GB473397A

GB473397A - Improvements in printing presses

Info

Publication number: GB473397A
Application number: GB2941/37A
Authority: GB
Original assignee: American Type Founders Co Inc
Current assignee: American Type Founders Co Inc
Priority date: 1936-04-03
Filing date: 1937-02-01
Publication date: 1937-10-12

Abstract

473,397. Feeding sheets. AMERICAN TYPE FOUNDERS, Inc. Feb. 1, 1937, No. 2941. Convention date, April 3, 1936. [Class 100 (i)] Sheets are fed to the grippers 16 of the impression cylinder 10 of a rotary or continuous revolution cylinder printing-machine from a feed board 20 by means of grippers 25 on a carrier which is moved at a variable velocity in a circular path 27 which is eccentric to the cylinder 10 and is tangential thereto at the position 15. The grippers 15 are brought substantially to rest when taking the sheet from the board 20, and are then accelerated to a speed greater than the cylinder 10 and are made to travel at the same speed as the grippers 16 at the time of transfer of the sheets to the grippers 16. After this the grippers 15 are accelerated and finally slowed down to receive the next sheet. The sheets are controlled by inner guides 28 and outer guides 29 during feeding, and the inner guides are formed with gaps 32 to permit of delivery of the printed sheet along a path which intersects the path of feed. The sheets are delivered printed-side-up by strippers 35, rollers 36, and a conveyer 34, as shown diagrammatically in Fig. 1. In practice the grippers 25 are carried by arms 23 secured to annular gears 54, 55, Fig. 5, mounted to rotate on fixed hubs 56 arranged eccentrically to the shaft 48 of the impression cylinder 10, which is geared to the printing- cylinder 12 by means of gears 46, 47, the gear 46 being driven by any driving-mechanism. The gears 54, 55 are driven from the shaft 45 by means of planetary gearing comprising gears on a shaft 78 which is geared to the outer teeth 67, Figs. 5 and 8, of a freely mounted annular gear 65, the inner teeth 66 of which are engaged by a pair of planet gears 74 arranged around a sun gear 70 secured to the shaft 45 of the printing-cylinder. The gears 74 are mounted in a yoke 71 which is oscillated by a cam 88 on the shaft of the impression cylinder engaging a roller 86 on an extension of the yoke 71.