Patent GB-804436-A (GB)
Abstract: 804,436. Tube-making machines. GUSTIN-BACON MANUFACTURING CO. Inc. March 28, 1955 [May 17, 1954], No. 8927/55. Class 99(2). [Also in Group XL(b)] A machine for wrapping lengths of fibrous material about mandrels comprises an endless belt 22 extending around a plurality of rolls and adapted to form a mandrel-receiving pocket, and a mandrel-conveyer provided with a number of carriers and adapted to be moved in steps so as to carry mandrels to the belt for wrapping and from the belt after wrapping. As shown, a belt drive roll 24 is carried on a shaft 25 and a pair of movable rolls 28, 30 are, respectively, rotatably mounted on arms 36, 38 and 48, 50 fixed on shafts 40, 52, the belt being tensioned by a roll 56 slidably mounted by the journals 58 thereof on brackets 60. the journals being connected by flexible members 62 to pulleys 64 mounted on a shaft 66 carrying pulleys 74 from which are suspended weights 70 so that the shaft is biassed to tension the members 62. The effective length of the belt is adjusted by a roll 76 slidably mounted on brackets 78, 80, a pair of lead screws 84 being operated to move the roll to the desired position. A sprocket 90 carried on the shaft 25 is chaindriven via a chain 92 by a sprocket 94 mounted on the main drive shaft 96 coupled by a gear assembly 102 to a drive motor 98. The chain 92 also drives a sprocket 104 fixed on the driving member 106 of a clutch 108, that member being fixed on a shaft, rotatable in a bearing carried by the frame of the machine, and the driven member 110 of the clutch being fixed on an inlet conveyer drive shaft 112 carrying a sprocket 118 connected by a chain 120 to a sprocket 122 secured on a shaft 124 ; engagement of the clutch to drive the shaft 112 causes rotation of the shaft 124, Fixed on the latter are sprockets 130, 132 which drive mandrel conveyer chains 134, 136 riding around idler sprockets 138 carried on stub shafts 144 mounted at the upper ends of mandrel guide plates 150. A downwardly inclined supply rack 154 supports a number of mandrels 158 provided with journals 160 which, as the mandrels roll down the rack, are guided into slots 164 in the plates 150 and thence are received in recesses 168 in carrier blocks 166 spaced along the chains 134, 136. A pair of mandrel feed devices 170 each comprise a housing 172, Fig. 6, having a spring- biassed, reciproctaable plunger 174 formed with a depending projection 200. A pivoted lever 184 has one end thereof seated in a recess 190 of the plunger and the other end of the lever engages in a bore 194 in a slidable stop finger 196. When the plungers are urged to the left as seen in the Figure, the levers 184 force the fingers 196 into the recesses 198 and the journals of the mandrel next to be engaged by the blocks 166 are supported by the ends 173 of the plungers, the projections 200 being engaged by the blocks and moved inwardly to permit the journals to be supported by the blocks, simultaneously the fingers 196 being moved to the left by the levers 184 to prevent the next succeeding mandrel from passing the plungers when the mandrel which has just been dropped on to the conveyer chains is carried away to a mat-wrapping position ; during the latter operation, the plungers are moved to the left and the fingers 196 are retracted to permit the mandrel supported by the fingers to fall on to the projections 173. The chain 92 drives a sprocket 202 carried by the driving member 204 of a clutch 206 which member is fixed on a shaft 208 and drives through one revolution a driven member 214 on a shaft 216 mounting a pinion 220 driving a gear 222 fixed on a shaft 224 ; the latter carries a crank 228 pivotally secured to a link 232 pivoted on a crank 234 fixed to the shaft 52, that shaft mounting a gear 246 driving a gear 248 on the shaft 40. When the pinion 220 is driven through one revolution, gear 222 is driven through one-half a revolution, the arrangement being such that with the linkage in the position as shown in Fig. 3 the shafts 40, 52 are rotated to move the arms secured thereto to the open positon as shown in Fig. 4 ; the next revolution of the gear 220 in the same direction rotates the shafts to bring the arms to the closed position thereof as shown in Figs. 3 and 5. A mandrel upon which a mat has been wound is carried away from the machine by a horizontal conveyer which includes a pair of chains 254 on sprockets 255 rotatable on shafts 256 and extending rearwardly of the machine to engage drive sprockets 260 on a shaft 262, each chain being formed with spaced projections 264. A second conveyer comprises a pair of chains 266 which pass around sprockets 268 fixed on the shaft 262, idler sprockets 270, 276 on shafts 272, 278 and drive sprockets 284 on a shaft 286 driven by a motor. The upper runs of the chains are guided by angle-irons 292, and the chains are provided with spaced carriers 267 which engage the journals of the mandrels to carry the latter away from the chains 254. Mats 354 are conveyed to the wrapping position by a conveyer 356, and the machine includes a light source 352 associated with a photo-tube 350 for electrical control of the machine.