Patent GB-136747-A (GB)
Title: Improvements in or relating to Web-renewing Mechanisms for Printing Presses or other Web Machines.
IPC: B65H19/18
Filed: 1919-04-09
Abstract: 136,747. Goss Printing Press Co., (Goss Printing Press Co.). April 9, 1919. Feeding webs.-A web-renewing mechanism for a printing or other machine comprises means for supporting two web rolls for alternative use without shifting either rull, means for rotating a fresh roll in either position at the same surface speed as the web being fed from the other roll, means for stripping the leading end of the fresh web from its roll, and a single guiding-member having guide-faces converging towards a pair of co-acting rollers between which the running web passes, to guide the end of the fresh web into the bite of the rollers to cause the webs to adhere together. As shown, the press is fed alternately from rolls 16, 17 mounted in stationary bearings 20, 21, by a pair of feed-rollers 25, 26 bearing directly on the web. The fresh roll 17 is prepared by lightly securing the end of the web to the body of the roll and applying patches of adhesive to the end of the web, and is adapted to be rotated at the same surface speed as the expiring web by belts 55, the driving-shaft 49 of which is driven from the press by a shaft 43 and gearing 44, 45, 47, 48. The belts pass round pulleys fixed to the shaft 49 and round pulleys 53 carried by arms 51 connected by cross-bars 52 and secured to sleeves loose upon the shaft 49. One of the sleeves is provided with a toothed segment 56 gearing with a segment 57 provided with an operating-lever 58 by which the belts 55 may be swung into or out of contact with the roll 17. Similarly arranged and operated belts 66 are provided in connexion with the upper roll 16, a link 72 connecting the segment 57 with the corresponding segment 71 of the mechanism of the belts 66. The end of the web is stripped from the rotating roll 17 and directed into the bite of the feed-rollers by means of a stripper 32, which is moved into contact with the roll. The stripper 32 is provided with arms 35 loosely engaging the shaft 28 of the feed-roller 26, and is held normally in its inoperative position by a latch 39 on the press frame engaging a notched collar on one of the arms 35. The stripper moves into contact with the roll on releasing the latch by a. pull on a cord 42. A stripper 31 coacts with a fresh roll in the upper position, and is mounted similarly to the stripper 32; but a spring 36 is provided to move the stripper upwardly into engagement with the roll 6. A guide member 33 with converging- guide-faces coacts with the strippers to conduct the web to the rollers 25, 26. In a modification, Fig. 6, a. single set of roll-driving belts 78 is provided and adapted to be swung into contact with a roll in either the upper or lower position. The belt-driving shaft 75 is driven through reversing- gears. The strippers 31<a>, 32<a> are mounted on shafts 79, 80 adjacent to the feed-rollers 25<a>, 26<a>, and the guide-member 33a is mounted about the shaft 75. To prevent the strippers from remaining in contact with the rolls throughout their unwinding, rollers 86, 90 engaging the rollers and connected by linkage to the strippers are provided.