elements accordingly, in such a way that at the beginning of the sampling one for the production of a Capacitor suitable strip section the distances between the insulating Cross tracks and thus the lengths of the electrode surfaces (fields) between them decrease continuously during the burnout process instead of, as described above, to gain weight. This has the consequence that the successive electrode surfaces when Winding the capacitor directly from the supply roll down in the desired Increase manner and result in a correct capacitor winding within the meaning of the invention, in which the individual electrode surfaces in the capacitor are in the correct position Wise face, provided, of course, that the timing of the Burnout currents have been carried out in the prescribed manner.

In the arrangement according to Fig. 5 this can easily be obtained by Reversal of the change in speed of the roller 23 in such a way that the speed the role grows from an initial value to a 'higher final value instead of, as in Fig. I o shown to decrease continuously.

The device according to Fig. Ii corresponds essentially to the device shown in Fig. 5. Only the constant speed drive of the strip 2o to burn out the longitudinal tracks on it, while the electrode 72 has a T-shape with a cutting edge running transversely to the strip 2o, which burns out the transverse tracks in the metallic coating of the strip 2o. The pins or electrodes 70, 71 and 72 are generally lifted from the paper strip by means of suitable return springs 70a, 7ia and 72a (Figs. 16 and 18) and are successively brought into working position on the paper strip by camshafts lob, 7ib, 72a, which open a common shaft are arranged and are driven by the motor 30 via an adjustable speed or transmission gear 31. The latter, as well as the constant speed propulsion device, is particularly similar to the corresponding device shown in FIG.

The camshafts lob, 7ib and 72b are provided with appropriately designated elevations or cams, the pin or the electrode 70 being raised first in order to burn out the first longitudinal track on one edge of the strip as the paper strip 2o slides under the electrode. The pin or the electrode 71 is lifted off by the camshaft 7i b before the electrode 7o is withdrawn from its working position, and so burns out the longitudinal strip along the other edge of the strip 2o. While the electrode 72 is lifted briefly by the associated camshaft 72b and then withdrawn again from its working position, in such a way that the transverse strip that is burned into the metallic coating of the strip 2o by the electrode 72 results in a pattern of the type it is shown in fig 2. The speed of the strip 20 and the shaft with the cam disks lob, 7ib, 72b and the distance between the electrodes 70, 71 and 72 can each be set and adjusted so that a suitable electrode pattern for the production of capacitors of the desired size or capacity is achieved .

To complete the electrical circuit for the burnout are the camshafts lob, 71b and 72b with a common slip ring and a sliding contact 73 provided, which is connected to one pole of the current source 36 via a resistor 3611 is connected, while the other pole of the power source 36 is connected to the contact roller 21 connected is.

Fig. 18 shows a device similar to Fig. 16, which differs from the latter in the design of the roller 72b. With this device, the electrode 72 which burns out the transverse track remains in its working position for a long time and in this way burns out a transverse track the width of a full electrode surface, so that a pattern, as shown in Fig. 3, is created which is suitable for the production of a two-layer capacitor is, in which there are two dielectric film thicknesses between the electrode surfaces. In the device according to Fig. 18, the dielectric strip, in particular the paper strip 2o, is wound directly onto a mandrel to form the finished capacitor 65 by the winding motor 3o, which saves a constant drive of the dielectric strip 2o and a variable transmission gear for controlling the burnout elements. The speed of the paper strip increases during its winding onto the mandrel to the capacitor unit 65 and has the effect that the transverse tracks have the appropriate spacing for the production of the capacitor 65 and that the actuation of the cams lob, 7ib, 72b in particular is independent of the paper thickness, such as easy to understand from the foregoing. In order to obtain suitable dimensions of the tracks burned out by the electrodes 70, 71 and 72 and to actuate these electrodes in the desired manner at the correct time interval from one another, a speed transmission or transmission gear 74 is between the mandrel or the drive motor 30 and the control cams lob, 7ib and 72b arranged.

Devices according to Fig. 16, in which the speed of the Paper strip is constant, have the advantage that the width of the transverse track is about the length of the paper strip can be kept constant while changing the relative speed between the burnout electrodes and the paper strip the width of the transverse track can change, especially with large capacitors Capacity or large diameter.

Fig. 19 shows a modified arrangement of the type shown in Fig. 16 in which the burnout electrodes 70, 71 and 72 are arranged at a fixed distance from the paper strip and an electrical discharge is established between them and the paper strip or the covering by applying a suitable one high voltage is created and in which the successive actuation or the burnout of the longitudinal and transverse tracks is controlled by a multiple switch or a switching device that is driven by the winding motor. For this purpose, for example, as shown in the figure, three rotating commutators 75, 76 and 77, which are arranged on a common shaft and are indirectly or directly driven in a suitable manner by the mandrel or the winding motor, as shown schematically in the figure by the dash-dotted line is indicated. On the commutators slide contacts or brushes 75a, 76a and 77a, which are connected to one pole of the generator 36 via the series resistor 36a. The commutators are provided with insulating portions or segments 75c, 76` or 77 ° and conductive portions 75d provided 76d and 77 ". The electrodes 70, 7 1 and 72 are the insulating each having a Kommutatorausgang connected 75e by further sliding contact means 76e, 77e. and conductive portions of the commutators are arranged in such a way that, as shown in the figure, the circuit for the burn-out electrodes 2q., 25 and the slip or slip clutch 32 are omitted in succession the motor drawn past 30 with a continuously increasing speed s (Fig. 12) under the Ausbrennrolle 23, since the diameter increases continuously on the roller 27 during winding of the strip. in this case, the adjustable up gear 31 is referred to and adjusted so that the rate of Roll 23 continuously decreases from an initial value s ", so that a continuous decrease d he relative speed d between the roller 23 and the paper and the film 2o is achieved, to the exact same extent as has been explained with reference to the preceding devices.

As an example, Fig. 13 shows a variable electric drive to control the speed of the burnout roller instead of the mechanical speed control as shown in the previous figures. In this device the paper strip is driven by an electric motor 30 in the same way as before, this motor being fed by a network 55 which drives a further auxiliary motor 56, preferably a direct current motor, via an adjustable resistor 57 to adjust the speed. This resistor is advantageously in series with the field winding of the shunt motor 56. It is thereby suitable for a continuous speed adjustment of the motor in the desired manner. The motor 56 drives the burnout roller 23, and a reduction gear 6o, 61, which is driven by the motor 3o and corresponds to the gear 50, 5 z of FIG. 9, serves to actuate the speed control resistor 57 via a suitable connection or coupling 62. This means results in a variable relative speed between the burnout roller and the paper strip, in particular in the same way as shown in Figs.

A simplified version is shown in Fig. 4 .. After the paper strip 2o has slipped under the sampling device 23, 41, it is immediately and continuously wound onto a mandrel to form a finished capacitor 65, with the sampling and winding of the capacitor in a single operation are executed. Here, the paper strip moves again with a continuously increasing speed s, (Fig. R5) when the capacitor is wound up, the constant speed s ,. the roller 23, which is driven directly or indirectly through the winding mandrel, brings about a relative speed change d, (Fig. 1 5) , in such a way that the distances between the transverse tracks burned into the metallic covering of the strip are just the necessary distance, in order to correctly wind up the capacitor 65 in accordance with the invention.

In facilities according to Fig. 1q. depend on the distances between the transverse tracks of the zigzag pattern in the assignment of the strip 2o in the same way from the diameter or the peripheral speed of the roller 23 or the dimensions of the burn-out ribs ¢ i depend on it, since the speed of the strip of the simultaneous to the roller 65 wound strip grows continuously. With a suitable pattern on the burnout roller So the electrode pattern produced in this way has such dimensions that the individual Electrode surfaces of opposite polarity are mutually in the capacitor 65 exactly opposite, as has already been stated above. However, it is possible a device for adjusting the speed or an adjustable transmission gear to be provided between the winding mandrel and the burn-out roller or corresponding control means, in order to achieve the desired result within the meaning of the invention.

As stated above, the facilities and procedures are in accordance with Fig. 1q., In which the sampling is controlled directly or indirectly is determined by the mandrel or the motor, both the length and the thickness of the Paper strip does not affect, so that these facilities and methods for Manufacture of various sizes or types of capacitors are suitable, so that by the same machine practically any different sizes or types can be made of capacitors.

In the facilities explained above, there are burnout or sampling means Shown in the form of a scroll having a full repetition pattern or burnout sets (see e.g. 41 in Figs. 7, 8A and 8B). The increasing distances between the transverse tracks in the metallic coating of the strip are hereby a variable relative speed between the burnout agent and that to be patterned Received strips of paper. According to a further modification of the invention, how already stated above, several separate, z. B. three or more burnout electrodes or parts provided, which either by in a certain time sequence a mechanical control device is moved to and from its working position withdrawn or by suitable contact means, one after the other can be controlled, connected to a voltage source in order to successively and to burn out transverse tracks in the metal covering of the paper strip, which together create a continuous zigzag pattern. How it works is described in more detail below explained.

A simple setup of this kind, with a strip of paper with is driven at a constant speed is shown in Figs. In the latter three sliding electrodes 70, 71 and 72 are shown which are to be burned out of the desired tracks in the metal covering are arranged separately and fixed Have distances from each other. The electrodes 70, 71 each consist of a pin with rounded tips and are particularly perpendicular to the surface of the 70 71, 72 close, in such a chronological order that the longitudinal and transverse tracks are burned out in the same way as that of the facilities according to Figs. 16 to 18 by the mechanical monitoring and control devices is achieved.

In the device according to Fig. 19 the burned-out strip of paper wound up again directly to the capacitor unit 65, so that a constant Drive for the paper and a variable drive device for the commutators is saved. The distances between electrodes 70, 71 and 72 and the speed the drive of the commutators 75, 76 and 77 and / or the relative position of the conductive and non-conductive sections on these commutators is so arranged and adjusted that the desired electrode pattern for the manufacture of the capacitor winding 65 arises. However, it is possible, and this is part of the present invention, modify the device so that the strip of paper at a constant speed is driven and the commutators by means of a variable speed drive controlled or vice versa, as shown in the previous devices is.

Instead of rotating commutators (as in Fig. I9) another appropriately timed contact mechanism provided according to the invention be. One such is shown in Fig.2o and 21, in which the rotating commutators the device of Fig. 19 have been replaced by an endless insulating control strip 8o, which is continuously driven via a pair of pin wheels or guide rollers 81, 82 will. The control strip 8o is provided with slits or holes Boa, 8o6, 8oc, each of which is scanned by a suitable sliding contact or sensors 83, 84, 85 placed on one side of the strip. On the other hand of the strip 8o a common electrode or electrode plate 86 is provided, in such a way that the burnout currents for the electrodes 70, 71 and 72 successively can be closed in the desired manner, as was the case with the rotating ones Contact means has been explained. In the drawing are the grinding brushes or contacts 83, 84, 85 offset along the strip 8o for the purpose of better representation arranged drawn. Instead, these contacts can be arranged in a row across the Strips be arranged.

In the device according to Fig. 2o the paper strip 2o is again wound directly to the capacitor coil or the capacitor unit 65, after leaving the sampling facility, during the endless control strip 8o driven directly or indirectly by the winding mandrel or the motor 3o will. The openings on the strip 8o, which by means of the sprockets 81, 82 the continuous rows of holes sod is driven in a similar manner without slipping, how it z. B. is the case with cinema equipment, form a constant repetition pattern. The variable time intervals between the burnout currents are hereby defined by the increasing speed of the paper strip 2o causes it to go to the winding unit 65 is rolled up, but the device @ can also be made so that the Paper strip is driven at a constant speed and repeats the pattern on the control strip 8o moves at a variable speed in order to to achieve desired burnout pattern on the strip, this strip being either wound directly to the capacitor on the winding mandrel or on a supply roll can be.

In a modified device, several punched control strips can be used can be used, each of which for a capacitor type or capacitor size is provided. These strips have those for these different capacitors corresponding perforations; in other words, the perforations on the strip correspond each with a pattern suitable for a particular capacitor, one of the number of control strips corresponding to the desired number of capacitor types or sizes is provided. The strips can and can be small in width and size optionally placed in the sampling device or removed from it, to achieve the various capacitor types and sizes desired.

In a facility as shown in Figures 22 and 23, the control strips 8o wound from a supply roll 87 onto a take-up roll 88, at the same time and synchronously with the winding of the paper strip on the Roller 27. The rollers 27 and 88 are driven jointly by the motor 3o. A supply roll can be used for smaller capacitors or capacitor devices and the control strip wound on it several repeating patterns of a certain length, each of which is suitable for making a single winding capacitor of a certain type. The entire control strip on the Supply roll is then in z. B. equal distances with the same perforations or samples provided with one strip several capacitors of the desired size or to create capacity. Instead of a punched tape and an immediate one Contact control, the control strip can also have a printed on it Pattern, the control currents by photoelectric scanning or similar scanning means can be generated in a known manner.

Fig. 24 shows another modification with a perforated control strip for the timing and control of the burnout electrodes 70, 71 and 72. These Electrodes are in their normal position from the metal-covered surface of the paper lifted off and are brought into the working position electrically by means of one of the Coils 9o, 9i and 92. These coils are powered by a suitable power source, e.g. B. a battery 93, by means of of control contacts 83, 84 and 85 in operated in a manner as will be understood from the foregoing. The burnout electrodes 70, 71 and 72 are in turn connected to one pole of the voltage source 36 via the series resistor 36a connected by means of a flexible conductor 90a, 91a and 92.7, while the the other pole of the voltage source with the metal coating on the paper strip over the contact roller 21 in a similar manner to that described above, connected is. Here, too, the paper strip can again run at a constant speed and the speed of the control strip for the burnout pattern is changed, or the paper strip and the control strip become relatively changeable Speed appropriately driven.

In Figures 25 and 26 a modified sampling device of the type according to Figure 5 is shown, which is particularly suitable for the sampling of dielectric strips for the production of capacitors with large dimensions or large diameters. For this purpose, two burn-out rollers 95, 96 are provided, each of which has Z-shaped ribs or elevations 95 " and 96a on its circumference. These two Z-patterns 95a and 96a form the successive transverse tracks with the adjacent parts of the longitudinal tracks, e.g. each one half of the entire zigzag pattern that is to be burned in on the dielectric strip. The parts 95 and 96 in turn are connected to a voltage source via suitable contacts or timing means of the type shown, the longitudinal track formed by the one roller being overlaps to different degrees with the adjacent longitudinal track, which is formed by the other roller, so that a continuous zigzag track is formed, as can be understood from the above 98 should be provided to ensure that the longitudinal tracks also merge continuously into one another for the largest dimensions or types of the desired capacitors.

Figures 27 and 28 show a perfect sampling and capacitor winding machine for the simultaneous manufacture of a plurality of capacitor units or sections made of a metallized dielectric strip wound on a supply roll.

The metallized paper strip 100 is relatively large in width is supplied by a supply roll iooa that is carried by an upright arm or carrier ioi a base plate 1o2 is driven, taken. The stripe ioo initially slides over a contact roller 103 and is then passed over a support that forms the a rotating shaft or roller 1o5, according to the role 22 in the earlier illustrations.

In the device shown, the burnout electrodes are as rotating Discs or rollers 1o6, 1o7 and 1o8 formed, each of which has a longitudinal or cross track of the pattern. Instead, however, also without the The essential idea of the invention is abandoned, fixed electrodes are used as shown in the previous figures. After the sampling process the paper strip slides over another burn-out roller i io, which extends over the the entire width of the strip and serves to provide insulating start and end surfaces on the strip to manufacture, these insulating surfaces being used for the manufacture Separate the necessary lengths on the strip for a capacitor unit. The strip then slides over another roller i i i to rotating cutting knives 112, which cut the strip into several sub-strips, three of which are in the Figure are shown, which then simultaneously lead to a corresponding number of Winding capacitor units i i4a, i 14b and 114c on a common mandrel 113 be wound up.

The mandrel 113 is driven by suitable means, e.g. B. an electric motor (not shown) via a gear 115 that also a Chain transmission 116 or the like and a number of commutators or rotating contact means 117 ″, 117 b and 117 c actuated. The drive 116 serves to set the burn-out electrodes 1o6, 167, 1o8 and iio and the cutting wheels 112 by means of suitable drive wheels io6d, 107d, io8d, iiod and i 12d.

The electrode 1o6 consists of three burnout wheels io6a, io6b and io6e, which are arranged so that they follow the longitudinal tracks near one edge of the Burn out the partial strips that form the capacitors afterwards. You are about that Sliding contact io6e with the brush or the pick-up contact of the commutator 117a tied together.

Similarly, the electrode 107 consists of the three burnout wheels 107a, 107b and 107e, which are arranged to burn out the longitudinal tracks near the other edge of the sub-strips from which the capacitors are subsequently formed, and those with the pick-up brush of the Commutator 117c are connected via sliding contact 107e. The electrode 108, which is used to burn out the transverse tracks on the metallized dielectric strip, is provided with suitable conductive sections 108a, 108b and 108c and insulating spacers between the electrically interconnected sections. It is connected to the output of the commutator 117b via the sliding contact device io8e. The input contacts of the commutators I l7 ", 117b and 117c are connected to one pole of the direct current source 12o via a series resistor i 2 ia, i2 ib and i 2 ie, while the burnout wheel i io is connected to the same pole of the current source 12o via the other Resistor 122, a contact or a switching means 123 and the sliding contact device iioe. The contact roller 103 is connected to the other pole of the power source 12o via the sliding contact 103a in order to close the circuit for the burnout current.

With a suitable arrangement and design of the commutators i I7a, I I7b and 117c and the Ausbrennelektroden or rollers IO6, 107 and io8 and, if necessary, an adjustable speed ratio between the mandrel 113 and the axis of the commutator i I7a, 117 b, I 17c Obtain the appropriate electrode pattern on the partial strip in such a way that the electrode surfaces of opposite polarity on each strip are exactly opposite one another in the final wound capacitor 114a, 114.b and 114c, respectively. In order to make the device suitable for different capacitor sizes and paper thicknesses and / or to adapt to other set conditions or wishes, the distance between the burnout electrodes io6, 107 and io8 and the speed of the commutators 117a, II7b and 117c are made adjustable. The switch 123 can be operated either manually or automatically, e.g. B. od by means of a revolution counter, a mother transported by a spindle. Like. Which are driven by the winding mandrel. These devices cause the leading and trailing ends to be burned out on the paper strip or its sections, each section of which is suitable for the manufacture of a capacitor of the desired size or capacity.

In the foregoing it is assumed that the electrode surfaces are opposite Polarity extends over the full or almost the full circumference of a layer of the capacitor winding extend, with a certain subdivision of the total occupancy into one Number of partial occupancies or partial areas (fields) results. If a larger subdivision is desired or another goal is to be achieved, sampling can be done according to a modification of the invention are carried out in such a way that the electrode surfaces only cover part of a circumference of the capacitor winding extend and face each other there in this part in the condenser unit.

A patterned strip of this type is shown in Fig. 29. This Strip differs from that of Fig. 2 in that the entire length a ,, a2, a3, etc. of an adjacent pair of the electrode surfaces 14, 15 den cover the entire circumference of the condenser unit. Here is the consequence of the positive and negative areas or the connection of the electrode areas with the edge strip 16 and 17 reversed from winding to winding, i.e. H. in other words, the adjacent ones Pairs of electrode surfaces, partial electrode fields of the same polarity (14 or 15), are each connected to the same edge strip in the manner shown in Fig. 29.

The same process and the same design of the pattern for capacitors with two dielectric layers between the layers is shown in Fig. 30 . In this case, the areas i9, which cover a full revolution of the capacitor winding, are each burned out between two partial areas of the same polarity. If necessary, similar patterns can be produced with electrode surfaces that only cover a part of a winding circumference that is smaller than about half the winding circumference, or areas that are larger than one circumference of a winding layer can be burned out by a corresponding number of dielectric layers in the to get finished capacitor between its assignments.

Electrode patterns of the type described above have a more complicated one Shape than the pattern described above and are preferably by means of a Control strip produced, which is formed according to the desired electrode shape and operates in the manner described above.

Fig.31 shows schematically a capacitor as it can be wound up a strip according to Fig. 29 is obtained on a mandrel to form a winding unit. It can be seen from it that the positive and negative electrode surfaces 14. and 15 (see the dashed lines) each extend over half a circumference of the successive Extend winding layers and so form the capacitor. Fig. 32 also shows one Capacitor, as it is made by winding a strip according to Fig. 3o, the burned-out metal-free areas or windings i9 between the partial electrode areas possesses, so that a capacitor with a two-layer dielectric is formed.

For comparison, Fig. 33 shows a capacitor unit with electrode surfaces, which cover a full extent of a winding layer, as he would by winding one Strip according to Fig. 2 is produced.

In facilities of the type described, in which the relative speed between the dielectric strip (paper strip) and the burnout control means is used to measure the distances between the transverse tracks burned into the assignments to change, and in which in particular the means of control directly or indirectly is actuated by the winding mandrel, the distances between the transverse tracks grow accordingly the increase in the roll diameter, especially when large rolls or Capacities are to be established. This is based on the fact that the speed of the paper strip that is moved under the fixed electrode with the diameter of the roll increases, which also increases the width (in the longitudinal direction of the dielectric strip measured) of the burned-out transverse strip increases when the burnout current is switched on for a constant time. To this change to keep the widths of the transverse tracks within limits or to automatically adjust the width of the Bringing tracks to a constant value can be the length or the duration of the Burnout currents or the corresponding control means are changed depending on on the diameter of the roll, in such a way that the duration the Current switch-on is shortened accordingly as the diameter of the coil increases becomes (or vice versa).

An arrangement of this type is shown in Figure 34 in which the paper strip is wound into a capacitor unit 65 in a manner similar to that shown earlier. The control of the burnout of the cross track is effected in the embodiment shown by a cam wheel 13o which is driven indirectly or directly by the winding mandrel 65 and has a cam 131 which has a resilient member, e.g. B. a leaf spring 132 or the like., Actuated, which is used to operate a microswitch 133 of known construction. This microswitch 133 monitors the burnout current for the formation of the cross-track in a manner shown and described with reference to the previous figures. The control member 132 is additionally held by a roller or a grinder on the arm 134 of an angle lever which is mounted at 135 and has a further arm 136. This arm 136 also has a roller or a grinder at its free end which rests on the circumference of the roll 65. Thus, if the diameter of the coil 65 increases during the winding of the capacitor, the member 132 is depressed by the arm 13o, so that a reduction in the time during which the microswitch is operated is achieved. The duration of the burn-out current also decreases accordingly and thus continuously counteracts the increase in the width of the transverse track when the capacitor is wound up.

The term zigzag track as used in the present description and is used many times in the claims, indicates the isolating track, which is burned out on the metal coating of the strip, and serves in a short time Shape to mark a metal-free track, which is made up of longitudinal and transverse sections, in particular of the same width (see Figs. 2 and 29), as well as of tracks, in which the sections running transversely to the longitudinal direction of the dielectric strip have a width which is equal to the length or a multiple of the length of the electrode surfaces is (Fig. 3, 4 and 30). From the latter capacitors are made that a plurality of dielectric layers in the manner described in detail above between the two assignments have; in other words, the insulating zigzag The track forms alternating electrode surfaces of opposite polarity, which correspond to one another in the fully wound capacitor and are separated from one another are either by a narrow transverse track, leaving a capacitor with only one Dielectric layer arises between the assignments, or through insulating, transversely demetallized surfaces running in the longitudinal direction of the dielectric strip, which correspond to the length or a multiple of the length of the electrode surface, for the purpose of producing a capacitor with several dielectric layers between the Electrodes. The metallized paper strip can be made by depositing a suitable : Metal can be produced, e.g. B. of zinc, cadmium, aluminum or the like., Namely expediently by means of an evaporation process or in another suitable one Way. The paper is expediently covered with a very thin layer of varnish, to increase the breakdown voltage and a more uniform dielectric thickness to obtain. Furthermore, the metallized paper can be subjected to a burnout process in which it has one or more metal cylinders with its metallized Page slides using a voltage, preferably in pulse form or short Power surges to fault or short circuits in the manner described below to remove. This burnout process can be combined with sampling and / or the winding process and a final burnout process with the finished Condenser unit is made. In this way you can use metallized paper strips particularly large widths can be treated by first performing an initial burnout process are subjected, then sampled and then in partial strips of the same or different Width can be cut open to finally wound up into several capacitors to become. This makes mass production of MP capacitors very different Size and very different dimensions in a simple manner at low cost enables.

Used in arrangements where fixed burnout electrodes be like this z. As shown in Figs. 1g, 2o and 22, it can be difficult be able to continuously maintain the electrical discharges causing the burnout, that of small solid areas or points of the stationary electrodes or else start from electrodes in the form of small wheels or rollers. To these difficulties to avoid, according to the further invention, said points are rounded or rounded Corners of the electrodes kept in an oscillating motion with a small amplitude, so that they move continuously to the metallized surface of the paper strip move away from it, for example with a stroke of around 25 ccm and a sufficiently high one Frequency for a more even arc or a continuous discharge for demetallization or for burning out the corresponding metal surfaces.

When using such a small oscillation movement of the electrodes the uncertainty caused by small inaccuracies or changes can be eliminated the distance between the electrodes and the metal layer, in particular when the voltage is alternately switched to the electrode and switched off will. If the electrodes are stationary, this can be achieved in a simple manner are made by resilient mounting of the electrodes on separate supports or on one common resilient carrier, this or this carrier of the vibration of a electromechanical vibrator or one exposed to a similar agent become, the z. B. by the mains voltage with a frequency of about 5o or 6o Hz is driven. This network frequency is high enough to ensure continuous maintenance to ensure the burnout currents or the burnout discharges. When moving Electrodes can be used as shown in Figures 16, 18 and 24 the oscillatory movement are generated or superimposed by the electrodes the resilient mounting in a similar, easy-to-understand way.

According to a simple device of the latter type, the burnout electrodes are 70, 7 i and 72, as shown in Figs. I9, 20 and 22, on a common insulating support or such a plate, the latter being resilient is held by a rubber plate or equivalent. The insulating plate carries one or two magnetizable iron parts that act as fittings from a magnetic core can be operated. The latter carries a winding which is drawn from the network e.g. B. is operated with 5o or 6o Hz. This makes the electrodes a continuous Subjected to vibration with amplitudes that vary in size by the rubber or the other resilient holding means are determined.

In the foregoing the invention has been described with reference to various graphic representations and arrangements. However, it is not limited to this. The facilities can be modified and modified in many ways, e.g. B. by Replacement of parts and equipment as shown in the drawings. By such modifications will become the basic concept of the present invention, such as it is not dealt with in the preceding and in the following claims leaving. So the description and drawings are broader only to be understood as embodiments of the invention.

Claims (7)

PATENT CLAIMS: i. Foil suitable for the production of electrical wound capacitors, consisting of a dielectric tape provided with very thin, electrically separated metallic coatings, in particular made of paper or plastic, characterized in that two metallic coatings extending along the foil are applied to only one side of the dielectric foil, are evaporated in particular at low pressure, which by a lying between them on the surface of the film, for. B. meandering, sinusoidal or zigzag-shaped unmetallized, especially narrow strips (track) are electrically isolated from each other. 2. Foil according to claim i, characterized in that at least one of the two assignments consists of several fields (i4, i5), for. B. in rectangular or approximately sinusoidal shape, which are only electrically connected to one another by a narrow metalized strip (i6, 17) on the surface of the film. 3. Film according to claim 2, characterized characterized in that the fields of an occupancy are spaced from one edge of the film leave free while the narrow strips connecting them on the other edge of the film runs. 4. film with two assignments according to claim i, 2 or 3, characterized in that that the fields of both assignments alternate in the longitudinal direction of the film and that the fields of each of the two assignments are preferably narrow by one and metallized strips running along one edge of the film with one another are connected. 5. Foil according to one of claims i to 4, characterized in that that one or more, preferably all fields of an occupancy over their entire length are connected to the narrow strip connecting them (Fig. i). 6. Slide after one of claims i to 5, characterized in that one or more, preferably all fields of an assignment with only part of their entire length with the one connecting them narrow strips are connected (Fig. 2, 3, 4, 29 and 30). 7. Foil according to claim 6, characterized in that the fields of an occupancy with the narrow strips connecting them are connected by narrow occupancy parts, which are preferably removed from the beginning and end of each field, in particular in the middle between the beginning and end of each field ( Fig. 2, 3, 4, 29 and 30). B. film according to one of claims i to 7, characterized in that the length of the successive fields of an occupancy increases or decreases in the longitudinal direction of the film. G. Foil according to claim 8, characterized in that the lengths of the successive fields of both coverings increase or decrease jointly in the same longitudinal direction of the foil. ok Foil according to claim 8 or 9, characterized in that at least one field, preferably all fields of one of the two occupancies are longer (or shorter) than the respective immediately preceding field of the other occupancy, but shorter (or longer) than the immediately preceding field the following field of the other assignment. i i. Foil according to one of claims i to io, characterized in that the distance between two successive fields of an occupancy continuously increases or decreases and that its length is at least slightly greater than one of the two fields or as an integral multiple of the length of this field. i2. Foil according to claim ii, characterized in that one or more fields of the other occupancy are arranged between two consecutive, in particular different sized fields of one occupancy, which are in particular shorter than one field of the other occupancy, but longer than the other field of this occupancy. 13. Film according to one of claims i to 12, characterized in that a field of an occupancy is divided into two or more subfields which are only connected to one another via the common narrow strip, and that the subfields either close to one another (Fig. 29) or are arranged at a large distance from one another, at least one partial field length (Fig. 30). 14 .. Winding capacitor manufactured using in particular only one film according to one of claims i to 13. 15. Winding capacitor according to claim 1q., Characterized in that an occupancy has a strip preferably running over the entire length of the occupancy at an edge of the dielectric film, which is provided on its edge with a metallic layer applied, in particular sprayed, to the end faces of the capacitor ( front contact) is. 16. wound capacitor according to claim 15, characterized in that both assignments are end-to-end contact on one end face of the capacitor winding. 17. wound capacitor according to claim 1q., 15 or 16, characterized in that in it the fields of one, in particular both assignments and the distances between the fields of the individual assignments from the inside of the winding to the outer winding layers increasing in length. 18. wound capacitor according to one of claims 14 to 17, characterized in that the length of the fields of the assignments corresponds at most approximately to the length of a winding layer (Fig.33), possibly approximately equal to an integral part of a winding layer (Fig.31, 32). i9. Winding capacitor according to one of claims 14 to 18, characterized in that the length of the fields of both assignments and / or the distances between the assignment fields is dimensioned so that the assignment fields correspond approximately to the arc length of the same winding angle in the different winding layers, i.e. with different winding diameters (Fig. 34 32, 33). 2o. Winding capacitor according to one of Claims 14 to 19, characterized in that successive, preferably immediately successive fields of both coverings are alternately at the same winding angles, so that they are separated by at least one (Fig. 34-33), if necessary several layers of dielectric film (Fig. 32) Coils face each other. 2r. Method and device for producing a film according to one of Claims i to 13, in particular for a wound capacitor according to one of Claims 14 to 2o, characterized in that the dielectric film is first provided with a coherent metal layer on one side, in particular vapor-deposited, and that from this metal layer the metal-free strip or strips separating the coverings or their fields are produced by removing, in particular burning out, the corresponding metal layer parts. 22. The method and device according to claim 21, characterized in that one or more electrodes are passed over the metallized side of the dielectric film, which burn out the desired pattern on the film by a current that burns out the metal under or in the vicinity of the electrode the electrode and the occupancy flows. 23. The method and device according to claim 2i or 22, characterized in that the dielectric film is continuously passed under one or more burn-out electrodes. 2q .. Method and device according to claim 21, 22 or 23, characterized in that the electrodes, which have the shape of the pattern to be burned out, as required for a capacitor, are driven so that the pattern moves at the same speed as the dielectric film moves. 25. The method and device according to claim 21, 22 or 23, characterized in that the electrodes, which have only one: pattern, in particular a rectangular Z-pattern, which is essentially repeated within a pattern required for a capacitor (see FIG. 41, in particular Fig. 6, 7, 8) are driven in such a way that a relative speed, in particular a continuously increasing or decreasing relative speed, is present between the pattern and the dielectric film (Fig. 5, 11, 1q., 25) - : 26. Method and device according to Claim 25, characterized in that the speed of the dielectric strip is kept constant, but the speed of the electrodes continuously increases or decreases (Fig. Io). #. Method and device according to Claim 25, characterized in that the speed of the electrodes is kept constant, whereas the speed of the dielectric film strip increases or decreases continuously (Fig. 15). 28. The method and device according to claim 25, characterized in that both the speed of the electrodes and that of the dielectric strip continuously increases or decreases (Fig. 12). 29. Modification of the method according to one of claims 25 to 28, in particular for burning out a rectangular pattern composed of longitudinal and transverse tracks, characterized in that instead of a moving along the dielectric strip electrode pattern, one or more fixed or only approximately perpendicular to the surface of the Electrodes moved by the dielectric film are used and set in action relative to the speed of the dielectric film passing under them in such a way that the desired, especially rectangular pattern is burned out on the film (Fig. 16, 18, 19, 20, 22, a4). 30. The method and device according to claim 29, characterized in that the timing of the electrodes is carried out by cam wheels (Fig. 16, 18) or contact disks (Fig. I9). 31. The method and device according to claim 29, characterized in that the timing of the electrodes is carried out by means of punched tape, in particular from a punched tape (Fig. 2o, 22, 24). 32. The method and device according to one of claims 25 to 31, in particular for burning out a rectangular pattern composed of longitudinal and transverse tracks, characterized in that one electrode is provided for each of the longitudinal and transverse tracks (see e.g. Fig. 17) . 33. The method and device according to one of claims 25 to 3a, characterized in that, in addition to the electrodes which burn out the longitudinal tracks attached to the transverse track, further additional electrodes are provided (e.g. 97) which contain the parts not burned out by the main electrodes burn out the longitudinal traces of the desired pattern (see e.g. Fig. 25, 26). 34. The method and device according to one of claims 21 to 33, characterized in that the electrodes are moved mechanically and / or electrically into the working position for the dielectric strip for the purpose of burning out, moved back out of it and / or electrically connected to the voltage source supplying the burnout current. 35. The method and device according to one of claims 21 to 34, characterized in that the dielectric strip is first wound onto a supply roll after it has been burned out (Fig. Ii). 36. The method and device according to claim 35, characterized in that in the production of a pattern required for a capacitor, the length of the successively burnt-out electrode fields continuously decreases. 37. The method and device according to one of claims 21 to 34, characterized in that the dielectric strip is immediately wound up to form the desired capacitor unit after it has been burned out (see e.g. Fig. 14). 38. The method and device according to one of claims 21 to 37, characterized in that the control of the relative speed between the dielectric strip and the electrode pattern or the control device controlling the burn-out process of the electrodes as a function of the size or the number of turns of the roll wound after the burn-out process, in particular the capacitor winding takes place. 39. The method and device according to one of claims 21 to 38, characterized by the use of a transmission gear that can be adjusted according to the desired relative speed between a drive motor rotating at constant speed and the film or the electrodes or the control means (punched tape, Cam or contact disks or the like). 40. The method and device according to one of claims 21 to 39, characterized in that the dielectric strip, the electrodes or the electrode control device are driven by a motor, the speed of which continuously increases or decreases during the burnout (e.g. Fig. 13). 41. The method and device according to one of claims 21 to 40, characterized in that for burning out a plurality of appropriately identical patterns required for one capacitor each on only one dielectric strip, the relative speed after burning out a pattern required for a capacitor is initially to a new one for the initial value required is brought to the following pattern, and that only then is the burn-out of this following pattern started. 42. The method and device according to one of claims 21 to 41, characterized in that at the beginning and / or end of a pattern required for a capacitor, in particular between two patterns required for each capacitor, a broad strip suitably covering the entire surface of the dielectric film is burned out. 43. The method and device according to one of claims 21 to 42, characterized in that the dielectric strip (20) and the burnout electrode or the burnout electrodes are driven or controlled by an in particular common drive device (24, 25, 30, 56), wherein the variable relative speed between the dielectric strip and the burn-out electrode (s) or the control device for these electrodes is obtained by a transmission gear between the drive device and the dielectric strip or the electrodes or their control device that can be fixed depending on the thickness of the dielectric strip The transmission ratio is continuously changed during the burn-out process according to the dielectric thickness and the length of the applied pattern (Fig. 5, 1 3, 1 6). 44. The method and device according to claim 43, characterized in that the transmission gear is continuously adjusted as a function of the thickness of the dielectric by a device which scans the thickness of the dielectric. 45. The method and device according to claim 43 or 44, characterized in that the transmission gear is set as a function of the length of the pattern applied by a device measuring this length. 46. The method and device according to claim 43, 44 or 45, characterized in that the gear ratio of the gear is set according to the thickness of the dielectric and the length of the applied pattern by a device which continuously extends the circumference of a roll formed by the patterned dielectric strip, in particular the capacitor winding, scans or measures, e.g. B. counts the rotation of the roll or the winding mandrel. 47. The method and device according to claim 43, characterized in that in order to achieve the desired variable relative speed, the speed of the dielectric strip is changed by placing it on a roller driven at constant speed, in particular a capacitor winding (65) on a winding mandrel or the like. is wound up (Fig. ri, 14, 18, z9, 2o, 22, 24), expediently at a constant speed of the electrodes or their control device (Fig. 14, z8, 19, 20). 48. The method and device according to one of claims 21 to 47 with a control device, in particular a perforated strip for controlling the burn-out electrodes, characterized in that the control device is driven at a defined speed by causing a slip between its drive (e.g. 30 ) and the establishment is avoided (e.g. by sod in Fig. 2i). 49. The method and device according to claim 48, characterized in that the control device, which is designed as a perforated, in particular endless belt, is provided with perforations or slots at such a distance or length and is driven at such a speed relative to the dielectric strip that the desired pattern is created. 5o. Method and device according to one of Claims 2a to 49, characterized in that a transverse track is burned out by an electrode extending transversely to the longitudinal direction of the dielectric film by briefly bringing it into the working position and / or applying a burnout voltage, the duration of the working position or the applied burnout voltage can be adjusted so that the width of the transverse track remains constant despite the variable relative speed between the dielectric and the burnout electrode or its control device (Fig. 34). 51. The method and device according to one of claims 2z to 5o, characterized in that a dielectric strip of great width is provided with several adjacent capacitor patterns and is then cut into strips each containing a pattern (Fig. 27, 28). 52. The method and device according to claim 5 r, characterized in that the metalized edge strips (i6, 17) connecting the electrode fields of the capacitor patterns lying next to one another remain as a continuous metalized surface, ie without a burned-out longitudinal track lying between them, they form a continuous metalized surface, and that the wide dielectric strip (zoo) is cut into partial strips within these areas, so that each partial strip has a metallized edge strip (z6, 17) on each of its two edges. 53. The method and device according to one of claims 2x to 52, characterized by the use of burn-out electrodes which, during the burn-out process of a track, are set in a reciprocating, in particular oscillating, movement perpendicular to the dielectric surface. 54. The method and device according to one of claims 21 to 53, characterized by the use of a dielectric film made of paper or the like, which is provided with a layer of lacquer that increases the dielectric strength and / or smoothes the dielectric film before it is metallized, and preferably after its metallization, is exposed to a burn-out process in particular in a work process with burning out the pattern and / or possibly with winding up the capacitor.