DE3327071A1 - Process for extracting liquids from foodstuffs such as fruits and vegetables - Google Patents

Abstract

A process for extracting juice from edible solids and semi-solids, for example fruits or vegetables, is proposed, in which the starting materials are first sliced into small strips and are then pressed. As a result of the slicing, numerous channels for draining the juice are created in the pulp (in the presscake). The juice yield is considerably increased as a result. It is further proposed to warm the slices to about 29 DEG C prior to pressing. A further increase in the juice yield occurs as a result. Using the process, material can be first sliced and pressed, then the presscake can be mechanically loosened again and pressed again. The process can be repeated several times.

Description

2/13 (83400) -3-

TERGAU & POHL

PATENT LAWYERS

HEFNEBSPL. 3 POSTF. 119347
85OO NUREMBERG 11

ATLAS PACIFIC ENGINEERING COMPANY, a corporation
organized and existing under the laws of the State of
Delaware, (USA) 67th and Hollis Streets,
Emeryville, California 94608, United States of America.

Ahren Ver f to r Gewinnun g üss CANDIES of Fl

a us food as beispielswe i se Previou ch th

and vegetables

The present invention relates to a method for Obtaining liquids from solid or semi-solid Foods such as fruits and vegetables .

So far, fruits, vegetables or a pulp made from them have been physically sandwiched between solid plates or a solid one Plate and a stretchable membrane pressed to squeeze the juice out of the fruit, vegetable or pulp. When pulping pulps, it is common practice to add various pressing aids, such as For example rice husks, in order to create channels through which the juice is pressed during pressing can flow out of the pulp.

In accordance with the present invention, there is provided a method for obtaining juice from edible solids and semi-solids such as fruits and Vegetables suggested showing the steps of carving the food contains, so as to pulp from individual elongated strips

produce; then pressing the shredded pulp in a press zone to extract the juice.

The method according to the present invention thus includes a shredding step prior to pressing which the fruits or vegetables are shredded into a pulp containing elongated strips, preferably with a thickness of the order of 1.5 to 3 mm. The streaky texture of the pulp -, Q brings with it channels through which the juice of the Pulp can flow during pressing, so that pressing aids to obtain the earlier juice yields, are not required.

The yield can advantageously be further improved by both the food and the shredded pulp by adjusting the temperature to an optimal value before shredding and Presses are tempered.

In order to fully illustrate the invention, the following description is based on an exemplary embodiment given, referring to the drawing. They represent:

1 shows a flow diagram of a device for carrying out the method according to the invention;

2 shows a cross section through a grating device for chopping the fruit into oblong ones Stripes.

The process is through a pre-treatment of the fruit or the vegetables from which the juice is to be obtained, in which this e.g. by a Ent.steiner 1, which removes unwanted particles such as stones, metal parts, etc. in order to

-δ- to protect the downstream processing equipment. Stone removal can be carried out in different ways, for example by means of a fluidized bed, as described in U.S. Patent 3,704,041.

The fruit or vegetable is then placed in a grater shredded and turned into pulp, which consist of elongated strips with a preferred thickness range of 1.5 to 3 mm. This can be done in

IQ of a friction device as shown in FIG is to be carried out. It was found that the chopping into elongated strips reduced the juice yield increased without the need during subsequent Pressing steps Pressing aids such as rice husks

2g or the like. to add. When pressing apples, for example, the juice yield can be increased by at least 20 % without pressing aids. It has also been found that chopped apples that have just been frozen give more uniform strips compared to chopped apples at room temperature and also lead to increased juice yield.

The shredded pulp is then pre-juiced as is shown at 3 and the draining juice flows through the line 4 to a juice collecting container 5. Vibratory or centrifugal juicers can be used for this process step can be used. Collecting the juice so freely draining does the following Juice extraction step by pressing more effective.

The pre-juiced shredded pulp is then at 6 tempered in a stirred pulp kettle 1, the temperature is set to about 29 C or 30 ° C, which turns out to be the optimum temperature for improved Has proven press efficiency. Pulp can do the same enzymes are added in this process step

the. The pulp storage container can be a jacketed Be tank, i what hot water circulates through cen coat. Or the tank can be equipped with heating fields be. Much higher juice yields can be achieved can be achieved with apples, for example, if the temperature is set to about 29 C. At this temperature is the yield with tempered apple pulp compared to apple pulp with a temperature of 10 ° C approx. 623 liters per ton compared to 584 liters per ton.

The tempered pulp is then subjected to a first pressing step 8a with a measured volume. One suitable press is an intermittently moving carrier belt, which carries a certain thickness of pulp, which you from a volumetric storage container 7a was fed. A suitable cake thickness for apples is in the range of 2b to 76 mm. The carrier tape feeds a pulp cake into the press zone between, for example, a pair of press plates. It can do this hydraulically be moving solid plates or one can also be an expandable membrane, as in the Article "Automatic Pneumatic Press" that appeared in "Vines and Wines", December 1960 is. In this first pressing step, the plates move towards one another and press the pulp cake for about 1 mirute under a pressure of 14062 bis

28124 kg / m. The squeezed juice flows through line 9a / around collecting container 5. The elongated pulp strips create routes that lead the juice out of the cake.

When the pressure is released, the carrier tape moves the pressed cake from the pressing station and feeds it to a processing step 10a. The carrier tape

leaves the pressed cake in a first mixer-agitator fall, which the pressed cake between rotating Paddling out of thorn and the elongated ones Pulp strips flake L. This processing opens new strip channels for drying and sets new ones Apply the pressing pressures used in the next step.

The mixed and processed cake through IQ now a second vibratory feeder 7b which a predetermined volume of the pulp feeding an intermittently moving carrier belt to a second press station 8b to form an additional 25 to 76 mm thick cake there. There the cake is bis at 35155

^ g 49217 kg / m pressed in a press zone. The won Juice runs through a line 9b / around collecting container 5.

Following the second pressing step, the carrier belt throws the pressed cake into a second one Mixer-agitator 10b, where the cake is broken up again and the pulp strips are flaked. The second Mixer-agitator 10b fills a third vibratory knife 7c which has a predetermined pulp volume Provides carrier tape of a third press station 8c in thicknesses of 25 to 76 mm. The pulp cake in the third

Press station is pressed at 49217 kg / m or higher in a press zone, with the juice obtained through a Line 9c to the collecting container 5 flows. The carrier tape of the third press station finally unloads the pressed one Pomace on a pomace belt for disposal.

One form of chopping device useful here is shown in FIG. It comprises a housing 15 in which a cutting disk 16 around a bearing pin 17 rotates. Fruits, e.g. apples 18, ruthless

-8th-

already in the feed hopper 19 to the cutting disk 16 and are in long strips 20 of about that described Cut up size.

As an alternative, the cutting disk 16 can be stationary with the feed hopper 19 and have suitable walls or The leaves rotate in order to guide the fruits contained in the device against the cutting disc 1.

Claims (5)

2/13 (83400) -ρί. TERGAU & POHL PATENT LAWYERS HEFNERSPL '4 POSrF. 119347 85OO NUREMBERG 11 ATLAS PACIFIC ENGINEERING COMPANY, a corporation
organized and existing under the laws of the State
of Delaware, (USA) 67th and HoIl is Streets,
Emeryville, California 94608, United States of America. Claims "I. Process for Obtaining Juice from Edible Solids and semi-solids, such as fruits or vegetables, in which the fruit is pressed to obtain juice characterized, that the food is produced prior to pressing a pulp consisting of individual strips is shredded. 2. The method according to claim 1, characterized, that the temperature of the chipped pulp after chipping ui
is set. before chopping and before pressing to about 29 ° C 3. The method according to claim 1 or 2, characterized, that the pressed pulp is continuously removed from the press zone; that it is processed after the first pressing to flake the elongated strips and
that the pulp is then pressed again. p 1 4. The method according to claim 1, 2 or 3, characterized, that the food in elongated strips with is shredded to a thickness of 1.5 to 3 mm. 5. The method according to any one of the preceding claims, characterized, that the food at least during the carving Has room temperature.