Patent GB-190216313-A (GB)
Title: Improvements in Printing Machines.
Inventor: NEWTON HENRY EDWARD
Filed: 1902-07-22
Granted: 1902-08-28
Abstract: 16,313. Newton, H. E., [Hoe, R.]. July 22. Rotary machines ;feeding sheets; delivery apparatus; lithographic and like printing. -Relates more particularly to machines for printing with a yielding transfer surface upon metal sheets. Fig. 1 shows a machine having a cylinder 5 provided with a rubber or like transfer printing- surface 7. The printing-surface may be of other kind. The surface 7 is inked or coloured, preferably in a design, by an aluminium or other plate or surface 11 on a cylinder 10. This surface is inked by the mechanism shown, and, when necessary, damped by the apparatus 14. The cylinder 10 has an ink-table which co-operates with the inkinp-mechanism in distributing the ink. The cylinder 10 has also an impression surface 15, which may be of aluminium or like photographic material, and may be damped by the apparatus 14 to cause it to repel ink. The cylinder 5 receives the ink during one revolution, and prints the plate or sheet against the surface 15 during the succeeding revolution. The cylinder 5 is in movable journal boxes 3, and is pressed a little away from the cylinder 10, when printing the sheets, by springs 18 on rods 17, and is drawn down into contact with the surface 11, by means of toggles 20, 21 operated by rods 25 having bowls 26 engaged by slotted arms 27 on a shaft 28 rocked by an arm 29 and cam 30 on the shaft 9 of the cylinder 10. The shaft 28 has arms 31 supporting a roller 16 for wiping or removing surplus moisture from the impression surface 15 ; or the wiping-roller may be otherwise arranged and operated. The cylinder may be tripped by means of a hand lever 32 on a shaft 34<1> having arms connected by rods 33 to the rods 25. When the lever 32 is forced down, the rollers 26 are disengaged from the slotted arms 27, and the cylinder 5 is not drawn down. In a modified form of machine, the cylinder 10 has an impression surface only, and the surface 7 receives ink from another cylinder above it. The plates or sheets are fed by means of a reciprocating gripper carriage 45, having rollers 47 running in inclined guideways 48 on the framing. The grippers consist of a transverse bar 49 fixed in the carriage 45, and a gripping-bar 50 movable on posts 53 fixed on the bar 49. The gripping- bar has an adjustable gripping-plate 51 on one side. The carriage 45 is provided with front stops for the plates or sheets, and these may consist of angle-pieces 56 secured adjustably to the bar 50 by thumb-screws. The carriage 45 is reciprocated by means of racks 58 thereon and gear-wheels 41 on a shaft 59 having a pinion 60 gearing with a segment 42 having an arm operated by a cam 43 on the shaft 9. The cam 43 is formed, to give a dwell to the carriage during the feeding of the sheets to the grippers. Parts of the cylinders 5 and 10 are cut away to permit of the movement of the gripper-bars. At the upper end of the movement of the carriage the grippers are opened and closed by cam arms 36 on a shaft 66 rocked by an arm 37, rod 39, lever 38, and cam 40. The grippers are held closed by springs held on the posts 53 by nuts 54. When the grippers have carried the front end of the sheet through the cylinders, they are opened by fixed cam arms 35, the sheet being then carried on through the grippers by the movement of the cylinders and passing down over the rollers 77. The carriage 45 is registered with the cylinders at the time of feeding the sheet by means of a short rack on the carriage gearing with a segment secured to the cylinder 5 or its shaft. The short rack is adjustable to suit the position of the cylinder 5 by an adjusting-wedge and set-screws &c. The cylinder 5 is adjusted in position for the thickness of the plates &c. being printed, by stop screws 22 which limit the amount of separation of the cylinders 5 and 10.