Patent GB-478630-A (GB)
Title: Web renewing mechanism for printing machines
IPC: B65H19/18
Filed: 1936-07-18
Abstract: 478,630. Feeding webs. HOE & CO., Ltd., R. (Hinkel, O.) July 18, 1936, No. 22226/37. Divided out of 478,578 under which a Specification was laid open to inspection under Sect. 91 of the Acts, Feb. 1, 1937. [Class 100 (i)] Web-renewing mechanism for 'a printing-machine comprises a support for a running roll and a new roll, means for speeding up the new roll, a web-deflecting device for pressing the running web against the new roll, locking mechanism for holding the web - deflecting device against operation, control mechanism comprising two elements which when actuated together release the locking mechanism, one element being operated in each rotation of the new roll and the other being arranged for manual operation, a severing device for the running web and means whereby upon the actuation of the deflecting device the severing device is set for operation depending upon the rotation of the new roll. In one form, Fig. 1, the construction is the same as that described in Specification 478,578 and comprises a web-deflecting brush 26 carried by an arm 31 mounted on a pivot shaft 28 and a severing knife for the running web mounted between sheath plates 32, 33 carried by arms 37 also mounted on the shaft 28. The arm 31 is moved to cause the brush 26 to press the running web 24 into contact with the new roll 13 by a cable 54 attached to the arm and to an arm 56 actuated by a hand lever 61. A catch prevents movement of the arm 31 until a catch-releasing solenoid 18 is energized by the closure of two switches 17, 19 in series, the switch 19 being actuated by the handle 62 of the hand-lever 61 and the switch 17 being closed by a cam 64 once in each rotation of the roll 13. The severing knife is held inoperative between the sheath plates 32, 33 by a latch connected through linkage to a trip arm 85 on the arm 31. When the arm 31 is moved forward to join the webs together, the arm 85 is moved into the path of a device 92, such as described in Specification 410,785, which rotates with the roll 13 and holds the leading end of the web thereof. The striking of the arm 85 by the device 92 acts through the linkage to withdraw the latch from the knife and allow the latter to be projected by a spring beyond the sheath blades 32, 33 and sever the running web. In a second form the release of the knife is effected by the excitation of the solenoid in the revolution of the new roll following that in which the arm 31 is released. The solenoidoperated catch 47, Fig. 16, which, by engagement with a pin 49 holds the arm 31 against operation by the cable 54, carries a pin 106, and a link 79, operatively connected to the knifeholding latch, is held by a spring 108 in contact with a stop 109 on the arm 31, this stop 109, before the arm 31 is released, being in a position to hold the link 79 clear of the pin 106. The movement of the arm 31 to join the webs together allows the link to engage the pin 106 and upon de-energization of the solenoid, the catch 47 turns in an anticlockwise direction and the pin 106 drops into a recess 107 in the link 79. When, in the next rotation of the roll 13, the solenoid is again energized to turn the catch 47 in a clockwise direction, the link 79 is raised causing release of the knife to permit it to be actuated by its spring. Specifications 453,046, 453,112, 478,632, and 478,633 also are referred to.