Apparatus for the supply of bags

Details Apparatus for the supply of bags Apparatus for the supply of bags

1999-05-25

2001-01-23

Valenza, Joseph E. (Department: 3651)

Conveyors: power-driven

Conveyor section

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

C198S817000, C053S459000, C053S468000, C053S384100

Reexamination Certificate

active

06176366

ABSTRACT:

The invention is directed at an apparatus with which bags are supplied to a magazine where the opening and filling thereof take place. Such an apparatus has already been proposed, in which two roller chains carry the stacks of bags from the loading point to the opening point thereof. The two chains are driven by means of a common shaft. On the side where the bags are open the chain has pins by means of which the bags are stripped with the projecting flap thereof. Holes are provided in the link plate. The groups of pins are uniformly distributed round the chain circumference. The spacing of the individual pin groups is a function of the widest bag and the chain length. The second, parallel-running chain conveys the bags to the opposite end thereof, i.e. the floor. Here again use is made of an angular link plate chain. To prevent sliding of the bags during conveying, driving pins are screwed into bearing blocks between the stacks.
The problem of the invention is to provide an apparatus for the supply of bags, which has a greater storage volume for the same chain size.
To solve this problem the invention proposes an apparatus having the features of claim
1
. Further developments of the invention form the subject matter of the dependent claims, whose wording, like that of the abstract are, by reference, made into part of the content of the description.
Through the provision of a plurality of holders, the holding members can be fitted to a very large number of points on the revolving or rotating conveyor, so that the conveyor length is better utilized and consequently more stacks of bags can be housed.
According to a further development of the invention the holding members are detachably received in the holders. Thus, on changing the bag size, the holding members can be adapted to the new bags by using them in corresponding holders.
The invention in particular proposes that the holders are arranged in a grid spacing arrangement smaller than the dimensions of the bags measured in the conveying direction and which is in particular small compared with said dimensions. If the conveyor is constituted by a revolving chain, the grid spacing arrangement can e.g. correspond to the length of a single chain link. This makes it possible to reduce the spacing between successive stacks of bags to the size of said grid spacing. According to a further development of the invention the holders are constructed in such a way that the holding members can be released therefrom by running up onto a stop member. This makes it possible to remove from the apparatus a bag stack or the remainder of a bag stack if the top bag cannot be opened.
According to a further development of the invention the holding members are constructed in pin-like manner and in particular as small tubes, i.e. hollow. As a result the holding members are very light and due to their limited weight and their not very great stability they give rise to a reduced injury risk, so that only simpler protective measures are needed for the apparatus. This more particularly applies if the holding members can be released by simply sliding out of the holders.
According to a further development of the invention the holding members secure the bags in that they are slipped or inverted over the holding members using holes.
It can in particular be provided that the holding members have a head shaped like an inverted frustum. This on the one hand prevents an undesired release of a bag, but without preventing its desired release for filling purposes.
According to the invention the holding members have a widened foot with which they can be fixed in the holders. The holders can engage on the shank of the holding member, whilst the widened foot is inserted under a part of the holder and can only be removed in a specific direction.
According to a further development of the invention the holding members can be inserted in the holders in a direction which slopes or is at right angles to the conveying direction. They can be slid out again in the same or the opposite direction.
According to the invention a second conveyor can be positioned parallel to the first conveyor, which can e.g. be constructed as a revolving chain, a revolving belt, a revolving strap or the like.
In particular, the second conveyor can be driven synchronously to the first.
According to the invention the second conveyor can also have receptacles for holding members and in particular the same receptacles for the same holding members. They are consequently used in holders in such a way that they enclose the stacks of bags pairwise between them. Thus, also at high conveying speeds a lateral sliding of the bags is prevented.
The bags can e.g. be arranged in such a way that they are held on the first conveyor and roughly in the centre of their length rest on the second conveyor. The remainder of the bag can then hang down over the second conveyor. According to the invention, in the case of larger bags the apparatus can have a bearing rail parallel to the conveyor or conveyors, so that the bags are simply supported.
According to the invention, for adapting to different bag sizes, the spacing between the first and second conveyors can be adjustable, as can the spacing between the first conveyor and the bearing rail. It can in particular be provided that on adjusting the spacing between the two conveyors there is a simultaneous modification to the spacing with respect to the bearing rails, so that they are e.g. always located centrally between the conveyors.
According to the invention, considered in the conveying direction behind the point where the bags are opened and removed, a sliding out device is provided for those bags or bag stacks, which are faulty or behave in a faulty manner. It is also possible to slide out here the then no longer required holding members. This sliding out device can in particular be a sloping stop member, in which the sliding out action is achieved in that the conveyor moves the holding members against the sloping surface.


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German Search Report dated Sep. 13, 1999 for 99109913.6-2308.

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