Patent GB-190919447-A (GB)
Title: Improvements in Sheet Delivery Apparatus for Printing Machines.
Inventor: LAKE HAROLD WILLIAMSON
IPC: B65H29/68
Filed: 1909-08-24
Granted: 1910-06-23
Abstract: 19,447. Lake, H. W., [Cottrell & Sons Co., C. B.]. Aug. 24. Delivery apparatus.-Travelling gripper-chains 65, for depositing sheets on a receiving-table 10, are mounted on a vertically-adjustable frame 38, so that the sheets are fed to the grippers 88, 89, either while they are in their lower or upper position, for plain or reversing delivery respectively. Sheet forwarding and guiding devices, and means for raising and lowering the receiving-table are also described. The sheets pass from the impression cylinder 2, past guides 147, 145, 148, intermittently-driven tapes 140, and forwarding-rollers 152, 159, to the dropping-roller 175, and roller 171, which run at the same speed as the chains 65, and slower than the impression cylinder 2. The sheet is delivered by these to the grippers 88, 89. If the sheets are to be delivered printed side up, without reversing, the chains 65 are in the elevated position, as shown in Fig. 3, and the sheets are dropped on the table 10, the guards 108 preventing them from passing above the stops 106. The cam-operated knocking- up devices 100, 101 ensure the proper placing of the sheet on the table 10. The spring-closed grippers 88 are opened by a fixed cam 96 to grip the sheets, and by a cam 97 to release them. For delivery with reversing, printed side down, the frame 38 is lowered by band by means of a worm and wormwheel operating the racks 47, 49, until the chains are in the position shown in Fig. 5. The grippers 88, 89 are also reversed so as to receive the sheets as they are delivered above the chains, by removing the supporting-bars 86, 87, bolted to two of the chain links. The chains are driven by one of two bevel-wheels on a vertical shaft 73, so that in the upper position of the chains 65, their lower portions move outwardly ; in the lower position, the upper portions move outwardly. The grippers 88, 89, opened in this position of the chains 65 by the fixed cam 98, take the sheet and draw it across the guides 115, removably supported by bars 117, and over a cylinder 72*. As the grippers approach the end of their return motion, they are opened by a cam 99, and drop the sheets on the table 10, guards 111 guiding them against the sheet stops 114. Retarding-brushes 118 bear against the sheets as they are being reversed over the cylinder 72*, and are lifted to clear the front edges by cams 127 fixed to links on the chain 65. If it is desired to remove a sheet before delivery by the grippers, a pivoted cam 129 is brought into position by a handle 132 to open the grippers at the end of their outward movement; and also, the lever 132, through a slotted link 138, lifts the brushes 118 clear of the sheet, which is then easily removed from guides 115 by hand. The table 10 is gradually lowered by screws 11, the nuts of which are turned by the gearing shown, from a shaft 15. This shaft is arranged to be driven by a worm and worm-wheel operated from the shaft 7, but, if desired, the worm may be disengaged from the worm-wheel, to allow the shaft 15 to be rotated rapidly by gearing from a small auxiliary motor.