Apparatus for dividing into separate parts an assembly comprising heart and lungs

Abstract: The invention relates to an apparatus for dividing into separate parts an assembly removed from an entrails package of a slaughtered bird comprising heart and lungs. The apparatus comprises two rotating axes (12) defining a slit (4) therebetween. A first part (3) of the axes is provided with a coarse profile (7,8), whereas a successive second part (9) is provided with a fine profile shaped as interengaging teeth. Further, it is possible that the second part is followed by a third part (10) which again is provided with a more coarse profile (11,12).

Description: The invention relates to an apparatus suitable for dividing into separate parts an assembly removed from an entrails package of a slaughtered bird comprising heart and lungs, comprising two rotating axes extending substantially horizontally and mutually in parallel leaving there between free a slit, the axes being provided with surface profiles for pulling down intestines of the bird into the slit wherein a first part of the axes has a coarse profile shaped as helically extending ribs and a successive second part is provided with a fine profile shaped as interengaging teeth, so as to cause pulling down the lungs into the slit between the axes while simultaneously in a lying position moving forward the heart. Such an apparatus is known from the Dutch patent application NL-A-8502785. The known apparatus is intended for dividing stomachs from intestines of slaughtered poultry. After the entrails package has been removed from the inside of a slaughtered bird it has to be divided into parts, because these parts have separate destinations. Thus, the assembly comprising heart and lungs will be removed from the entrails package in common. Next, it is necessary that the heart and the lungs are separated from each other, because the heart has a destination different from the lungs which are considered as offal. It is an object of the invention to provide an apparatus wherein the dividing into separate parts of an assembly removed from an entrails package comprising heart and lungs occurs in a uniform and reproducible way, also at the high production rates applied at modern slaughtering lines. The apparatus according to the invention is characterized in that the profile of the first part of the axes comprises ribs extending in parallel with the centre line of the axes in addition to the ribs extending helically, wherein the ribs of the different axes do not engage each other. By means of the surface profiles at the first part of the axes the lungs, which are rather soft, are pulled down through the slit between the rotating axes. The hearts, which are rather firm, stay resting on top of the axis and cannot pass downwardly through the slit. Thus, the lungs will be torn free from the hearts and will be discharged at the lower side of the axes. The second part with a fine profile shaped as interengaging teeth following the first part of the axes aims, after the lungs have already been removed, at fully "peeling" the hearts, that means removing the tissues surrounding the heart. This fine profile in a way acts as a milling cutter, as the result of which the hearts are substantially clean after leaving said second part. The profile of the first part of the axes comprises ribs extending in parallel with the centre line of the axes and ribs extending helically, wherein the ribs of the different axes do not engage each other. The ribs extending in parallel with the centre line of the axes are mainly responsible for pulling down the lungs through the slit between the axes. Because these ribs do not engage each other, it is avoided that the lungs are fully crushed. The ribs extending helically have as main function moving forward the assembly, especially the hearts, along the axes. Of course, the shape, dimension and position of the different ribs will depend upon the nature of the entrails, especially the hearts and lungs. Dependent upon the breed and age of the birds, from which the assemblies comprising heart and lungs originate, one can choose differently shaped ribs, whereas also the distance between the axes may be varied. A special embodiment of the apparatus according to the invention is characterized in that the second part of the axes is followed by a third part which is provided with a profile having both ribs extending in parallel with the centre line of the axes and ribs extending helically. Generally, said third part is only needed when the separation between the lungs and the hearts has not been complete or when the hearts, after leaving the second part, are still suspended from parts of tissue which have to be removed. Using said third part those parts of tissue, or any remains of lungs, still can be removed. For separating the hearts and lungs in a controlled manner, it further is preferred, that a discharge channel for the lungs is provided below the axes. This discharge channel which generally extends along the entire length of the axes, collects lungs and material originating therefrom and discharges it towards a collecting location. At the end of the axes, the hearts are collected by means of another discharge channel and are removed towards a different location. Hereinafter, the invention will be elucidated referring to the only figure, in which schematically and in a top plan view an embodiment of the apparatus according to the invention has been illustrated. There have been shown two axes 1 and 2 positioned alongside each other and extending horizontally and in parallel with each other. Each axis comprises a first part 3 having such a diameter that a slit 4 is present between the axes. At the first part 3 of each axis 1, 2 a surface profile is provided comprising ribs 7 extending in parallel with the centre line 5, 6 of the axes 1, 2 and ribs 8 extending helically. The axes 1, 2 are driven in rotation in such a way that, as seen from above, the facing sides of the axes move downward. Thus, the helically extending ribs 8 will move an assembly comprising heart and lungs, which is positioned on top of the axes from the left to the right, as seen in the drawing. The first part 3 of the axes is followed by a second part 9. This second part 9 is provided with a fine profile shaped as interengaging teeth. Thus, at said second part there is no slit between the axes. Finally, in the illustrated embodiment, the second part 9 is followed by a third part 10. In correspondence with the first part 3 said third part 10 comprises straight ribs 11 and helically extending ribs 12. Finally, the figure shows that below the axes, extending along the entire length thereof, an only schematically indicated discharge channel 13 is positioned. The apparatus operates as follows: an assembly comprising heart and lungs (not illustrated) removed from a slaughtered bird is positioned on top of the rotating axes 1, 2 at the left hand side. Under influence of the engaging action of the ribs 7 (and possibly supported by the helically extending ribs 8) the lungs, which are of a softer nature than the heart, are put down through the slit 4. As a result of its more firm nature, the heart stays on top of the axes 1, 2. Thus, the lungs are torn loose from the heart. The lungs drop into the channel 13 and are removed. The heart is conveyed on top of the axes 1, 2 to the right by means of the helically extending ribs 8. Next, the heart reaches the second part 9 of both axes, at which part the interengaging teeth grip tissues surrounding the heart and tear these loose from the heart. At said second part 9, the heart in a way is "milled free". The helically extending teeth further take care of conveying the heart to the right, also at said second part 9. Finally, the heart reaches the third part 10 of the axes. At this third part, possible remains of lungs or other parts of tissue may be engaged by the ribs 11 and possible the ribs 12 and be pulled down through the slit which is again provided between these axes. These parts of the assembly are also removed by means of the discharge channel 13. The hearts finally reach the extreme right end of the axes 1, 2 and drop into another discharge channel not represented, which conveys the hearts towards an appropriate location. The invention is not limited to the embodiment described which can be varied widely within the scope of the invention as defined by the claims.

Claims: Apparatus suitable for dividing into separate parts an assembly removed from an entrails package of a slaughtered bird comprising heart and lungs, comprising two rotating axes (1, 2) extending substantially horizontally and mutually in parallel leaving there between free a slit (4), the axes (1, 2) being provided with surface profiles (7, 8) for pulling down intestines of the bird into the slit (4) wherein a first part of the axes (1, 2) has a coarse profile (7, 8) shaped as helically extending ribs (8) and a successive second part is provided with a fine profile (9) shaped as interengaging teeth, so as to cause pulling down the lungs into the slit (4) between the axes (1, 2) while simultaneously in a lying position moving forward the heart, characterized in that the profile of the first part of the axes comprises ribs extending in parallel with the centre line of the axes in addition to the ribs extending helically, wherein the ribs of the different axes do not engage each other. Apparatus according to claim 1, characterized in that the second part of the axes is followed by a third part which is provided with a profile having both ribs extending in parallel with the centre line of the axes and ribs extending helically. Apparatus according to claims 1 or 2, characterized in that a discharge channel (13) for the lungs is provided below the axes (1, 2).

Inventors: DE WEERD HANS, DE WEERD, HANS
Applicants: MACHF MEYN B V, MACHINEFABRIEK MEYN B.V.
Application year: 1996
Main classification: A22C17
IPC codes: A22C17