Conveyors: power-driven – Conveyor section – Conveyor for signatures
Reexamination Certificate
2000-02-10
2001-11-27
Ellis, Christopher P. (Department: 3651)
Conveyors: power-driven
Conveyor section
Conveyor for signatures
C271S303000
Reexamination Certificate
active
06321902
ABSTRACT:
FIELD OF THE INVENTION
The invention-relates to a device for rerouting signatures clamped between first and second conveyor belts. A guide wedge system extends transversely to the conveying direction of the conveyor belts. The conveyor belts ride on different conveying tracks.
A device for dividing a flow of signatures into two partial flows is known from EP 0 254 037 A1. This is accomplished in that conveyor belts, between which the signatures are clamped, respectively rest against the circumference of two oppositely disposed control rollers, which are eccentrically and rotatably seated. The two control rollers oscillate in a timed manner and alternatingly push the signatures via the conveyor belts against a deflection edge of a guide wedge. From there, they reach a first, or respectively a second conveying track.
Furthermore, a device for sorting sheets of paper or the like, which are guided between conveyor belts, is known from DE-PS 1 223 682, wherein one of two conveying tracks is selectively blocked. This is accomplished in that a deflection member pushes the conveyor belts against a guide face of a guide wedge. At that time, the second conveying track is open.
DE 3210 C discloses a sheet distributor by means of belt systems and a wedge arranged between them. This wedge is pivotably arranged as a shunt between belts of the belt system.
The object of the present invention is based on providing a device for rerouting signatures in a flow of signatures into two partial flows on two conveying tracks.
In accordance with the present invention, this object is attained by providing first and second conveyor belts which clamp the signatures and move them in a conveying direction from an infeed conveying track to a first conveying track and a second conveying track. A guide wedge extends transversely to the conveying direction and has upper and lower guide surfaces. The belts move on different conveying tracks which are typically formed on the guide surfaces of the guide wedge.
The advantages to be achieved by the present invention consist, in particular, in that the front edges of the signatures do not push against the deflection edge of the guide wedge, where they could cause a pile-up in this way. The service life of the conveyor belts is increased, because they need not drive any control rollers.
If thick signatures—for example with 64 pages—are to be rerouted, it is advantageous if the base circle of at least one of the two cam disks, or respectively cam rollers, having the radius r
1
, or respectively r
4
, on which the high cams have been placed, has a multiply larger diameter with several taller cams than the other cam roller arranged opposite it and working together with it. Only slightly harmful displacement forces between the inner and outer layers of the signatures are then created in the course of deflecting, i.e. during the directional change of the signatures.
REFERENCES:
patent: 4373713 (1983-02-01), Loebach
patent: 4650174 (1987-03-01), Stobb
patent: 6145649 (2000-11-01), Belanger et al.
patent: 6186489 (1999-04-01), Bredenberg et al.
patent: 6213461 (2001-04-01), Ratz et al.
patent: 3210 (1878-05-01), None
patent: 1223682 (1967-03-01), None
patent: 3424389 A1 (1985-03-01), None
patent: 0254037 A2 (1988-01-01), None
Ellis Christopher P.
Jones Tullar & Cooper PC
Koenig & Bauer Aktiengesellschaft
Sharma Rashmi
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