Patent GB-753800-A (GB)
Title: Inking mechanism for high-speed cylinder printing presses
Inventor: KAUFMANN CURT
IPC: B41F31/30
Filed: 1954-08-04
Abstract: 753,800. Printing-machines. HINNIGER, E., HINNIGER, E., and HINNIGER, G., [trading as AUTOMATIC DRUCKMASCHINENFABRIK DR. W. HINNIGER UND SOHNE]. Aug. 4, 1954, No. 22653/54. Classes 100 (1) and 100 (2). Inking-apparatus ; sheet delivery apparatus.- Inking mechanism, e.g. for the reciprocating forme of a high-speed stop-cylinder press, has two groups of rolls each including a forme-inking roll, one group being driven by a drive working independently of the forme carriage at a sub. stantially uniform speed higher than the average speed of the carriage but modified to carriage speed during the inking period, and the other being rotated forwardly and backwardly by the carriage; as the forme roll of the second group contacts the forme in both directions of drive, a three-stage inking is obtained, enabling a relatively thin ink-film to be applied at each stage. The press shown in Fig. 1 has (a) a non-uniform speed drive to the sheet-delivery mechanism 7; a gear 10 mounted on the main crankshaft 9 (from which the forme carriage 2 is reciprocated by a connecting rod 4 and pinion 3) drives a gear 11 carrying a roller pin 12 engaging a slot 13 in a gear 14 the axis of which is offset from that of the gear 11 ; the gear 14 drives the shaft 16 of the delivery mechanism 7 via an idler 15; the amount of the offset of the gears 11, 14 and the profile of the slot 13 are so chosen that the gripper bars 8 move at the correct speed during removal of a sheet from the impression cylinder 6, but move at a different speed at other times. (b) A drive to the fountain and messenger rolls 27, 26 from the main shaft 9 via a crank pin 36, connecting rod 37, bell crank lever 38 and link 39 pivoted at its upper end to a segmental member 41 (Fig. 2) on the swinging shaft 40 of the roll 26, the drive to the fountain roll 27 being taken from the shaft 40 in the usual way. (c) A drive to the second group of inking rolls 51, 55 ... 58 mentioned above, from a rack 45 (on the carriage 2) permanently connected by a 4-gear train (not shown) to a gear on the shaft of the steel roll 51; the first gear of the train is mounted on a fixed sleeve surrounding the shaft of the forme roll 28 with sufficient play to permit adjustment and tripping of the latter. The drive (a) is used to drive the first group of inking rolls 23 ... 25, 28 mentioned above, the shaft of the roll 23 being connected to the shaft 16 by a chain drive 19. The forme roll 28 thus rotates continuously anti-clockwise, and the drive (b) is used to trip it during the return movement of the carriage 2; a cam 42 (Fig. 2) on the member 41 engages a follower roller 43 on an arm 44 extending from a rectangular-section pivoted member 35 engaged by one of two radial arms on a member 34 freely mounted on the shaft of the roll 23; oscillation of the member 35 by the drive (b) causes slight oscillation of the member 34, which is transmitted via an adjusting screw 33 to an arm 32 provided on the frame 30 of the forme roll 28; this frame is biased downwards by springs 31. With this arrangement the roll 28 contacts the forme 1 simultaneously with sheet take-off by the mechanism 7; alternatively, a separate drive may be provided, and the roll 28 may then contact the forme on the return stroke of the carriage 2. The drive (b), through the cam and roller mechanism 42, 43, also oscillates the transfer roll 57 of the second group of inking rolls 51, 55, 56, 58, via a link 60 and arm 59 of the oscillating frame of the roller 57; the frame is spring-loaded clockwise, whereby the roller 43 is kept in contact with the cam 42. The drive (c) is used to reciprocate the roll 23, the latter being keyed to its shaft with axial freedom; the second gear of the 4-gear train is an internally threaded wide gear mounted on an externally threaded fixed sleeve surrounding one end of the shaft of the roll 23, whereby as the carriage 2 reciprocates the wide gear is screwed to and fro along the sleeve, this movement being transmitted through a ball race to the roll 23. The forme roll 28 is mounted in adjustable eccentric bearings in its swinging frame 30, whereby its position relative to the roll 23 may be adjusted; the screw 33 is used to adjust it relative to the forme 1. The steel roll 56 is adjustable about the axis of the roll 55.