GB1183431A - Device for Infeed of Cord Layers of Pneumatic Vehicle Tyres to a Tyre Production Machine - Google Patents

Abstract

1,183,431. Feeding webs. A. HERBERT, and M. GUHR, [trading as LEONHARD HERBERT MASCHINENFABRIK]. 1 April, 1968 [1 April, 1967], No. 15577/68. Heading B8R. [Also in Division B7] Apparatus for feeding plies to a tyre building drum 10, Fig. 1, comprises a reel 28 on which a web of rubberized cord fabric is wound, a platform 6 comprising at least one endless belt for supporting and moving the web towards the tyre building drum, a motor for driving the belt(s), a cutting device 11 for cutting the web to form a ply, the cutting device being adjustable longitudinally of the platform so that a ply of any desired length may be obtained, and a reel 29 for winding up a companion web interleaved with the cord web. The apparatus may comprise a further operative combination of reels, platform, motor and cutting device so that two plies may be fed to the tyre building drum. Reel and guide arrangement.-The reels 28, 29 may be mounted on a carriage 35. The web from reel 28 is guided over rollers 31a, 31b, 31c to form a festoon 49 and over plates 34 and rollers 33, 141a, 1416-to the edge of platform 6. Platform.-Each platform 6, 7 may comprise an alternate arrangement of endless belts 14a-14d and fixed plates 15a-15d, Fig. 2. The former may be adjusted to a level lower than the latter, and the latter may be provided with air nozzles in order that the cord web may be floated on the platform. Cutting device.-A blade carriage 57, Fig. 2, is movable by motor 61 along tubes 56, 56<SP>1</SP> fastened to stands 58, the latter being displaceable in slots 54 located in portions 50, 50<SP>1</SP>. The latter may be displaced longitudinally of the platform along rods 51, 52. The blade may be double-edged, the edges being sickle-shaped, and it may be pivotally mounted on the carriage. Operation.-After insertion of carriage 35 with reels 28, 29 thereon into the apparatus, companion web 44 is separated from cord web 43 and fastened to reel 29 and cord web 43 is fed through the device to the edge of platform 6. Motor 16 is operated to move the cord web along the platform, the motor being stopped automatically when the leading edge of the web interrupts a light beam near the other edge of the platform. Motor 61 is then automatically started to move the blade carriage across the web, the web being cut so as to form a ply which is drawn off. Another operating cycle is then initiated. The length of cord web unwound from reel 28 is determined by the length of festoon 49, which is detected by means of light beams. Thus, when the festoon reaches a predetermined minimum length, the reel drive 125 is switched on, and when it reaches a predetermined maximum length, the drive is switched off.