Patent GB-770977-A (GB)
Title: Improvements in apparatus for storing and dispensing tacky sheet stock
IPC: B29D30/38
Filed: 1955-07-24
Abstract: 770,977. Bundling. UNITED STATES RUBBER CO. June 24, 1955 [July 8, 1954]. No. 18281/55. Class 94(1). [Also in Group XVI] Apparatus for storing and dispensing lengths of tacky sheet material such as rubber impregnated or coated fabrics used in the manufacture of tyres, belts &c., comprises a pair of rolls 29, 31 rotatably mounted in spaced relationship, a length of linen material 30 connected at its ends to the two rolls and adapted to be wound from one roll to the other and a third roll 48 rotatably mounted in parallel spaced relationship to the rolls 29, 31. and which is frictionally engaged by the linen material 30 ; both rolls 29, 31 are driven through slip clutches to maintain the linen 30 taut and stationary if the roll 48 is stationary and so that when the roll 48 is driven in either direction the linen is unwound from one of the rolls 29, 31 and wound on theother roll. By driving the roll 48 in a clockwise direction, Fig. 5, the tacky stock material S can be wound on the stock roll 29 with the linen 30 separating the convolutions. If now the drive of the roll 48 is reversed, the stock S is unwound for feeding to a tyre building drum C, Figs. 1 and 3, and the linen 30 rewound on the roller 31. A number of such units 12 can be mounted in a frame so that while one unit is winding up a length of stock S, another. is simultaneously dispensing it to the drum C. The roll 29 is rotatably mounted on bearings 33 ... 35, Fig. 6, on a shaft 32 and is pressed axially by adjustable springs 40 against a slip clutch 36 interposed between it a gearwheel 37. The roll 31 is similarly mounted on a shaft 32a with a slip-clutch 43 interposed between it and a gearwheel 44. the gear 44 meshing with the gear 37 and also with a gear 45, Fig. 5, coaxial with a driving gear 47, Fig. 1, for the rollers 29, 31. The shaft 49 of the roller 48 carries a driving gear 50. The shafts 32, 32a, 49 are mounted between side plates 38, 39, Fig. 6, by means of which the unit 12 can be mounted on a chain conveyer. Two such chain conveyers 10, 11 mounted on a frame 13 are shown in Fig. 1, each conveyer carrying a number of units 12. The conveyer 10 is situated adjacent to a loading station A so that the roll 29 of each unit can be wound, in turn, with stock S. Similarly, the conveyer 11 is at the discharge station B adjacent to the drum C so that the loaded rolls 29 in turn can be used for supplying stock to the drum. The frame 13 is mounted on a turn-table 14 operated by a motor 16, so that the positions of the conveyers can be reversed when one set of rolls 29 is exhausted and the other set is refilled. The conveyer 10 is driven from a motor 21, Fig. 3, to bring each unit in turn to operative position wherein the driving gear 47 of the rolls 29, 31 meshes with a gear 55 driven'from a motor 57. Also, the gear 50 of the roll 48 of the unit in the operative position, engages a gear 65 which can be driven alternatively from a motor 69 through a magnetic clutch 72 or through a gearchain 73, 79 including a magnetic clutch 81 from the shaft 74 of the drum C. Similar arrangements are provided for driving the units on the conveyer 11. In operation if, for example, the conveyer 10 is at the discharge station B, the motor 69 is first operated to feed stock from the roll 29 until the free end can be applied to the drum C. The motor 69 is then disconnected by actuation of the magnetic clutch 72 and the roll 48 connected to the drive of the drum C by operation of the clutch 81. When stock has been exhausted from all the units of conveyer 10, the turn-table 14 is rotated to bring the units of conveyer 11 to the discharge station B. Stock is now loaded on the units of conveyer 10 at station A by suitable operation of the motor 69. The diameters of the rolls 48 of successive units on a conveyer may be of increasing magnitude to compensate for the change in the peripheral speed of the drum C as the effective diameter builds up with the plies of stock S. Further the rolls 29, 31 instead of having intermeshing gears 37, 44, may be driven by separate motors or other suitable means.