DE1128618B - Process for the machine production of fin-free fillets - Google Patents

Description

INTERNAT.KL. A 47 j

GERMAN

PATENT OFFICE

B 23857 X / 341

REGISTRATION DATE: 20th YES NU AR 1953

NOTICE
THE REGISTRATION
ANDOUTPUTE
EDITORIAL: APRIL 26, 1962

The invention relates to a method for the machine production of finless fillets from beforehand slaughtered and decapitated fish, in which the ventral and pectoral fins together with the Abdominal flap cut off by two cuts perpendicular to the plane of symmetry of the fish and the fillets from the bones and the caudal and dorsal fins by parallel to the plane of symmetry cuts guided by the fish are cut free or separated. The purpose of the invention is to the easiest way to achieve a completely fin-free fillet without affecting the meat yield in any way.

Filleting processes are known in large numbers, but have so far not been used in machine operations Fully satisfactory results were obtained when fin-free fillets were valuable with as little loss as possible Fish meat are to be produced. This is especially the case when - as for example with White fish - pelvic and pectoral fins are so unfavorable that they can be removed in the usual way can only be done without any consideration of major meat losses.

The invention is based on the knowledge that the goal can only be reached if you go the distance the abdominal and pectoral fins in any case separate and from before the head is cut off After the decapitated fish, follow the abdominal lobes together with the abdominal and pectoral fins through one the position of these fins separates controlled curvilinear cut. You are now able to use the Cut at a point that best corresponds to the nature of the fish in question, which the guaranteed the lowest possible loss of fish meat. If the pelvic and pectoral fins are removed, so you can easily remove the fillets from the bones by making cuts one after the other First separate from one side and then from the other side of the dorsal fins. On what is left over All of the tail and dorsal fins, including theirs, then hang from the bone stump Fin roots, while all pelvic and pectoral fins are removed through the abdominal flap incisions. The fillets are completely fin-free, with all valuable meat parts remaining on the fillets.

Since the two cuts for separating the fillets, in order to avoid any unnecessary loss of meat, are best made as a wedge cut, the method can advantageously be carried out in such a way that, by slightly turning the fish around its longitudinal axis, the cuts are made in two different, one wedge cut resulting angular positions are performed. Da process for machine production
fin-free fillets

Applicant:

Nordic mechanical engineering Rud. Baader,
Lübeck, Geninerstr. 249

this results in a simplification of the device, because you carry out these cuts Can then arrange knife parallel axis, which simplifies the structure of the drive.

The implementation of the method provided according to the invention is shown schematically in the drawings shown; it shows

Fig. 1 is a diagram of the arrangement of the cutting tools,

Fig. 2 a section through the fish making the incisions between anus and caudal fin,

Fig. 3 a section through the fish while cutting off the belly flaps,

Fig. 4 shows an example of a cut when cutting off the abdominal flap,

Fig. 5 a section through the fish when one half of the fillet is being cut off,

Fig. 6 shows this cut when separating the other half of the fillet.

From Fig. 1 it can be seen that the conveying device consists of a circular table α in which the fish, grasped by the tail, is guided with its back in a trough-shaped groove b in the edge of the table α tightly. The other management organs and all control organs for the tools and all tools for processing steps that are not of interest here have been omitted for the sake of clarity. A parallel pair of circular knives c, d are used to make the cuts between the anus and the caudal fin. How the otherwise known section is made can be seen from FIG. From Fig. 4 it can be seen that the fins marked there with e are separated from the fillets.

209 577/28

The rotating circular knives /, g lying on top of each other in one plane perform the abdominal flap incision. The knives are controlled in such a way that the cut achieved corresponds to a precisely defined curve, as shown, for example, in Fig. 4 at h . As a result of these cuts, the pelvic fins i and the pectoral fins k are also cut off on both sides, as can be clearly seen from FIG. 4.

The subsequent cuts to completely cut the fillets free from the bones are not shown since they are known per se and are not the subject of the method provided according to the invention. In Fig. 1 this is indicated by an interruption in the work table α . After the fillets have been completely cut free, they are still connected by a strip in which the entire dorsal fins (m in Fig. 4) with their fin roots sit at the same time. In order to remove these and at the same time separate the fillets from one another, a cut is first made with the hooves of the circular knife η from the belly side parallel to the bone trunk and just below it. As can be seen in Fig. 6, the second cut is made parallel to the bone trunk and just above it from the belly side with the hooves of the circular knife ο , which then completely cuts off the back strip containing the dorsal fins with the fin root and also the second fillet is completely free of fins. Since the circular knives and o, as can be seen in Figs. 5 and 6, have to penetrate completely through the fish on the back side, two narrow grooves ρ are provided on the bottom of the trough-shaped groove b at the distance of the two cuts next to the bone trunk.

Claims (2)

PATENT CLAIMS: 1. Process for the machine production of fin-free fillets from previously slaughtered and decapitated fish, in which the ventral and pectoral fins are cut off together with the ventral lobes by cuts perpendicular to the plane of symmetry of the fish and the fillets are cut from the bones and the tail and dorsal fins by parallel to the Cuts guided by the plane of symmetry of the fish are cut free or separated, characterized in that the abdominal flaps are cut off together with the ventral and pectoral fins (1, k) by means of a curved cut (K) controlled according to the position of these fins, followed by the The fillets loosened from the bones are separated from one side and then from the other side of the dorsal fins (m) by making cuts one after the other. 2. The method according to claim 1, characterized in that the successive cuts for separating the two fillets from the dorsal fins (m) are made by slightly rotating the fish about its longitudinal axis in two different angular positions resulting in a wedge cut. Considered publications:
German Patent Nos. 464 330, 550186;
U.S. Patent Nos. 2110416, 2479 010. 1 sheet of drawings © 209 577/28 4.62