| 摘要 |
Apparatus for cutting out the vent of a fowl having at least one cutting means, having a hollow cylindrical knife rotating about a center pin, being axially reciprocable relative to the knife and being provided with an onion-shaped knob at its lower end; a clamping sleeve being axially slidable mounted on the center pin with the rotating knife; the relative movements of the center pin, the clamping sleeve and the knife being controlled in such manner that the center pin and the sleeve are first moved together towards the fowl until the center pin, whch protrudes over some distance from the sleeve is inserted into the vent opening and the lower edge of the sleeve contacts the fowl's vent, after which the center pin is drawn into the sleeve, so that the vent is firmly clamped between them, the center pin and the sleeve then are withdrawn over a short distance while the rotating knife is moved towards the fowl and is withdrawn again after cutting out the vent and finally the pin is pushed out of the sleeve again to release the vent.
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