Newspaper conveyor

Details Newspaper conveyor Newspaper conveyor

1995-03-15

1996-11-19

Bidwell, James R.

Conveyors: power-driven

Conveyor section

Unit load conveying surface means moved about an endless or...

1988037, B65G 4786

Patent

active

055753795

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

1. Field of the Invention
The invention relates to a newspaper conveyor.
2. Description of the Prior Art
Newspaper conveyors of this kind serve speedy transport of newspapers or parts thereof between various processing stations such as e.g. folding station, supplement insertion station and bundling station within a newspaper printing press. On such a newspaper conveyor a plurality of grips is employed for each newspaper at a time, with which the newspaper is transported along the corresponding conveyor, clamped between one fixed and one movable clamp each.
Various designs are known for the grips which from the point of view of design and actuating mechanism are all relatively complicated. For instance, designs are known which actuate the movable clamp by means of a complicated spiral spring mechanism which in the opening position of the movable clamp lock the latter in place. Furthermore, designs are on the market in which the movable clamp, in opening and closing, executes a swivel movement not only about one, but about two swivel axes located roughly at right angles to each other.


SUMMARY OF THE INVENTION

The object of the invention is to improve a newspaper conveyor of the kind specified as regards its grips so that they may be employed variably whilst reducing the complication in design.
This object is achieved by the features described in the following specification, according to which in employment of the grips, selection may be made between the two stated opening positions so that--if, for instance, only a brief opening of the grip is desired--it may be opened via a corresponding cam control curve only for a small period of time, to release the newspaper and subsequently move on to its closed position, but empty. If the movable clamp is required to remain open, it merely needs to be translated into the second opening position, in which it is held open self-lockingly by friction contact in a particularly simple design by means of a locking spring in the form of a leaf spring.
One especially advantageous embodiment of the subject matter described in the following specification. Due to the two-part configuration of the movable clamp and the relative swivelling action of the thereby created control part with respect to the clamp part a precise and speedy initiation of the opening movement of the clamp is possible. This is due to the control part being deflectable with the aid of a cam control curve on the conveyor without it having to initially work against the loading of the leaf spring producing the closing pressure. It is not until the maximum swivel angle of the control part is achieved with respect to the clamp part that the latter is moved together with the control part and translated into one of the opening positions against the pressure of the leaf spring. Accordingly, every newspaper grip can be opened with no problem and as wanted even in the case of conveyor chains running at very high speeds.


BRIEF DESCRIPTION OF THE DRAWINGS

Further features, details and advantages of the invention will be apparent from the remaining subclaims and the following description of the example embodiments of the subject matter of the invention with reference to the enclosed drawing, in which:
FIG. 1 is a schematic partial side view of a newspaper conveyor according to the invention having two grips shown in the closing position and in the self-lockingly held-open position.
FIG. 2 is a schematic partial side view of a newspaper conveyor according to FIG. 1 showing the grip in a position of the movable clamp held-open by a cam control curve.
FIG. 3 to FIG. 6 are sections disposed in the swivel plane of the movable clamp through the grips of a second embodiment shown in the closing position and in various opening positions.
FIG. 7 is a section through a clamp part of the newspaper grip as shown in FIGS. 3 to 6 disposed in the swivel plane.
FIG.8 is a view of the clamp part in the direction of the arrow VIII as shown in FIG. 7.
FIG. 9 is a partially sectioned side view of a control

REFERENCES:
patent: 2530412 (1950-11-01), Wallace
patent: 4381056 (1983-04-01), Eberle
patent: 5178262 (1993-01-01), Merkli et al.
patent: 5360101 (1994-11-01), Carlen
patent: 5388820 (1995-02-01), Eberle et al.
patent: 5395151 (1995-03-01), Eberle

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