DK143151B - PROCEDURE AND APPARATUS FOR NERVEBEN-FREE FILETING OF FISH DURING SEPARATE EXTRACTION OF BUGLAPPERS - Google Patents

Description

(11) PUBLICATION OF LETTERS 143151 DENMARK (si) int.ci.1 2 3 4 5 a 22 c 25/16 '(21) Application No 2699/75 (22) Filed on 1 June 6. 1975 (24) Race day 1 6 Jun. 1975 (44) The application forwarded and the petition published on July 6, 1 9 ^ 1

THE DIRECTORATE OF

PATENT AND TRADEMARKET (3 °) Priority * »0» «on

20 dec. 1974, 2460447, DE

(41) Altn. avail. Jun 21 1976 OO NORDIC MASCHINENBAU RUD. BAADER GMBH + CO KG-, Geniner Stras = see 249 PO Box 1102, 2400 Luebeck 1, DE.

(72) Inventor: Gerhard Grot, Aehrenfeld 5, 24 Luebeck, DE: Horst Brae = ger, On the T4, 24 Luebeck, DE.

(74) Plenipotentiary in the proceedings:

Larsen & Birkeholm A / s Scandinavian Patent Office.

(54) Method and apparatus for the bone marrow filleting of fish during separate extraction of the abdominal flaps.

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a method for producing completely 2 boneless fillets of fish and for extracting the abdominal flaps of 3 separate from the fillets and suitable for human feeding. fillets using a pair on the two sides of the abdominal bones made abdominal incisions, a couple on the two sides of the abdominal bores performed a back incision, and a couple over the ribs and vertebrae led rib incisions.

From the specification to Danish Patent Application No. 2265/67 (Patent No. 139123), a fish filleting machine for separate extraction 5 of the abdominal flaps is known with a pair of abdominal knives, a pair of back knives, a pair of nerve knives and a pair of rib knives where the nerve knives are arranged between the abdominal and rib knives, and the planes of the nerve knives, which cut off the transverse pins and vertebrae, form a blunt angle that accommodates the back of the fish, and each of the nerve knives includes a co-shaped guide member.

This machine has a number of drawbacks, the biggest one being that the flaps are not suitable for human food because neither skin on the outside nor black skin on the inside, ribs and vertebrae can be easily removed.

SUMMARY OF THE INVENTION It is an object of the invention to provide an improved method by which the abdominal flaps are recovered free of 20 ribs, vertebrae, black skin and blood vessels, independent of the fillets which are completely without nerve bones.

This is achieved according to the invention in that, after performing the abdominal and back cuts, along the abdominal cavity on each side 25 of the fish near and above the nerve bones, a horizontal incision leading to the vertebrae is made and before the execution of the rib cuts on each side of the fish a substantially vertical incision is made through the fish's abdominal muscle near the back of the abdominal cavity adjacent to the nerve bone, after which the abdominal flaps are completely cut off by means of the rib cuts.

The advantages of the method according to the invention in particular consist in the fact that the fillets and the belly flaps are simultaneously recovered independently of one another, so that the fillets can then immediately be fed to the skin removal machine and the belly flaps can be introduced directly into a separator for making fish mash or fresh.

The invention also includes a fish filleting machine for practicing the method which may conveniently be arranged so that the nerve knives are pivotally mounted in a horizontal plane which tangles the upper edge of the vertebral column and is synchronously movable away from and towards each other, a pair of abdominal muscle knives lie between the nerve-bone knives and the rib knives in vertical planes, each abdominal knife having guide means for guiding the fillets, and a control mechanism operating on the fish along the tools to guide the nerve legs at the abdominal end to perform the incisions above the nerve along the abdominal cavity, as well as for providing the abdominal muscle blades at the abdominal end for cutting across the abdominal muscle of the fish. With such a filleting machine it is possible to cut off the fish's back muscles above the nerve bones and cut through the fish's abdominal muscles, even if the fish is advanced in its longitudinal direction.

The design of the guides or guides and the use of a load or compression apparatus according to claims 3 and M ensure an accurate and safe guiding of the fish during the processing thereof.

The invention will be described in more detail below with reference to the drawing, wherein 30 Pig · 1 shows an axonometric view of a fillet cube machine according to the invention,

FIG. 2 shows a cross-section through the belly of the fish, the right half of which is cut off from the buglan-35 by the abdominal muscle knife, and

FIG. 3 shows an axonometric view of a fish's right fillet divided into a bone-free fillet portion and an abdomen with no black skin, ribs and parapophysis.

In a machine frame not shown there are no feeding means shown for carrying a fish in a trajectory as indicated by arrow 96. In vertical planes pairs of circular bow knives 11,12, back knives 21,22, knives 41,42 for cutting of the fillets from the spine of the fish and the abdominal muscle knives 51.53. In a horizontal plane tangent to the top 10 edge of the vertebral column, a pair of circular nerve knives 31,32 lie, and in planes at an angle to each other, a pair of circular rib knives 8l, 82. While the spaces between the abdominal knives 11,12 , the back knives 21, 22, the knives 4, 42 for separation, and the rib knives 15, 82 remain unchanged, the nerve knives 31, 32 are pivotally positioned toward and away from each other, and the abdominal muscle knives 51, 53 are displaceable from each other. Each of the abdominal muscle knives 51.53 has a guide 6 or 69 for control, and a load or pushing device 7 for pressing the fillet down on the guide 6 to stretch and transport it after cutting. The guide 6 consists of a plate 6l located immediately adjacent to the outside of the abdominal muscle knife 51, and a carrier plate 66 for the fillet, the plate 6l having a cut 62 for the egg 52 of the abdominal muscle 51, a back muscle guide 63 with a chin 64 over cut 62 and abdominal liner 65, and inlet end of support plate 66 is formed as inlet or inlet edge 67 while its outer edge forms guide 68 for fillet. The loading load or the pressing means 7 is pivotal about an axis 72 against spring force and includes a pivot arm 71 with a blade plate 75 attached at the lower end o. containing a shaft 73 with spindle roller 74 at the free end.

The operation is as follows: 35 A fish whose head is cut off and whose abdominal cavity is cleaned is brought forward with the abdomen and tail end in the direction of arrow 96. During feeding, the fish is first cut in the tail on both sides of the abdominal legs, viz. of the abdominal knives 11, 12, then along the spine on both sides of the spinal bones, of the spinal knives 21, 22, and then in the vicinity of and above the nerve bones along the abdominal cavity of the fish, of the nerve leg knives 31> 32. As the fish continue to advance, the cutters 41, 42 make two cuts that completely separate the tail of the fish fillets from the vertebral column. The tail portion is inserted on the guide 6.69 and the spike rollers 74 engage and stretch it. Immediately after the arrival of the abdominal end of the guides 6.69, the abdominal knives 51, 53 are moved from the inside outwards, thereby cutting the abdominal muscles 94 and cutting the fillets 92. As the fish continue to advance, two rib cuts are made by the rib knives 81.82, whereby the flaps 95 are cut and released from the vertebral column. In FIG. 1, the pressing means 7, 77 are pivotal about an axis 72. In fact, they are assigned to positions 78 and 79 ·

Claims (2)

6 143151 A method for producing completely boneless fillets of fish and for extracting the abdominal flaps separate from the fillets, wherein the method, after cutting the head, is advanced with the tail end front and the abdomen down and is filleted by a pair of the two sides of the abdominal bones carried a cut, a pair of the two sides of the back bones carried a cut, and a pair of the ribs and vertebrae led rib cuts, characterized in that, after the execution of the abdominal cuts and back cuts, 10 along the abdominal cavity on each side of the fish near and above the nerve bones, a horizontal incision is made near the vertebrae, and prior to performing the rib cuts on each side of the fish, a substantially vertical incision is made through the fish's abdominal muscle near the back of the abdominal cavity adjacent to the nerve section, whereupon the flaps become cut completely off using the rib cuts. A fish filleting machine for carrying out the method 20 according to claim 1, with a conveyor for feeding the fish with the bow down and the tail end at the front, a pair of belly knives, a pair of back knives, a pair of rib knives and a pair of nerve knives, characterized in that the nerve knives (31, 32) are arranged pivotally in a horizontal plane tangent to the upper edge of the vertebral column and are synchronously movable away from and towards each other that a pair of abdominal muscle knives (51,53) lie between the nerve knives (31,32) and the rib knives (81.82) in vertical planes, wherein each abdominal muscle knife (51.53) has a guide (6.69) for guiding the fillets, and there is a 30 depending on the fish transport along the tools operating guide mechanism for guiding the nerve knives ( 31, 32. at the abdominal end to perform the incisions over the lower limb along the abdominal cavity and to provide the abdominal muscle knives (51.53) at the abdominal end for cross-cutting through the abdominal muscle of the fish.