Patent GB-190313363-A (GB)
Title: Improvements in Apparatus for Automatically Controlling the Unwinding of Rolls of Paper, for Use in connection with Printing and Folding Machines.
Inventor: LOCK WILLIAM HENRY
Filed: 1903-06-15
Granted: 1904-06-09
Abstract: 13,363. Lock, W. H., and North, T. M. June 15. Feeding apparatus for webs; associating and delivery apparatus. - Relates to apparatus for feeding or unwinding a web from a roll at variable speed for associating it in register with another web being printed, for folding together or, other purpose. Fig. 1 shows an apparatus in which the previously - printed web 1 is unwound from a roll 7 and associated on the roller 100 in correct register with a web 6 issuing from the printing- press. From the roller 100, the webs pass together to any suitable cutting and folding or other apparatus. The web 1, while it is being printed, has two holes 2, 3, Fig. 13, punched in the margin of each sheet to be cut from it, the holes in every part of the web being in exactly the same relative position with the printed matter 5 on the sheet. The roll 7 rests on two rollers 15, geared together so as to rotate in the same direction and unwind the web at the required speed. On the shaft 10 of one of the rollers 15 is a conical pulley 22 adjacent to a reversed conical pulley 23 driven by suitable means. Gripped between the conical pulleys 22, 23 is an endless friction band 25, and the speed at which the pulley 22 is driven by the pulley 23 is varied by moving this band in a direction parallel to the shafts 10, 24. The belt 25 is moved automatically by a lever 27 pivoted at 28 and connected at its upper end with a registering-mechanism operated frum the drum 34, round which the web 1 is guided by rollers 98, 99. The registering-drum 34 is geared, by a shaft 31 and bevel-gearing, to the shaft 24. The drum 34 is in two parts and, in the central space between them, is a stationary cam 44, Fig. 5. On the end of one of the parts 34 are two radially-sliding pins 49, in diametrically opposite positions, one of which is adapted to co-operate with the perforations 2 and the other with the perforations 3 in the web. The pins 49 are pressed outwards by springs 53, and are each engaged by an arm 54 of a three-armed lever 54, 55, 56. The arm 55 is operated by the cam 44 to withdraw the pin 49 during part of each revolution and permit it to be projected beyond the cylinder if one of the holes 2, 3 is in register with it. If the web is in correct register, both of the holes 2, 3 are out of register with the pins, as shown in Fig. 13, and both pins are prevented from being projected by their springs. When a pin is projected, it engages and moves one of the star-wheels 79 or 80 on shafts 75, 76 in a cage 39 geared by the wheel 36 to rotate in the same direction as the drum 34. The star-wheels 79, 80 are each geared, through a ratchet arrangement, with a nut on a shaft or rod 41, which is prevented from rotating, and the gearing is such that they rotate the nut in opposite directions and move the rod 41 longitudinally in corresponding directions. The rod 41 is connected to the upper end of the lever 27, so that the band 25 is moved to increase or decrease the speed of the web 1 according to which of the pins 49 is projected. A means is provided for preventing a second projection of a pin 49 for a certain time. This consists of a lever 74 caused to bear on the arm 56, and thereby hold the pin withdrawn, by a cam 64 mounted to rotate on a stud on the end of the drum 34. Rotating with the cam 64 is a disc formed with notches 66, 67, 68 and a cut-away part 69. When a pin 49 is projected, a pawl 59 on the arm 56 engages a pin on the disc and rotates it into position for one of its notches to engage a stud 72 on the stationary cam 44. The notches 66, 67, 68 are successively engaged by the stud 72 until the disc is rotated back to the normal position shown, in which the cam 64 permits the lever 74 to be moved by its spring away from the arm 56.