Sheet feeding or delivering – Feeding – By means to change direction of sheet travel
Patent
1994-08-03
1995-07-18
Bollinger, David H.
Sheet feeding or delivering
Feeding
By means to change direction of sheet travel
271280, 271286, 271184, B65H 500
Patent
active
054334306
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a device for conveying and separating folded printed products which are supplied on a conveyor device in a scale-shaped flow, wherein at least two printed products are laterally offset in respect to each other, wherein a conveying member is disposed on each side of the scale-shaped flow and wherein these conveying members move away from each other and pull the printed products apart.
A device of this species is known from CH-A-634 530. It has two parallel conveying members embodied as chains, which have clamping rollers for grasping the edges of the printed products. To pull the printed products, which are folded inside each other, apart, the chains are guided away from each other in rails. A similar device is known from DE-A-24 17 614. Here, movable grippers are provided for grasping and pulling apart the printed products folded inside each other. Both devices are respectively set for a defined width of the scale-shaped flow. Conversion to another width would be very expensive.
SUMMARY OF THE INVENTION
It is the object of the invention to provide a device of the species mentioned, by means of which it is possible to convey scale-shaped flows of varied width. Conversion is intended to be possible very simply and rapidly. In addition, the device is also intended to be suitable for separating scale-shaped flows with more than two printed products which are folded inside each other or lie on top of each other. This object is attained in the device in accordance with the species in that a first conveying member has a gap, which is engaged by the front end of the other, second conveying member, which conveys obliquely in respect to the first conveying member and has a lower pull-off belt and an upper pull-off belt, and that the front end of the upper pull-off band can be telescopically adjusted in the conveying direction of the second conveying member.
With the device in accordance with the invention it is only necessary to adjust the front end of the upper draw-off belt to adapt it to the width of the scale-shaped flow to be separated. Depending on the width of the scale-shaped flow, the front end of the upper draw-off belt enters the gap of the first conveying member more or less deeply. The printed products are not bent when they are drawn out and therefore are more gently treated than was customary up to now. In addition, the device is considerably more cost-effective and has a small space requirement. The protruding edges of the printed products to be pulled out of the scale-shaped flow are grasped by the two draw-off belts and are conveyed between the two draw-off belts obliquely in respect to the first conveying member to a further conveying member. The printed products are grasped flat between the two draw-off belts and are securely guided throughout the entire pull-off process. By means of this it is also possible to separate scale-shaped flows wherein the printed products have very unusual formats. In addition, it is assured that electrostatic adhesion between the printed products does not result in a malfunction. It has been shown that with the device in accordance with the invention the offset can be considerably less than the offset of the printed products which are folded inside each other or disposed on top of each other which was customary up to now. The separation of a scale-shaped flow consisting of two or more partial scale-shaped flows disposed on top of each other and laterally offset is also possible. It is possible by means of this to increase the conveying capacity in a cost-effective manner. Further advantageous characteristics ensue from the dependent claims, the subsequent description and the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
An exemplary embodiment of the invention will be described in detail by means of the drawings. Shown are in:
FIG. 1, a partial view of the device in accordance with the invention,
FIG. 2, a partial view of the device in accordance with the invention with a scale-shaped flow placed on it,
FIG. 3
REFERENCES:
patent: 3334723 (1967-08-01), Reed et al.
patent: 4319675 (1982-03-01), Turnbough
patent: 4572350 (1986-02-01), Besemann
patent: 4986730 (1991-01-01), Wetter
patent: 5112041 (1992-05-01), Honegger
patent: 5323892 (1994-06-01), Strassler et al.
Fritsche Beat
Straessler Rene
Bollinger David H.
Grapha-Holding AG
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