Presses – Reciprocating press construction – Box and piston type
Utility Patent
1999-04-21
2001-01-02
Vo, Peter (Department: 3721)
Presses
Reciprocating press construction
Box and piston type
C100S057000, C100S215000, C100S245000, C100S246000
Utility Patent
active
06167803
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a baler. More particularly this invention concerns a door assembly for a vertical-shaft waste-paper baling press.
BACKGROUND OF THE INVENTION
A standard waste-paper baler has a housing defining a vertically extending normally square-section shaft into which waste paper or the like to be baled is loaded and in which a piston can travel vertically from an uppermost position to a lower position pressing the mass in the shaft into a compacted ball at the base of the shaft. Normally the housing is provided with a loading door at the upper region of one of its side walls so that when the piston is in the uppermost position this door can be opened to load material to be compacted into the baler through a loading port exposed when the door is opened. Such systems are described in my U.S. Pat. Nos. 5,170,702 and 5,685,219.
In German 297 042 76 such a system is described where the loading-port door is pivoted about a horizontal axis on its upper edge so that when opened it extends upward from the baler. This has the advantage of getting the door out of the way during the loading operation, but requires that the baler be installed somewhere there is adequate room to accommodate it and its door when in the open condition, that is there must be considerable clear headroom above the baler. In addition once the door is open on such a baler the port does not present itself for easy loading through it of the normally randomly arranged material to be baled. In fact in some models the door actually makes it more difficult to approach the loading port and pass material through it.
OBJECTS OF THE INVENTION
It is therefore an object of the present invention to provide an improved baler.
Another object is the provision of such an improved baler which overcomes the above-given disadvantages, that is whose door is easy to open, takes up little space when opened, and whose port is convenient to load.
SUMMARY OF THE INVENTION
A baler has a front door assembly formed with an upper loading port and a loading door engageable in a closed position over the loading port. A plurality of guides on the assembly define respective generally vertical paths along which can travel respective elements on the door between an upper position corresponding to a closed position of the door and a lower open position with the door offset from the loading port. The door lies wholly with an outline of the door assembly in the lower open position. The guides are generally vertical and horizontally flank the door.
Thus with this system the press can be installed between and beneath other items, even recessed in a wall, and still will be fully accessible. When the door is opened it does not extend above, below, or to either side of the baler so that it offers no encumbrance to adjacent equipment. Furthermore since the door slides instead of pivoting, it can lie flush against the front of the machine when open so that it is very much out of the way.
According to the invention the port has a flat and horizontal lower edge and the door has a flat and horizontal upper edge substantially coplanar with the port edge in the open position of the door. Thus these surfaces form in effect a work table over which material being loaded into the baler can be pushed.
Each guide in accordance with the invention is formed of three pieces and forms a respective upper track and a lower track therebelow and the elements include respective upper and lower elements riding in the tracks. Each lower track is formed with a horizontally extending rest on which the respective lower element sits in the open position and with another horizontally extending rest on which the respective lower element sits in the closed position. In addition each upper track has an upper end in which the respective upper element is engaged in the closed position.
A latch is engageable between the door and the assembly for retaining the door in the closed position. This latch includes a pair of retaining pins on the assembly flanking the door and a pair of dogs each pivotal on the door between a holding position engaged over the respective retaining pin and a freeing position clear of the respective retaining pin. An actuating handle extending between the dogs connects same together for joint pivoting. An operating rod extending horizontally on the door serves as a handle for raising and lowering the door and also as a pivot for the dogs.
Biasing means connected to the door generally cancel out a weight of the door as it is moved between its positions. This means includes a counterweight, a flexible element having one end connected to the counterweight and an opposite end connected to the door, and a deflecting wheel mounted on the assembly above the port. The flexible element passes over the wheel. In addition the door includes at least one hollow and vertical frame member and the counterweight is inside the hollow frame member.
REFERENCES:
patent: 5044271 (1991-09-01), Robbins et al.
patent: 5685219 (1997-11-01), Schwelling
patent: 297 04 276 U (1997-08-01), None
Dubno Herbert
Huynh Louis K.
Vo Peter
Wilford Andrew
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