Patent GB-359563-A (GB)
Title: Improvements in or relating to mechanism for feeding paper or like webs
IPC: B65H23/188
Filed: 1930-07-26
Abstract: 359,563. Feeding webs. BLACK, H. D., The Island, Uxbridge, Middlesex. July 26, 1930, No. 22580. [Class 100 (i).] Mechanism for feeding a previously printed inset web in register with other products, such as webs printed by a high-speed rotary press, and of the type including a conveyer engaging and travelling with the inset web for a predetermined period and associated with means for detecting variations of register and causing the operation electrically or pneumatically of mechanism for correcting the variation as described in Specification 316,956, [Class 100 (i), Feeding and delivering webs &c.], is arranged so that once the correcting-mechanism is set in operation by means operable by the detecting-device it continues to operate until any error in registration is eliminated, when the correcting-mechanism automatically ceases to function. In the electrical device described, the inset web 2, Fig. 2, provided with a series of regularly spaced apertures 3, passes over a conveyer 1, which is formed with at least three circumferential contacts 4, 5, 6, co-operating with an arcuate brush 13 and connected by corresponding rings 7, 8, 9 and brushes to leads 10, 11, 12, which connect, as shown in Fig. 1, through relays 25, 17, 18 to the negative pole of a source of electrical energy, the brush 13 being joined to the positive pole. In parallel with the brush 13 and the contact 5, and the brush 13 and contact 6 are two armatures 15, 16 operated by the relays 17, 18, normally spring- held out of contact with their associated contacts 19, 20 while further armatures 21, 22, also spring-held out of contact with their contacts 23, 24, serve when attracted by the relays 17, 18 respectively to close circuits containing correcting- mechanism A, B, one of which serves to correct errors in registration in one direction while the other corrects errors in the opposite direction. The relay 25 is furnished with armatures 26, 27 normally held closed by spring action but, when the webs are in register and connection accordingly established between the brush 13 and contact 4, through the aperture 3 in the web, the relay 25 attracts the armatures 26, 27 and breaks the circuits containing the relays 17, 18, so that the correcting-mechanism is not actuated. When the web 2 creeps out of register, the apertures 3 are displaced in one direction or the other with respect to the contact 4 and connection is established between the brush 13 and one of the contacts 5 or 6, while the armatures 26, 27 are no longer held by the solenoid 25. If the contact 5 and brush 13 are in contact, the solenoid 17 is energized, and attracts the armatures 15, 21 : the latter serves to actuate the correcting- mechanism A, while the former short-circuits the contact 5 and brush 13, so that the mechanism A continues to function until the webs are again in register, when the brush 13 and contact 4 again complete the circuit of the solenoid 25, which accordingly attracts the armature 26, breaks this circuit, and de-energizes the relay 17 to release the armatures 15, 21 and stop the correcting-mechanism A. Similarly, if the contact 6 and brush 13 are in contact, the relay 18 is actuated and the mechanism B corrects the register. In a modification, the armature 16 of the solenoid 18 is arranged as shown in dotted lines to control the circuit of the relay 17, so that when the relay 18 is energized, movement of the armature 16 automatically breaks the circuit of the relay 17 : a similar control may be applied to the relay 18. Other types of contacts may be employed: the brush 13 may be replaced by an arcuate band or plate and the contacts 4, 5, 6 may each be replaced by a series of contacts, pins, or springs as described in Specification 358,613. In lieu of the contacts 4, 5, 6, corresponding apertures may be provided in the conveyer connected by ducts to pneumatic pistons, which control the switches of corresponding circuits.