Apparatus and method for leading together a number of printed webs
View Patent ↗An apparatus and method for leading together a number of printed webs is disclosed. Using a device for leading together several printed webs into a multi-layer web sandwich with a harp formed by the deflection rolls assigned to the individual printed webs, the inclusion of air between the webs can be prevented, in that a deflecting web sandwich guide is provided in the exit area of the harp and lies at right-angles to the running direction of the web sandwich.
1. An apparatus for leading together several printed webs into a multi-layer web sandwich with a harp formed by deflection rolls assigned to the individual printed webs, wherein a two lowest deflection rolls of the harp are drivable, wherein the driveable two lowest deflection rolls of the harp are each overlapped by a respective single web of the several printed webs and wherein the harp is positioned ahead of a fold former, wherein a deflecting web sandwich guide is provided in an exit area of the harp and is formed by the two lowest deflection rolls of the harp, and wherein the deflecting web sandwich guide guides a path of the multi-layer web sandwich in a deviation from a straight-line running direction of the web sandwich.
2. The apparatus according to claim 1 , wherein an S-shaped web sandwich guide is provided in the exit area of the harp.
3. The apparatus according to claim 1 , wherein the two lowest deflecting rolls are slightly and mutually overlapping.
4. The apparatus according to claim 3 , wherein the mutually overlapping deflection rolls are so arranged that an extent of lapping by the web sandwich amounts to 5 to 15°.
5. The apparatus according to claim 4 , wherein the mutually overlapping deflection rolls are so arranged that the extent of lapping by the web sandwich amounts to 10°.
6. The apparatus according to claim 1 , wherein the driveable two lowest deflection rolls of the harp are overlapped by the respective single web of the several printed webs at an angle of at least 60°.
7. The apparatus according to claim 6 , wherein the driveable two lowest deflection rolls of the harp are overlapped by the respective single web of the several printed webs at an angle of 90°.
8. An apparatus for leading together a plurality of printed webs into a multi-layer web sandwich, comprising:
a harp formed by deflection rolls, wherein a two lowest deflection rolls of the harp are drivable, wherein the driveable two lowest deflection rolls of the harp are each overlapped by a respective single web of the plurality of printed webs and wherein the harp is positioned ahead of a fold former; and
a deflecting web sandwich guide provided in an exit area of the harp, wherein the deflecting web sandwich guide is formed by the two lowest deflection rolls of the harp and guides a path of the multi-layer web sandwich in a deviation from a straight-line running direction of the web sandwich.
9. The apparatus according to claim 8 , wherein the deflecting web sandwich guide is S-shaped.
10. The apparatus according to claim 8 , wherein the two lowest deflection rolls are displaced relative to one another in the straight-line running direction of the web sandwich and overlap each other at a right angle to the straight-line running direction.
11. The apparatus according to claim 8 , wherein the deviation is between 5 and 15°.
12. A method for leading together a plurality of printed webs into a multi-layer web sandwich, comprising the steps of:
leading together the plurality of printed webs into the multi-layer web sandwich by a harp formed by deflection rolls, wherein a two lowest deflection rolls of the harp are drivable, wherein the driveable two lowest deflection rolls of the harp are each overlapped by a respective single web of the plurality of printed webs and wherein the harp is positioned ahead of a fold former; and
guiding a path of the multi-layer web sandwich in a deviation from a straight-line running direction of the web sandwich by a deflecting web sandwich guide provided in an exit area of the harp, wherein the deflecting web sandwich guide is formed by the two lowest deflection rolls of the harp.
13. The method according to claim 12 , wherein the two lowest deflection rolls are displaced relative to one another in the straight-line running direction of the web sandwich and overlap each other at a right angle to the straight-line running direction.
14. The method according to claim 12 , wherein the deviation is between 5 and 15°.