EP0156718A1 - Verfahren und Maschine zum Beschichten von Obst und Gemüse in einer Plastikfolie - Google Patents

Verfahren und Maschine zum Beschichten von Obst und Gemüse in einer Plastikfolie Download PDF

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Publication number
EP0156718A1
EP0156718A1 EP85400458A EP85400458A EP0156718A1 EP 0156718 A1 EP0156718 A1 EP 0156718A1 EP 85400458 A EP85400458 A EP 85400458A EP 85400458 A EP85400458 A EP 85400458A EP 0156718 A1 EP0156718 A1 EP 0156718A1
Authority
EP
European Patent Office
Prior art keywords
film
product
coating
support
plastic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85400458A
Other languages
English (en)
French (fr)
Other versions
EP0156718B1 (de
Inventor
Carmelo D'urso
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xeda International SA
Original Assignee
Xeda International SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xeda International SA filed Critical Xeda International SA
Publication of EP0156718A1 publication Critical patent/EP0156718A1/de
Application granted granted Critical
Publication of EP0156718B1 publication Critical patent/EP0156718B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B33/00—Packaging articles by applying removable, e.g. strippable, coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B25/00—Packaging other articles presenting special problems
    • B65B25/02—Packaging agricultural or horticultural products
    • B65B25/04—Packaging fruit or vegetables

Definitions

  • the present invention relates to a process for coating products, in particular fruit and vegetables using a plastic film, and a machine for carrying it out.
  • the invention aims to simplify the packaging of products, in particular fruit and vegetables, by coating them in a single operation.
  • the subject of the invention is therefore a process for coating products, in particular fruit and vegetables, using a plastic film, characterized in that a surface film is formed by surface tension on support means.
  • liquid plastic material a product to be coated is brought into contact with the film by relative displacement of the pro duit and the film, the film is still deformed still in the liquid state under the action of the product and its progressive application to the product, the film closing on the product after it has passed through said support means in perfectly matching its shape, so as to completely coat it.
  • the film of liquid plastic is formed by immersing the support means in a bath of liquefied plastic material and then removing said means from the bath.
  • the invention also relates to a machine for implementing the method defined above, characterized in that it comprises means for conveying the products to be coated, means for forming a plastic film coating on at least one support, means for bringing the products into contact with the plastic film and means for causing relative displacement of the product and the film support to ensure the application of the film on said product .
  • a fruit 1 to be coated rolls on an inclined plane 2 towards a film 3 of liquid plastic material formed by surface tension on a support 4 in the form of a ring.
  • the shutter 6 is advantageously covered with a non-stick material such as Teflon, so that the plastic film 3 does not stick to the shutter 6.
  • the latter is actuated in rotation in the direction of the arrow F (FIG. .4) so that the fruit deforms the film 3 even more.
  • the oscillating flap 6 ends up completely disappearing in front of the fruit 1 which can thus continue its course, while the plastic film 3 closes thereon by surface tension and conforms perfectly to its shape.
  • the fruit 1 is then completely coated with the film 3 (Fig. 5).
  • FIG. 6 and 7 A machine intended to implement the process described above is shown in Fig. 6 and 7. It includes a ribbon conveyor, not shown, which sends the fruit and vegetables on an inclined surface divided into three channels 8 having a cross section the shape of a V.
  • the tank is provided with an electromagnetic level detector 12 which controls a filling system to keep the liquid level 11 in the tank 9 constant. It also has an electrical resistance 13 at its bottom for heating the bath 11.
  • a thermostat (not shown) acts on the electric current to keep the temperature of the bath constant 11.
  • a movable frame 14 mounted oscillating around a fixed axis 15 comprises two lateral arms 14a, 14b whose ends opposite the axis 16 are joined by a crosspiece 14c.
  • the cross-member 14c carries a series of rings 4 intended to be immersed in the tank 9.
  • the frame T4 comprises an actuating arm 14d secured to its end mounted on the oscillation axis 16.
  • Said arm 14d is biased by a return spring 17 fixed to a support 18 which is itself fixed to the chassis of the machine.
  • the lateral arm 14a carries, near the cross-member 14c of the frame, a toothed sector 19 fixed to said arm 14a.
  • This toothed sector 19 is engaged with a free wheel 21 carried by a shaft 22 on which are fixed as many plates or stop surfaces 23 as there are channels 8. These stop surfaces 23 are each biased by a return spring 24 to a position approximately perpendicular to the movable frame 14.
  • the shaft 22 is supported by bearings 26 fixed to a frame (not shown).
  • a flap 6 covered with Teflon is mounted oscillating around a fixed axis 7. It is connected to a connecting rod 27 via a crank 28.
  • the connecting rod 27 is connected to a second crank 29 integral in rotation with a cam 31 rotating about an axis stationary 32 driven for example by an electric motor (not shown).
  • the cam 31 is in contact with the arm 14d biased by the return spring 18.
  • the coating machine which has just been described, can be associated downstream a machine intended to deposit on the coated products, a layer of waxy emulsion forming a film having a lower gas permeability than that of the plastic used to form the coating film.
  • the movable frame 14 being initially in the high position, fruits 1 are conveyed in the various channels 8 of the inclined plane 2.
  • the first channel 8 for example, the first fruit 1 is stopped by the stop surface 23.
  • the cam 31 -then pushes on the arm 14Q against the return spring 17 forcing the movable frame 14 to rotate clockwise around the axis 16, so that the rings 4 are caused to plunge into the bath 11 containing the molten plastic.
  • the cam 31 continues to run and the lateral arm 14d under the action of the spring 17 causes the rings 4 to go back up to the almost vertical position.
  • a film of liquid plastic material is formed by surface tension inside each ring 4.
  • the toothed sector 19 meshes with the free wheel 21 which then turns counterclockwise of a watch driving with it against the spring 24, the stop surface 23 towards a roughly horizontal position.
  • the stop surface 23 allows the first fruit to pass.
  • the spring 24 urges the stop surface 23 towards its substantially vertical rest position thanks to the free wheel 21, thus blocking the second fruit.
  • the first fruit then continues its course on the inclined plane 2, comes into contact with the film 3, is enveloped by the latter, then comes into abutment against the oscillating flap 6 which is then parallel to the ring.
  • the cam 31 continuing its course then actuates the flap 6 via the linkage 29, 27, 28.
  • the flap 6 then switches to allow the first fruit coated with the film to pass through.
  • a film with a thickness of the order of 5 ⁇ 10 to 2 ⁇ 10 2 mm is obtained.
  • the cam 31 acts again on the arm 14d de- so that the rings 4 relapse into the room 1 1, while the linkage 29,27,28 traces the vibrating flap 6 in its vertical position. The cycle then repeats for all channels.
  • the products receive as a second protective skin which can be removed before consumption.
  • the water loss is greatly reduced and the freshness of the products is kept almost intact, which makes it possible to preserve the fruits before consumption for much longer without preventing the respiration of the product.
  • the film deposited by the process according to the invention can be removed completely by "peeling".
  • the polyethylene used is very permeable to gas and not very impermeable to water, and if the plastic film is coated with a layer of wax impermeable to gas by a conventional process, a double seal is obtained. In the case of fruit, where a delay in ripening is requested, this association is very interesting.
  • Both layers can be removed at the same time.
  • the means for stopping the products can be controlled by a photoelectric cell.
  • the movable frame 14 can be eliminated and replaced by an automatic device for plunging the rings 4 into the bath 11.
  • the rings 4 can moreover be replaced by U-shaped mounts.
  • Another advantage of the process according to the invention lies in the fact that a fungicidal and / or antioxidant preservative can be mixed with the plastic by addition to the bath, this product also being able to be removed in its entirety during removal of the coating film except for traces which have migrated onto the skin of the product.
  • the plastic material of the bath is a polyethylene polyethylene.
  • thiabendazole as a fungicide and ethoxyquin as an antioxidant.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Storage Of Fruits Or Vegetables (AREA)
  • Packaging Of Special Articles (AREA)
  • Packages (AREA)
  • Basic Packing Technique (AREA)
  • Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
EP85400458A 1984-03-12 1985-03-08 Verfahren und Maschine zum Beschichten von Obst und Gemüse in einer Plastikfolie Expired EP0156718B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8403765 1984-03-12
FR8403765A FR2560856B1 (fr) 1984-03-12 1984-03-12 Procede et machine d'enrobage notamment de fruits et legumes dans une pellicule de matiere plastique

Publications (2)

Publication Number Publication Date
EP0156718A1 true EP0156718A1 (de) 1985-10-02
EP0156718B1 EP0156718B1 (de) 1987-09-09

Family

ID=9301925

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85400458A Expired EP0156718B1 (de) 1984-03-12 1985-03-08 Verfahren und Maschine zum Beschichten von Obst und Gemüse in einer Plastikfolie

Country Status (8)

Country Link
US (1) US4631902A (de)
EP (1) EP0156718B1 (de)
DE (1) DE3560565D1 (de)
ES (1) ES8701652A1 (de)
FR (1) FR2560856B1 (de)
GR (1) GR850594B (de)
MA (1) MA20375A1 (de)
ZA (1) ZA851795B (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB930482A (en) * 1960-04-05 1963-07-03 British Visqueen Ltd Packaging process
DE1921352A1 (de) * 1969-04-26 1970-11-05 Vogt Clarence W Beschichtungs- bzw. Versiegelungsvorrichtung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2333887A (en) * 1941-07-26 1943-11-09 Lorenz M Redlinger Protective coating and process of manufacture therefor
US2560487A (en) * 1947-06-17 1951-07-10 Robert B Shugart Fruit coating apparatus
US2622380A (en) * 1949-09-19 1952-12-23 Wingfoot Corp Method of wrapping articles
US2703760A (en) * 1952-01-25 1955-03-08 Johnson & Son Inc S C Method of coating fruits and vegetables
US3299195A (en) * 1963-02-19 1967-01-17 Eastman Kodak Co Method of encapsulating an article in a seamless unbroken clear film
US3404025A (en) * 1964-07-13 1968-10-01 Western Gear Corp Method and apparatus for coating a sheet or web
US3465495A (en) * 1965-08-16 1969-09-09 Sunkist Growers Inc Apparatus for boxing layers of articles such as fruit and the like
US3468099A (en) * 1966-01-25 1969-09-23 Clarence W Vogt Curtain depositing apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB930482A (en) * 1960-04-05 1963-07-03 British Visqueen Ltd Packaging process
DE1921352A1 (de) * 1969-04-26 1970-11-05 Vogt Clarence W Beschichtungs- bzw. Versiegelungsvorrichtung

Also Published As

Publication number Publication date
FR2560856B1 (fr) 1987-01-09
ES541651A0 (es) 1986-12-16
ES8701652A1 (es) 1986-12-16
US4631902A (en) 1986-12-30
FR2560856A1 (fr) 1985-09-13
ZA851795B (en) 1985-11-27
GR850594B (de) 1985-07-08
EP0156718B1 (de) 1987-09-09
MA20375A1 (fr) 1985-10-01
DE3560565D1 (en) 1987-10-15

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