| 摘要 |
A method and a machine for cutting a nape muscle of a fish from a front-part of a fish, after the fish has been parted, and removing the fish skin from the nape muscle. The method includes moving the front part along a fixed, straight track to and past vertical circular knives which cut vertical cuts at each side of the spinal crest and at the same time to and past horizontal fixed knife blade edges, fixed on the leading portion of a plough structure, which in turn is fixed to the shaft mount for the shaft of the circular knives. The plough structure cuts lateral cuts from the spine to the skin, but not through the skin. The outermost side part of the plough structure, the plough spade, is not sharp and is used to tear the nape muscle from the attached skin, when the skin is pulled forwards through a gap formed between the plough spade and a sliding table below the plough structure, the nape muscle being retained at the upper surface of the plough structure. The machine delivers the nape muscles without bones and without skin. The machine makes the lateral cuts opposite the bones and removes the skin from the nape muscles, with a tool structure including a gap between a plough and a table, the skin passing through the gap, so the skin is pulled through the gap while the plough spade retains the nape muscle and turns it over sidewards to a slide. For different sizes of fish the cutting unit is fixed on a parallelogram structure with a sensing sled to sense the height of the front part and raises or lowers the cutting unit. A more simple type of machine can cut the nape muscles, but not remove the skin.
|
