Package making – Methods – Applying a partial cover
Reexamination Certificate
1998-08-03
2002-01-08
Gerrity, Stephen F. (Department: 3721)
Package making
Methods
Applying a partial cover
C053S430000, C053S438000, C053S118000, C053S587000, C100S040000, C100S087000
Reexamination Certificate
active
06336306
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a round-bale press and a method of compressing refuse into round bales.
To supply refuse to thermal processing to obtain heat or power, it is practical to compress the refuse into round bales in round-bale presses for the purpose of transporting and storing the refuse; such round bales are then kept dimensionally stable by means of an outer film which also protects them from the effects of weather.
PRIOR ART
A round-bale press for the production of refuse bales is known for example from DE 39 41 727. Refuse is introduced into a compressing chamber of a round-bale press via a feed hopper. The refuse is compacted inside this compressing chamber by means of wrapping rollers driven at the peripheral side and positioned into a predefined round-bale form. The round bale is then pre-secured by means of a net web. Part of the round-bale press's rear housing wall can be upwardly pivoted for removal of the refuse bale. The refuse bale is then transported over a roller conveyor to a wrapping table where a film is wrapped around this bale in such a way as to pack it in a dimensionally stable, weatherproof and storable manner. The plurality of driven wrapping rollers causes the energy consumption of such a round-bale press to be relatively high during compaction of the refuse bale. Upwardly pivoting part of the housing wall entails considerable construction space for the round-bale press.
A round-bale press which uses a driven link conveyor for compacting and shaping a round bale is known from WO 95/00324. The link conveyor is driven by disk-like side walls which simultaneously form the lateral limit of the compressing chamber. The refuse is pre-compacted and introduced into the compressing chamber via a second link conveyor. After the refuse has been compacted inside the compressing chamber and has been formed into a round bale, the round bale is pre-secured using a net web. To discharge the refuse bale from the compressing chamber, a plurality of endless belt segments of the link conveyor guidance are pivoted outwards. The refuse bale, which is still held between the two side walls, is then lifted, together with these side walls, out of the opened compressing chamber via lever arms. As soon as the side walls release the refuse bale, it can be conveyed to the wrapping table via an additional conveyor belt. This round-bale press version also needs considerable construction space above the compressing chamber in order to remove the refuse bale. Additional conveyance means for moving the pre-secured refuse bale from the compressing chamber to the wrapping table increase the construction costs of such a refuse packing device and consume additional energy.
DEPICTION OF THE INVENTION
A technical problem underlying the invention is to provide a round-bale press for packing refuse, the constructional outlay of which is simplified and which needs less construction space.
This technical problem is solved by a round-bale press for compressing refuse into round bales. Such a round-bale press comprises: a compressing chamber into which the refuse can be introduced, a driven endless belt that limits the compressing chamber at the peripheral side and rotates the refuse contained therein, and two side walls formed as circular disks and which limit the compressing chamber at the end face, whereby an endless belt segment of the endless belt can be pivoted by at least one drive element out of a refuse compressing position into a discharge position in which the obtained round bale can be removed on the pivoted endless belt segment.
The invention is also based upon the technical problem of providing a round-bale press that can be used to simplify removal of the pre-secured refuse bales from the compressing chamber.
This problem is solved by a round-bale press comprising: a compressing chamber into which the refuse can be introduced, a driven endless belt that limits the compressing chamber at the peripheral side and rotates the refuse contained therein, and two side walls which limit the compressing chamber at the end face, whereby an endless belt segment of the endless belt can be pivoted out of a refuse compressing position into a discharge position in which the obtained round bale can be removed on the pivoted endless belt segment.
The invention is also based upon the technical problem of designing a round-bale press for compressing refuse into round bales that ensures long-lasting and reliable operation.
This technical problem is solved by a round-bale press for compressing refuse into round bales comprising: a compressing chamber into which the refuse can be introduced, a driven endless belt which limits the compressing chamber at the peripheral side and rotates the refuse contained therein, and two side walls which limit the compressing chamber at the end face, whereby an endless belt segment of the endless belt can be pivoted out of a refuse compressing position into a discharge position in which the obtained round bale can be removed on the pivoted endless belt segment, with the endless belt being a link conveyor whose links are made of aluminum or an aluminum alloy.
Finally, the invention is based on the problem of providing a simple and inexpensive method of compressing and discharging round bales of refuse. This problem is solved by a method of compressing and discharging refuse in round bales; in this method refuse is introduced through a feed aperture into a compressing chamber defined by an endless belt—guided by one of a plurality of deflection rollers—and two side walls, the refuse is rotated inside the compressing chamber and refuse continues to be introduced until a refuse bale of a predetermined size is produced, a securing means, such as a net web, is then wrapped, at the peripheral side, around this refuse bale produced in the above manner, a pivotably supported endless belt segment of the endless belt is pivoted out of the refuse compressing position into a position for discharging the round bale, thus creating a transport path for the compressed round bale to a wrapping table downstream of the compressing chamber, and the refuse bale that is secured at the peripheral side is removed from the compressing chamber by the endless belt via the pivoted endless belt segment as a result of letting the endless belt run.
The invention is based upon the idea that the endless belt, which together with two end-face side walls defines the compressing chamber for the purpose of receiving the refuse and compressing it into round bales, is also used for the first time as a discharge means. A compressed round bale can be discharged without additional constructional outlay as a result of an endless belt segment which is pivoted out of a refuse compressing position into a discharge position. Until now, separate devices had been necessary for this purpose. A conveyor means for transporting the pre-secured refuse bales to the wrapping table can be replaced by the pivotably supported endless belt segment of the compressing chamber, with the endless belt assuming the function of a conveyor belt. The pivoted endless belt segment preferably bridges over the space necessary for the wrapping device between the round-bale press and the wrapping table on which a film web is then completely wrapped around the pre-secured refuse bale in order to protect it from the effects of weather and to keep it dimensionally rigid. In this way, the space required by the round-bale press above the compressing chamber is not only reduced, but the space needed between the compressing chamber and the wrapping table is also decreased.
Further preferred embodiments are characterized by the dependent claims.
The endless belt is preferably guided via at least four deflection rollers, whereby in order to discharge the round bale from the compressing chamber, an endless belt segment to which at least one of these deflection rollers is attached can be pivoted such that the endless belt segment preferably pivots away around the axis of one of the deflection rollers. The use of fewer defle
Schuster Thomas
Sieger Erich
Dorsey & Whitney LLP
Gerrity Stephen F.
Petersen, Inc.
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