Butchering – Deboning – Pressure type
Patent
1999-11-18
2000-10-17
Little, Willis
Butchering
Deboning
Pressure type
A22C 1704
Patent
active
061323047
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an apparatus for separating meat from bones comprising eat remainders, comprising: a cylinder with a cylinder wall; a piston movable into the cylinder; cylinder; a plurality of holes arranged in the cylinder wall for passage of meat out of the cylinder placed under pressure; outfeed means for discharging bones from the cylinder; and a drive device for driving the piston.
Such an apparatus is generally known.
In the use of such prior art apparatus the aim is total removal of bone particles from the meat mass. For this purpose small holes and therefore necessarily high pressures are applied.
The invention provides an apparatus wherein the smallest passage of the holes lies between 3 mm and 12 mm and wherein the rive device is adapted to apply a pressure in the cylinder with a magnitude of between 30 bar and 120 bar.
The invention is based on the insight that the total remove of bone particles from the meat mass is not optimal for every application, partly because this may have an adverse effect on the structure of the meat.
By applying larger hole restrictions the required pressure can be reduced.
While the quantity of bone material in the meat mass increases as a result, on the other hand the structure of the meat is largely preserved, this in contrast to the prior art, wherein the structure is for the most part lost due to the high pressure. In addition, the amount of marrow in the meat mass decreases considerably. Due to the improved structure relative to the prior art and the decreased amount of marrow in the meat mass obtained with the invention, this meat mass is more suitable for further processing, such as a second filtration step which has no further adverse effect on the structure of the meat but which does cause a decrease in the amount of bone, or other process wherein the bone particles are reduced to an acceptable size or quantity.
A great advantage of the apparatus according to the invention is that the meat is suitable for new applications such as processing to minced meat or sausage.
Owing to the lower pressures the apparatus can moreover be dimensioned more simply, which reduces the cost price thereof.
Furthermore, due to the comparatively low pressure, the bone structure still remains sufficiently open to also allow meat in the middle of the cylinder the space to move to the outside of the cylinder, which was not always the case in prior art apparatus; owing to the high pressures the structure particularly of portions of the bone mass adjacently of the cylinder wall became so dense that it became impassable for the meat mass.
Another advantage lies in the fact that as a consequence of the comparatively low pressure the temperature during the process hardly increases, which is extremely important for reasons of hygiene.
It is pointed out herein that the outfeed means may take any random form, even that of a separate tool or that of the piston which ejects the bone remnants from the cylinder.
The minimum passage of the outfeed channels preferably amounts to between 6 mm and 10 mm and according to a particularly attractive preferred embodiment this passage is 8 mm.
According to another preferred embodiment the drive device is adapted to cause the piston to move at a speed of at least 20 mm/s during the pressure increase.
According to yet another preferred embodiment the drive device is adapted to build up the maximum pressure within 4 s.
According to a particularly attractive embodiment the drive device is adapted after developing the required pressure to maintain this pressure for a maximum of 1 s before decreasing the pressure, or, according to another embodiment the drive device is adapted after developing the required pressure to decrease the pressure immediately.
All these steps result in a process such that the marrow content in the meat mass is reduced. This results in an improved quality.
According to yet another preferred embodiment the outfeed channels are widened in the flow direction toward the smallest passage. This means that only a single restriction is
REFERENCES:
patent: 1631037 (1927-05-01), Kochenderfer
patent: 4025985 (1977-05-01), Settle
patent: 4538324 (1985-09-01), Prosenbauer
patent: 5667435 (1997-09-01), Baughman et al.
SU 1 292 698 A (Odess Pressmash), Feb. 28, 1987 (Derwent Pub. XP002043721).
Aarts Lambertus Maria
van der Lenden Johanes Jozef
Little Willis
Stork MPS B.V.
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