Patent GB-190611992-A (GB)
Title: An Improved Sheet-adjusting and Feed-apparatus for Printing Machines.
Inventor: FISCHER GUSTAV
Filed: 1906-05-22
Granted: 1906-10-11
Abstract: 11,992. Fischer, G. May 22. Feeding sheets.- The apparatus comprises feed-arms for adjusting the sheets in stepped fashion on a rough surface, a presser device reciprocating with the feedarms, means for automatically raising the pile table, and side-registering devices on the feedtable. The feedarms k, Figs. 1, 2, and 4, are mounted on a shaft f and stopped by abutments l on the shaft. Rollers r on the arms k engage with the sheets on the pile table 15, stepping the upper sheets over slide-ways t separated by slots u. In the arrangement shown, the central slide-way t is rough and the central roller r is smooth and free to rotate, whereas the two outer ways t are smooth and the corresponding rollers r are rough and do not rotate, and their arms k are provided with distance-pieces s entering, the slots u, so that the rough rollers engage. the uppermost sheet at a predetermined distance from the front edge. The smooth roller r may be dispensed with, or a single rough roller may be used. The arms k may be weighted to regulate the pressure of the rollers r on the sheets. The shaft f is reciprocated in guides g by means of forked levers d on a shaft e and cams c on the driving-shaft b ; springs i return the levers d. The arms k are raised on the return movement by means of arms on the shaft f moving in guides m raised by engagement of cams p on the cams c with rollers q on the guides m. The pressure device comprises a roller 3 mounted on a rod 2 sliding through a support z adjusted on a rod v connected with the shaft f. The rod v is raised and lowered during its reciprocating movement by means of a cam-surface w and roller x. The rod 2 is supported by means of a friction roller 9 and an incline 4 on the support z, and is released in the forward movement of the rod v by riding of the roller 9 up an incline 10 adjustable on an arm 6. The pile table 15, Figs. 1 and 14, is pivoted at its rear end and connected at its front end by cords 14 to pulleys 13 on a shaft 11, which is actuated by means of a ratchet-wheel 12 and a pawl 16 on a three-armed lever 17. Pawls 22 prevent rotation of the ratchet-wheel 12 by the weight of the table 15. The lever 17 is provided at its lower end with a roller 18 adapted to engage with the top sheet, and is also provided with a roller 19 for co-operation with a cam 20 on the shaft b. The cam 20 is provided with a recess 19<a> in which the roller 19 engages on decrease of the pile. The separated sheet is fed to the table 25 by rollers 45<c>, Fig. 4, the upper of which is moved up and down by a lever 45<a> and cam 45<b>. The side-registering devices comprise angular plates 31 adjustable on rods 45, guide-plates 32 on the plates 31, and grippers 36. The rods 45 are connected by a lever 47 and one rod is actuated from a cam 23 on the shaft b, so that, after complete withdrawal of the sheet into register position, the slides 31 are stopped until the printing-cylinder grippers have seized the sheet. The gripper 36, Fig. 18, is depressed by means of a spring 37 when the end of a spring 40 on the gripper passes beyond an angle-piece 42 on the table 25, and is raised by means of an incline on the gripper and a pin 38 on the part 42, the spring 40 being displaced laterally for return over the part 42.