Presses – Reciprocating press construction – With material displacing means
Patent
1994-01-07
1995-02-21
Gerrity, Stephen F.
Presses
Reciprocating press construction
With material displacing means
100255, B30B 1532
Patent
active
053905938
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a waste compactor comprising a waste container which has a first opening provided for the introduction of waste, and a second opening closed by an openable door and provided for the discharge of waste; a press unit comprising a press plate insertable in the container through the first opening and adapted to compact waste in the container; and a discharging device disposed in the container and adapted to discharge compacted waste through the second opening.
A prior-art waste compactor of this type, used as a baling press for compacting paper waste, comprises two juxtaposed waste containers separated by a partition. A discharging device is provided in each container. Further, in each container, the first opening is provided in the upper wall and the second opening is provided in the front wall. The baling press comprises a hydraulic press unit which is horizontally displaceable between a first position, in which the press plate is located straight above one container, and a second position, in which the press plate is located straight above the other container. In both positions, the press plate can perform a compacting stroke, during which it is lowered into the container to compact the paper waste placed therein. The discharging device of each container is provided with tipping arms extending from the rear portion of the container barely halfway into the container along the bottom thereof. At their rear portion, the tipping arms are connected to a substantially vertical operating rod adapted to raise the rear portion of the tipping arms to tip a bale of compacted paper waste resting on the arms. The operating rod has a hook at its upper end and is pivotally arranged in a slot in the rear wall of the container. When a finished paper bale rests on the tipping arms and the press plate is in its lower end position, the operating rod is pivoted by its own weight in such a manner that its hook-equipped, upper end is introduced into the container through the slot in the rear wall. When the press plate is moved upwards from its lower end position after the door has been opened, it will engage the hook of the operating rod and entrain the operating rod upwards a certain distance, and consequently also the rear portion of the tipping arms, such that the paper bale is thus tipped through the front opening.
An inconvenience of this prior-art baling press is that the operating rod is sometimes jammed by paper waste stuck in the slot provided for the rod in the rear wall of the container. If so, the hook of the operating rod will not be introduced in the container, and the paper bale is thus not tipped when the press plate is moved upwards. Then, the stuck paper waste has to be removed, whereupon the door is closed, the press plate is made to perform another compacting stroke down to its lower end position so that the operating rod can be pivoted in order to introduce the hook in the container, the door is opened, and the press plate is again moved upwards so as to engage the hook and tip the paper bale.
In the prior-art baling press described above, use is made of electric switches which, for safety reasons, are adapted to permit the press plate to perform compacting strokes only when the door is closed. However, the operators have been found to disconnect the safety functions occasionally in order to save time, by manipulating the switches to enable the press plate to perform compacting strokes also when the door is open. In doing so, the operators put themselves in unacceptable peril.
An effort has been made to master this safety problem by providing the press unit of the baling press with a solid safety plate designed to prevent the press unit from being moved to a position in which the press plate is located straight above one of the containers, should the container door be imperfectly shut. This solution does not, however, obviate the risk of the operating rod being jammed and the ensuing delay in the tipping of the paper bale.
The object of the present invention is, therefore, to
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patent: 3659427 (1972-05-01), Harza
patent: 3851577 (1974-12-01), Newcom et al.
patent: 3916781 (1975-11-01), Cerniglia
patent: 4057009 (1977-11-01), Burford et al.
patent: 4232599 (1980-11-01), Ulrich
AB Orwak
Gerrity Stephen F.
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