Butchering – Skinning – Gripper or hook type
Patent
1998-11-20
1999-12-07
Little, Willis
Butchering
Skinning
Gripper or hook type
452177, A22B 508
Patent
active
059973935
DESCRIPTION:
BRIEF SUMMARY
The invention is related to a device for separating animal skins, such as cow or horse skins, and for transferring them through a conveying passage, by using pressure difference, to further processing and, particularly, to a device that comprises a pulling device for separating the skin from the carcass of the animal and for feeding it to the forward end of the conveying passage, and means for generating pressure difference between the ends of the conveying passage and for separating the conveyed skin from the conveying air.
The term "skin", in this context, refers to the skin of an animal such as a cow, horse or the like that is stripped in a slaughterhouse. The term "stripped" refers to the stripping of the skin from the carcass of the animal in question.
Existing slaughterhouses are designed to comprise two storeys and the treatment of skins generally takes place downstairs beside the skin-pulling device. In such a storey solution the skin is directly dropped downstairs from the roll of the skin pulling device, away from the premises of the slaughterhouse. However, the trend today is to build advantageous one-storey slaughterhouses, whereby it is not possible to utilise gravity in transferring skins downstairs and, therefore, dirty skins have to be conveyed from the slaughterhouse to the skin department.
The transportation of skins sets limitations on the lay-out planning since it is generally not possible to locate the skin department beside the position of skin separation because of other operational starting points. The transportation of skins by long and inconvenient conveyors is not only insanitary and expensive but also requires maintenance. furthermore, the conveyors impede passenger traffic.
The gear for skin transporation known from before includes different conveyors such as belt or slat conveyors and the blowing by overpressure along a tabe (pneumatic cannon). It is difficult to automate the equipment for transportation by pneumatic cannon; it requires the building of a hole over 2 metres deep in the floor so that the skin can be lowered directly from the roll of the pulling device to the transmit arrangement of the funnel-like cannon. The above-mentioned hole structure is insantary and difficult to implement technically, particularly in the existing slaughterhouses. The pneumatic cannon placed on the floor requires at least one worker to precondition the skin for transportation. In the preconditioning, the skin is folded into an elongated fold so that it is easy to push to the elongated funnel tube of the cannon transmit arrangement and it slides well in transit tube without causing blockage.
All these transfer methods and equipment are very expensive and impractical.
The disadvantages of the above-mentioned devices are now eliminated by transferring skins in a channel by using pressure difference, ie., by suction conveyance mainly as defined in the appended claims. In the solution according to the invention, the transfer of skins is automated so that it does not require manpower. The transfer by underpressure (vacuum) is a closed transfer system, hygienic and flexible. Consequently, the location of further processing can be selected according to other productional requirements.
The device according to the invention for separating animal skins and transferring them through a conveyance channel to further processing can be used to apply suction conveyance because the pulling device that engages the other end of the skin comprises means for dropping or lowering the skin, with its opposite end in front, to a feed hopper at the forward end of the conveyance channel, and means for separating the skin from the pulling device for the said suction conveyance. The feeding and separating means are preferably located above the feed hopper, whereby smaller and lighter skins can be dropped to the feed hopper whereas larger and heavier skins are gradually lowered, with the opposite end in front, to the feed hopper, in a controlled manner, before the other end is detached from said means.
In a preferred em
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Ins. tsto Tornberg Oy
Little Willis
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