GB1169910A - Printing Press - Google Patents

Abstract

1,169,910. Printing press. CHANDLER & PRICE CO. 28 Dec., 1966 [17 Jan., 1966], No. 57945/66. Heading B6C. A printing press comprises a plate cylinder, ink and water fountains, each fountain assembly including a fountain roller and a roller train leading to the plate cylinder with a messenger roller mounted for movement between the fountain roller and the roller train, and twostroke drive means including a walking beam operative to rotate each fountain roller with its associated messenger roller thereagainst on one stroke, and to shift each messenger roller against its associated roller train on the return stroke. General arrangement.-Fig. 1 illustrates a press in which webs 16 and 17 are fed from web rolls 14 and 15 over sensing rollers 20, 21 and are perfected by printing assemblies 2, 3 before being led over compensating adjustable roller assemblies 23, 24 and idler 25 and then cut and folded transversely by folding unit 4. The main drive motor 27 drives shaft 28 from which the folder unit 4 is driven by chain 29 and the printing units are driven by means of gear-box 30 and chain 31. The printing assemblies consist of four identical units 35, 36, 37, 38; for example, unit 36, Fig. 3, comprises a plate cylinder 41 with associated blanket cylinder 40, the web 16 passing vertically upwards between the blanket cylinders 40 of both units 35 and 36. Inking and damping apparatus.-Ink forme rollers 42, 43 are inked by a vibrator roller 44 which contacts with a rubber-covered transfer roller 45 which, in turn, contacts a copper vibrator roller 46. A messenger roller 47 mounted on arms 48 secured to pivot shaft 49 oscillates between the roller 46 and the ductor roller 50 running in the ink fountain 51; the vibrator rollers 44, 46 are caused to reciprocate axially by a rockshaft and yoke arrangement (not shown). Similarly water is applied to the plate cylinder 41, Fig. 1, by means of fountain roller 54, messenger roller 55, copper vibrator roller 56 and a molleton-covered roller 57, the messenger roller being mounted on a pair of arms (58) on a pivot shaft (59) (Fig. 5, not shown). Fountain drive mechanism.-A walking beam 71, Fig. 1, is driven from the gear-box 30 by means of a chain and sprocket system (Fig. 2, not shown). The beam 71 rocks about central pivot (72) and causes links connected to its opposite ends to reciprocate. The connected links (74), (78), (82) and (86) on one side operate ink and water fountain mechanisms (76), (80), (84), (88); on the other side connected links (75), (79), (83), (87) operate mechanisms (77), (81), (85), (89). Blanket cylinder.-Each blanket cylinder 40 (Fig. 7) is provided with a longitudinal recess 162, metallic strips 165 and 166 secured to the edges of blanket 160 and folded about them to provide metallic enclosed edges of at least double thickness and an elongated T-bar 161 secured in the recess 162 and engaging the metallic enclosed edges operative to lock the blanket to the cylinder. Each metallic strip 165, 166, preferably of aluminium, is first folded about an edge of the blanket to provide different strip widths on each side of the blanket and the end is then folded again about the edge of the strip having the narrower width (Figs. 8, 9, not shown).