Device for treating thin sheets by spark discharge.

p0001The invention relates to a housed in a box apparatus for processing sheet-like layers in the form of passing through the device tracks by means of a spark discharge between a designed as roller electrode and an axially parallel thereto arranged counter electrode, wherein the one electrode carried by a cover of the box is.

p0002Such a device is known from German utility model 7,328,009. With this the contact protection device serving the lid is hinged by a hinge on the box, so that the purpose of introducing a web of cover can be tilted into an inclined position. This arrangement has proven to be disadvantageous that for the opening of the box by the Hochkippendes lid upwards a clearance must exist, which is not always available.

p0003The invention has the object to customize the box so that the space required for the opening of the box space virtually no consequence. According to the invention this is achieved in that the other electrode is mounted in an enclosed by the cover, supported by rails drawer which can be moved out under the cover of the box in the longitudinal direction of the webs. In this design of the box, the lid is an immovable part of the box. The opening of the box is made by moving out of the drawer, which can be moved out because of their lengthwise direction of the webs corresponding thrust motion in a region out of the box, which is anyway traversed by the tracks, so that the required for the outward movement of the drawer space readily Available. In addition, there is the advantage that when the sliding movement of the drawer then no gravity to overcome is, if this displacement movement is horizontal, which can be assumed that for the normal case.

p0004Advantageously, one sees in the box 2 for double-sided machining serving rollers each with a counter electrode before, one of which is carried by the cover and the other of the drawer, both rollers are offset in the thrust direction of the drawer up to today. In this arrangement, the tracks run inside the box in the manner of an S-curve, where they each span a roller partially. If now this Umspannung due corresponding supply and removal of the tracks selected so as to provide a sufficiently inclined guide on the inlet and outlet side, then by the pressure exerted by a light rail train a force exerted on the drawer, which is reset the box draws.

p0005To allow only low frictional forces exposed displacement of the drawer one, forms the rails expedient than telescopic guides.

p0006On the box you can attach at least one guide roller in order to achieve each favorable angle for the supply and carrying away of the tracks.

p0007In the figures, an embodiment of the invention is shown. Show it<ul><li>1, the device cut in side view, with an inserted drawer</li><li>Figure 2 shows the same device in the same position with out moving drawer</li><li>Figure 3 is rotated a view of the arrangement according to Figure 1 by 90 °, in view toward the front of the drawer, the guide roller shown in Figures 1 and 2 is omitted.</li></ul>

p0008The device shown in Figure 1 consists of the case 1 with its lid 2 and the bottom 3. The bottom 3 is the box 1 attached which consists of the two U-rails 4 and 5 frame. The box 1 contains the drawer 6, 7 and 8 challenges by the manner shown in Figure 3 telescopic rails out of the box 1 and in this hineinbewegbar is (withdrawn position, see Figure 2).

p0009According to Figure 1 contains the box 1 has two pairs of electrodes, namely, in a pair of the roller 9 and serving as the counter electrode knife electrode 10 as well as in the other pair of the roller 11 and formed as a knife electrode counter electrode 12. These electrodes are in non intcressierender here manner to connected a high voltage source, so that each is formed between the electrodes 9 and 10 or 11 and 12, a spark discharge in a known manner. The rollers 9 and 11 in each case have the insulating jacket 13 and 14 respectively. In addition, the rollers 9 and 11 are respectively provided with end faces limiting plates 15 and 16, respectively, which prevent a lateral migration of the webs to be processed. The knife electrodes 10 and 12 are mounted on the insulating support 17 and 18 on the cover 2 or to the drawer. 6

p0010As seen in Figure 1 a made of a plastic film, dash-dotted path 19 is approximately S-shaped course be assessed in the case of forming a spark discharge between the electrodes 9 and 10 from the one side and between the electrodes 11 and 12 of its other side is being processed. The illustrated apparatus thus permits processing of both sides. It should be noted, however, that for the case of one side only desired processing, the apparatus shown in Figure 1 may be limited to only the arrangement of an electrode pair, for example on the roller 9 and the knife electrode 10th

p0011In the illustrated apparatus the roller 9 and the knife electrode 12 are attached to the drawer 6, while the knife electrode 10 and the roller 11 are arranged on the lid second Consequently move when pulling out the drawer 6 of the box 1, the roller 9 and the knife electrode 12 (refer to Figure 2), which results in a sufficient clearance, by then a path can easily be threaded.

p0012The pulled-out position of the drawer 6 is, as I said, shown in FIG. 2 As can be seen, projecting the drawer 6 with its front panel 20 of the box 1 out, so the front panel 20 from the front panel 21 of the box 1 is set accordingly. After threading a path the drawer 6 is then pushed back into the normal position of Figure 1 shown in the result of the displacement of the two rollers 9 and 11 in the thrust direction of the drawer 6, the S-shaped guide rail 19 results.

p0013For the largely low-friction reciprocating movement of the drawer 6, as has been said, the telescopic guides shown in Figure 3 7 and 8 in charge who are known as elements with ball guides available. The execution of the reciprocating movement of the drawer 6 is effected here by means of the hydraulically or pneumatically betätig th piston-cylinder unit 22, is moved at the activation of the plunger 23 when the drawer 6 is fixed by the pin 24th The piston-cylinder unit 22 is fixed by means of the bracket 25 to the U-bar. 5

p0014Since toxic gases in the processing of plastic films by means of a spark discharge in circumstances which device is provided with a cover attached to the 2 Absaugstützen 26 to which in a known manner a suction device not shown here, is connected. via the suction nozzle 26 air is sucked into the interior of box 1, through the inlet 27 and the outlet 28. In order that in the region of the inlet 27 and the outlet 28 does not become too column, the cover 2 with the covers 29 and 30 and the drawer is provided with the covers 31 and 32, the inwardly protrude from the respective walls of the lid 2 and the tray 6 in the direction of the roller concerned 9 and 11, respectively and opposed to only leave a relatively small gap. The covers 29, 30 and 31, 32 are made of plastic, but can also be made of metal against a person lying on the ground electrode because the box is 1 anyway connected to ground. If the lid 2 is arranged in the suction guard 26 is not sufficient for a complete extraction because of the interior of the box 1 aufteilenden track 19, an appropriate suction nozzle is to be provided also in the bottom third

p0015As shown in Figures 1 and 2, the guide roller 34 is on the drawer 6 via support arms 33 are attached, which ensures that the in-run in the device web 19 freely passes through the inlet 27, wherein the arrangement of the deflection roller 34 also for is worried that the wrap angle of the roller 9 remains constant. In addition, the guide roller in the withdrawn position of the drawer 6 holds 34 over an escorted rail of the drawer 6 away, so that the web can not be damaged by any edges on the drawer. 6 On the side of the outlet 28 there is normally always a constant wrap angle for the roller 11, as on this page a winding roller for the finished material is usually arranged.

p0016As Figure 2 clearly shows the space required for the opening of the case 1 in a direction from which extends normally one to edit track 19 of the device is supplied, so that here the required space is available readily.

p0017Figure 3 shows the device shown in Figure 1 with the omission of the guide roller 34. It can be seen here, the roller 9 with the two outer plates 15, the suspension of the roller 9 is indicated in the drawer 6 by an axis symbolizing dot-dash centerline 35th The side mounting of the roller 9 is carried in the two support walls 36 and 37 which are attached to the drawer. 6 The lid 2 also has corresponding support walls, namely the support walls 38 and 39 which are secured to the cover 2, and are used for storage of non visible in Figure 3 roller eleventh In Figure 3, nor the position of the piston-cylinder unit 22 is shown with which the reciprocating movement of the drawer 6 is effected.

p0018It should be noted that it may be in to edit film-like layers in the form of tracks not only plastic films but also for. Example by plastic-coated metal foils. Similarly, metal foils or metallized plastic films to be treated, in which case, however, the metal foil or metallized film is to be directed through a metal roller, the opposite is a provided with a plastic layer counter electrode. Finally it should be achieved