Presses – With drain means for expressed liquid – Drain tube inbedded in material
Patent
1993-05-28
1994-11-08
Gerrity, Stephen F.
Presses
With drain means for expressed liquid
Drain tube inbedded in material
100125, B30B 902
Patent
active
053616910
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a draining element for presses for extracting liquids from solid substances, especially for fruit presses, more particularly, to a rod-shaped, flexible core with flow channels to discharge the extracted liquid from the pressing space and a liquid-permeable filter cover enclosing the core, and at least one end of the drainage element being fastened by a drainage lock to a juice collecting plate or to the pressing sheath.
DESCRIPTION OF THE PRIOR ART
A substantial number of such draining elements is placed, for example, in the pressing space of a fruit press between the movable and the stationary pressure plates. During the pressing process or during the closing of the movable pressure plate, the flexible draining elements are deformed. In this case, the extracted juice penetrates the filter cover of the draining element and is brought out along the flow channels of the rod-shaped core from the pressing space and conveyed to a juice collecting space. For this purpose, both ends or, in the case of one-sided fastening, only one end of the draining element is detachably fastened to the pressure or juice collecting plates, which, on the one hand, border the pressing space and, on the other hand, the juice collecting space. The flow channels for the juice are formed by longitudinal grooves on the outside periphery of the core and terminate in the juice collecting space just before the drainage lock.
Depending on the particular materials being pressed, a large quantity of fine solid and sediment parts are entrained in the extracted juices. During the flow of the extracted juices, small lumps of sediment and solids may be formed in the longitudinal grooves of the drainage element. These lumps are urged in their flow through the grooves by the bending movements of the flexible drainage cores. But along the length of the rigid drainage locks, this flexing movement is lacking, and partially solid sediment plugs which have been formed tend to clog the longitudinal grooves of the drainage core. The juice discharge is then greatly obstructed which results in increased losses of yield and output. The removal of the clogging lumps is often very difficult and time-consuming, since the drainage elements must be removed and the operating sequence of the press is interrupted. Moreover, a chemical cleaning is generally necessary.
SUMMARY OF THE INVENTION
The object of the invention is to avoid said drawbacks and to prevent clogging of the grooves in the area of the drainage locks so as to improve the function and the output of the press.
This object is achieved according to the invention by enlarging the flow channels of the drainage element in the area of the drainage lock.
Advantageously, the flow channels of the drainage element are formed by longitudinal grooves, located on the outside periphery of the core, and the grooves are enlarged in the area of the drainage lock.
An especially simple embodiment which is also usable in existing juice presses, for enlarging the longitudinal grooves is achieved by removing every second ridge of the drainage core formed between the longitudinal grooves in the area of the drainage lock.
In another modification of the invention, the longitudinal grooves are conically widened in the area of the drainage lock.
Another modification to enlarge the flow channels consists of increasing the depth of the longitudinal grooves in the area of the drainage lock along the length of the drainage lock.
A particular advantage of the present invention is that because of the widening of the flow channels in the area of the rigid drainage lock, the sediment parts are no longer inhibited in their flowing movement and are immediately flushed outward into the juice collecting space. The retention time of the extracted juices in the widened flow channels is too short for a quick accumulation of the sediment particles. Any clogging of the flow channels is thus successfully prevented and the output of the press is increased. The interval between the pe
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patent: 3207064 (1965-09-01), Hauser-Bucher
patent: 3951058 (1976-04-01), Hauser
patent: 4475451 (1984-10-01), Hartmann
patent: 5130022 (1992-07-01), Chara
Bucher-Guyer AG Maschinenfabrik
Gerrity Stephen F.
Jaskiewicz Edmund M.
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