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Title:
PROCESSING METHOD AND INSTALLATION FOR FLATFISH PROCESSING
Document Type and Number:
WIPO Patent Application WO/2019/120410
Kind Code:
A1
Abstract:
The invention relates to a method and an installation for flat fish processing. The installation (1) is for use in a processing method which pulls the side fin and the small bones together with the fat parts on the small bones out of a flat fish (11) that has been freed for head and possible skin. The installation (1) comprises a driving belt (3) (for example round or v-formed) mounted around and between two wheel-discs (2 and 5), a left and a right, which have been placed horizontally a distance from each other and adapted to hold the driving belt (3) firm and be driven round (for example by an electric unit), and a table for processing (9) placed such that the driving belt (3) during operation runs along the side of the surface of the table for fish processing (9) in a horizontal distance of about 3 to 7 mm from the surface of the table for fish processing (9) and in a vertical distance of about 3 to 7 mm over the upper edge of the surface of the table for fish processing (9), and that the fish processing table in the longitudinal direction extends so long past the first point of contact between the belt (3) and the felloe of the left wheel-disc (2), that a flat fish (11), which is placed, such that the side fin gets in between the belt (3) of the wheel-disc (2) felloe, is forced to keep the horizontal position, while the flat fish is pushed in the moving direction of the upper part of the belt (3) gradually as new side fin runs in between the driving belt (3) and felloe during the processing method, whereby side fin and the small bones together with most fat parts are pulled out all the way into the spine bone itself by or just after the flat fish (11) first point of contact between the driving belt (3) and the felloe of the wheel-disc (2). The installation may use larger pulling forces than installations according to prior art, whereby also lager flat fish can be processed.

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Inventors:
EMIL SONNE BECH, Jørgin (Skálavegur 191, 480 Skála, 480, FO)
Application Number:
DK2018/050349
Publication Date:
June 27, 2019
Filing Date:
December 12, 2018
Export Citation:
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Assignee:
SP/F LUNDIN (Skálavegur 191, 480 Skála, 480, FO)
International Classes:
A22C25/16; A22C25/06
Foreign References:
DK66395A1996-12-13
US5492502A1996-02-20
US5591076A1997-01-07
EP0459558A11991-12-04
DE2227830A11973-12-20
Attorney, Agent or Firm:
MM PATENTS (Parkvej 5, 2830 Virum, 2830, DK)
Download PDF:
Claims:
C L A I M S

1. An installation (1 ) which is arranged for a processing method which pulls the side fin out and the small bones together with the fat parts on the small bones out of a flat fish (11 ), followingly that this has been freed for head and possible skin, comprising a driving belt (3) for example round or v-formed, which has been mounted around and between two wheel-discs (2 and 5), a left and a right, which have been placed horizontally a distance from each other and adapted to hold the driving belt (3) firm and possibly stretched out and for at the same time to be driven round as for example by an electric driving unit (2) characterized by that the installation (1 ) in addition comprises a table for processing (9) placed such that the driving belt (3) during operation runs along the side of the surface of the table for fish processing (9) in a horizontal distance of about 3 to 7 mm from the surface of the table for fish processing (9) and in a vertical distance of about 3 to 7 mm over the upper edge of the surface of the table for fish processing (9), and that the fish processing table in the longitudinal direction extends so long past the first point of contact between the belt (3) and the felloe of the left driving disc (2), that a flat fish, which is placed, such that the side fin gets in between the belt (3) of the wheel-disc's felloe (2), is forced to keep the horizontal position, while the flat fish is pushed in the moving direction of the upper part of the belt (3) gradually as new side fin runs in between the driving belt (3) and felloe during a processing method, whereby side fin and the small bones together with most fat parts are pulled out all the way into the spine bone itself by or just after the flat fish's (11 ) first point of contact between the driving belt (3) and the felloe of the wheel-disc (2).

2. An installation (1 ) according to claim 1 , wherein the driving belt is a chain, and the wheel-discs have teeth.

3. An installation (1 ) according to claim 1 , wherein the driving belt is a standard non-elastic driving belt (3), and the wheel-discs (2 and 5) has a felloe with a recess (12).

4. An installation (1 ) according to any of the claims 1 to 3 where the installation in addition comprises a scraper (4) mounted with an arm mounted on a mounting plate (6) such that the scraper (4) is lowest by the downside of the driving belt’s (3) circumference in the middle between the wheel-discs (2 and 5), and such that the downside of the driving-disc (3) in its whole width glides below the downside of the scraper’s (4) arm (10) so adapted that it can remove side fin and small bones which during operation have been transported forward to the scraper (4) on the inner side of the driving belt (3).

5. An installation (1 ) according to any of the claims 1 to 4, wherein there in front, defined by the moving direction of the belt, said first contact point between the driving belt (3) and left wheel-disc’s (3) felloe is placed a knife to cut a possible skin through.

6. An installation (1 ) according to any of the claims 1 to 5, wherein said horizontal distance of is 5 mm and said vertical distance is 5 m m . 7. An installation (1 ) according to any of the claims 1 to 6, wherein said installation (1 ), provided if the driving belt (3) is a chain (13), inclusive the chain, and, optionally, in addition, the table for processing (9) is made from stainless steel.

8. An installation (1 ) according to any of the claims 3 to 7, wherein said installation (1 ), in addition, is arranged such that the left driving-disc (2) is mounted to the mounting plate (6) by means of a fork mounted to the mounting plate (6), and where the right wheel- disc (5) is mounted to the mounting plate (6) by means of an electric driving unit (8) which is firmly fixed to the mounting plate with a distance between the two wheel-discs (2 and 5), which hold the driving belt (3) firmly stretched around and firm down in a recess in the felloe (12) on the two wheel-discs (2 and 5), and where the electric driving unit (8), which has been connected to the right axis on the right wheel-drive is adapted to lead the driving belt (3) round, such that the driving belt (3) can run forward to the left along the side of the surface of the table for fish processing in a horizontal distance of a 3 to 7 mm preferably 5 mm, from the surface of the fish processing table (9) and in a vertical distance of 3 to 7 mm, preferably 5mm, over the upper edge of the surface of the table for fish processing (9).

9. A processing method for removing side fin and small bones all the way into the spine of a flat fish after that said has been freed from the head and skin characterized by, that the side fin of the flat fish is lead out over the edge of a processing table (9) in order to be seized

between a running driving belt (3) and a felloe (12) on a vertical rotating wheel-disc (2), that creates a such strong pull that the side fin with the horizontal edge as counter holder by or after contact between the flat fish and driving belt is pulled down such that the side fin and small bones are pulled out of the fish all the way into the spine.

10. A process according to claim 9, wherein the withdrawn side fin and withdrawn small bones continue on the inner side of the driving belt to a scraper (4) mounted downstream after the wheel-disc (2), which pushes side fin and the small bones off the inner side of the driving belt (3).

Description:
Processing method and installation for flatfish processing

The present invention relates to a processing method capable of extracting and removing both fins and smaller bones located between the flatfish's spine and the flatfish's outermost and most fat parts closest to the side fins such that only the spine remains. In addition, the invention relates to an installation for carrying out this processing method.

By the oldest known processing methods, the fines are cut off, but such that the small bones are left at the collarbone and along the sides of the fish, which renders the flatfish a less sought-after product, which it does not pay to process and sell in larger quantities.

This problem is not the case by the use of the installation, which is described in DK0663/95. This installation tiers off the fins and removes also the small bones and most fat parts at the fins.

The installation described in DK0663/95 has a round or v-formed belt, which is mounted around and between two wheel-discs, a left and a right, which holds the belt firm and stretched and at the same time rotates the belt by means of an electric unit at variable speed. The installation consists also of a scraper formed with an arm that slides over the belt when the driving belt rotates.

The round or v-formed belt rests horizontally over and around the felloe of the two wheel-discs, such that the belt forms a circumference, which is hold in place by means of the distance between the wheel-discs, which also rotates the belt by means of an electric unit, that is connected to the right wheel-disc ' s axis. Lowest by the inner side of the circumference of the belt the scraper is mounted. It removes the fish waste in the form of fins and bones from the belt.

By arranging and keeping a flatfish firm, such that one side fin is pressed in between the belt and the turning disc, and by moving the flatfish in the rotation direction tangentially with the fixing point of the flat fish at the belt, the fin and attached bones are teared off, whereas the most fat parts of the flat fish remain. This installation is, however, only suited for small flat fish, where it is not required to use large forces to tear off a side fin.

An installation and processing method for processing larger flat fish, where most fat parts are kept, is therefore desired.

The solution to the above problem is an installation of the stated type of the known part of claim 1 , which is characterized by that the installation in addition comprises a table for processing placed such that the driving belt during operation runs along the side of the surface of the table for fish processing in a horizontal distance of about 3 to 7 mm from the surface and in a vertical distance of about 3 to 7 mm over the upper edge of the surface of the table for fish processing, and in the longitudinal direction past the left driving disc, whereby a flat fish, which is placed, such that the side fin during operation is brought in between the driving belt of the pulling installation and the felloe of the wheel disc, is forced to keep the same horizontal level, whereby the side fins and the small bones together with the fat parts are pulled out of and removed from the flat fish at the first point of contact on the wheel disc between the flat fish, the driving belt, and the felloe of the wheel-disc.

The small bones are pulled out all the way to the spine itself.

If the installation is adapted with a stronger squeeze pull, one can exert a such high tear force, that side fin and small bones may be withdrawn even on larger flat fish

The flat fish is processed along both side fins. One side at a time.

Other suitable embodiments of the installation are as stated in claim 2, where a cogwheel is applied as wheel-disc and a chain as driving belt. Other embodiments are claimed in claim 3 to 8.

A method for removing side fin and small bones all the way to the spine on a flat fish is claimed in claim 9 or 10.

In order that the invention may be more easily understood some non- limiting examples on embodiments will now be described in detail with reference to the figures in which:

Fig. 1 shows the principle by processing a flat fish on an installation according to prior art.

Fig. 2 shows an installation according to the invention seen from above and next to the side to the left mounted on a mounting plate with a fish processing table and with a mounted scraper and an electric driving unit.

Fig. 3 shows the installation in Fig. 2 seen from the side of processing mounted on a mounting plate with a fish processing table with a mounted scraper and an electric driving unit.

Fig. 4 shows an installation according to the invention, where the driving belt is a chain and the wheel-disc has teeth. Detailed description.

Fig. 1 shows the principle by processing a flat fish on an installation according to prior art. The installation is shown in Fig. A in DK066395. The installation comprises a left and a right wheel-disc (not shown), a driving belt for this, a scraper for removing side fin from the driving belt and an electric driving unit associated with the right wheel-disc. A flat fish is kept in the hand as shown in Fig. 1 , and the side fin is guided in between the driving belt and the left felloe. It is only suitable for small fish.

Fig. 2 shows also an installation (1 ) according to the invention also mounted with a left wheel-disc (2) and a right wheel-disc (5), which is driven by an electric driving unit (8) associated the right wheel-disc’s axis. On the left wheel-disc (2) is a driving belt (3). After the left wheel-disc in the direction of the driving belt there is a scraper (4). These elements are also on an installation according to prior art, see DK066395. Opposite the installation according to prior art the installation shown in Fig. 2 is mounted on a mounting plate by means of a fork. The electric driving unit (8) is also mounted on this. The scraper (4) is in Fig. 2 also mounted on the mounting plate such that it is at the bottom by the downside of the driving belt’s (3) circumference in the middle of the wheel-discs (2 and 5), and such that the innerside of the driving-belt (3) in its whole width glides below the downside of the scraper’s (4) arm (10). A processing table (9) is adapted to, that a flat fish (11 ) may be placed there, the fin (7) of which is brought in between the driving belt and the felloe (12) of the wheel-disc. On an installation of the invention there is mounted a fish processing table (9), such that the driving belt (3) runs ahead/to the left along the side of the surface of the processing table (9). The two wheel-discs and the scraper (2) on the installation (1 ) in Fig. 2 is made from stainless steel, but it may also be made from another suitable material. The driving belt is a belt made from a suitable non-elastic material for example a chain, in which case the wheel-disc has teeth. In the example the radius of the wheel-discs are about 100 mm and the breath of the felloe about 10 mm, whereas the length of the driving belt/chain is about 900 mm with a breath/diameter of about 9 mm, but all suitable lengths may be applied. In the example in Fig. 2 there is an electric unit (8) connected to the axis of the right wheel-disc (5) and a fork is connected to the axis of the left wheel-disc (2). Both wheel-discs are mounted firm on a mounting plate (6), on which the fish processing table (9) also are mounted, such that the belt (3) runs forward/towards the left along the side of the surface of the fish processing table/table plate, in a horizontal distance of about 5 mm from the table plate and in a vertical distance of 5 mm over the upper edge of the table plate. Distances of 3 to 7 mm are suitable dependent on the thickness of the flat fish. The scraper (4) is mounted firm to the mounting plate (6), such that it is at the lower by the downside of the circumference of the belt, in the middle between the wheel-discs (2, 5), and such that the inner side of the driving belt in all its breath glides beneath the downside of the scraper’s arm (10). The electric unit (8) runs the right wheel-disc (2) and herewith the whole installation (1 ), that facilitates that the belt (3) run forwards along the side of the surface of the processing table (9).

If there is used a driving belt the felloe on the wheel-discs have a recess (12), where the non-elastic belt is mounted, which causes, that the fin gets stuck and is torn from the fish together with the small bones, which sticks to the fin, which causes that the fish except from the spine to become complete free from bones. By this processing method on this installation it is possible to filets small fish and some a little larger flat fish, whereas even larger flat fish requires, that even larger pulling forces for removing the flat fish may be applied.

Fig. 2 shows also the fin (7) of the flat fish (11 ) pushed in between the belt (3) and the recess (12) in the felloe of the wheel-drives (2, 5). The distances between the fish processing table (9), the driving belt (3), and the wheel-disc (2) are visible.

Fig. 3 shows a layout drawing of an installation according to the invention, where the driving belt (3) is a chain (13), and where the wheel-disc (2) has teeth (14). The installation comprises in addition the same elements as the installation shown in Fig. 2.

Fig. 4 shows an installation according to the invention, where the driving belt is a chain, and where the wheel drive has teeth. The installation comprises in addition the same elements as the installation shown in Fig. 2.

A yet other embodiment comprises in addition a knife mounted arranged to cut over a flat fish’s fin along the side fin, if the skin has not previously been removed.

A suitable processing method for removing a side fin and small bones all the way into the spine is as described in claim 9, that the side fin after that the head has been cut off and the fish’s skin has optionally been taken off, is lead out over the edge of the table in front of the knife In the direction of the driving belt, such that the fish if the skin of the side has not been removed, is cut through and followingly seized between the installation’s driving belt (3) and the felloe on the rotating left wheel-disc (2), whereby the side fin with the edge of processing table as counter holder for the flat fish, because the flat fish’s is squeezed firmly on the wheel-disc (2), is pulled strongly down such that the side fin and small bones are pulled out of the fish and continues between the belt and the left wheel-disc’s felloe onwards to the scraper, which removes the side fin together with the small bones from the driving belt, while the fish stays on the processing table.

By the invention the side fins and small bones are removed on even lager fish than by methods according to prior art, that cannot even remove the side fins and thus do not work on larger flat fish, because the pulling force is too little. The new installation and processing method will make it more economical to catch and process many different flat fish, as the processing costs are small.

Reference number description.

1. Installation which removes side fins and small bones from flat fish

2. Left wheel-disc

3. Belt

4. Scraper/belt cleaner

5. Right wheel-disc (driving unit)

6. Mounting plate

7. The side fin of the flat fish

8. Electric driving unit

9. Fishprocessing table

10. Arm on scraper

11. Flat fish

12. Recess in the felloe of the wheel-disc

13. Axis of the wheel-disc

14. For