Butchering – Sausage making – Peeling
Patent
1997-06-03
1999-07-27
Little, Willis
Butchering
Sausage making
Peeling
A22C 1300
Patent
active
059280735
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a method of removing the skin casing from a sausage and comprises the steps that the sausage is slit in its one end region, that the skin casing of the sausage is gripped by a gripping device, that the gripping device and the sausage undergo a relative displacement in the longitudinal direction of the sausage, and that the sausage, at least during a part of the removal operation of the skin casing, is caused to rotate approximately about its longitudinal axis.
The present invention also relates to an apparatus for removing the skin casing from a sausage.
BACKGROUND ART
U.S. Pat. No. 4,637,095 discloses an apparatus for removing the skin casing from a sausage. This apparatus comprises two pairs of crosswise disposed drive or advancement rollers for the sausage which are intended to simultaneously longitudinally displace the sausage and rotate it about its longitudinal axis. The apparatus further includes a knife which is intended to produce a longitudinal incision in the one end region of the sausage. In addition, the apparatus disclosed in this US patent specification includes means with gripping rollers which are intended to grip a portion of the skin casing projecting from the end of the sausage and pull the skin casing from the sausage when this is advanced over the gripping rollers under rotation.
In such situations when the sausage has an excess portion of skin casing extending in the axial direction, the apparatus disclosed in the above US publication might possibly function. On the other hand, operational disturbances will most likely occur in such cases when the sausage skin casing has a metal retainer ring about the end portion of the sausage skin casing or if this end portion is so large that no grip can be achieved.
PROBLEM STRUCTURE
The present invention has for its object to devise a method intimated by way of introduction such that it may, with a high degree of operational reliability and rapidity, be employed for removing the skin casing from a sausage irrespective of the appearance of the end region of the sausage and irrespective of whether metal parts or the like are provided there. Further, the present invention has for its object to devise a method such that a high level of operational reliability may be achieved also in cases employing sausage skin casings of poor mechanical strength and hard adhesion to the sausage proper.
The present invention yet further has for its object to provide an apparatus for removing the skin casing from a sausage. Thus, the invention relates to such an apparatus which is easy to manage and is extremely reliable in operation, which is flexible and which, as a result, may readily be adapted to different types and sizes of sausages irrespective of the appearance of the skin casing at the ends of the sausage and largely irrespective of the mechanical strength of the skin casing and its adhesion to the sausage proper.
SOLUTION
The objects forming the basis of the present invention will be attained in respect of the method, where the method is characterized in that a flap of the skin casing is gripped in association with the slit, and that the gripped flap of skin casing is displaced in relation to the sausage in a direction transversely of the longitudinal direction of the sausage, preferably approximately tangential.
The objects forming the basis of the present invention will be attained in respect of the apparatus, where the apparatus is characterized by a support arrangement for the sausage; a rotation unit which, by engagement with the sausage, is operative to rotate the sausage on the support arrangement approximately about its longitudinal axis; a gripping unit which has a knife for producing a slit in the one end region of the sausage, and at least one first gripper for gripping a flap of the skin casing in association with the slit; and guide means along which the rotation unit and the gripping unit are movable in opposite directions approximately parallel to the longitudinal direction of the sa
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patent: 4637095 (1987-01-01), Maruska
patent: 4682387 (1987-07-01), Leining
Andersson Ulf
B.ang.rden Lars
Rosengren Anders
Little Willis
Peeler System AB
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