Patent GB-524120-A (GB)
Title: Improvements in or relating to winding machines for winding together in a roll ribbons of metallic foil separated by ribbons of insulating material
IPC: H01G13/02
Filed: 1939-01-23
Abstract: 524,120. Winding strip-material. DEUTSCHMANN, T. C. Jan. 23, 1939, No. 2278. Convention date, Oct. 14, 1938. [Class 100 (i)] A winding machine for winding into a roll,. ribbons of metal foil separated by ribbons of insulating material comprises mandrels operating in succession and adapted to draw the ribbons continuously from a source of supply and so arranged that as the ribbons are served from one mandrel they are simultaneously gripped by another mandrel to continue uninterruptedly the drawing of the ribbons from the supply. As shown in Fig. 1, two similar winding mechanisms performing similar cycles of operation at a phase difference of 180 degrees, are arranged one at each end of a base 20. These mechanisms comprise platforms 24, 25 movable transversely on rails 22, 23 and actuated in one direction by cams 31, 33 and in the other direction by springs that for platform 25 being shown at 34, and platforms 28, 29 movable longitudinally on rails 26 on the platforms 24, 25 and carrying slotted winding mandrels 76, 76a and associated ribbon guiding and controlling rods. The platform 28 is provided with spaced vertical plates 30, 36 which support fixed projecting rods 1, 2, 3, 4, 6, 7, 8, and are provided with slots 91, 95, 96 through which project rods 5, 9,10 capable of a certain vertical movement. Mounted on the plate 36 so as to be able to slide vertically towards and from' each other are two members 56, 56', Fig. 2, carrying respectively four rods 63 ... 66 and four rods 67 ... 70. The members also carry co-operating knife members 82, 83 and the lower member is provided with a glue pot 181. The platform 29 carries similar rods and members 92, 97, similar to the members 56, 56<SP>1</SP>. The foil strips 52, 45 and paper strips 42, 48, 49, 55 pass from supply rolls between pairs of guide plates 41, Figs. 2 and 11. These figures show the winding taking place on the mandrel 76 of platform 28. At the commencement -of a cycle of operations, the platforms 24, 28 are in the position shown in Fig. 1. A crank pin driven by an endless powerdriven chain 121 then engages a slotted part 103 of the platform 28 to move this platform to the centre of the machine so that the rods 1 ... 10 engage between the guide plates 41 as shown at the left of Fig. 11. At this stage the plates 56, 56<SP>1</SP> are held apart by springs so that the rods 63 ... 66 are above the top guide 41 and the rods 67 ... 70 are below the bottom guide as indicated at 65<SP>1</SP>, 66', 69<SP>1</SP>, 70<SP>1</SP> in Fig. 11, the rods 63, 64, 67, 68 in this initial position not being shown in this figure. The mandrel 76 at the same time embraces by its slot the ribbons which have previously been brought together by the other winding mechanism which at this stage is still winding the ribbons on its mandrel. The platform 24 is then moved forwards by its cam 31 at the same. speed as the platform 25 and after the knife carried by the members 97, 92 has severed the webs, the mandrel 76 is rotated to wind the ribbons upon itself. As the platform 24 continues to move forward rollers 74, 75, Fig. 2, on the members 56, 56' are operated by fixed cams 59, 60, Figs. 1, 2, at the centre of the machine to move the members together. The upward movement of the member 56 also causes upward movement of the rods 9, 10 and, just prior to the cutting of the webs a cam 56, Fig. 1, acts to move the rod 5 downwardly. The positions of the rods are now as shown at the right of Fig. 11, and the vertical movements of the rods have formed loops of greater lengths in the ribbons of paper than in the ribbons of foil so that upon completion of the winding after severing, which occurs at the point 84, the ends of the foil are completely covered by paper and a greater length of paper is formed by the rod 5 so that the ribbon 42 to which glue is applied by the glue pot 181 can completely cover the ends of the other ribbons. The loops forming the end of the new roll are also of different lengths so that the foil ends are overlapped by the paper. Prior to the cutting operation, the winding mechanism on the plaform 29 begins its cycle of operations, the platform moving to the centre of the machine so that its mandrel 76a engages the ribbons between the rods 63, 64 as shown in Fig. 11. During the major portion of the winding operation, the mandrel is driven by sprocket gearing 115, 116 driven by a sprocket gear 118 meshing with the lower run of chain 134 driven from the chain 121, the speed of the chain 134 and the shape of the cam 31 being co-ordinated to provide constant winding tension. After the ribbons are severed, the sprocket 118 passes beyond the chain 134 and the winding is completed by the engagement of a friction wheel 171 geared to the mandrel with a friction cone 170 driven by a motor 166. The cutting of the ribbons is effected by the rollers 74, 75 engaging projections 79, 78 on the ends of the cams 59, 60 to press the members 56, 56<SP>1</SP> nearer together and this movement also causes the glueing roller 182 to be pressed against the lowest paper strip. On further movement of the platform 24, the mandrel engages a spring pressed abutment 178 to cause the outer strip to adhere to the body of the roll after which the platform 28 is withdrawn to the end of the base 20 causing the roll to be stripped from the mandrel by a collar 258 carried by a rod 259 on a support fixed to the platform 24. The completed roll passes down a shoot 282. The platform 24 is then returned by its spring to the back of the base 20 and in this movement a disc 104 geared to the mandrel 76 so as to make a quarter turn for one revolution of the mandrel, engages by an adjacent pair of four pins 105 with a bar 110 which thus ensures that the mandrel is turned so that its slot is horizontal in readiness for re-engagement with the ribbons.