Butchering – Tenderizers – Coacting rolls
Patent
1990-12-19
1992-05-19
Little, Willis
Butchering
Tenderizers
Coacting rolls
A22C 500
Patent
active
051143798
DESCRIPTION:
BRIEF SUMMARY
The invention refers to an apparatus for treating meat by applying pressure to the meat by means of at least two pairs of rollers disposed spaced apart from each other and being driven for rotation, which rollers are provided on their circumference with protrusions pressing into the meat passing the rollers, wherein the two rollers of each pair are driven with opposite sense of rotation and transport the meat in the gap between these two rollers from up to down and the sense of rotation of the two rollers of each pair is in transport direction of the meat, and wherein the rollers of at least one roller pair are driven with different peripheral speed and the width of the gap between the rollers of the roller pairs is adjustable.
Apparatus for treating the meat by applying pressure are known in numerous constructions. For example it has become known from the U.S. Pat. No. 4,348,747 to transport the meat lying on a conveyor belt under two rollers disposed side by side and being spaced apart from each other and being driven for rotation in the same direction, which rollers are provided with blunt pyramidal protrusions. In the region of these rollers the conveyor band carrying the meat is abutted from below by resilient plates. Such an apparatus has the drawback of a high wear of the conveyor belt because the pressure of the rollers is almost completely transferred to the conveyor belt or to its resilient abuttment, respectively. Further, a high effort is necessary for the drive means because not only the rollers for themselves but also the conveyor belt must be driven.
An apparatus of the initially described kind is known from the DE-A 3,344,284. In that, the adjustment of the gap between the rollers is done by bearingly supporting the one roller on a swivel arm which by means of a pneumatic cylinder is movable towards the other stationarily beared roller or away from it. This causes difficulties when cleaning the rollers and, if more than roller pair is provided, a change of the roller gap is not possible in a sufficient versatile manner.
The invention has at its object to improve an apparatus of the last named kind so that a versatile adaptation of the roller gap to different meat qualities or, respectively, meat thicknesses is possible without render difficult the cleaning of the rollers. The invention solves this task in that always one roller of each roller pair is bearingly supported in a box which is parallely shiftable to a further box in which in each case the other roller of each roller pair is bearingly supported, each box having an own motor for driving its rollers, and that the two boxes additionally are swivellable relative to each other. Thereby it is possible to adapt the pressure applied by the rollers to the meat and the pulling or, respectively, stretching effect applied to the meat pieces by the protrusions of the rollers in connection with the different peripheral speed of the two rollers of at least one roller pair to different qualities of meat or, respectively, meat thicknesses. The possibility to swivel the one box relatively to the other box makes the rollers easily accessible for cleaning and replacement purposes and can-if desired-also serve for adjustment of the form of the gap. Provision of an own motor for the rollers of each box saves a change of the drive means of the rollers related to each box, if the two boxes are shifted relatively to each other in order to amend the size of the roller gap.
From the U.S. Pat. No. 2,243,492 it has indeed become known for an apparatus having two roller pairs disposed one above the other, to bearingly support the two rollers of each pair in an own box, the one box being swivellable away from the other box in order to facilitate cleaning of the rollers. However, a change of the width of the gap between the two rollers of each pair is not possible because the two rollers of each pair are coupled by means of pinions in order to introduce the rotational movement from a common driving means, which pinion coupling is loosened when swivelling the one
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Little Willis
VanOphem Remy J.
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