Newspaper stacking plant

In a newspaper stacking plant a sensor is placed at a point along the newspaper path. After counting a predetermined number of newspapers, the sensor control electronics actuate a first intercepter means to provide a gap in the newspaper flow. The subsequent newspapers are led to a first collection station such as a stacking blade. The sensor control electronics also control a second intercepter such as a deflecting tongue entering the newspaper flow on actuation, at a point between the first intercepter and the first collection station, a predetermined number of newspapers being diverted and led to a second collection station. The inventive device enables machine diversion of small portions from the newspaper flow to the second collection station, while the major portion is led to the first collection station.

The present invention relates to a plant for stacking newspaper and is of 
the kind including an input path for a flow of newspapers overlapping each 
other, a newspaper counter or sensor at a place along the path and 
connected to control electronics which are settable to count a selectable 
number of newspapers and connected to an intercepter means to activate the 
latter and provide a gap in the flow of newspapers so that the selected 
number of newspapers can be directed further and delivered to a collection 
point such as a stacking blade. 
In plants known up to now of the kind in question, the least stack of 
newspapers which can be formed is entirely dependent on the cycle time of 
the stacking means. In practice, this cannot fall below 1.0 sec. with such 
means known to the art. In its turn, this means that the smallest stack 
which can be formed at a press speed of 60,000 copies per hour is one of 
17 copies. Stacks with a lesser number of copies must be made by hand. The 
number of such manually laid stacks is relatively large in most newspaper 
printing rooms, and the manual working time therefore results in 
corresponding increased labour costs and reduced production capacity. 
The object of the present invention is therefore to provide a stacking 
plant with means enabling machine stacking of small stacks having a small 
number of copies right down to one or several copies, independent of the 
prevailing printing speed. 
This is achieved with a plant of the kind in question which, in accordance 
with the invention, has the characterizing features disclosed below.

A flow 10 of newspapers overlapping each other are fed into the plant in a 
manner known per se. 
The newspapers on the input path 11 are counted by a conventional newspaper 
counter or sensor 12. When a predetermined number of newspapers, e.g. 25 
copies, have passed the sensor, it provides an impulse which activates an 
interceptor means 13, this means then providing a gap in the flow of 
newspapers. The predetermined number of newspapers after the gap are led 
away and are collected into a stack 15 or a so-called pack at a collection 
station in the form of a stacking blade 14, and when the stack 15 is 
ready, the stacking blade is actuated, whereafter the pack falls down into 
a reversing basket 16 in a manner known per se. After each pack has been 
dropped into the basket, the latter is actuated to rotate 180.degree.. 
When two packs for example, i.e. 50 copies in this case, have been stacked 
to a ready stack in the basket, a pusher 17 is actuated to swing the 
basket in a manner known per se, so that the ready stack is thrust out to 
the right or to the left in the figure for discharging from the plant. 
In accordance with the invention, a second intercepter means 18, e.g. in 
the form of a deflecting tongue, may be coupled into the flow of 
newspapers at a place situated along the newspaper path between the first 
intercepter means 13 and the collection station or stacking blade 14. 
The intercepter means 18 is controlled by the sensor 12 and when actuated 
it is adapted to interrupt the flow of newspapers to deflect a 
predetermined number of newspapers, which lie between said gap in the 
newspaper flow and the means 18, to an outlet path 19 leading the 
predetermined number of newspapers to a second collection station 
comprising a stacking table 20, in the illustrated example. When the 
desired stack has been formed on the table, it is thrust out with the aid 
of a pusher 21. 
The apparatus in accordance with the invention functions in the following 
manner. 
Let it be assumed that it is desired to form a stack of 25 copies in the 
usual way in the basket 16, and that it is further desired to lay off a 
stack of 8 copies, for example, on the table 20. The electronics are then 
coupled in for this purpose such that the sensor 12 counts 25+8=33 
newspapers before the intercepter means 13 is activated to form a gap in 
the usual way. 
These 33 copies continue their path, and when 25 copies have passed the 
intercepter means 18, said means receives an impulse from the control 
electronics connected to the sensor 12 so that it is activated for 
deviating the following 8 copies to the output path 19 for collection on 
the table 20. When the last of these 8 copies has passed the means 18 with 
the aid of the deflecting tongue, the tongue is caused to return to its 
original position, so that subsequent newspapers will go to the stacking 
blade 14 to form a new large stack. This new large stack of 25 copies of 
newspaper can naturally also be combined with one or more projecting 
newspapers, which may be deflected to the output path 19 and the table 20 
in the simple manner described above. 
In accordance with the invention, it is thus possible to deflect a number 
of newspapers to the path 19 and the table 20, it being possible to select 
this number from one copy up to the number which is the minimum size of a 
stack which can be formed in the large stack section, independent of the 
prevailing printing press speed. In accordance with the invention, it is 
thus possible to prepare all appropriate stack sizes completely by 
machine.