Sheet feeding or delivering – Delivering – Rotary conveyor
Patent
1998-01-09
1999-11-02
Terrell, William E.
Sheet feeding or delivering
Delivering
Rotary conveyor
270 3909, 270 60, B65H 2920
Patent
active
059755253
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a paddle wheel for delivering folded products in a scale-like or shingled flow or orientation.
DESCRIPTION OF THE PRIOR ART
A device for receiving printed products from a folding apparatus and for delivering them to a conveyor belt is known from EP 0 164 440 B1. In this prior art device the printed products are received between two paddles of several paddle wheels, which paddle wheels are spaced at a distance from each other in the axial direction. For braking an incoming printed product, a pre-stressed lever arm is hingedly fixed in place on the hub of the device in the vicinity of the bottom of a paddle wheel pocket located between two paddles.
However, it is disadvantageous in connection with this device that, because of their low mass, thin printed products in particular are difficult to insert between the lever arm and the paddle, which results in irregularities in the alignment of products placed on the delivery belt.
A device for stacking sheet-shaped objects is known from EP 0 104 383 B1, wherein at least one of the several identical paddle wheel disks, which are spaced apart from each other, is turned with respect to the other paddle wheel disks in such a way that the spaces between the paddle wheel pockets of the various paddle wheel disks are no longer aligned with each other. Because of this the front edge of the sheet-shaped objects in particular is made wavy and is therefore clamped. However, this can only be accomplished in connection with thin products, wherein these thin products are possibly permanently deformed in an undesirable manner at their front edge.
In accordance with another embodiment of the above mentioned EP 0 104 383 B1, the paddle wheel pockets of at least one paddle wheel disk have elastic boundary walls which utilize, for example leaf springs, for clamping the products on the front. In this case, the same as in connection with EP 0 164 440 B1, it is disadvantageous that, in particular because of their low mass, it is difficult to guide thin products in a gap between the pre-stressed leaf spring and a paddle, or respectively to deliver them in the correct position. It is not possible by use of this device to correctly deliver products of variable thickness.
SUMMARY OF THE INVENTION
It is the object of the present invention to create a paddle wheel for delivering folded products.
This object is attained in accordance with the invention by utilization of a paddle wheel for the delivery of folded products in which the paddles, which cooperate to form product receiving pockets, are slightly curved and overlap one another. A leaf-spring-like guide strip is situated at the outside of each pocket. A first end of each such guide strip is secured to the paddle lip and a second end of each guide strip ends in the vicinity of the pocket bottom. This second end of each guide strip can be moved radially with respect to the paddle wheel to effectively vary the width or thickness of the inner end of the product receiving product. An actuating assembly is provided to vary the radail location of the inner or second end of each guide strip.
The advantages which can be achieved by the present invention in particular reside in that the width or thickness of the opening of the paddle wheel pockets in the vicinity of the bottom of the paddle wheel pockets can be automatically adjusted. This bottom or inner pocket width thus can be matched to the thickness of the folded product to be delivered. Because of this, a width, or respectively a breadth, of the pocket bottom, which is always matched to the folded product, or respectively to the machine rpm, is set, so that a positionally correct transfer, or deposit, of folded products can take place in every case. A taper of the gap between the paddle and the guide strip prevents the folded products from snapping back or rebounding after reaching the paddle wheel pocket bottom. After their front edges have met the paddle bottom, the kinetic energy of thin folded products in particular can be
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Hartmann Manfred Wolfgang
Michalik Horst Bernhard
Koenig & Bauer--Albert Aktiengesellschaft
Terrell William E.
Tran Khoi H.
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