Method and apparatus for transporting flat products
View Patent ↗During the transport of flat products, in particular folded products which are transferred at the end of a transport path to an assembly which forwards them, a great degree of freedom from faults can be attained by the fact that, in the case of lower transport speeds, the products are accelerated during the transfer by air which passes along them at a higher speed in the transport direction than the transport speed. In the case of higher transport speeds, the products are expediently braked during the transfer by reducing the pressure in the gap between one of their surfaces and an adjacent guide surface.
1. An apparatus for transporting a flat product, comprising:
a transport gap which is formed by conveying elements which are moved in a transport direction and lie opposite one another, wherein the flat product is supplied to the transport gap which is delimited on at least one side by at least one stationary guide plate in a region of an end of the transport gap which is assigned to a paddle wheel which forwards the flat product and is moved transversely with respect thereto;
wherein the transport gap is assigned air nozzles which act on the flat product coming out of the transport gap, wherein the air nozzles have a jet direction which is substantially parallel to a transport plane and points in the transport direction, and wherein a compressed air source coupled to the air nozzles via a supply line supplies compressed air to the air nozzles and wherein compressed air from the air nozzles has a higher speed in the transport direction than a transport speed of the flat product such that the flat product is accelerated by the compressed air.
2. The apparatus according to claim 1 , wherein the air nozzles are included in a surface of the at least one stationary guide plate which extends over a width of the transport gap.
3. The apparatus according to claim 2 , wherein the at least one stationary guide plate is provided with a tongue which engages into a groove of a belt deflection roller.
4. The apparatus according to claim 2 , wherein the air nozzles are arranged in a form of a plurality of nozzle rows which extend in the transport direction and which are distributed over a width of the at least one stationary guide plate.
5. The apparatus according to claim 4 , wherein each of the plurality of nozzle rows is contained on a respective plate, wherein the plates are arranged flush with a transport gap-side surface of the at least one stationary guide plate, wherein the plates are configured as a base of a spreader box which is connected to the supply line, and wherein the plates are inserted into the at least one stationary guide plate.
6. The apparatus according to claim 5 , wherein the plates have a plurality of cut-out tongues which point in the transport direction and a plurality of recess-shaped depressions which surround respective tongues and wherein the respective tongues and depressions form the air nozzles.
7. The apparatus according to claim 1 , wherein a spacing of the air nozzles in the transport direction is unequal and increases.