EP0881303A2 - Dryer for tanned hides - Google Patents

Dryer for tanned hides Download PDF

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Publication number
EP0881303A2
EP0881303A2 EP98109064A EP98109064A EP0881303A2 EP 0881303 A2 EP0881303 A2 EP 0881303A2 EP 98109064 A EP98109064 A EP 98109064A EP 98109064 A EP98109064 A EP 98109064A EP 0881303 A2 EP0881303 A2 EP 0881303A2
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EP
European Patent Office
Prior art keywords
dryer
cyclone
discharge
vacuum
vapor
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Granted
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EP98109064A
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German (de)
French (fr)
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EP0881303A3 (en
EP0881303B1 (en
Inventor
Gianni Dal Lago
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Escomar Italia Srl
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Escomar Italia Srl
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Publication of EP0881303A3 publication Critical patent/EP0881303A3/en
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Publication of EP0881303B1 publication Critical patent/EP0881303B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
    • F26B5/045—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum for drying thin, flat articles in a batch operation, e.g. leather, rugs, gels
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/005—Treatment of dryer exhaust gases
    • F26B25/006—Separating volatiles, e.g. recovering solvents from dryer exhaust gases

Definitions

  • the present invention relates to a dryer for skins tanned according to the preamble of claim 1.
  • this secondary compressor installation volumetric and cooling unit presents significant costs and, moreover, which even more important, requires very high electrical energy consumption, likely to discourage many potential buyers for cost reasons production.
  • a normal installation with a liquid ring vacuum pump can effect consuming more than 20 kW / h, while with the addition of the secondary device, the refrigeration system consumes more than 100 kW / h.
  • the object of the present invention is to remedy the aforementioned drawbacks. This is carried out in accordance with the characteristics of the characterizing part of the Claim 1. Other advantageous embodiments are the subject of the subclaims.
  • a dryer is produced which creates the vacuum by means of one or more several oil-layer vane pumps, to be mounted on skin dryers multiple shelves, which had never been achieved until now, when the possibility, thanks to the presence of one or more external vapor touts to obtain a much more advantageous apparatus, both in terms of the yield on tanned hides only below that of production costs devices themselves.
  • a group of rotary vane pumps extracts vapors and of water from the condenser chambers on the worktops, due to the fact that vacuum valves through which vapors and water are introduced into the external vapor reel which, by means of a condensation system particular, has the effect of reducing all the residual vapors and transforming them into water, which is automatically expelled by means of one or more discharges of condensate.
  • the suction air which is now free of vapors or solid particles, is sent through a filter group which allows vacuum pumps of the type to oil bath paddles to work in optimal conditions without the introduction of foreign bodies.
  • the electrical operation of the installation can be checked at by means of a specially provided panel, or connected and controlled directly by the central control panel of the multi-shelf dryer, which will control, with a central computer, all the functions that are performed in the plan dryer multiple and in its control devices.
  • the condensers 1 arranged on the worktops are connected, via vacuum valves 2, to the reel of external vapors 3, provided with condensate discharges 4, while the vapors are sent through a cyclone 5 to the filter group 6, which is connected, by means of tubes, to the group of vacuum pumps 7, preferably of the vane type.
  • the residual steam passes through a vertical tube condenser 9, it is cooled inside by cold water which enters through the inlet opening 10 and leaves through the outlet opening 11, or vice versa. Steam, in contact with cold walls vertical tubes 9 of the condenser, condenses in water, which falls on the bottom to be expelled.
  • vapor guide walls In order to condense all possible vapor, vapor guide walls have been inserted 12, through which the condenser tubes 9 pass, walls which constrain the vapor to follow a course in the form of ⁇ S ⁇ , in order to have the best possible condensation.
  • vapor guide walls 12 are fixed to the condenser tubes 9 and are independent of the cold wall 8, so that they can thus be extracted together with the tubes 9 if necessary.
  • a cyclone 5 is mounted at the outlet of the vertical vapor reel, the discharge of which is connected to the bottom of the reel through the discharge tube 13.
  • the treated skin appears dried, retaining the maximum quality and specific characteristics of the skin.
  • Another advantage which is not negligible consists in the fact that the operator works on almost cold surfaces.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Drying Of Solid Materials (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)

Abstract

Drier for tanned hides consists of multiple work tables containing condensers linked through vacuum valves (2) to a chamber (3) with at least one condensate outlet (4) and a cyclone (5) which is connected in turn to filter and vacuum pump groups. The chamber has inner partitions with condenser tubes supported by vapour guides. These have the effect of cooling the vapours, converting them into water which is discharged automatically through the condensate outlets (4). The vapours which penetrate through the vacuum valves impinge on an inner partition and lose speed as they are converted into water, while any residual vapour is condensed by the tubes which have cold water passing through them, with the cyclone dealing with any remaining vapours and solid particles.

Description

La présente invention concerne un séchoir pour peaux tannées selon le préambule de la revendication 1.The present invention relates to a dryer for skins tanned according to the preamble of claim 1.

Il est connu que les peaux séchées dans des séchoirs sous vide présentent des défauts de qualité d'autant plus évidents que la température régnant sur les plans de travail est plus élevée.It is known that skins dried in vacuum dryers exhibit quality defects which are all the more evident as the temperature prevailing on the work is higher.

Il en résulte que la recherche d'installations qui permettent de sécher les peaux sous vide à une température aussi basse que possible est toujours d'actualité.As a result, the search for facilities to dry the skins vacuum as low as possible is still relevant.

Actuellement, tous les séchoirs sous vide pour peaux présentent une pompe à vide à anneau liquide (eau ou huile) qui crée un certain vide sur les tablettes où sont étendues les peaux, tablettes qui, naturellement, sont enfermées hermétiquement à l'aide de couvercles étanches.Currently, all vacuum dryers for skins have a vacuum with liquid ring (water or oil) which creates a certain vacuum on the shelves where extended skins, tablets which, naturally, are hermetically sealed using watertight covers.

Avec ces installations, on réussit à sécher les peaux d'une façon assez acceptable, mais certainement pas d'une façon idéale pour les peaux, en raison des températures très élevées (70°-80°) qu'on est contraint d'entretenir.With these facilities, we manage to dry the skins in a fairly acceptable, but certainly not ideal for skins, due to very high temperatures (70 ° -80 °) that we are forced to maintain.

On a obtenu une amélioration en ajoutant à cette pompe à anneau liquide un autre dispositif secondaire qui, en travaillant en série avec un compresseur volumétrique, réduit la pression absolue produite par la pompe principale à anneau liquide (100-40 mbar) jusqu'à une valeur d'environ 15-1 mbar.An improvement has been obtained by adding to this liquid ring pump a other secondary device which, working in series with a compressor volumetric, reduces the absolute pressure produced by the main ring pump liquid (100-40 mbar) up to a value of around 15-1 mbar.

Toutefois, pour pouvoir faire fonctionner ce dispositif secondaire, il est nécessaire d'ajouter aussi un groupe réfrigérant, appelé normalement 〈〈chiller〉〉, qui abaisse considérablement la température de l'eau dans les différents condenseurs prévus sur le séchoir à tablettes multiples, en maintenant la température de l'eau aux environ de 0°C. However, to be able to operate this secondary device, it is necessary to also add a cooling unit, normally called 〈〈chiller〉〉, which considerably lowers the water temperature in the various condensers provided on the multi-shelf dryer, keeping the water temperature around 0 ° C.

Comme on peut le comprendre, cette installation secondaire à compresseur volumétrique et groupe réfrigérant présente des coûts importants et, en outre, ce qui encore plus important, exige une consommation d'énergie électrique très élevée, de nature à décourager de nombreux acquéreurs potentiels pour des motifs de coûts de production.As can be understood, this secondary compressor installation volumetric and cooling unit presents significant costs and, moreover, which even more important, requires very high electrical energy consumption, likely to discourage many potential buyers for cost reasons production.

Une installation normale comportant une pompe à vide à anneau liquide peut en effet consommer plus de 20 kW/h, tandis qu'avec l'addition du dispositif secondaire, l'installation de réfrigération consomme plus de 100 kW/h.A normal installation with a liquid ring vacuum pump can effect consuming more than 20 kW / h, while with the addition of the secondary device, the refrigeration system consumes more than 100 kW / h.

Le but de la présente invention est de remédier aux inconvénients précités. Ceci est réalisé conformément aux caractéristiques de la partie caractérisante de la revendication 1. D'autres modes de réalisation avantageux font l'objet des sous-revendications.The object of the present invention is to remedy the aforementioned drawbacks. This is carried out in accordance with the characteristics of the characterizing part of the Claim 1. Other advantageous embodiments are the subject of the subclaims.

Grâce à l'invention, on réalise un séchoir qui crée le vide au moyen d'une ou de plusieurs pompes à palettes à couche d'huile, à monter sur les séchoirs de peaux à tablettes multiples, ce qui n'avait jamais été réalisé jusqu'à présent, lorsqu'il existe la possibilité, grâce à la présence d'un ou plusieurs rabatteurs de vapeurs extérieurs d'obtenir un appareillage nettement plus avantageux, aussi bien sous le rapport du rendement sur les peaux tannées que sous celui des coûts de réalisation des appareillages eux-mêmes.Thanks to the invention, a dryer is produced which creates the vacuum by means of one or more several oil-layer vane pumps, to be mounted on skin dryers multiple shelves, which had never been achieved until now, when the possibility, thanks to the presence of one or more external vapor touts to obtain a much more advantageous apparatus, both in terms of the yield on tanned hides only below that of production costs devices themselves.

En effet, avec l'addition des pompes des palettes à couche d'huile, on réussit à obtenir un degré de vide extrêmement élevé, ce qui n'avait jamais été obtenu jusqu'à présent dans le domaine du séchage des peaux.In fact, with the addition of the oil layer paddle pumps, we succeed in achieve an extremely high degree of vacuum, which had never been achieved until present in the field of drying skins.

En pratique, un groupe de pompes à palettes effectue l'aspiration de vapeurs et d'eau des chambres des condenseurs sur les plans de travail, du fait qu'il est prévu des vannes à vide par l'intermédiaire desquelles les vapeurs et l'eau sont introduites dans le rabatteur de vapeurs extérieur, lequel, au moyen d'un système de condensation particulier, a pour effet de rabattre toutes les vapeurs résiduelles et de les transformer en eau, qui est automatiquement expulsée au moyen d'une ou de plusieurs décharges de condensat.In practice, a group of rotary vane pumps extracts vapors and of water from the condenser chambers on the worktops, due to the fact that vacuum valves through which vapors and water are introduced into the external vapor reel which, by means of a condensation system particular, has the effect of reducing all the residual vapors and transforming them into water, which is automatically expelled by means of one or more discharges of condensate.

D'autres particules solides ou fumées résiduelles sont rabattues par un cyclone, placé à la suite du rabatteur de vapeurs extérieur.Other solid particles or residual smoke are knocked down by a cyclone, placed after the exterior vapor reel.

L'air d'aspiration, qui est désormais exempt de vapeurs ou de particules solides, est envoyé à travers un groupe filtrant qui permet ainsi aux pompes à vide du type à palettes à bain d'huile de travailler dans des conditions optimales, sans l'introduction de corps étrangers.The suction air, which is now free of vapors or solid particles, is sent through a filter group which allows vacuum pumps of the type to oil bath paddles to work in optimal conditions without the introduction of foreign bodies.

Le contrôle du fonctionnement électrique de l'installation peut s'effectuer au moyen d'un panneau spécialement prévu, ou connecté et commandé directement par le panneau de commande centrale du séchoir à tablettes multiples, lequel contrôlera, avec un ordinateur central, toutes les fonctions qui sont réalisées dans le séchoir à plans multiples et dans ses dispositifs de commande.The electrical operation of the installation can be checked at by means of a specially provided panel, or connected and controlled directly by the central control panel of the multi-shelf dryer, which will control, with a central computer, all the functions that are performed in the plan dryer multiple and in its control devices.

L'invention sera maintenant décrite ci-après de façon plus détaillée à l'aide des planches de dessins annexées, sur lesquelles :

  • La Fig. 1 (planche I) représente schématiquement l'ensemble de l'installation d'un séchoir à plans multiples réalisé selon l'invention.
  • La Fig. 2 (planche II) représente schématiquement la coupe verticale du rabatteur de vapeurs extérieur.
    • The invention will now be described below in more detail with the aid of the accompanying drawing plates, in which:
  • Fig. 1 (plate I) schematically represents the entire installation of a multiple plan dryer produced according to the invention.
  • Fig. 2 (Plate II) schematically represents the vertical section of the exterior vapor reel.

    • Comme on peut le remarquer sur la Fig. 1, les condenseurs 1 disposés sur les plans de travail sont reliés, par l'intermédiaire de vannes à vide 2, au rabatteur de vapeurs extérieur 3, muni des décharges des condensats 4, tandis que les vapeurs sont envoyées à travers un cyclone 5 au groupe filtrant 6, qui est relié, au moyen de tubes, au groupe des pompes à vide 7, de préférence du type à palettes.As can be seen in FIG. 1, the condensers 1 arranged on the worktops are connected, via vacuum valves 2, to the reel of external vapors 3, provided with condensate discharges 4, while the vapors are sent through a cyclone 5 to the filter group 6, which is connected, by means of tubes, to the group of vacuum pumps 7, preferably of the vane type.

    Comme ceci est mieux visible sur la Fig. 2, on remarquera que l'eau condensée dans les condenseurs 1 (voir Fig. 1) montés directement sur les plans de travail et la vapeur résiduelle entrent à travers les vannes à vide 2, en se rabattant ensuite contre la paroi froide 8, en perdant de la vitesse et en tombant immédiatement sur le fond, pour être expulsées au moyen des décharges de condensats 4, disposées sur le fond de la cuve 3.As this is better visible in FIG. 2, we will notice that the condensed water in condensers 1 (see Fig. 1) mounted directly on the worktops and the residual steam enters through the vacuum valves 2, then folds back against the cold wall 8, losing speed and immediately falling to the bottom, to be expelled by means of condensate discharges 4, arranged on the bottom of the tank 3.

    La vapeur résiduelle passe à travers un condenseur à tubes verticaux 9, elle est refroidie à l'intérieur par de l'eau froide qui entre par l'ouverture d'entrée 10 et sort par l'ouverture de sortie 11, ou inversement. La vapeur, en contact avec les parois froides des tubes verticaux 9 du condenseur, se condense en eau, qui tombe sur le fond pour être expulsée.The residual steam passes through a vertical tube condenser 9, it is cooled inside by cold water which enters through the inlet opening 10 and leaves through the outlet opening 11, or vice versa. Steam, in contact with cold walls vertical tubes 9 of the condenser, condenses in water, which falls on the bottom to be expelled.

    Dans le but de condenser toute la vapeur possible, on a inséré des parois guide-vapeurs 12, traversées par les tubes du condenseur 9, parois qui contraignent la vapeur à suivre un parcours en forme de 〈〈S〉〉, afin d'avoir la meilleure condensation possible.In order to condense all possible vapor, vapor guide walls have been inserted 12, through which the condenser tubes 9 pass, walls which constrain the vapor to follow a course in the form of 〈〈S〉〉, in order to have the best possible condensation.

    On précise que les parois guide-vapeurs 12 sont fixées aux tubes du condenseur 9 et sont indépendantes de la paroi froide 8, de sorte qu'elles peuvent ainsi être extraites conjointement avec les tubes 9 en cas de nécessité.It is specified that the vapor guide walls 12 are fixed to the condenser tubes 9 and are independent of the cold wall 8, so that they can thus be extracted together with the tubes 9 if necessary.

    Dans le but de rabattre les éventuelles vapeurs résiduelles ou particules solides, on monte, à la sortie du rabatteur de vapeurs vertical, un cyclone 5, dont la décharge est reliée au fond du rabatteur par l'intermédiaire du tube de décharge 13. In order to reduce any residual vapors or solid particles, a cyclone 5 is mounted at the outlet of the vertical vapor reel, the discharge of which is connected to the bottom of the reel through the discharge tube 13.

    Les avantages obtenus dans la présente installation, comparativement à celles qui sont actuellement en utilisation sont essentiellement les suivants :

  • 1) coût d'acquisition très limité (à peu près la moitié) sans aucune consommation d'énergie additionnelle comparativement aux pompes à vide normales à anneau liquide.
    • The advantages obtained in the present installation, compared to those which are currently in use are essentially the following:
  • 1) very limited acquisition cost (about half) without any additional energy consumption compared to normal liquid ring vacuum pumps.

    • La peau traitée se présente séchée, en conservant la qualité maximale et les caractéristiques propres de la peau.The treated skin appears dried, retaining the maximum quality and specific characteristics of the skin.

    On réussit à obtenir par ailleurs une économie de produits chimiques utilisés dans le traitement des peaux, avec réduction des coûts et de la pollution de l'environnement, tout en conservant la qualité des peaux inaltérée.We also manage to obtain savings on the chemicals used in the treatment of skins, with reduction of costs and pollution of the environment, while maintaining the quality of the skins unaltered.

    Il n'est nécessaire de prévoir aucun type d'installation secondaire ni de réfrigérant puisqu'on réussit à sécher à basse température même avec l'eau dans les condenseurs aux environs de 20°C.There is no need for any type of secondary installation or refrigerant since it succeeds in drying at low temperature even with water in the condensers around 20 ° C.

    Il est aussi possible d'obtenir une économie d'énergie notable sur les plans de travail.It is also possible to obtain a significant energy saving in terms of job.

    Un autre avantage qui n'est pas négligeable consiste dans le fait que l'opérateur travaille sur des surfaces presque froides.Another advantage which is not negligible consists in the fact that the operator works on almost cold surfaces.

    En outre, on a pu constater par les essais effectués, l'élimination d'une grande partie des fumées et des vapeurs dans le milieu de travail, ce qui constitue un avantage non négligeable.In addition, it has been observed by the tests carried out, the elimination of a large part of the fumes and vapors in the workplace, which is an advantage not negligible.

    Claims (7)

    SECHOIR POUR PEAUX TANNEES, comprenant des plans de travail multiples et des moyens d'aspiration, dans lequel des condenseurs (1) placés dans les plans de travail sont reliés, par l'intermédiaire de vannes à vide (2), à une cuve (3) munie d'au moins une décharge de condensats (4) et d'un cyclone (5), qui est à son tour relié à un groupe filtrant (6) et à un groupe de pompes à vide à palettes (7), caractérisé en ce que la cuve (3) est munie de parois intérieures de séparation (8) à l'intérieur desquelles sont montés des tubes condenseurs (9), soutenus par des parois guide-vapeurs (12) et qui ont pour effet de refroidir les vapeurs en les transformant en eau qui se décharge automatiquement par l'intermédiaire de la ou de chaque décharge de condensats (4).TANNED SKIN DRYER, including worktops multiple and suction means, in which condensers (1) placed in the worktops are connected, via vacuum valves (2), to a tank (3) provided with at least one condensate discharge (4) and a cyclone (5), which is in turn connected to a filter unit (6) and to a vane vacuum pump group (7), characterized in that the tank (3) is provided with internal partition walls (8) inside from which condenser tubes (9) are mounted, supported by vapor guide walls (12) and which have the effect of cooling the vapors by transforming them into water which discharge automatically via the or each discharge of condensates (4). SECHOIR POUR PEAUX TANNEES, selon la revendication 1, caractérisé en ce que les vapeurs qui pénètrent, à travers les vannes à vide (2), se rabattent contre la paroi intérieure de séparation (8), en perdant de la vitesse et en se transformant en eau liquide qui tombe immédiatement pour être expulsée par l'intermédiaire de la ou de chaque décharge des condensats (4).TANNED SKIN DRYER according to claim 1, characterized in that the vapors which penetrate, through the vacuum valves (2), fall back against the interior partition wall (8), losing speed and turning into water liquid that immediately falls to be expelled through the each condensate discharge (4). SECHOIR POUR PEAUX TANNEES, selon les revendications 1 et 2, caractérisé en ce que la vapeur résiduelle passe à travers une cuve munie intérieurement de tubes condenseurs verticaux (9) et refroidie à l'intérieur par de l'eau froide, ladite vapeur résiduelle se transformant ainsi en eau afin d'être expulsée par la ou chaque décharge de condensats (4).DRYER FOR TANNED SKIN according to claims 1 and 2, characterized in that the residual steam passes through an internally provided tank vertical condenser tubes (9) and cooled inside by cold water, said residual vapor thus transforming into water in order to be expelled by the or each condensate discharge (4). SECHOIR POUR PEAUX TANNEES selon les revendications 1 à 3, caractérisé en ce que, afin de condenser toute la vapeur possible, les parois guide-vapeurs (12) sont traversées par les tubes du condenseur (9) qui contraignent la vapeur à suivre un itinéraire en forme de 〈〈S〉〉.TANNED SKIN DRYER according to claims 1 to 3, characterized in that, in order to condense all possible vapor, the vapor guide walls (12) are crossed by the condenser tubes (9) which constrain the vapor to follow a route in the form of 〈〈S〉〉. SECHOIR POUR PEAUX TANNEES, selon les revendications 1 à 4, caractérisé en ce qu'afin de rabattre d'éventuelles vapeurs résiduelles ou des particules solides, le cyclone (5) est monté à la sortie de l'espace où sont insérés les tubes condenseurs (9) disposés à l'intérieur de la cuve (3), ledit cyclone (5) étant muni d'une décharge reliée au fond du rabatteur par l'intermédiaire de tubes de décharge (13).DRYER FOR TANTED SKIN, according to claims 1 to 4, characterized in that in order to reduce any residual vapors or particles solid, the cyclone (5) is mounted at the exit of the space where the tubes are inserted condensers (9) arranged inside the tank (3), said cyclone (5) being provided with a discharge connected to the bottom of the reel by means of discharge tubes (13). SECHOIR POUR PEAUX TANNEES selon les revendications 1 à 5, caractérisé en ce qu'à la suite du cyclone (5) sont placés un ou plusieurs filtres (6) qui permettent aux pompes à palettes (7) d'aspirer de l'air sec et propre.TANNED SKIN DRYER according to claims 1 to 5, characterized in that after the cyclone (5) one or more filters (6) are placed which allow the vane pumps (7) to suck dry and clean air. SECHOIR POUR PEAUX TANNEES, selon les revendications 1 à 6, caractérisé en ce que le vide régnant sur les plans de travail est obtenu au moyen d'une ou plusieurs pompes à palettes (7) du type à couche d'huile, en permettant de cette façon de réduire la pression résiduelle à l'intérieur des chambres à vide, grâce à la présence de la cuve (3), du cyclone (5) et des filtres (6).DRYER FOR TANTED SKIN, according to claims 1 to 6, characterized in that the vacuum prevailing on the work surfaces is obtained by means of a or more vane pumps (7) of the oil layer type, thereby allowing reduce the residual pressure inside the vacuum chambers, thanks to the presence of the tank (3), the cyclone (5) and filters (6).
    EP98109064A 1997-05-26 1998-05-19 Dryer for tanned hides Expired - Lifetime EP0881303B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    ITVI970078 1997-05-26
    IT97VI000078A IT1292997B1 (en) 1997-05-26 1997-05-26 DRYER FOR TANNED HIDES WITH MULTIPLE DECKS WITH SPECIAL TYPE OF SUCTION

    Publications (3)

    Publication Number Publication Date
    EP0881303A2 true EP0881303A2 (en) 1998-12-02
    EP0881303A3 EP0881303A3 (en) 1999-10-27
    EP0881303B1 EP0881303B1 (en) 2002-09-04

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    EP98109064A Expired - Lifetime EP0881303B1 (en) 1997-05-26 1998-05-19 Dryer for tanned hides

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    EP (1) EP0881303B1 (en)
    DE (1) DE69807580D1 (en)
    IT (1) IT1292997B1 (en)

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    ITVI20130009A1 (en) * 2013-01-17 2014-07-18 Cartigliano Off Spa COMPACT SYSTEM FOR VACUUM DRYING IN INDUSTRIAL SKINS

    Citations (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US3224109A (en) * 1962-02-09 1965-12-21 Cartigliano Off Spa Apparatus for the vacuum-drying of leather
    DE1959286A1 (en) * 1968-12-03 1970-06-18 Cartigliano Ind Metalmecc Vacuum drier for hides - with vacuum pump and steam condenser access

    Patent Citations (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US3224109A (en) * 1962-02-09 1965-12-21 Cartigliano Off Spa Apparatus for the vacuum-drying of leather
    DE1959286A1 (en) * 1968-12-03 1970-06-18 Cartigliano Ind Metalmecc Vacuum drier for hides - with vacuum pump and steam condenser access

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    ITVI20130009A1 (en) * 2013-01-17 2014-07-18 Cartigliano Off Spa COMPACT SYSTEM FOR VACUUM DRYING IN INDUSTRIAL SKINS

    Also Published As

    Publication number Publication date
    EP0881303A3 (en) 1999-10-27
    DE69807580D1 (en) 2002-10-10
    ITVI970078A1 (en) 1998-11-26
    EP0881303B1 (en) 2002-09-04
    IT1292997B1 (en) 1999-02-11
    ITVI970078A0 (en) 1997-05-26

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