Patent GB-191416476-A (GB)
Title: Improvements in Sheet Feeding Machines.
IPC: B65H3/06
Filed: 1913-12-29
Granted: 1914-12-29
Abstract: 16,476. Marks, E. C. R., [Middleditch, L.]. Dec. 29, 1913. Sheet - separators. -- The sheets are separated from a pile on a support 9 by one or more combing-sets adjustably mounted on cross-shafts 20, 26 and adapted to feed the top sheet either directly to the feed-board through a forwarding-device or first in a rearward direction between guides 61 as shown. Each combing-set comprises a roll 12 mounted on an eccentric bush 13 loose on a shaft 14 supported in brackets 17 carried by parallel links 18 balanced by adjustable springs 86, and the roll is normally raised and lowered in the brackets 17 through the oscillation of the eccentric by disconnectible mechanism acting alone or in conjunction with lifting-means tending to raise the roll, such mechanism being arranged to be disconnected by engagement of the sheet with a detector 59, whereupon the lifting- means raise the roll rapidly. The coupling- roll 12 is driven from the shaft 20 by a train of wheels mounted on a link 18 and a spiderwheel 15 with apertures loosely engaging pins 16 on the roll. A spring 22<a> constantly tends to turn the eccentric so as to raise the roll, but the eccentric is normally oscillated positively by a telescopic device comprising a member 43 pivoted to the eccentric and a sleeve member 42 oscillated by a T-lever 29 operated by a link 28 and arm 27 from a shaft 26, which is rocked from a cam 32 through arms and links 33, 35, 36 to raise or lower a bar 37, on which bears a rod 38 carried by an arm on the shaft 20. This arrangement of links and bar 37 permits of longitudinal adjustment, by rack- and-pinion gear, of the end frames carrying the shafts 20, 26, along guide-shafts, through one of which the shaft 20 is driven. The telescopic members are normally connected by hooks 44, 45, and in their upward movement, which lowers the roll on to the pile, a cam 54 on the member 43 acts on a rod 55 connected to a spring-controlled pawl 22 engaging a fixed rack 21 to support the combing roll frame, and disengages the pawl, a spring serving to re-engage the pawl when the roll is lifted. When, however, a sheet strikes a detector 59, adjustable on a rod 63 carrying adjustable stops 64, the rod is moved through its bearing 62 and, through lever 65 and link 68, moves an arm 47 carried by a spring-controlled lever 69, so that the bent-over upper end of the arm is carried into the teeth of a wheel 48 mounted on the hook 45 and driven from the shaft 14. The bent end of the arm 47 is thereby carried against a fixed abutment 46, which reacts to force the hook 45 clear of the hook 44, and the spring 22<a> then immediately acts to lift the roll. In this action, the cam 54 on the descending member 43 passes clear of the arm 55, and the pawl 22 engages the fixed rack 21 to support the combing roll frame. The hooks are reengaged by a spring 58 when the member 42 is lowered. By adjusting the feeler 59 and stop 64 on the rod 63 so that the stop does not contact the bearing 62 immediately the combing-roll is raised, the sheet will move owing to its inertia and register against the feeler when the stop contacts the bearing.