Patent GB-190929234-A (GB)
Title: Improvements in Machines for Wrapping Tyres and other Annular Bodies.
Inventor: LASKI ALBERT DE
IPC: B29D30/06
Filed: 1909-12-14
Granted: 1910-10-13
Abstract: 29,234. Laski, A. de, and Thropp, P. D. Dec. 14. Cores, covering by winding.-In a machine for wrapping a spiral canvas covering round a tyre preparatory to its being vulcanized, or for the like wrapping of other annular bodies, the tyre or other body to be wrapped rests upon, and is moved along during the wrapping operation by, three or more rollers 9, 10, which project slightly above the level of a table 3 and are rotated by bevel-gearing 14, 15, 20, 21, at the ends of a diagonal shaft 16, from a central shaft 23 driven by worm gearing 25, 26. The tyre &c. is pressed against the driven rollers 9, 10, by means of idle rollers 38, 39, carried at the extremities of arms 44, 45, depending from a head 47 on which the necessary pressure is applied. Lateral displacement of the rollers 38, 39, is prevented by anchoring them to guide-pins 48, 49, by means of arms 51 which embrace the pins. The pressure may be applied to the head 47 by means of a screw 54, Fig. 3, which engages a screwthreaded bushing 55 in a yoke-piece 4 mounted on the table 3, and compresses a spring 56 situated in a cavity in the head 47. Fluid pressure may be utilized as an interchangeable arrangement, in which case a cylinder 58, Fig. 5, is mounted on the top of the yoke 4, and the stem 60 of a piston 59 working in the cylinder is connected to the head 47 by a cup bearing-piece 62. Fluid is admitted into the cylinder 58 through the inlet 68, the rotary valve 69, and port 65, when it is desired to increase the pressure, the port 66, being then open to the atmosphere through the valve 70 and exhaust opening 77. When it is desired to diminish the pressure, the lever 75 is operated and the valves 69, 70 are turned so that fluid is admitted from the inlet 68 through the port 66 to the space below the piston, and the port 65 is simultaneously opened to the atmosphere through the exhaust opening 76. The wrapping- material is carried on a spool or bobbin 13 mounted on an annular ring 78 supported so as to be capable of rotation on rollers 102 in a circular race-way 79. This ring is rotated by ropes 110 arranged as return loops and driven from an overhead countershaft carried by a weighted lever. The raceway 79 is mounted upon a pedestal 80 mounted in a slide on a plate 81, so as to be adjustable in a direction parallel to the plane of the tyre or annular body to be wrapped. The plate 81 is also mounted upon a stem 82 sliding in vertical bearings 83, 84, and is carried by a lifting screw 85, so that the raceway 79 is adjustable in a direction transverse to the plane of the tyre &c. These adjustments allow the centre of the raceway to be moved to coincide with the centre of the tyre &c. A portion 103 of the ring can be emoved and the raceway 79 is provided with a permanent opening to allow the tyre &c. to be introduced into position. The tension on the wrapping-material is maintained constant by the use of a pivoted arm 138, Fig. 8, bearing on the surface of the material and connected to a brake band 134, the other end of which is connected to a piece sliding on a pin 136 and supported by a spring 137. The tyre &c. is kept in position on the table 3 by vertical guiderollers loosely mounted on vertical spindles, carried by blocks which are adjustable by a screw arrangement along radial slides in the table. One of the guide-pins 48 and one of the vertical spindles can be removed to allow the tyre &c. to be inserted.