Patent GB-1114733-A (GB)
Title: Web rewind machine
IPC: B65H19/22
Filed: 1965-10-01
Abstract: 1,114,733. Winding webs. CAMERON MACHINE S.A. 1 Oct., 1965 [2 Oct., 1964], No. 41845/65. Heading B6B. A web-winding machine for winding a plurality of webs longitudinally slit from a single web comprises a plurality of pairs of web-roll support arms and a pivotally mounted tracking or back-up roller for each web roll. Individual control means is provided for controlling the nip pressure between each of the tracking rollers and their respective web-rolls and control means is provided to pivot the web-roll support arms in response to a predetermined amount of pivotal movement of any one of the tracking rollers so as to take into account the increase in diameter of the web-rolls. A web 14 passes over guide rollers 16 and 17, a pneumatic cylinder loaded tensioning roller 18, a feed roller 26, a spreader roller 28, and feed rollers 30 and 32 and through longitudinal slitters 38. The plurality of webs so formed, are alternately fed by the roller 44 to tracking rollers 46 and 48, whereupon they are individually wound into a plurality of web-rolls 50 and 52 at the front and rear sides of the machine. Web-roll supports.-Each web-roll is supported by a pair of arms, such as (62) and 64 (Figs. 2 to 4). The inner ends of the arms are supported on a shaft 74, Fig. 1, having a slideway 76 which mates with corresponding recesses in the arms, so that the arms may be longitudinally positioned to accommodate rolls of various widths. Clamping screws 78 retain the arms in their preselected positions. A fluid cylinder (216, Figs. 2 and 5), acts on a bracket (222) clamped to the shaft 74 to pivot the arms about the axis of the shaft 74. Chucks (171 and 172, Figs. 3 and 4) clamp a web-roll core (54) at the outer end of the arms, the chuck (172) being moved longitudinally to clamp the core by means of a crank-arm (180) and fluid pressure cylinder (192). The chuck (171) is driven by a fluid controlled friction clutch (111) via a bell-and-pulley system (162, 164). Each clutch (111) has a driving gear 112, and each gear 112 meshes with a common drive shaft 86, Fig. 1, which shaft is driven by an electric motor 108 via a pulley and gear train 102, 106, 100, 92, 91, 90, Figs. 1 and (2). Tracking or lock-up rollers.-Each web-roll tracking roller 48 is rotatably mounted in a tracking arm 196, Figs. 1 and (12), pivotally mounted on a frame 198 adjustably mounted on a slideway 202 which extends the entire width of the machine. The end of the arm 196 is pinned to connecting links 204, Figs. 1 and (11), which links are interconnected by a shaft 208. A universal joint (210) connects shaft 208 to a fluid pressure cylinder 214, which cylinder provides the nip pressure between the tracking roller and the web-roll. Control.-With the web-roll support arms angularly fixed, as the diameter of each webroll increases, each tracking roller 48 will move against the load exerted by the fluid pressure cylinder 214. After a predetermined amount of movement, a surface (224) on the universal joint (210) of one of the tracking roller mechanisms (i.e. that associated with the web-roll whose diameter has increased the greatest), will contact one finger (226) of a plurality of fingers depending from a tray (228, Fig. 9). This tray (228) is mounted on a shaft (230, Fig. 10). A hub (236) with a projecting member (238) is mounted on shaft (230). If over travel of the shaft (230) occurs, the projecting member (238) operates a switch (239) to stop the entire winding machine. Interconnecting linkage (244) between the hub (236) and a rotary valve (240) enables the valve (240) to control the pressure applied to fluid cylinder (216, Fig. 5), thereby repositioning all the webroll support arms in unison on one side of the machine due to the increase in diameter of the largest web-roll. The arcuate movement of the shaft 74 is transmitted as arcuate movement of a plate (254, Fig. 5) by a connecting rod (252). The plate (254) carries an adjustable cam (264, Figs. 5 and 7). A valve (268) with a cam follower (274) is controlled by cam (264), i.e. controlled by the arcuate movement of the web-roll support arms. The valve (268) controls the fluid pressure applied to individual clutches via ratio control station (282, Fig. 8), thereby controlling the torque transmitted by the clutches. The arcuate movement of a gearwheel (256) attached to the plate (254) (dependent on the arcuate movement of the webroll support arms) rotates a potentiometer (300) via shaft (290) and gear (294). The potentiometer (300) controls the speed of the motor 108 throughout the winding cycle of the machine, thereby reducing the degree of slip in the clutches (111). A bracket (286, Fig. 5), carrying a contact (287) is attached to the connecting rod (252). If over-travel of the connecting rod (252) occurs, the contact (287) will actuate a switch (288) to stop the entire winding machine.