Web infeed device for rotary printing presses
View Patent ↗A web infeed device for rotary printing presses includes a pointed nose piece having concave side portions. The flexible infeed element is received in a guide, and driving elements are provided for driving the infeed element along the guide.
1. A web infeed device for rotary printing presses comprising:
an infeed element having a flexible band-shaped section and a rigid pointed nose piece connected to the flexible band-shaped section;
a guide having track curves, the infeed element being received in the guide;
the nose piece having rigid concave side portions, the concave side portions having two ends contacting the track, the concave side portions negotiating the track curves of the guide; and
driving elements for driving the infeed element along the guide.
2. The device as recited in claim 1 wherein the flexible band-shaped section includes a flat band-shaped metal piece.
3. The device as recited in claim 1 wherein the flexible section includes holes, and balls located in the holes.
4. The device as recited in claim 1 wherein the nose piece has a cut out at a rear end for receiving the flexible section.
5. The device as recited in claim 1 wherein the nose piece has a curved rear section.
6. The device as recited in claim 1 wherein the nose piece is symmetrical about a longitudinal plane, the flexible section defining the longitudinal plane.
7. The device as recited in claim 1 wherein the nose piece is fully symmetrical about a longitudinal axis at least in the region of the concave side portions so as to define a circular cross section perpendicular to the longitudinal axis.
8. A web infeed device for rotary printing presses comprising:
an infeed element having a flexible band-shaped section and a rigid pointed nose piece connected to the flexible band-shaped section, the nose piece being fully symmetrical about a longitudinal axis forward of the flexible section so as to define a circular cross-section perpendicular to the longitudinal axis;
a guide having track curves, the infeed element being received in the guide; the nose piece having rigid concave side portions, the concave side portions negotiating the track curves of the guide; and
driving elements for driving the infeed element along the guide.
9. The device as recited in claim 8 wherein the flexible section is metal.
10. The device as recited in claim 8 wherein the flexible section includes holes, and balls located in the holes.
11. The device as recited in claim 8 wherein the nose piece has a cut out at a rear end for receiving the flexible section.
12. The device as recited in claim 8 wherein the nose piece has a curved rear section.
13. The device as recited in claim 8 wherein the nose piece is symmetrical about a longitudinal plane, the flexible section defining the longitudinal plane.
14. A web infeed device for rotary printing presses comprising:
an infeed element having a first flexible band-shaped section, a second flexible band-shaped section, a connecting piece connecting the first band-shaped section to the second band-shaped section and a rigid pointed nose piece connected to the first band-shaped section;
a guide having track curves, the infeed element being received in the guide; the nose piece having rigid concave side portions, the concave side portions having two ends contacting the track, the concave side portions negotiating the track curves of the guide; and
driving elements for driving the infeed element along the guide.
15. The web infeed device as recited in claim 14 wherein the concave side portions are fully symmetrical about a longitudinal axis so as define a circular cross section perpendicular to the longitudinal axis.
16. The device as recited in claim 1 , wherein the nose piece includes a pointed front section, the concave side portions of the nose piece being longer than the pointed front section.
17. A web infeed device for rotary printing presses comprising:
an infeed element having a flexible band-shaped section and a rigid pointed nose piece connected to the flexible band-shaped section;
a guide having track curves, the infeed element being received in the guide;
the nose piece having rigid concave side portions, the concave side portions negotiating the track curves of the guide, wherein the nose piece is fully symmetrical about a longitudinal axis at least in the region of the concave side portions so as to define a circular cross section perpendicular to the longitudinal axis; and
driving elements for driving the infeed element along the guide.