CA1203958A - Device for the beheading of fish - Google Patents
Device for the beheading of fishInfo
- Publication number
- CA1203958A CA1203958A CA000438691A CA438691A CA1203958A CA 1203958 A CA1203958 A CA 1203958A CA 000438691 A CA000438691 A CA 000438691A CA 438691 A CA438691 A CA 438691A CA 1203958 A CA1203958 A CA 1203958A
- Authority
- CA
- Canada
- Prior art keywords
- fish
- head
- rump
- knife
- cutting
- 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.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
- A22C—PROCESSING MEAT, POULTRY, OR FISH
- A22C25/00—Processing fish ; Curing of fish; Stunning of fish by electric current; Investigating fish by optical means
- A22C25/14—Beheading, eviscerating, or cleaning fish
- A22C25/145—Eviscerating fish
-
- A—HUMAN NECESSITIES
- A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
- A22C—PROCESSING MEAT, POULTRY, OR FISH
- A22C25/00—Processing fish ; Curing of fish; Stunning of fish by electric current; Investigating fish by optical means
- A22C25/14—Beheading, eviscerating, or cleaning fish
- A22C25/142—Beheading fish
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Food Science & Technology (AREA)
- Processing Of Meat And Fish (AREA)
- Farming Of Fish And Shellfish (AREA)
Abstract
ABSTRACT
The invention concerns a device for the economical separating of the head from fish whose gill cavity is opened ventrally by a throat cut. The aim is to prepare the rump of the fish such that finally the production fo boneless fillets of highest yield becomes possible. For that reason the beheading cut occurs while deviating the head with respect to the rump, a stretching of the muscle flesh over the bones connecting the shoulder girdle with the head skeleton thus being achieved so that these bones are separated together with the head. The parts of the shoulder girdle remaining in the rump can be pared out before the filleting.
The invention concerns a device for the economical separating of the head from fish whose gill cavity is opened ventrally by a throat cut. The aim is to prepare the rump of the fish such that finally the production fo boneless fillets of highest yield becomes possible. For that reason the beheading cut occurs while deviating the head with respect to the rump, a stretching of the muscle flesh over the bones connecting the shoulder girdle with the head skeleton thus being achieved so that these bones are separated together with the head. The parts of the shoulder girdle remaining in the rump can be pared out before the filleting.
Description
~oxdischer Maschinenbau Rud. Baader GmbH -I Co RG, Geniner Strasse 249, 2400 Lubec]c 1, Germany Device for Separating the Heads from Fish The invention eoncerns a device for separating the heads from fish whose gill cavity has been opened ventrally by a throat cut, the device comprising a cutting device for separating the head from the nape resp. the cranium by incision, said cutting device including a cutting edge and a conveyor includiny at least one conveying element for moving the fish against the cutting device.
The shoxtage of the raw product fish going hand in hand with an increase in the cost of labour makes it necessary to ensure that this valuable protein carrier is mad e:Efective as efficiently as possible Thus, within the demand for as full a use of this raw product as possible att0ntion should be paid especially to supplying as large a part of fish meat as possible in highly qualitative form for human nutrition. Such a form of use is the 15 fish fillet The so-calLed round cut for removing the head is known from the pr3cess for producing klipfish - also known as salt fish and stockfish (dried cod). In this round cut the cutting is per-formed such that the bone arch ox the shoulder girdle limiting the gill 20 cavity towards the rump of the fish as well as parts ox the head skeleton remain on the rump of the fish. The skeleton par-ts effect in the desired way that the belly flaps are supported during the spread storaye after the salting and the simultaneous drying so that the fish rump form remains essentially stable. A device for 25 such a cutting can he taken from e.g. German Patents 395 455 and 20 58 165.
- 1 - .
Al. fr,P~t313~
Such a cuttillg perEormance, however, is not suitable as a preparatory workirl~ step for gaining fillets since in this case the named skeleton parts together with the fin roots of the pectoral fins connected to the shoulder girdle and the pectoral fins them-selves remain on the fillets.
The method applied for removing the head in the gaining of fillets therefore uses in the known manner the cutting called a wedge cut. In this type of cutting two cuts are performed start-ing directly behind the pectoral fins and meeting in the plane of symmetry of the fish and whose cutting planes are inclined with respect to the plane of symmetry in order to gain the valuable neck flesh as well. Such devices can be taken e.g. from Herman Patents 11 77 783 and 11 28 617. The result is that the shoulder girdle, together with the head, is separated from the rump of the fish which can also be achieved by a clean cut, which, as can he seen a.g. from German Patent 14 54 081, is guided diagonally through the fish immediately behind the roots of the pectoral fins.
As can be seen from practice the possible yield of fish flesh is unsatisfactory Considering the above mentioned aspects of the importance of fish meat as a protein carrier for human nutrition and the effectiveness thereof in the form of fish fillets etc. as the background o the present invention it is an essential object of the latter to obtain fillets under those aspects represented aboveO It is a more particular object ox the present invention to keep the loss of fillet fish as low as possible by the kind of head jut carried out.
The shoxtage of the raw product fish going hand in hand with an increase in the cost of labour makes it necessary to ensure that this valuable protein carrier is mad e:Efective as efficiently as possible Thus, within the demand for as full a use of this raw product as possible att0ntion should be paid especially to supplying as large a part of fish meat as possible in highly qualitative form for human nutrition. Such a form of use is the 15 fish fillet The so-calLed round cut for removing the head is known from the pr3cess for producing klipfish - also known as salt fish and stockfish (dried cod). In this round cut the cutting is per-formed such that the bone arch ox the shoulder girdle limiting the gill 20 cavity towards the rump of the fish as well as parts ox the head skeleton remain on the rump of the fish. The skeleton par-ts effect in the desired way that the belly flaps are supported during the spread storaye after the salting and the simultaneous drying so that the fish rump form remains essentially stable. A device for 25 such a cutting can he taken from e.g. German Patents 395 455 and 20 58 165.
- 1 - .
Al. fr,P~t313~
Such a cuttillg perEormance, however, is not suitable as a preparatory workirl~ step for gaining fillets since in this case the named skeleton parts together with the fin roots of the pectoral fins connected to the shoulder girdle and the pectoral fins them-selves remain on the fillets.
The method applied for removing the head in the gaining of fillets therefore uses in the known manner the cutting called a wedge cut. In this type of cutting two cuts are performed start-ing directly behind the pectoral fins and meeting in the plane of symmetry of the fish and whose cutting planes are inclined with respect to the plane of symmetry in order to gain the valuable neck flesh as well. Such devices can be taken e.g. from Herman Patents 11 77 783 and 11 28 617. The result is that the shoulder girdle, together with the head, is separated from the rump of the fish which can also be achieved by a clean cut, which, as can he seen a.g. from German Patent 14 54 081, is guided diagonally through the fish immediately behind the roots of the pectoral fins.
As can be seen from practice the possible yield of fish flesh is unsatisfactory Considering the above mentioned aspects of the importance of fish meat as a protein carrier for human nutrition and the effectiveness thereof in the form of fish fillets etc. as the background o the present invention it is an essential object of the latter to obtain fillets under those aspects represented aboveO It is a more particular object ox the present invention to keep the loss of fillet fish as low as possible by the kind of head jut carried out.
2 --
3~
According to the present invention these objects are achieved by a device for processing fish having at least a head, a cranium in the region of said head, a nape, a rump defining a ventral and a back side, and a gill cavity opened ventrally by means of a throat cut by separating said head from said rump, said device comprising at least cutting device means defining cutting edge means for separating said head by an incision starting from said nape resp. cranium, and further comprising conveyor means for conveying said fish against said cutting device means and comprising at least one entraining element being moved along a path of movement. The cutting device means comprise knife means defining a cutting plane which is arranged to cross said path of movement at an 15 angle, and further defining flanks, and wherein deviation elements are arranged to cover said flanks in a manner which leaves said cutting edge means free.
In general, the invention enables an improvement in the yield with simultaneous guarantee of the "bonelessness"
20 of the fillets to be gained, the cutting occurring such that for the time being the belly or ventral portion of the shoulder girdle can remain on the rump of the fish while the dorsal part of the shoulder girdle'is separated together with the bones ~post-temporalia) forming the 25 connection to the head skeleton. The belly portion of the shoulder girdle which remains on the rump can be scraped or pared out very economically in a successive procedural step. This step can be performed e.g. in a successive filleting machine. The advantages thus achieved lie parti-30 cylarly in that on one hand the separating cu-t can be started well above the cranium and on the other due to the increasing turning away resp. deviation of the head and the pushing back of the head taking place with increasing cutting a stretching of the muscle flesh over -3-~
~33~3~
said bones forming the connection to the head skeleton occurs which enables the economical separation of said bones in the further procedu /
/
/
-3a-~33~
In a preferred embodiment of the device wi-th a conveyor moving the fish by engagement in its gill cavity the deviation element facing the head of the fish can be arranged with its deviating surface essentially tangential to the path of the contour of the conveying element of the conveyor facing the rump of the fish.
The application of a circular knife makes a functionally advantageous as well as an economical construction possible, the arrangement of a bevel on the flank of the knife facing the head of the fish and its positioning aLmost in the plane Oc the median line between both deviation elements produciny an especially convincing result.
Other and further objects of the present invention will be apparent from the following description and claims and are illustrated in the accompanying drawings which by way of illustrat.ion schematically show preferred embodiments of the present invention and the principles thereof and what now are considexed to be the best modes contemplated for applying these principlesO Other embodiments of the invention embodying the same or equivalent principles may be used and structural changes may be made as desired by those skilled in the art without departing from the present invention and the scope of the appended claims.
Fig. 1 shows a greatly s~nplified axonometrical represen-tation of thy device, Fig. 2 shows a schematic representation pointing to theworki~g process of the cutting device shortly aftex commenc~n2nt of the beh~adin~ cut/
Fig. 3 shows a representation according to Fig. 2 shortly before the completion of the beheading cut.
3,~3~3 In a not-shown frame oE a beheading machine Eor wish a cu-tting device 1 is arranged comprising a knife 2 mounted fixedly on the frame, driven in a suitable manner and formed as a circular knife.
Its Cutti.nCJ plane extends essentially perpendicular with respect to a not-shown, essentially horizontal fish support into which a cut-ting ~dgf 3 of the knife 2 penetrates. Flanks 4 of the la-tter are covered by mean6 Qf the deviation elements 5 and 6 which are fixedly arranged on said frame. These elements merely leave the cutting edge 3 of the knife 2 free and are each at an angle of approximately 25 to its cutting plane. The knife 2 has a bevel 7 at the flank 4 covered by means of the deviation element 5. I'he plane of the deviatisn element 5 is essentially tangential to a path 9 of a conveyQr 8 n The latter comprises a support arm 11 and a V-shaped entraining element 12 at the free end of the support arm 11 such that an outer contour 13 of the entraining element 12 runs just free with respect to the plane of the deviation element 5, the arm being driven to pivot about an axis 10 essentially perpendicular tv the fish support.
The method of operation of the device is as follows:
A ish lying on its side on the fish support with its gill cavity opened ventrally is pushed by supporting its back by means of a not-shown resiliently yielding back support to reach with its Jill cavity a position crossing the path 9 of the entraining element 12~ This position can be controlled by means of a suit-able feeling or detecting device, e.g. a feeling lever gripping into the gill cavity. This feeling lever causes the pivoting of the conYeyQr 8 out of its rest position in which it had been up to now. The pivoting causes the penetration of the entraining element 12 into the gill cavity of the fish, the entraininy of the fish occurring without the danger of twisting by the support-ing due to the V-shape of the entraining element 12. The fish is guided to the knife 2 of the cutting device 1 in this manner. The S knife 2 then cuts out the head of the fish becJinning immediately below the cranium. In the further course of the beheading cut the deviation elements 5 and 6 effert the pushing back or deviating of the head and rump respectively with the result that a stretching of the muscle flesh over the bones formiIlg the connection to the head skeleton is achieved entraining with it the shoulder girdle so that finally an economical separation of the latter occurs in the region where said connecting bones start. The parts of the shoulder girdle which, following this processing, are still positioned on the rump of the fish can be removed very economically in a known manner by a successive operation before the fillets are gained from the bone skeleton.
According to the present invention these objects are achieved by a device for processing fish having at least a head, a cranium in the region of said head, a nape, a rump defining a ventral and a back side, and a gill cavity opened ventrally by means of a throat cut by separating said head from said rump, said device comprising at least cutting device means defining cutting edge means for separating said head by an incision starting from said nape resp. cranium, and further comprising conveyor means for conveying said fish against said cutting device means and comprising at least one entraining element being moved along a path of movement. The cutting device means comprise knife means defining a cutting plane which is arranged to cross said path of movement at an 15 angle, and further defining flanks, and wherein deviation elements are arranged to cover said flanks in a manner which leaves said cutting edge means free.
In general, the invention enables an improvement in the yield with simultaneous guarantee of the "bonelessness"
20 of the fillets to be gained, the cutting occurring such that for the time being the belly or ventral portion of the shoulder girdle can remain on the rump of the fish while the dorsal part of the shoulder girdle'is separated together with the bones ~post-temporalia) forming the 25 connection to the head skeleton. The belly portion of the shoulder girdle which remains on the rump can be scraped or pared out very economically in a successive procedural step. This step can be performed e.g. in a successive filleting machine. The advantages thus achieved lie parti-30 cylarly in that on one hand the separating cu-t can be started well above the cranium and on the other due to the increasing turning away resp. deviation of the head and the pushing back of the head taking place with increasing cutting a stretching of the muscle flesh over -3-~
~33~3~
said bones forming the connection to the head skeleton occurs which enables the economical separation of said bones in the further procedu /
/
/
-3a-~33~
In a preferred embodiment of the device wi-th a conveyor moving the fish by engagement in its gill cavity the deviation element facing the head of the fish can be arranged with its deviating surface essentially tangential to the path of the contour of the conveying element of the conveyor facing the rump of the fish.
The application of a circular knife makes a functionally advantageous as well as an economical construction possible, the arrangement of a bevel on the flank of the knife facing the head of the fish and its positioning aLmost in the plane Oc the median line between both deviation elements produciny an especially convincing result.
Other and further objects of the present invention will be apparent from the following description and claims and are illustrated in the accompanying drawings which by way of illustrat.ion schematically show preferred embodiments of the present invention and the principles thereof and what now are considexed to be the best modes contemplated for applying these principlesO Other embodiments of the invention embodying the same or equivalent principles may be used and structural changes may be made as desired by those skilled in the art without departing from the present invention and the scope of the appended claims.
Fig. 1 shows a greatly s~nplified axonometrical represen-tation of thy device, Fig. 2 shows a schematic representation pointing to theworki~g process of the cutting device shortly aftex commenc~n2nt of the beh~adin~ cut/
Fig. 3 shows a representation according to Fig. 2 shortly before the completion of the beheading cut.
3,~3~3 In a not-shown frame oE a beheading machine Eor wish a cu-tting device 1 is arranged comprising a knife 2 mounted fixedly on the frame, driven in a suitable manner and formed as a circular knife.
Its Cutti.nCJ plane extends essentially perpendicular with respect to a not-shown, essentially horizontal fish support into which a cut-ting ~dgf 3 of the knife 2 penetrates. Flanks 4 of the la-tter are covered by mean6 Qf the deviation elements 5 and 6 which are fixedly arranged on said frame. These elements merely leave the cutting edge 3 of the knife 2 free and are each at an angle of approximately 25 to its cutting plane. The knife 2 has a bevel 7 at the flank 4 covered by means of the deviation element 5. I'he plane of the deviatisn element 5 is essentially tangential to a path 9 of a conveyQr 8 n The latter comprises a support arm 11 and a V-shaped entraining element 12 at the free end of the support arm 11 such that an outer contour 13 of the entraining element 12 runs just free with respect to the plane of the deviation element 5, the arm being driven to pivot about an axis 10 essentially perpendicular tv the fish support.
The method of operation of the device is as follows:
A ish lying on its side on the fish support with its gill cavity opened ventrally is pushed by supporting its back by means of a not-shown resiliently yielding back support to reach with its Jill cavity a position crossing the path 9 of the entraining element 12~ This position can be controlled by means of a suit-able feeling or detecting device, e.g. a feeling lever gripping into the gill cavity. This feeling lever causes the pivoting of the conYeyQr 8 out of its rest position in which it had been up to now. The pivoting causes the penetration of the entraining element 12 into the gill cavity of the fish, the entraininy of the fish occurring without the danger of twisting by the support-ing due to the V-shape of the entraining element 12. The fish is guided to the knife 2 of the cutting device 1 in this manner. The S knife 2 then cuts out the head of the fish becJinning immediately below the cranium. In the further course of the beheading cut the deviation elements 5 and 6 effert the pushing back or deviating of the head and rump respectively with the result that a stretching of the muscle flesh over the bones formiIlg the connection to the head skeleton is achieved entraining with it the shoulder girdle so that finally an economical separation of the latter occurs in the region where said connecting bones start. The parts of the shoulder girdle which, following this processing, are still positioned on the rump of the fish can be removed very economically in a known manner by a successive operation before the fillets are gained from the bone skeleton.
Claims (5)
1. A device for processing fish having at least a head, a cranium in the region of said head, a nape, a rump defining a ventral and a back side, and a gill cavity opened ventrally by means of a throat cut by separating said head from said rump, said processing device comprising at least cutting device means defining cutting edge means for separating said head by an incision starting from said nape resp. cranium, and further comprising conveyor means for conveying said fish against said cutting device means and comprising at least one entraining element being moved along a path of movement, wherein said cutting device means comprise knife means defining a cutting plane which is arranged to cross said path of movement at an angle, and further defining flanks, and wherein deviation elements are arranged to cover said flanks in a manner which leaves said cutting edge means free.
2. A device as claimed in claim 1, wherein said conveyor means convey said fish by penetrating said gill cavity, one of said deviation elements facing said conveying means and having a deviating surface arranged essentially tangential to said path of movement, said entraining element on the side thereof facing said rump of said fish.
3. A device as claimed in any one of claims 1 and 2, wherein said deviation elements are arranged at an angle to each other and wherein said knife means lie approximately in the plane of the median line of said angle.
4. A device according to any one of claims 1 and 2, wherein said knife means comprise a bevel on their flank facing said conveyor means.
5. A device as claimed in any one of claims 1 and 2, wherein said knife means are formed as a circular knife.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3237725.8-23 | 1982-10-12 | ||
| DE3237725A DE3237725C1 (en) | 1982-10-12 | 1982-10-12 | Apparatus for removing the head from fish |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1203958A true CA1203958A (en) | 1986-05-06 |
Family
ID=6175503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000438691A Expired CA1203958A (en) | 1982-10-12 | 1983-10-11 | Device for the beheading of fish |
Country Status (6)
| Country | Link |
|---|---|
| CA (1) | CA1203958A (en) |
| DD (1) | DD210601A5 (en) |
| DE (1) | DE3237725C1 (en) |
| DK (1) | DK408783A (en) |
| IS (1) | IS2850A7 (en) |
| NO (1) | NO833682L (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3233747C1 (en) * | 1982-09-11 | 1983-10-20 | Nordischer Maschinenbau Rud. Baader GmbH + Co KG, 2400 Lübeck | Device for tapping fish with a throat |
| IS4559A (en) * | 1997-09-15 | 1999-03-16 | Marel Hf. | Method and equipment for fish processing |
-
1982
- 1982-10-12 DE DE3237725A patent/DE3237725C1/en not_active Expired
-
1983
- 1983-09-09 IS IS2850A patent/IS2850A7/en unknown
- 1983-09-09 DK DK408783A patent/DK408783A/en not_active Application Discontinuation
- 1983-10-10 NO NO833682A patent/NO833682L/en unknown
- 1983-10-10 DD DD83255545A patent/DD210601A5/en unknown
- 1983-10-11 CA CA000438691A patent/CA1203958A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DD210601A5 (en) | 1984-06-20 |
| DK408783A (en) | 1984-04-13 |
| DK408783D0 (en) | 1983-09-09 |
| DE3237725C1 (en) | 1983-07-07 |
| NO833682L (en) | 1984-04-13 |
| IS2850A7 (en) | 1983-10-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |