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
  • C14B1/58—Drying
• • 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
  • C14B1/44—Mechanical treatment of leather surfaces
  • C14B1/52—Brushing or plush-wheeling
• • 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
  • C14B17/06—Work feeding or clamping devices
  • C14B17/08—Fastening devices, e.g. clips for leather-stretching

Definitions

• the present invention relates to a method for the mechanical execution of water-brushing of taned pelts, chiefly mink pelts, on a distension element/pelt board with a first and a second broad side surface preferably with a convex and open surface structure, a nose end and a foot end, where the pelt board is fastened at the foot end, preferably in the upright position, and where said pelt is secured in the stretched position on the pelt board by a wrapping or a tubular holding bag comprising a narrowed-down holding area, the lower limit of which is placed on a level with the tail root of the pelt, and where the holding bag comprises a slotted part oriented towards the pointed end of the board.
• the method for the water-brushing of pelts also finds application in cases where the pelts are taned on an expandable and col- lapsible distension element/pelt board, a so-called expansion pelt board, with a first and a second broad side surface with a convex and open surface structure, a nose end and a foot end, and a locking/distension element which, from the foot end of the board and oriented in the longitudinal direction of the board, comprises a projecting blunt part in which the expansion board is secured preferably in the upright position, and where said mink pelt is secured in the stretched position on the pelt board by means of a tubular holding bag comprising a narrowed-down holding area, the lower limit of which is placed on a level with the tail root of the pelt, and where the holding bag comprises a slotted part oriented towards the pointed end of the board.
• the invention also relates to a machine for the execution of the method according to the invention.
• the drying of the leather side of pelts from furred animals is well-known, where the drying takes place after the pelt has been stretched and secured with staples on a flattish board of wood, a pelt board, with the object of keeping the pelt as large as possible.
• the use of staples results in damages to the pelt in the form of large holes in the lower end of the pelt, which reduces the value of the pelt.
• the use of the known pelt boards entails a number of disadvantages, of which can be mentioned the lack of drying of the pelt in certain areas where the leather side lies tightly up against the surface of the pelt board, long drying times and a troublesome taning procedure.
• a distension element as disclosed in WO 2005/026394 A1 , where the pelt is mounted and stretched over a hollow distension element which comprises a first and a second broad side surface of mutually connected, cooperating convex half- parts with an open structure, the one end of which (the foot end) is cut off at right- angles in relation to the longitudinal axis of the distension element/pelt board, and the breadth of which gradually decreases towards a pointed but rounded-off end part (the nose end), the surface of which, at least in the drying area but preferably over the whole surface, has an open structure, with the leather side facing towards the distension element, and where the pelt is secured in this position during the drying procedure by the drawing-over of a holding bag in accordance with the principles disclosed in WO 01/62985 A1 , which at least over a part of the lower end (the tail end) presses the pelt against the surface of the distension element/pelt board, and
• the pelt is effectively secured in the stretched position during the drying procedure by an interaction between the surfaces of the convex half-parts with the open structure and a narrowed-down area of the tubular holding bag which is drawn over the fur side of the pelt, at least over a part of the lower end (the tail end) of the pelt, where the narrowed-down area presses the leather side of the pelt against the open structure of the distension element, whereby the leather side of the pelt is secured in its stretched position during the drying procedure.
• the possibility is hereby achieved for effective drying of the leather side of the pelt, and also that the pelt can effectively be secured during the drying procedure without the use of staples which damage the pelt, in that the pelt is secured in its stretched position by means of a holding bag.
• the use of the holding bag also has the advantage that the pelt becomes easier to remove from the distension element after conclusion of the drying procedure, inasmuch as there are no staples to be removed before the pelt can be separated from the board, and also that the drying time is considerably reduced with the method according to the invention.
• a pelt dried following the method in accordance with the invention is dried in a more uniform manner, without black spots under which the leather can turn mouldy, which can result in the loss of hair from the fur side of the pelt.
• the drying of the leather side of a taned pelt takes place by exchanging the air in the cavity of the distension element/pelt board.
• a method for carrying out this change of air is disclosed in WO 2005/026394 A1 , where the pelt boards with the taned pelts are placed in an upright position in a drying aggregate provided with a blower/suction unit which effects the changing of the air in the cavity of the pelt board.
• the drying aggregate(s) with a plurality of pelt boards are placed in a drying room in which the humidity and the temperature of the air are conditioned, so that an effective and uniform drying of the leather sides of the pelts is achieved.
• the implementation of water-brushing before the drying of a taned pelt takes place will be conditional upon whether a pelt bag has been used in the taning of the pelt, where the bag covers as small an area of the fur side of the pelt, with due consideration to the extent of the holding bag's narrowed- down area, to achieve the necessary holding power for securing the pelt stretched on the pelt board.
• the holding bag shall have a certain length in order for it to be possible to carry out a mechanical placing of the holding bag during the taning procedure.
• the slot serves to make it possible in an easy manner to carry out a folding/drawing back and down of the slotted area of the bag over the narrowed-down area of the bag, all the way to the transition between this and the slotted area of the holding bag.
• a taned pelt on a pelt board fastened at the foot end in upright position standing on the foot end is displaced to a processing area opposite a water-brushing machine, and the upright pelt board is positioned so that the position of the pelt board is well-defined for a control unit associated with the water-brushing machine.
• the method can be executed just as well with a horizontal ori- entation of the longitudinal axis of the pelt board, but for the sake of simplicity the method is disclosed in the claim with the pelt board in the upright position, fastened at the foot end.
• the method comprises a possible repetition of the process steps b, d, e, f, but not c, which consists of the application of liquid/water to the fur side of the pelt, for the reason that a concluding sweeping of the pelt without a supply of liquid/water can be expedient in order to ensure an optimal im- plementation of the brushing, so that the pelt has an optimum appearance.
• the water-absorbing sweeping blocks absorb possible excess liquid/water from the fur side of the pelt.
• the first leading down of the processing stations will result in the slotted part of the holding bag being pushed together, so that the surface of this is "curled", with the result that the second leading down of the processing stations and the displaceable, projecting elements will hereby easier be able to grip the slotted part of the tubular holding bag along the edge of the first and second side of the expansion pelt board, whereby the folding-back and down can safely be implemented respectively by influence of the sweeping blocks and the displaceable projecting elements with non-skid coating on the sides facing the holding bag.
• a machine for the execution of the method according to the invention can with advantage comprise an upright bracket with a column with a front side oriented towards a processing area, and a rear side, and a first side and a second side, a substantially vertically-oriented guide rail for the guiding of a carriage displaceable by a first actuator in the direction of the guide rail, on which carriage there is housed a brush aggregate comprising two similar, laterally reversed processing stations which are mutually and relatively displaceable by a second actuator, each of said processing stations at the bottom comprising sweeping blocks consisting of elastically yielding water-absorbing material, above which there are a number of atomising nozzles connected to a supply of liquid/water via a pump, and above said atomising nozzles there are a number of brushes, the shape of which is adapted to the cross-sectional geometry of the pelt board with the taned pelt, and elements projecting from the processing stations which by a third actuator are displaceable from a passive position to an active position in contact against
• the brushes can also be suspended in spring-loaded arms, which ensure a uniform pressure of the brushes against the fur side of the pelt, so that the mechanical influence on the pelt's fur is uniform in the implementation of the water- brushing.
• the brushes can with advantage consist of linear brushes of horsehair oriented transversely to the longitudinal axis of the pelt board.
• the non-skid coating on the projecting elements can consist of rubber.
• Fig. 1 is a schematic principle drawing of a first embodiment of an automatic water-brushing machine according to the invention for water-brushing of taned pelts on upright-standing expansion pelt boards.
• Fig. 2 is a front view if a second embodiment of an automatic water-brushing machine according to the invention with a pelt board inserted during water- brushing.
• Fig. 3 is a side view of the embodiment of an automatic water-brushing ma- chine shown in fig. 2, and
• Fig. 4 is a detail picture of the brushing aggregate on the embodiment of an automatic water-brushing machine according to the invention shown in fig. 2 and 3.
• Fig. 1 shows in very rough schematic form a first embodiment of a water- brushing machine 2 according to the invention seen from the side. It shows a pelt 4 with a taned pelt 6 fastened in the upright position by not-shown means at the foot end 7, and where the pelt 6 is secured in the stretched position by a tubular holding bag 8 with a part 12 oriented towards the pointed end 10 of the pelt board, said holding bag 8 comprising slots 14 which are attempted to be shown in fig. 1.
• the narrowed-down area 16 of the holding bag is placed at the tail root 13 of the pelt.
• the water-brushing machine shown in fig. 1 comprises a brush aggregate 18 comprising two similar, laterally reversed processing stations 20, 22 which are mutually and relatively displaceable transversely to the longitudinal axis 5 of the pelt board by a second actuator 62 (cf. fig. 2 and fig. 3), each of said processing stations 20, 22, on the side facing towards the pelt board 4 with the pelt 6, comprising sweeping blocks 24 consisting of elastically yielding water-absorbing material. Above the sweeping blocks 24 there are a number of atomising nozzles 26 connected to a supply 28 of liquid/water via a pressure pipe 33 and a pump 32.
• the atomising nozzles 26 there are a number of linear, curved horsehair brushes 30, the shape of which is adapted to suit the cross-sectional geometry of the pelt board 4 with the taned pelt 6.
• the horsehair brushes 30 are mounted on arms 31 which are spring-loaded in the direction of the processing area 46 between the processing stations 20, 22.
• the linear brushes 30 are oriented transversely to the longitudinal axis 5 of the pelt board, and have an extent which at least corresponds to the breadth of the pelt board 4 with the taned pelt 6.
• Each of the processing stations 20, 22 also comprises a laterally displaceable projecting element 34, which by a third actuator 36 (cf. fig. 2 and fig.4) is displaceable from a passive position to an active position in contact against the taned pelt/holding bag 8 along the edge 38 of the first and the second broad side surface 40, 42, and the sides of the elements 34 facing towards the holding bag are provided with a non-skid coating 44 which with advantage can consist of rubber.
• the brush aggregate 18 is mounted in a manner in which it can be displaced vertically by the second actuator for leading the processing stations 20, 22 down to the processing position in the processing area 46.
• the shown pelt board 4 can, for example, consist of an expansion pelt board as discussed earlier, with an open, convex surface structure on the first and the second side surfaces 40, 42.
• a machine 2 for the execution of water-brushing of taned pelts 6, chiefly mink pelts, on a distension element/pelt board 4, namely an expandable and collapsible distension element/pelt board, a so-called expansion pelt board, with a first and a second broad side surface 40, 42 with a convex and open surface structure, a nose end 10 and a foot end 7, and a locking/distension element 9 which, from the foot end and oriented in the longitudinal direction of the board, comprises a blunt projecting part 11 in which the expansion board is fastened in the upright position, and said mink pelt 6 is secured in the stretched position on the board 4 by a tubular holding bag 8 comprising a narrowed-down area 16, the lower limit of which is placed on a level with the pelt's tail root 13, and a slotted part 12 oriented towards the pointed end 10 of the pelt board.
• a tubular holding bag 8 comprising a narrowed-down
• the water-brushing machine 2 comprises a bracket 102 with a column 52 with a front side oriented towards the processing area 46, a substantially vertical guide rail 54 for the guiding of a carriage 58 which is displaceable by a first actuator 56 in the direction of the guide rail, and on said carriage 58 a brush aggregate 18 comprising the two similar, laterally reversed processing stations 20, 22, which are mutually displaceable by a second actuator 62 (cf. fig. 3)
• the nozzles 26 for the supply of water are integrated in the sweeping blocks 24, which is seen more clearly in fig. 4, where the sweeping blocks 24 are shown transparent.
• the linear brushes are not shown on the spring-loaded arms 31.
• the nozzles 26 are connected by a pipe 33 to a not- shown pump connected to a not-shown supply of water.
• the water-brushing machine further comprises a control unit 64.
• the machine's control unit 64 can be arranged in such a manner that it carries out the brushing with implementation of two consecutive leading- down operations of the brush aggregate 18, the first during the supply of liq- uid/water via the nozzles 26, and the second without a supply of water, hereby achieving an absorption of possible excess liquid/water from the fur side 50 of the pelt by means of the sweeping blocks 24, and an extra processing of the pelt with the brushes 30.
• the machine will comprise the detection units necessary for the control of the mechanical operations, for example the localising of a pelt board in the processing area, the actual position of the carriage on the vertically-oriented guide rail and the placing of the holding bag on the pelt board, and which via interface are all connected to the machine's control and regulation unit, whose storage unit comprises a control programme which, on the basis of signals received from the detection units, implement the sequential control of the machine's operations.
• the detection units necessary for the control of the mechanical operations for example the localising of a pelt board in the processing area, the actual position of the carriage on the vertically-oriented guide rail and the placing of the holding bag on the pelt board, and which via interface are all connected to the machine's control and regulation unit, whose storage unit comprises a control programme which, on the basis of signals received from the detection units, implement the sequential control of the machine's operations.
• the said detection units and control unit are not shown, but this does not detract from the inventive aspect, which consists of the disclosure of a method and a machine for the implementation of an automatic execution of water-brushing of pelts on upright-standing pelt boards, preferably expansion pelt boards of the kind disclosed.
• a starting point is taken in upright pelt boards which are fastened at the foot end in a blunt part 11 extending from said foot end.

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• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
• Treatment Of Fiber Materials (AREA)

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Cited By (8)

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Citations (4)

• 2006
  • 2006-08-26 DK DK200601111A patent/DK176421B1/da not_active IP Right Cessation
• 2007
  • 2007-08-27 WO PCT/DK2007/050120 patent/WO2008025364A1/en active Application Filing

Patent Citations (4)

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