Patent GB-870337-A (GB)
Title: Improvements in or relating to web supply apparatus
IPC: B65H19/18
Filed: 1958-01-16
Abstract: 870,337. Feeding webs. ST. REGIS PAPER CO. Jan. 16, 1958 [Feb. 18, 1957], No. 1587/58. Class 100(1 ) A web roll stand 20, Fig. 5, has pedestals 21, 22 carrying cradles 23, 24 respectively. for supporting a core 25 of a web roll 26. The pedestals are laterally adjustable along bars 65, 65 by means of a threaded shaft 75 engaging a threaded bore in a lug 76 attached to the pedestal 21. The pedestal 22 is secured by a cross-shaft 77 to the pedestal 21. The shaft 75 is rotatable by a handwheel 75a which drives the shaft through a belt or chain, not shown. Natural deviations of the running web may be corrected automatically by a photo-electric detector, not shown, adjacent an edge of the web, the detector controlling an electric motor, not shown, driving the shaft 75. The roll 26 is engaged by a pair of rollers 28 on a shaft 30 mounted in pivoted arms 40 actuated towards and away from the roll 26 by pneumatic cylinders 46. The shaft 30 is driven by a motor, not shown, which also drives the main feed rollers (not shown) of the machine supplied with web, a variable speed device 35 (Fig. 1, not shown) being included in the drive to permit variations in speed of the supply roll 26, thereby varying web tension. Transfer arms 78, 79 support an expiring web roll during' a splicing operation for attaching to the expiring web the leading end of a new roll loaded on to the pedestals 21, 22. The core shaft 25 is supported in the cradles 23, 24 by self-aligning bearings 83, 84. The core shaft 25 of an expiring web roll is removed from the cradles 23, 24 by raising posts carrying the cradles and vertically slidable in the pedestals by means of pneumatic cylinders, such as 88, positioning cradles 85, 86 carried by the arms 78, 79 beneath the core 25 and then lowering the posts. A brake 94, Fig. 3, has parts 96, 96a hinged on a pin 95 carried by the arm 78. The parts 96, 96a engage the core shaft 25, to exert a braking action on the roll 26, the braking action being controlled by a handwheel 97 threaded on a shaft 98. A splicing roller 101, Figs. 5 and 8, is provided for urging the web 26a into contact with the periphery 120a of a replacement roll 120 supported by the pedestals 21, 22. The roller 101 is mounted between arms 111, 112 mounted for angular movement about a shaft 103 carried by arms 104, 105. The arms 104, 105 are secured to a pivot shaft 106 having counterweights such as 107. A knife 102 is secured to the shaft 103. In operation, a splice is made by first accelerating a new roll 120 to the linear speed of the web 26a by engagement with the rollers 28. The splicing roller 101 is brought into light contact with the roll 120 by depression of an arm 109 carrying the counterweight 107. The arm 109 is then depressed further to cause the knife 102 to sever the web 26a. In a modification (Fig. 16, not shown) the rollers may be replaced by an endless belt 122. In a further modification (Fig. 17, not shown) a roller 28a, for rotating a loosely wound roll 130, has a rod 131 inserted under the resilient roller covering, thus causing a bumping action against the roll 130, thereby eliminating wrinkles and creases. Specification 845,423 is referred to.