Patent GB-860168-A (GB)
Title: Improvements in or relating to web winding machines
IPC: B65H19/22
Filed: 1957-07-18
Abstract: 860,168. Hydraulic apparatus. LANGSTON CO., S. M. July 18, 1957 [July 27, 1956], No. 22766/57. Class 69 (2). [Also in Group VIII and XVI] In a web slitting and rewinding machine (see Group XVI), a pump 221 delivers oil during a web threading operation, through a pipe 227 to a motor 7 which drives a winding drum 4, Fig. 1, not shown. A solenoid-operated relief valve 228 controls the torque of the motor 7. The motor 7 discharges oil to an electrically-operated valve 232 which when closed diverts oil to a valve 234 which allows oil to flow to a flow control valve 235 and to an electrically-operated valve 236, the setting of the valve 235 determining the maximum speed of the motor 7. Valve 236, when energized supplies oil from the valve 235 to the motor 8 which drives the winding drum 5, Fig. 1, not shown. The motor 8 discharges to motor 49 which drives the rider roller 9 pressing on the top of the roll being wound. The motor 49 discharges through an electrically operated relief valve 241 in open position to an oil reservoir 225. During slitting and rewinding, pump 221 delivers oil to the motor 7 which discharges through valve 232 to a manually-controlled speed control valve 247 ; a relief valve 248 limits the pressure in the pipe 231. Valve 247 discharges through valve 236 to the reservoir 225. Oil from pump 222 is supplied through valve 243 and check valve 246 to motor 105 which drives the slitting knives, not shown, the torque of the motor 105 being controlled by a valve 244. Oil from pump 223 is supplied through check valve 238 to the inlet of the motor 8 which discharges to the motor 49, the torque of the motors 8 and 49 being controlled by adjustment of the valve 239 by means of a manually adjustable valve 253. The speed of the motor 7 is determined by the setting of the valve 247. The directions of rotation of the motors 7, 8 and 49 may be reversed by solenoid-operated valves 295, 296 which reverse the direction of oil flow through pipes 297, 298 and 299, 300 respectively. The machine is braked by oil, from pump 222, being directed by solenoid-operated valve 243 through valve 245 to the motor 105 which is then driven at idling speed and back to the reservoir, while oil from the pump 221 is supplied at low pressure via a relief valve 228 to the motor 7 which discharges through valve 232, set to high pressure position, and valves 247, 236 to the reservoir. The motor is similarly braked by discharging through valve 241 set to high pressure position. The settings of valves 232, 241 are controlled simultaneously by a valve 254. The rider roller 9 is actuated upwardly and downwardly by cylinders 37 supplied with oil by a pump 224 through a relief valve 267, the setting of which may be adjusted manually by a control valve 268 or automatically by a control valve 269, depending on the setting of a four-way valve 271. Valve 269 is actuated by a cam 270 operated in the manner described in Specification 783,029. Cylinders 61, supplied with oil by the pump 224 through flow control valves 281, 282, 283 and 284, control the movement of carriages 57, 58, Fig. 1 (not shown), supporting a winding mandrel 6. Movement of these carriages is effected by varying the setting of a pressure control valve 286, Fig. 18A, either manually by a valve 287 or automatically by a cam-operated valve 288, depending on the setting of a valve 289. The cam 290 rotates in synchronism with movement of the rider roller 9, Fig. 1 (not shown), in response to the increasing diameter of the roll being wound. Cylinders 179 actuate arms, not shown, carrying a roller which effects ejection from the machine of completed rolls. The cylinders 179 are supplied with oil through valves 101, 102, 103, 104 and 105, the valve 101 being a solenoid-controlled valve, the pressure of oil supplied to the cylinders 179 being limited by the setting of the valve 267. Reference has been directed by the Comptroller to Specification 783,029.