Patent GB-1011246-A (GB)
Title: Improvements relating to apparatus for splicing printed paper webs in correct register
IPC: B65H21/02
Filed: 1962-08-13
Abstract: 1,011,246. Feeding webs. HUCK-ENTWICKLUNG G.m.b.H. Aug. 13, 1962 [Aug. 11, 1961 (2)], No. 30894/62. Heading B6B. An apparatus for splicing with correct register a pre-printed running-off paper web 8 to a pre-printed paper web roll 11 in which the speed of the roll is synchronized with the web, includes a strip 20 adapted to be wound on the roll 11 and bearing successive marks 19, the strip serving to control a replacement roll drive. A driving shaft 1 is connected to the drive of a printing machine (not shown), and drives via a variable speed belt gear 2 controlled by a roller 15 actuated by a tensionsensing roller 14 a shaft 3 carrying a disc 4 driving belts 5 engaging running-off roll 7. A belt 17 driven by the shaft 3 through a belt drive 16 is pivotally mounted about a spindle 18. The spaces between the marks 19 on the strip 20 increase from right to left and coincides with the registration length of the running-off web 8 at the end wound on the replacement roll. The strip is wound on a disc 22 secured to a shaft 23 driven by a belt 25 on a shaft 24 driven by an hydraulic motor 26. The motor 26 is supplied with oil under pressure by a pump 28 driven by the shaft 1, the quantity of oil delivered by the pump is adjustable by a control slide 36 pivotally connected to a lever 37 actuated at one end by a push-rod 38 carrying a follower 39 engaging a cam 40 driven through a reduction gear 42 by the motor 26. The cam 40 makes approximately one revolution during the winding of the strip 20, thereby gradually increasing the quantity of oil delivered by the pump 28. The speed of the motor 26 is thus increased such that the peripheral speed of the roll 11 equals the linear speed of the web 8. Photo-electric scanners 44 and 45 co-operating with the running-off web 8 and strip 20 respectively are both connected to a register control 48. The control 48 establishes the time differential of the passage of register points on the web 8 and marks on the strip 20 and produces a signal fed to a register motor 50 which drives a screw 53. A nut 54 on a lever 55 engages the screw 53 and thus actuates the lever 55 connected to lever 37 by a link 57, such that the slide 36 is additionally displaced or displaced less according to the direction of rotation of the motor 50. The lever 55 also adjusts a pistonrod 60 in a cylinder 59, such that additional oil flows to the motor through conduit 58 when the lever 55 moves down. In operation, the running- off roll 7 is in position 7<SP>1</SP>, a diameter-sensing control 63 comprising a light source and photo-electric cell causes arm 9 to be rotated into the position 7 shown when the roll is sufficiently diminished. A second diameter control 64 is operated when the roll 7 has almost expired. The motor 26 is then started to wind up the strip which consequently accelerates the roll 11. The belt 17 is moved towards the the roll 11 when the roll 11 has accelerated to the speed of the web 8. The web 8 is then spliced to the roll 11 by brushes, not shown, and subsequently cut by a knife, not shown. The roll 11 is then swung into engagement with the belts 5 and thus separated from the belt 17. In another embodiment, a strip 138, Fig. 2 (not shown), carrying markings is wound up on a roll 142 driven by a motor 144 through an induction coupling 143 both connected to a control device 121. Register scanners 147 and 149 are arranged adjacent the running-off web 105 and strip 138. The replacement roll is accelerated by belts 124 driven through an induction coupling 116 and a differential gear 126 by a main drive shaft 101 so that the belts 124 are driven at a gradually increasing speed. The outer rim of the gear 126 is connected by a belt 129 to gearing 130 driven by a register motor 131 connected to device 121.