Foods and beverages: apparatus – Means to treat food – By isolating a fluid constituent
Patent
1989-04-14
1992-02-25
Simone, Timothy F.
Foods and beverages: apparatus
Means to treat food
By isolating a fluid constituent
99484, 99495, 99513, 100 94, 100102, 100118, A23L 102
Patent
active
050903063
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a process for the preparation of fruits, berries and/or vegetables for the extraction of liquid raw products by comminuting the raw material and separating the juice pulp.
2. Description of the Related Art
For the production of juice pulp (pulpy juice) as a preliminary step for further refining measures it is known to use so-called pulping machines. The raw material to be processed which can consist of whole fruits is first crushed and then the juice is extracted in the pulping machine. In the course of this the juice pulp consisting of juice and cell material is separated from the seeds, stems, skins and cores by mechanical means.
This known process has the disadvantage that because of the intensive mechanical handling of the raw material in the pulping machine, especially in malaceous fruit. the stems, seeds and skin fragments are damaged, thereby causing a negative impact on the taste and aroma of the juice. Furthermore the residue consisting of stems, seeds, skins and cores which have been largely crushed by the pulping machine causes considerable difficulties in further extraction of juice by pressing. The overall yield is therefore smaller and the production of pulpy juices is uneconomical.
Generally known are also the conventional processes for extracting fruit juice by pressing. The object of these known methods is to achieve the highest possible yield with the lowest possible dregs content. Because of the dregs content work is done with a small mesh size, which, for example, in belt presses is about 0.5 mm. In this instance the fine dregs and valuable cell material remain in the residue of the press and are lost. Moreover the layer thickness of the pressed raw material with conventional belt presses is relatively great (approximately 30 to 50 mm). Because of this long juice paths are caused which do not let viscous cell material pass through which is needed for the extraction of juice pulp. The same is true for the passage openings in the separation wall between the juice which has flowed off and the residue, which are too small to let juice pulp through and would become clogged. The conventional pressing processes are therefore not suitable for the extraction of juice pulp, which along with the juice that has been squeezed out also still contains a large portion of cell material. The raw juice extracted from conventional presses is further processed without any other liquefaction technology into clear or opaque juices, but not pulpy juices.
SUMMARY OF THE INVENTION
The object of this invention is to provide a process with appropriate equipment for extracting juice pulp, which along with a high degree of economy and reduced investment costs, guarantees improved quality of the juice pulp.
According to the invention this object is achieved in that juice pulp consisting of juice and cell material is extracted by means of pressing the comminuted raw material.
The advantages obtained with the invention consist particularly in the fact that by the gentle handling of the raw material during the pressing, stems, seeds and skin fragments of the fruit are not crushed and damaged. As a consequence an improvement in the quality of the juice pulp results. As a result of the large mesh size of the press according to the invention and the special design of the separation and sieve surfaces, fine dregs and cell material are carried off with the juice pulp. Therefore in the residue there remains less fine dregs and cell material which favors the economical use of a recycling press for increasing the yield. The strain on the conventional press functioning preferably as a recycling press is thus greatly relieved by the press according to the invention. As a result, the demands on the recycling press are not so high, so that it can be built more cheaply and the investment costs are reduced. Particularly well suited as recycling press are presses of the horizontal basket press type because of the long flow paths which are necessary for
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Bucher - Guyer AG Maschinenfabrik
Jaskiewicz Edmund M.
Simone Timothy F.
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