DK151523B - Method for tearing off fish heads - Google Patents
Method for tearing off fish heads Download PDFInfo
- Publication number
- DK151523B DK151523B DK485482A DK485482A DK151523B DK 151523 B DK151523 B DK 151523B DK 485482 A DK485482 A DK 485482A DK 485482 A DK485482 A DK 485482A DK 151523 B DK151523 B DK 151523B
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- DK
- Denmark
- Prior art keywords
- head
- fish
- spine
- gill
- tearing
- Prior art date
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- Processing Of Meat And Fish (AREA)
Description
151523151523
Opfindelsen vedrører en fremgangsmåde til adskillelse af hovedet fra kroppen på fisk, hvis gællehule er åbnet ventralt med et strubesnit.The invention relates to a method of separating the head from the body of fish whose gill cavity is opened ventrally with a larynx.
5 Adskillelsen af fiskehoveder sker sædvanligvis ved en skærende gennemtrængning af fiskens totale tværsnit i eller i nærheden af gællehulen. Man betjener sig for at opnå det størst mulige udbytte af værdifuldt fiskekød fortrinsvis af et apparat med to i forhold til 10 hinanden med en stump vinkel indstillede cirkelknive, der gennemskærer fisken omtrent symmetrisk i forhold til dens symmetriplan. Et sådant apparat er f.eks. beskrevet i det tyske patentskrift nr. 11 77 783.5 The separation of fish heads is usually effected by a cutting penetration of the total cross-section of the fish in or near the gill cavity. It is used to obtain the greatest possible benefit from valuable fish meat, preferably of an apparatus with two relative to each other with a blunt angle set of circular knives that cut the fish approximately symmetrical with respect to its plane of symmetry. Such an apparatus is e.g. disclosed in German Patent Specification No. 11 77783.
15 En anden kendt fremgangsmåde til afskæring af hovederne består i anvendelse af en cirkelkniv, som med sit snitplan bliver ført vinkelret på fiskens symmetriplan og skærer ind fra kraniets overside (os frontale) til den kraftige kranieknogle occipitale, hvor-20 efter det tynde muskelvæv (isthmus) gennemskæres med et strubesnit. Med dette såkaldte rundsnit forbliver gællebueknoglerne på fiskens krop og kan i en særlig arbejdsgang fjernes forud for filetteringen. Et sådant apparat kan eksempelvis ses i det tyske patent-25 skrift nr. 15 79 416.Another known method of cutting the heads consists of using a circular knife which, with its cut plane, is carried perpendicular to the plane of symmetry of the fish and cuts from the top of the skull (us frontal) to the powerful skull bone occipital, whereupon the thin muscle tissue ( isthmus) cut with a larynx. With this so-called circular cut, the gill bones remain on the fish's body and can be removed in a special operation prior to filleting. Such an apparatus can be seen, for example, in German patent specification 15 79 416.
Disse fremgangsmåder til afskæring af fiskehoveder formår dog ikke på tilfredsstillende måde at frembringe det maksimalt mulige udbytte af fiskekød til 30 menneskelig konsum, fordi det ikke er muligt at indvinde det på begge sider af den stangagtige knogle os occipitale superius på kranieoversiden liggende muskelkød. Det er derfor blevet forsøgt at aftage hovedet ved afrivning, idet isthmus er blevet gennemskå- 2 151523 ret. Et sådant apparat er beskrevet i det norske patentskrift nr. 140 576, og ifølge hvilket hovedet bøjes helt bagover ned langs kroppen og afrives fra denne i denne stilling. Heller ikke udbyttet af denne 5 fremgangsmåde kan betegnes som tilfredsstillende, fordi det ikke er sikkert, at de nævnte fiskedele frigøres sammen med filetternes muskelkød. Årsagen hertil er, at de på fiskekroppen nu fastsiddende gæl-lebueknogler er forbundet med kranieskeletdelene ved 10 hjælp af sener og ledbånd, hvis vedhæftningssteder alt efter kødets konsistens kan besidde en større styrke end selve kødet. Envidere er afrivningsfladen i kødet udseendemæssigt ikke så tiltalende som ønskeligt, ligesom denne flossede flade bakteriologisk be-15 dømt er ufordelagtig.However, these methods of cutting off fish heads are not able to satisfactorily produce the maximum possible yield of fish meat for human consumption, because it is not possible to recover the muscle flesh lying on both sides of the rod-like bone occipital superius. It has therefore been attempted to remove the head by tearing, as isthmus has been transected. Such an apparatus is described in Norwegian patent specification 140 576, according to which the head is bent completely backwards along the body and is deprived of it in this position. Nor can the yield of this method be considered satisfactory because the fish portions mentioned may not be released together with the muscle meat of the fillets. The reason for this is that the gill bones now attached to the fish body are connected to the skull skeletal parts by means of tendons and ligaments, which, depending on the texture of the meat, may possess a greater strength than the meat itself. Furthermore, the ripening surface of the meat is not as pleasing as desired, and this ragged flat bacteriologically assessed is disadvantageous.
Opfindelsen har derfor som formål at angive en fremgangsmåde, hvormed man kan fjerne hovedet fra fisk, og ifølge hvilken de ovennævnte ulemper afhjælpes.It is therefore an object of the invention to provide a method by which the head can be removed from fish and according to which the above disadvantages are remedied.
2020
Formålet opfyldes ifølge opfindelsen med en fremgangsmåde, ifølge hvilken man først afskærer de på de to gællebueknogler (Schultergurtelbogen) i nærheden af et vinkelret på fiskens symmetriplan gennem ryg-25 søjlen lagt tænkt plan påhæftede ledbånd (supraclei-thrum), at man derefter strækker forbindelsen mellem rygsøjlen og hovedets skeletdele ved at vinkelbøje hovedet i retning mod nakken, og at man i hovedsagen i rygsøjlens længderetning trækker hovedet og kroppen 30 fra hinanden i den vinkelbøjede stilling.According to the invention, the object is met by a method which first cuts off the two planar attachments (supraclei-thrum) perpendicular to the two shoulder arches (Schultergurtelbook) near a perpendicular to the symmetry plane of the fish. between the spine and the skeletal parts of the head by angling the head in a direction towards the neck, and in the main, in the longitudinal direction of the spine, the head and body 30 are pulled apart in the angled position.
Fordelen ved denne fremgangsmåde er specielt, at man ved først at afskære de to ledbånd (supracleithrum), der hindrer, at fiskehovedet kan trækkes af, muliggør 3 151523 en kontrolleret fritrækning af de nævnte fiskedele således, at disse bibeholdes sammen med filletternes muskelkød, og dermed opnår man en sikker udbyttegevinst. Desuden kan man ved anvendelse af fremgangs-5 måden ifølge opfindelsen sikre, at der ikke på fiskekroppen forbliver nogen knogle eller knogledel, som eksempelvis kan hindre den efterfølgende filetteringsproces, hvilket indebærer den fordel, at der opnås besparelser i forbindelse med kvalitetskontrol-10 len og den eventuelle efterbearbejdning af frasorterede filetter.In particular, the advantage of this method is that by first cutting off the two ligaments (supracleithrum) which prevent the fish head from being pulled off, a controlled release of the said fish portions is allowed, so that they are retained along with the fillets' muscle flesh, and thus securing a safe dividend gain. Furthermore, by using the method of the invention, one can ensure that no bone or bone part remains on the fish body, which can, for example, hinder the subsequent filleting process, which has the advantage of obtaining savings in connection with the quality control and the possible post-processing of filtered fillets.
Opfindelsen beskrives nedenfor med henvisning til tegningen, der viser et torskehoved og den forreste 15 del af fiskekroppen set fra siden og med indtegnet profil af væsentlige knogler.The invention is described below with reference to the drawing which shows a cod head and the front part of the fish body viewed from the side and with an inscribed profile of essential bones.
I hovedet og den forreste del af kroppen på en torsk findes to gællebueknogler 1, 2, hvorpå der er vedhæf-20 tet stærke ledbånd (supracleithrum) 4. På tegningen er disse dele, hovedet 5, dettes kranie 7 med den kraftige kranieknogle occipitale 6, fiskens rygsøjle 3 og det tynde muskelvæv isthmus 8 vist. 1 2 3 4 5 6In the head and the front of the body of a cod are two gill bones 1, 2, on which are attached strong ligaments (supracleithrum) 4. In the drawing, these parts, the head 5, are its skull 7 with the powerful skull bone occipital 6 , the spine of the fish 3 and the thin muscle tissue isthmus 8 shown. 1 2 3 4 5 6
Ved udøvelse af fremgangsmåden ifølge opfindelsen fø 2 rer man først en kniv langs hver af gællebueknoglerne 3 1, 2 som antydet på tegningen med en fuldt optrukken 4 og en stiplet profil af et knivblad og således, at de 5 stærke ledbånd 4 overskæres. Derefter bøjes hovedet 6 opad til en vinkelstilling således, at forbindelsen mellem rygsøjlen 3 og hovedets 5 skeletdele 6 stræk kes. Herefter trækkes hovedet 5 og kroppen fra hinanden i en retning som i hovedsagen falder sammen med rygsøjlens retning, idet hovedets og kroppens indbyr- 4 151523 des vinkelstilling opretholdes under dette fremgangsmådetrin.In carrying out the method according to the invention, a knife is first brought along each of the gill arch bones 3 1, 2 as indicated in the drawing with a fully drawn 4 and a dotted profile of a knife blade and so that the 5 strong ligaments 4 are cut. Then the head 6 is bent upwards to an angular position so that the connection between the spine 3 and the skeletal parts 6 of the head 5 is stretched. Thereafter, the head 5 and the body are pulled apart in a direction which substantially coincides with the direction of the spine, maintaining the angular position of the head and body during this process step.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK485482A DK151523C (en) | 1982-11-02 | 1982-11-02 | PROCEDURE FOR REMOVING FISH HEADS. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK485482 | 1982-11-02 | ||
DK485482A DK151523C (en) | 1982-11-02 | 1982-11-02 | PROCEDURE FOR REMOVING FISH HEADS. |
Publications (3)
Publication Number | Publication Date |
---|---|
DK485482A DK485482A (en) | 1984-05-03 |
DK151523B true DK151523B (en) | 1987-12-14 |
DK151523C DK151523C (en) | 1988-05-30 |
Family
ID=8137253
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK485482A DK151523C (en) | 1982-11-02 | 1982-11-02 | PROCEDURE FOR REMOVING FISH HEADS. |
Country Status (1)
Country | Link |
---|---|
DK (1) | DK151523C (en) |
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1982
- 1982-11-02 DK DK485482A patent/DK151523C/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DK485482A (en) | 1984-05-03 |
DK151523C (en) | 1988-05-30 |
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PBP | Patent lapsed |