US1555360A - Sack-filling apparatus - Google Patents

Description

Sept. 29, 1925.

F. s. DEROME SACK FILLING APPARATUS M. m J. 6 t, m wfl f w v 6 D J W M .E w d w W m a m .li. A

Patented Sept. 29, 1925.

UNITED STATES PATENT OFFICE.

FEBNAND STANISLAS nERoME, or BAvAY, FRANCE, ASSIGNOR r0 THE sooni'rn LES rILs DE A-DEROME, or BAVAY, FRANCE, A CORPORATION or FRANCE.

SACK-FILLING APPARATUS.

Application filed March is, 1925. Serial No. 16,015.

To all whom it may concern:

Be it known that I, FERNAND STANISLAS DEROME, a citizen of the French Republic, and a resident of Bavay, Department of Nord, France, have invented new and useful Improvements in Sack-Filling Apparatus, of which the following is a specification. I

The operations required for filling sacks with pulverulent or other products on a large scale, necessitate a fairly large working space and expensive labour; in fact, the sacks, after being filled with a load, weighed either beforehand or after the filling of the sack, have to be taken to a certain distance from the sack-filling station in order to be sewn up or tied, labelled and sealed, after which it is again necessary to lift them up in order to load them upon a conveyor device or other means of transport for carrying them to the point of delivery.

The present invention relates to an apparatus occupying a very small space in which these various operations are effected, and in which the final conveyor device for lifting or delivering the sacks is located in the immediate vicinity of the sack-filling stations.

This sack-filling apparatus consists of a rotary platform, at the circumference of which are arranged a certain number of stations each provided with a sack-filling cone or bin, which at a given point in the travel of the platform receives the weighed charge, the latter falling into the sack previously fitted upon the cone; the operator at this station proceeds with the different operations for the closing of the sack during part of the rotary movement of the platform, then allows the sack to fall upon a conveyor device and fits upon the filling cone a fresh sack in readiness to receive a new weighed charge, when the station in question comes back again under the weighing and distributing apparatus as a result of the rotation of the platform.

The apparatus comprises preferably a trap-door device, placed at each station, in such a way as to allow the operator to dump the filled sack upon the conveyor device after the various operations for the closure of the sack are completed.

The annexed drawing represents by way of example a form of construction of the invention.

Figure 1 is an elevation of the sack-filling apparatus.

Figure 2 is a plan view of the same.

Figure 3 is an elevation, partly in section, of the trap-door device.

Upon a raised platform a, revolving slowly around its axis a and running by means of rollers a upon a track a supported by a frame (1., there are arranged near its periphery a number of stations A corresponding to the contemplated production or output; each of these stations A comprises a seat 5 for an operator, in front of whom is a sackfilling bin or cone 0. 'Thelatter is intended to receive, at a definite point in the travel of the platform a, the previously weighed charge which falls directly into the sack which the operator has previously fitted beneath the filling cone 0. This delivery of the charge into the filling cone, and there- P fore into the sack, takes place when the station under consideration reaches the position A beneath the distribution hopper (l, supplied by automatic balances or scales regulated to the desired load.

While the platform performs in this way almost one complete revolution, the operator has time to tie up or to sew the filled sack, to label it and to seal it; then when he arrives at a given point A near the sack-fill ing point A a trap-door device dumps the finished sack upon a conveyor deviceconsisting of an inclined chute c placed beneath the revolving platform a. This conveyor device leads the sack to a suitable transporter f of any kind. During this time, the operator fits a fresh sack on the bottom of the filling cone 0, in readiness to receive the load for the fresh sack when a complete revolution of the platform has taken place, that is to say, when his station comes round to the point A beneath the distributing hopper (Z. The same applies for each of the operators at the other stations, so that the output of the apparatus is proportional to the number of stations.

As represented in Figure 3, the trap-door device allowing the dumping of the filled sack upon the conveyor device 6 after the closing operations are completed may present the following arrangement At each station, there is provided, in the floor of the revolving platform (I and in front of the operators seat 7), a pivoted trap-door 9 upon which the closed, labelled and sealed sack it rests. This trap-door g, pivoted at 9 opens instantaneously upon the operation of a pedal 9 placed within reach of the operator seated at Z) in front of the sack. A counter-weight 9 tends to return the trap-door 9 immediately to its closed position, and an automatic latch g prevents it from opening again of its own accord.

When the operator presses his foot upon the pedal 9 thus releasing the latch g, the weight of the sack it opens the trap-door g, which assumes the position represented in dotted lines, while the sack falls upon the inclined plane or chute e of the conveyor device. Thereupon the counterweight returns to its initial position and raises the trap-door g to the closed position in which it is retained by the latch 9 under the action of a spring 9 It is to be understood that this trap door device has been given only by way of example and that it might be replaced by any other suitable means, for example by a de vice for dumping the sack automatically upon the conveyor device when its different operations of closure are finished.

Likewise, instead of a single weighing and distributing device (Z, as represented in the drawing, the sack-filling apparatus might comprise two such devices arranged at diametrically opposite positions above the platform; in this case, the whole of the opera tions for closing the sacks would be performed in one half-revolution of the platform, and in this way two conveyor devices might be served, the completed sacks being dumped at two diametrically opposite points. There might also be utilized a larger number of these weighing and distributing devices (5, such devices as well as the necessary conveyors being arranged at suitably spaced positions around the periphery of the platform.

It is not necessary that the conveyor devices be located beneath the platform, since by raising the latter more or less the sacks can be delivered by oblique and movable chutes upon transporters situated at various horizontal distances from the site of the platform.

The improved sack-filling device reduces to a minimum the space occupied, as well as the labour necessary, since all lifting or handling of the sacks is obviated.

What I claim is:

l. A sack-filling apparatus, comprising a'rotary platform, a number of stations arranged at the circumference thereof, sack filling means at each station, material weighing and distributing means above the circular path of said stations, and discharging means for the filled sacks.

2. A sack-filling apparatus, comprising a rotary platform, a number of stations arranged at the circumference thereof, a sack filling cone at each station, material weighing and distributing means above the circular path of said stations, and discharging means for the filled sacks.

3. A. sack-filling apparatus, comprising a rotary platform, a number of statlons arranged at the circumference thereof, sack filling means at each station, material weighing and distributing means above the circular path of said stations, a trap-door device at each station, adapted to dump each sack after filling thereof, and discharging means for the filled sacks.

In testimony whereof I have signed my name to this specification.

FERNAND STANISLAS DERO'ME.

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