Universal web turning system for guiding a traveling web (1, 21, 31, 41, 81, 91, 101) of material supplied from a web-type rotary printing machine,
- said traveling web defining a direction of web travel, an arriving portion, and a delivery portion,
- said system being capable of selectively guiding the web in any one selected mode as follows:
- (a) without turning over, without offset, and with maintenance of direction of travel, whereby the arriving and delivery portions will be in alignment;
- (b) without turning over with lateral offset, and with maintenance of direction of travel, whereby the arriving and delivery portions will be laterally offset with respect to each other;
- (c) turning over without offset, and with maintenance of direction of travel, whereby the arriving and delivery portions will be in alignment, but reversed side-for-side;
- (d) turning over, with lateral offset, and with maintenance of direction of travel, whereby the arriving and delivery portions will be laterally offset with respect to each other and reversed side-for-side;
- (e) without turning over and with reversal of direction of travel, whereby the delivery portion will travel parallel to, but in opposite direction of the arriving portion;
- and
- (f) turning over and with reversal of direction of travel, whereby the delivery portion will be reversed side-for-side with respect to the arriving portion, and will travel parallel to, but in opposite direction of, the arriving portion,
- said system comprising
- a frame structure (6, 7, 8) including longitudinal frame elements extending at right angles to the direction of travel of the arriving portion of the web;
- a first turning bar (2) deflecting said web at an angle with respect to the direction of travel of the arriving portion;
- a second turning bar (5, 85, 105) deflecting said web at an angle with respect to the direction of travel of the web at the delivery portion;
- a deflection roller (3);
- a deflection roller means (4);
- means (12, 15) for shiftably mounting said turning bars on said frame structure for selectively shifting the position of at least one turning bar, to-and-fro, in a shift path at right angles with respect to the direction of travel of the arriving portion of the web with respect to, and independently of, the other turning bar,
- said first and second turning bars (2;
- 5, 85, 105) being positioned on said frame radially staggered with respect to each other to permit passage of one bar over the other;
- said deflection roller (3) being rotatable about an axis parallel to the arriving portion of the web and being located laterally at a first side of said turning bars (2;
- 5, 85, 105);
- and
- said deflection roller means (4) being rotatable about an axis parallel to the arriving portion of the web and being located laterally at a second side of said turning bars (2;
- 5, 85, 105) opposite said first side,
- said first and second turning bars being selectively positionable in said frame in a first position for guide mode (a) in which said bars are parallel to each other and extend at an angle with respect to the arriving portion of the web, and with one turning bar (5) in vertical projection being next to the other turning bar (2) and, upon said arriving portion of the web being looped about said first turning bar (2) and said deflection roller (3) for reversing the direction of travel of the web thereover and said web then being passed around said deflection roller means (4) from below for again reversing the direction of travel of the web and then over said second turning bar (5);
- said first and second turning bars being selectively positionable in said frame in a second position for guide mode (b) in which said bars are parallel to each other and extend at an angle with respect to the arriving portion of the web and with one turning bar (5) being laterally offset or shifted (X1, X3) with respect to the other turning bar and upon said arriving portion of the web being looped about said first turning bar (2) and said deflection roller (3) for reversing the direction of travel of the web thereover and said web then being passed around said deflection roller means (4) for again reversing the direction of travel of the web and then over said second turning bar (5);
- said first and second turning bars being selectively positionable in said frame in a third position for guide mode (c) in which said bars are crossed with respect to each other, defining a cross-over point (CO), and extend at an angle with respect to the arriving portion of the web, said cross-over point being located in the middle of said turning bars, and, upon said arriving portion of the web being looped about said first turning bar (2) and said deflection roller (3) for reversing the direction of travel of the web thereover and said web then being passed directly around said second turning bar;
- said first and second turning bars being selectively positionable in said frame in a fourth position for guide mode (d) in which said bars are crossed over with respect to each other, defining a cross-over point (CO), extend at an angle with respect to the arriving portion of the web and with said cross-over point being located spaced from the middle of said first turning bar, and, upon said arriving portion of the web being looped about said first turning bar (2) and said deflection roller (3) for reversing the direction of travel of the web thereover and said web then being passed directly around said second turning bar;
- said first and second turning bars being selectively positionable in said frame in a fifth position for guide mode (e), in which said bars are crossed over with respect to each other defining a cross-over point (CO), and extend at an angle with respect to the arriving portion of the web and, upon said arriving portion of the web being looped about said first turning bar (2) and said deflection roller (3) for reversing the direction of travel of the web thereover and said web then being passed around said deflection roller means (4) for again reversing the direction of travel of the web and then over said second turning bar;
- and
- said first and second turning bars being selectively positionable in said frame in a sixth position for guide mode (f) in which said bars are parallel to each other and extend at an angle with respect to the arriving portion of the web and, upon said arriving portion of the web being looped about said first turning bar (2) and said deflection roller (3) for reversing the direction of travel of the web thereover and said web then being passed directly around said second turning bar (5).