Patent GB-191424233-A (GB)
Title: Improvements in or connected with Sheet Paper Feeding Machines.
Inventor: VICKERY FREDERICK WILLIAM
IPC: B65H9/14
Filed: 1914-12-17
Granted: 1915-11-11
Abstract: 24,233. Vickery, F. W. Dec. 17. Pile supports for sheet feeds; separators; carriers; smoothers.-A feeding-apparatus for fanned-out sheets is provided with (1) a reciprocating member movable towards and away from the leading sheet of the pile and arranged to control the advance thereof, (2) detector mechanism arranged adjacent to the feeding- off rolls for controlling the rise and fall of the combing-rolls, and (3) means for driving the feeding-off rolls so that they are substantially stationary when they take and deliver the sheets. (1) The feathered pile is moved over supports 15, and a detector 2, Fig. 1, pivoted on an arm 3 oscillated from a cam 8, is moved towards and away from the edge of the top sheet. The detector is preferably fork-shaped and, in its inward movement, passes under the top sheet and embraces the second sheet, being supported by an arm 12<a>, which is rocked to allow the detector to ride on the second sheet on its outward movement and, on passing clear of the edge thereof, to fall through slots in the support 15 into engagement with a rack 16. This rack is thus moved an amount depending upon the position of the front edge of the second sheet. and acts through a bell-crank 22 and bar 21 to give a corresponding return movement to a pawl 19, which engages a ratchetwheel 18 on a supporting-drum of the pile conveyer, and is operated to advance the conveyer by a cam 25 engaging a bar 23 pivoted to the bell-crank 22. (2) The top sheet 1, Fig. 1. is moved by combing-rolls 11, Fig. 3, to feeding- off rolls 26, 27 and acts against a detector 28 adjacent thereto to trip the combing-rolls while the sheet is fed off and the pile advanced. The combing-rolls are carried by a rocking- frame 41, 55 mounted on a shaft 40, which also carries spring-controlled rocking-frames 47, 42. Fig. 2, actuated by cams 49, 45 on the shaft 9 carrying the cams 8, 25, Fig. 1. When a sheet comes against the detector 28, it raises it so as to lower a rod 30, Fig. 2, to lock a rack 32 gearing through a wheel 35 on a pivoted arm 36 with a quadrant 43 on the rock-frame 42, the movement of which then rocks the arm 36 against its spring 38 and brings a projection 39 thereon against the circular end 59 of a. trip lever 50, Fig. 3, to disengage it from the arm 55 of the combing-roll frame. A spring 56, connected by a chain 54 passing round pulleys 52, 53 on the rock-frame 47 to the arm 55 and acting to press the combing-rolls on the pile, can then raise the combing-rolls 11, this rock-frame being held by a second trip lever 51 controlled by a stop 61 on the trip lever 50 falling into engagement with a fixed rack 60. The parts are reset by the cam 45 rocking the frame 42 to carry the arm 36 clear of the trip lever 50, which, after an adjustable screw 41<a> on the combing- roll frame has come against a stop 41<b>, is reengaged with the frame 55 by a spring 47<a>, the lever 51 being simultaneously raised from the rack 60. The rock-frame 47. when moved by the cam 49, engages by an adjustable screw 66 with the detector to hold it clear of the sheet during feeding-off. A clamp 62, Fig. 3, is provided to prevent movement of a sheet after being fed to the detectors, snch clamp comprising an arm frictionally engaging the shaft 40 and carrying a swivelling part bearing on the sheet. (3) To secure accurate delivery, the feeding-off roll 27 is driven so as to be substantially at rest when taking and giving up the sheet, and for this purpose, a wheel on the cam shaft 9 is geared with a wheel on the roll shaft through a train of wheels mounted on bars extending between rock-arms on the cam and roll shafts, the arm on the roll shaft being extended to provide an adjustable connexion for a rod passing to an operating-cam, which acts to rock the arms and carry the wheels round the shaft so as to counteract the motion transmitted at the times a sheet is taken and delivered.