Patent GB-191207841-A (GB)
Title: Improvements in or relating to Automatic Feeding Mechanism for Printing Presses.
Inventor: WALKER ARTHUR HENRY
IPC: B65H3/10
Filed: 1912-04-01
Granted: 1913-03-27
Abstract: 7841. Walker, A. H., [Wood, H. A. W.]. April 1. Feeding sheets; pile tables; sheet-separators. -Relates to feeding- mechanism for printing- presses in. which the bottom sheet of a pile is first seized by one or more rows of suction orifices arranged along a feed-bar and is then moved beneath a sheet separator towards the printing-couple by an angular movement of the feed bar, and consists (1) in the provision of means for angularly adjusting the feed-table relatively to the feed-bar to enable the sheets to be engaged, according to their thickness or weight, by one or more of the rows of suction orifices ; (2) in an improved construction of sheet separators; and (3) in improved means for releasing the sheets from the feed bar. The feed-table 33, Figs. 1 and 6, is mounted upon a pair of rods 34 carried at one end by castings 35 mounted on the feed bar 49 and supported at their other ends by a rod 37 connected to a cross-shaft 36 and to a bracket 38 on the machine frame. The rods 34 are angularly adjustable about the feed-bar 49 by means of adjustable collars 39 on the rod 37 so that the sheets can be engaged by one or both of two rows of suction orifices 50a in the feed-bar. When only one row of orifices is in use, the other row may be closed by passing a paper over it. The feed-table is reciprocated upon the rods 34 by means of a link 32 and a lever 29 mounted upon a rod 24, which is oscillated by means of an arm 23 and a rotating cam 21. To provide for adjustment of the reciprocation of the feed-table according to its angular position. the lever 29 is loosely mounted upon the rod 24 and is provided with a bolt 29<a> passing through a slot in an arm 28 secured to the rod 24. The relative position of the lever 29. and the arm 28 is adjusted by means of a screw 30 carried by the arm 28 and passing through the bolt 29<a>, and the arm and lever are secured in adjusted position by a nut 31 on the bolt 29<a>. The angular movement of the feed-bar 49 is obtained by means of a rack 51 on the feedtable engaging a pinion on the bar. The sheet separator comprises a plate 80, Figs. 2 and 6, having a nose of triangular cross-section and provided with a curved front edge 81, to engage the bottom sheet and separate it from the remainder of the pile. As the pile advances, the lower flat surface of the nose smooths the separated sheet, and the upper surface supports the pile. The plate 80 is mounted upon brackets 71 on an angularly adjustable rod 70, is adjusted longitudinally by means of a screw 82, and is clamped in adjusted position by means of screws 75, which also fix adjustable brackets 74 carrying a plate 76 for limiting the movement of the pile. The plate 76 is provided with slotted arms 77 secured to the brackets 74 by a screw 79 to enable the relative inclination of the plates 76 and 80 to be adjusted. The suction in the feed-bar 49 is obtained by a pump 46, Fig. 1, operated by a lever 42 and cam 40 and connected by a flexible hose 47 with a fixed cap 48, Figs. 4 and 5, in which the end of the bar 49 rotates. A port 56 in the bar is adapted to put the longitudinal passage 50 of the feed-bar alternately in communication with the hose 47 and with the atmosphere through a vent 57 in the cap 48, to seize and release the sheets. The port 56 also puts the hose and vent 57 momentarily in communication during the turning of the feedbar.