Sheet feeding or delivering – Delivering – Multiple discharge
Patent
1999-05-28
2000-10-10
Bollinger, David H.
Sheet feeding or delivering
Delivering
Multiple discharge
271303, B65H 3910
Patent
active
061293520
DESCRIPTION:
BRIEF SUMMARY
FILED OF THE INVENTION
DESCRIPTION OF THE PRIOR ART
The present invention relates to a device for distributing a flow of signatures. The signatures are divided into two partial flows or steams by first and second rotating cam rollers, a guide tab or tongue, and a conveyor belt system which includes two conveyor belts.
EP 00 54 963 B1 has disclosed a device for distributing a flow of signatures or the like into two partial flows of signatures using a first rotating cam roller with cams and second a second rotating roller with cams.
The cams of the two cam rollers mesh with each other to form a nip with a conveyor belt system, comprised of first conveyor belts near the first cam roller and conveyor belts near the second cam roller, which jointly exert a clamping action on the signatures. After passing through the nip, the first and second conveyor belts diverge from each other to form an outlet nip region. In the outlet nip region, a cross sectionally wedge-shaped guide tab is provided, with its sharp edge pointing into the nip.
SUMMARY OF THE INVENTION
The present first and second conveyor belts respectively travel along guide faces of the guide tab, spaced apart from them.
EP 02 54 037 A2 describes a device for distributing a flow of signatures by means of a conveyor belt system. In this connection, the conveyor belts are deflected by means of eccentric rollers.
The object of the invention is to produce a device for distributing a flow of signatures into two partial flows of signatures.
This object is attained according to the invention by the use of a device which utilizes a pair of rotating cam rollers and a conveyor belt system. The conveyor belt system has first and second conveyor belts which exert a clamping force on the signatures after they have passed through the nip that is defined by the cam rollers. The two conveyor belts diverge from each other and form an outlet region. The two conveyor belts can be moved to distribute the flow of signatures into two partial flows of signatures.
The advantages that can be attained with the invention are comprised in that two rollers provided with cams on their circumference faces can perform several functions at the same time. In addition to the distribution of a flow of signatures into two partial flows of signatures, a direction change of the signatures can be executed without additional guide rollers being required for the conveyor belts. A direction change and distribution of signatures is required when as a result of excessive production speed, a signature flow cannot be processed in a single subsequent unit and consequently must be divided into two partial signature flows, e.g. must be processed further in separate longitudinal folding devices--second longitudinal fold --disposed one above the other.
The circumferences or control faces of the two cam rollers are also used for belt guidance so that separate belt guides can be eliminated. Furthermore, particularly in the processing of thick signatures, it is advantageous if a second one of the two cam rollers has a larger circumference than a first one of the two cam rollers.
It is advantageous that a roller for deflecting the conveyor belt system is wound around by the conveyor belt system by at least 45.degree.. Consequently, a reliable guidance of the signatures is assured.
It is also advantageous that the roller for deflecting the conveyor belt system has a circumference length which is at least three times the maximal length of the signatures to be transported.
As a result, less damaging movement forces are produced between the inner and outer layers of the signatures when they are deflected, i.e. in the direction change.
BRIEF DESCRIPTION OF THE DRAWINGS
A preferred embodiment of the present invention is depicted in the drawings and will be described in more detail below.
FIG. 1 shows a cross section through a device for distributing a flow of signatures in a first working of the device, with the clearing of a first transport path for the signatures;
FIG. 2 shows a device according to FIG.
REFERENCES:
patent: 4008891 (1977-02-01), Buys
patent: 4373713 (1983-02-01), Loebach
patent: 4538800 (1985-09-01), Richter
patent: 4729282 (1988-03-01), Kasdorf
patent: 5702100 (1997-12-01), Novick et al.
Bollinger David H.
Koenig & Bauer--Albert Aktiengesellschaft
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