Classifications

• • C—CHEMISTRY; METALLURGY
  • C14—SKINS; HIDES; PELTS; LEATHER
  • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
  • C14B1/00—Manufacture of leather; Machines or devices therefor
  • C14B1/02—Fleshing, unhairing, samming, stretching-out, setting-out, shaving, splitting, or skiving skins, hides, or leather
  • C14B1/04—Fleshing, unhairing, samming, stretching-out, setting-out, shaving, splitting, or skiving skins, hides, or leather using slicking, scraping, or smoothing-out cylinders or blades fixed on supports, e.g. cylinders, in a plane substantially at right angles to the working surface
  • C14B1/10—Fleshing, unhairing, samming, stretching-out, setting-out, shaving, splitting, or skiving skins, hides, or leather using slicking, scraping, or smoothing-out cylinders or blades fixed on supports, e.g. cylinders, in a plane substantially at right angles to the working surface in machines with drums with cylindrical, conical, or similar surfaces for supporting the whole working piece
• • C—CHEMISTRY; METALLURGY
  • C14—SKINS; HIDES; PELTS; LEATHER
  • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
  • C14B17/00—Details of apparatus or machines for manufacturing or treating skins, hides, leather, or furs

Definitions

• the present invention relates to an apparatus for scraping off the layer of fat from fur pelts such as mink and foxes' pelts immediately upon pelting the ani ⁇ mals and comprising at least one driven pole over which the pelts are pulled, the flesh side facing outwardly, and are retained tautly by hooks at the hind shanks at the thicker end of the pole as well as a scraper unit being axial parallel displaceable along the pole having a scraper which may be brought into engagement with the flesh side of the pelt for scraping off the layer of fat.
• DK-PS 152 847 is one such example.
• the object of the present invention has been to find a solution to these obstacles in the prior art constructions.
• This task is solved by a construction which is characteristic in being designed such that the rotating direction of the pole is reversible during the return of the scraping unit and that the scraper during this engages the pelt. Consequently a scraping of the pelt is obtained in both the forward and return move ⁇ ments of the scraping unit.
• it is equally im ⁇ portant that a better scraping can be achieved as the pelt first is scraped in one direction and then in the reverse direction. It is especially effective for the areas around the foreshanks and the hind part of the body, where those portions that cannot be worked at the forward movement of the scraper can be reached during the return movement.
• the direction of rotation may be changed by a gear or by turning the direction of rota ⁇ tion of the drive motor.
• the synchronizing and the turning of direction of rotation can appropriately be performed by moving the scraping unit along a worm bar placed axial parallel to the pole and via a gear it is pulled by the same drive motor that rotates the pole.
• a fast and convenient installation and removal of the pelts can be obtained by a construction where the pole is suspended by the thicker end about the drive shaft, and that a shaft end protrudes from the thinner end of the shaft and which can be retained in a bearing bush which can be brought to engaging and disengaging the shaft end.
• compressed air is always available at pelting plants an operationally simple change is ob- tained by applying an pneumatic cylinder and place t._ ⁇ e bearing bush at the piston rod of the cylinder such that the bearing is pushed out of and into engagement with the shaft end of the pole by activating the compressed- air cylinder.
• a through-going shaft in the pole is usually preferred, but a short shaft end might just as well be placed at or in the thinner end of the pole.
• the pelt is retained tautly on the pole in the lon ⁇ gitudinal direction by hooks which by a cord drive are spring-loaded by springs situated inside the pole.
• the hooks are provided with operating levers and by giving these a physical size such that they can actuate an inductive sensor being matched thereto, the levers may be used to reversing tht apparatus to its return move ⁇ ment to the initial position.
• the hooks that are grip ⁇ ping the hind legs of the pelt are always situated near the edge of the pelt and are consequently well-suited indicators for the reversing.
• the invention provides a user-oriented scraping apparatus of large capacity and performing a more effi ⁇ cient stripping of the pelts than the prior art con ⁇ structions do and without significantly increasing the cost of production.
• Fig. 1 is a direct frontal view of the apparatus, i.e. the side from which the operator operates the ap ⁇ paratus,
• Fig. 2 is a direct lateral view of the apparatus as seen from the left end in relation to Fig. 1,
• Fig. 3 is a direct top view of the apparatus
• Fig. 4 is a direct top view of the pole arrangement of the apparatus.
• the scraping apparatus consists in the main of a supporting frame 2 in which a pole arrangement 4 and a scraping unit 6 are resting, and a control box 8 is mounted to the frame.
• the pole arrangement comprises two conical poles 10 being embedded and retained in a traverse 12, this again being attached to a longitudinal pivot shaft 14 placed on the symmetry line between the two poles and with the ends resting in the frame such that the poles can be turned between a scraping position where the pelts are scraped, and an attaching position, where the pelts can be pulled onto the poles. Alteration between the two positions is carried out by turning of the pole ar ⁇ rangement by lever 16 being situated in the extension of the traverse.
• the pole In the attaching position the pole lies outside the limits of the frame and is freely protruding such that the pelt may conveniently be pulled up the pole.
• the pelt is retained at the hind shanks by two hooks 28 connected to a cord 29 entering the hollow pole where the cord is loaded by a spring 30. From the handle 31 the cord runs round a spool into and down through the pole, round the spring and up again where by a fastener it is fastened to the centre shaft of the pole.
• the hook In its inactive position the hook sits in a parking hoop 32. In order to prevent inadvertently touching of the other pole being in its scraping position, they are kept sepa ⁇ rated by a longitudinal central shield 34 fastened to the pivot shaft.
• the scraping unit 6 comprises a supporting bracket 36 which by slide bearings 38 is carried on a longitudi ⁇ nal slide rod 40 mounted in the frame. At the top the bracket is guided by two pairs of upwardly protruding eccentric axle journals 42 on a longitudinal bearer 43 in the frame. At the supporting bracket a tiltable bracket 44 is journalled at which an electric motor 45 is suspended directly at the shaft end of which the scraping knife 46 is mounted. The scraping knife is enclosed inside a funnel mounted to the motor and with an opening for the knife towards the pole and a funnel opening for ejection of the removed fat. By a pneumatic cylinder 49 the scraping knife can be brought into and out of contact with the pelt as the tiltable bracket as a unit swings towards or away from the pole.
• a sawdust bin 50 is attached, the latter having a portion ⁇ ing device at its bottom for sprinkling the pelt with sawdust.
• a tray 51 is placed in the frame below the pole in its scraping position.
• the scraper unit can be displaced along the pole by a worm 52 placed in the frame and parallel to the slide bar and cooperating with a nut 54 at the carrier bracket.
• the worm is driven via a belt drive 56 by the same gear motor that pulls the pole.
• the belt pulley 59 and the sprocket that pulls the pole are both mounted at the motor shaft.
• the pole ar ⁇ rangement is locked against turning by means of two pneumatic cylinders 60 (the drawing shows only one) becoming activated such that the piston ends engage two corresponding holes at a disc 62 mounted at the end of the pivot shaft.
• the scraping motor as well as the gear motor are started and the scraper is swung into engagement with the pelt by means of the tilting cylin ⁇ der.
• the scraper unit is now displaced along the pole towards its thicker end during scraping off the layer of fat from the pelt, until the inductive sensor is acti ⁇ vated by the hook levers.
• the gear motor stops and the directions of rotation of the pole and the worm are turned such that the scraper unit reverses and the pole runs reversely.

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• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Machines For Laying And Maintaining Railways (AREA)
• Cleaning In General (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8108878

Family Applications (1)

Country Status (2)

Cited By (9)

Citations (3)

• 1990
  • 1990-08-09 DK DK189490A patent/DK173202B1/da not_active IP Right Cessation
• 1991
  • 1991-08-09 WO PCT/DK1991/000224 patent/WO1992002643A1/en unknown

Patent Citations (3)

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