GB156720A - Pneumatic paper feeding apparatus in high speed presses, folding apparatus and the like - Google Patents

Abstract

156,720. Heenss, H. May 23, 1916, [Convention date]. Dropping-roller and like sheet feeds; sheet separators and carriers; pile supports.-Sheets are fed to printing, folding, and like machines at a high speed by means of suction nozzles which are moved into contact with the rear edge of the top sheet, of a pile, and then are tilted and moved towards a sheet-forwarding device on to which the separated sheet is deposited, the feeding of more than one sheet at a time being prevented by means of blasts of air delivered by nozzles arranged adjacent to the suction nozzles and tilted about the same axis as the nozzles. As shown, a pile table 6 is mounted above a feed-table 2 attached to supporting rails 3 from which depend guide tubes 4 for racks 5 which keep the table 6 at a constant level by means of mechanism involving a finger 47 which acts on the pile and worm gearing 9, 10, and pinions 7 on shafts 8 which engage the racks 5. The rear sheet of the pile is separated by means of a series of nozzles 27, Figs. 1, 3 and 6, depending from a tube 26 which is connected to a suction pump and is carried by levers 15 pivoted to a slide 14 which is moved along pivoted guides 13 by crank and link mechanism comprising links 17, 19, a triangular lever 18, and a lever arm 20 on a shaft 21 which is oscillated to an adjustable extent by a connecting-rod 23 adjustably connected to a reversing link 24 operated by a crank pin on a disc 25. In addition to its longitudinal movement along the guides 13, the slide is adapted to be raised and lowered by means also controlled from the crank-disc 25. The disc 25 oscillates levers 32 with pins 31 which support the guides 13, the front ends of the levers 32 being con. nected by a rod 47 which limits the motion of the levers 32 towards the pile, the rod 47 also acting in conjunction with known means for controlling the feeds of the pile table. A projection on the slide 14 limits its motion to the left, and then the continued movement of link 19, and lever 18, causes the suction nozzle 27 to tilt about the tube 26 to the position shown in Fig. 6. The air tube 28, air-blast nozzle 29, and deflector 30 move with the suction nozzle, and this effectively blows off any sheets adhering to the one raised by the nozzle 27. A pin 36 on link 19, in conjunction with a fixed cam surface, assists in raising the lever 18 to a vertical position to cause the tilting action described. The separator 27 carries the sheet in a rearward direction and when the suction is cut off, a dropping roller 42 feeds it into the bite of belts 38, 46, which carry it downwards, then under the pile table, and forwards to the feed-table 2. For dealing with sheets of varying widths the suction nozzles may be attached to tubes 48 which are adjustable laterally on an inner tube fitted with suction ports 49.