EP1157134A1 - Leather tanning drum - Google Patents
Leather tanning drumInfo
- Publication number
- EP1157134A1 EP1157134A1 EP99963678A EP99963678A EP1157134A1 EP 1157134 A1 EP1157134 A1 EP 1157134A1 EP 99963678 A EP99963678 A EP 99963678A EP 99963678 A EP99963678 A EP 99963678A EP 1157134 A1 EP1157134 A1 EP 1157134A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drum
- cavities
- leather tanning
- mam
- mam body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000010985 leather Substances 0.000 title claims abstract description 15
- 239000000126 substance Substances 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 7
- 230000001105 regulatory effect Effects 0.000 claims abstract description 3
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 2
- -1 polypropylene Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 208000018672 Dilatation Diseases 0.000 abstract description 3
- 230000002547 anomalous effect Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 17
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 239000002699 waste material Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000013043 chemical agent Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 210000003477 cochlea Anatomy 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000006193 liquid solution Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010010 raising Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C15/00—Apparatus for chemical treatment or washing of hides, skins, or leather
Definitions
- the present invention concerns a leather tanning drum.
- the drum which, as it is known, is a big-sized, cylindrical-shaped machine rotating horizontally on its axle and large enough to contain several hundred kilos of skins, is generally used m at least three different phases of the aforesaid process, and more specifically m the soaking and liming, in the tanning and in the dyeing phase.
- Drums currently used which are in wood planking, often need massive and expensive washings as, though made of highly resistant wood, they undergo some degree of impregnation from the particularly aggressive chemical elements and compounds that are used in the tanning process .
- a tank is generally placed where waste products deposit and from which cochlea devices, or similars, keep collecting them; it is from this same tank that the chemical solution, after having been cleaned up and regenerated, enter the drum again through the same hollow shaft.
- the aim of the present invention is just to propose a drum provided with all the constructive and structural improvements which may enable the user to get over the aforementioned problems.
- a leather tanning drum consisting of a cylindrical mam body in polymeric material in which a plurality of cavities, or pockets, are longitudinally arranged along its internal surface, said longitudinal cavities being connected with other cavities which are located in corrispondence to one of the cylindrical main body circular surfaces and being connected also to a hollow shaft communicating with the outside, m such a way that, during the drum rotation around said shaft, the continuous exchange and homogeneous renovation of the chemical bath contained into the drum may take place.
- a metal framework having evident structural characteristics is externally connected with the cylindrical ma body of the drum; this framework is specifically designed to allow the thermal dilatations of the mam body m polymeric material .
- At least one door for the introduction and removal of leathers in and from the drum is kept closed by the help of elastic means regulated so as to assure a perfect seal under normal operating conditions and, at the same time, working as a safety-valve in the event of anomalous raisings of the drum internal pressure.
- the drum of the present invention includes also other constructive improvements that fit with the above-mentioned innovative structural features and contribute to improve its general hardiness and resistance in agreement with the special operating conditions.
- FIG. 1 is a total view, in partial section, in which the structural scheme of the drum of the invention is shown;
- FIG. 2 and 3 are two views in transversal section obtained through the section line I-I of fig.l, properly rotated, and referred to two different angular positions of the drum ma body;
- FIG. 4 is a view in longitudinal section obtained through the section line IV-IV of fig.2;
- FIG. 5 is another view in longitudinal section obtained following the section line V-V of fig.2;
- ⁇ is a side view of the drum of the present invention.
- FIG. 7 and figure 8 are two detailed views of the closing device of the drum of fig.l;
- FIG. 9 is a detailed view of a particular portion of the drum structure
- a leather tanning drum according to the present invention. It is composed of a mam cylindrical body [11], m polymeric material, horizontallv rotating on its axle bv the help of a gearmotor unit [12] having an output pmion [13] engaging with a gear [14] directly coupled to said cylindrical body [11].
- the partially sectioned view of fig.l shows that the rotation shaft [15] of the drum [10] is internally hollow and divided in four sections separated by two orthogonal dividing plates [16, 17] which are more clearly illustrated m figures 2 and 3, said dividing plates being rotating together with the shaft [15] which is supported, free of rotating, on the structure [18].
- a metal framework [19] composed of two 6-spoke structures placed in correspondence of the mam body [11] circular surfaces [20, 21], and linked to one another by double C- shaped longitudinal bars [22], as it is clearly shown in fig.2 and 11.
- connection between the framework [19] and the drum mam body [11] is obtained using both screw means [23] linking the lateral 6-spoke structures to the circular surfaces [20, 21] and other screw means [24] fastening the longitudinal bars [22] to the cylindrical body [11] side sur ace .
- the screw means [24] are useful also to fasten the so-called pegs [25] to the mam body [11], said pegs being arranged on the inside of the drum sc as to help the leathers dragging during the rotation; their fastening is obtained according to the connection scheme illustrated m fig.11. As regards the rows of pegs [25] which are not positioned in correspondence with the external bars [22], the fastening scheme is the one illustrated in fig.10.
- an auxiliary internal support [28] is used, of rectangular or similar shape, affecting the pegs fixing area only and also made in polymeric material; differently, we can see in fig. 11 how the peg is internally inserted on longitudinal supports [29] shaped so as to help supporting the side edges of the panels [30] which constitute the internal walls of the longitudinal cavities [31] dedicated to the re-circulation of the liquid mass in which the leathers are soaking.
- the above panels [30] are fact provided with several holes [32], clearly shown in fig.
- Fig. 2 and 3 just show the shape of said lateral cavities [33], two of which, for comprehension purposes, are clearly- illustrated in detail, without their closing panel, while the other two, symmetrical to the former ones in respect of the shaft [15] position, are illustrated with the closing panel [38] regularly closed.
- each of the cavities [33] is independentlv connected with each one of the sections the hollow shaft [15] is divided into; this obviously facilitates the exchange of the liquid and the substances in it towards the external depuration tank, which has not been shown in the annexed drawings as being of known technique.
- connection between the lateral cavities [33] and the drum internal space is achieved not only through the longitudinal cavities [31], but also through the cavities with triangular section [39] positioned on the edge of the circular surface [20]; in fact, on the panel [40] delimitating these cavities [39] we can find two diametrically opposed areas [41] suitably provided with holes .
- the door opening is performed by translating it along the sliding seats [44] after having lifted the door up from the position shown m fig. 7 to the one of fig. 8; this lifting is made possible by the action of the small hydraulic cylinders [54] fixed to the spring supporting brackets [52] by screws [55].
- the pistons [56] of said small cylinders [54] act against the grooved pieces [51] causing the springs [48] to be more compressed and, consequently, the brackets [52] move from the hatch [45] to which the pieces [51] are radially coupled.
- a rubber ring [57] is positioned all around the door edge [42] order to assure a perfect seal between the door and the hatch.
- Suitable cylindrical pieces [58], fixed to the brackets [52], are positioned mside the springs [48], acting as guiding elements.
- the connection between the framework and the cylindrical mam body [11] is designed so as to let some free space [61] between the framework itself and the drum mam body m correspondence with the peripheral areas of the circular surfaces [20, 21]; this free space allows the necessary degree of dilatation of the mam body [11], in polymeric material, due to the thermal excursions caused by the different treatments of the skins, which are being performed.
- the drum of the present invention operates as follows.
- the door [42] After introducing the leathers and liquid mass containing the necessary chemical substances, the door [42] is moved to the closing position by sending the suitable input to the supplying hydraulic circuit of the actuators [43]; at this point, the hydraulic circuit of the small cylinders [54] is released, m order to let the drum door to be pressed against the hatch [45].
- the drum is, then, ready to be started m its rotation movement by activating the motorgear unit [12].
- R as the drum rotation sense, we can see that cavities 33a and 33c are dedicated to the liquid and various substances outflow from inside the drum, while cavities 33b and 33d are intended to the re-entering of the liquid in the drum after it has been depurated in the external tank.
- cavity 33a begins to be interested by the liquid, present inside the drum at about the level indicated in the figure, which reaches the cavity itself [33a] through the peripheral cavity [39], wherein the liquid has already flowing through the holes of area 41a; the same is not possible for the other cavity [33d], as it, m this moment, is not communicating with area 41a of cavity 39 but with area 41b, which, in that angular position, or m those ones immediately following mt, is positioned on the drum upper part, not reached by the liquid. Therefore, when the drum, in its rotation, reaches the angular position of fig.
- cavities 33c and 33b which are exactly symmetrical to cavities 33a and 33d respectively.
- cavities 33b and 33d become the ones dedicated to the liquid outflow towards the outside, while cavities 33a and 33c are intended to let the depurated liquid re-enter the drum.
- the chemical bath re- circulation is homogeneous and involves the whole liquid mass, as, like we see in fig.5, while the liquid flowing from the drum to the outside comes from the drum right side, where we find areas 41 feeding the exit cavities 33a and 33c, the depurated liquid re-enters the drum through the holes 32, which are connected with the entering cavities 33b and 33d and which are positioned on the drum left side.
- connection scheme among the different cavities might, for example, be varied, in particular between the exit lateral cavities and the drum areas from which the liquid is collected, or else, new unidirectional devices for the flux exiting or entering the lateral cavities [33] might be employed; further, both the lateral and longitudinal cavities shape might be modified; the latter might, for example, be positioned obliquely along the drum internal surface rather than longitudinally; these all represent modi ications that might be easily carried out in the industry thanks to the material composing the drum mam body and its various internal devices, it consisting, m particular, of polypropylene.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
- Treatment Of Fiber Materials (AREA)
- Stringed Musical Instruments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITPI980085 | 1998-12-30 | ||
IT1998PI000085A IT1304546B1 (en) | 1998-12-30 | 1998-12-30 | BOTTLE FOR THE TANNING OF LEATHER WITH EXTRUCTURAL BUILDING PERFECTIONS. |
PCT/IT1999/000426 WO2000040761A1 (en) | 1998-12-30 | 1999-12-29 | Leather tanning drum |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1157134A1 true EP1157134A1 (en) | 2001-11-28 |
EP1157134B1 EP1157134B1 (en) | 2004-11-10 |
Family
ID=11394339
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99963678A Revoked EP1157134B1 (en) | 1998-12-30 | 1999-12-29 | Leather tanning drum |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP1157134B1 (en) |
AT (1) | ATE282094T1 (en) |
AU (1) | AU2001700A (en) |
BR (1) | BR9916660B1 (en) |
DE (1) | DE69921859T2 (en) |
ES (1) | ES2233092T3 (en) |
IT (1) | IT1304546B1 (en) |
WO (1) | WO2000040761A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6935144B2 (en) | 2003-01-03 | 2005-08-30 | Council Of Scientific And Industrial Research | Device for leather processing |
WO2004061136A1 (en) * | 2003-01-03 | 2004-07-22 | Council Of Scientific And Industrial Research | Device for leather processing |
ITVI20040189A1 (en) * | 2004-07-27 | 2004-10-27 | Erretre Spa | BOTTAL STRUCTURE FOR THE TREATMENT OF LEATHER AND SIMILAR PRODUCTS |
ES2306546B1 (en) * | 2005-03-22 | 2009-11-11 | Italprogetti Engineering S.P.A. | DRUM WITH CONSTRUCTIVE IMPROVEMENTS SUITABLE FOR THE TREATMENT, IN PARTICULAR, OF SKIN, TEXTILE OR SIMILAR PRODUCTS IN WHICH CHEMICAL PRODUCTS OF ELEVADA AGGRESSIVE ARE USED. |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB661894A (en) * | 1949-01-06 | 1951-11-28 | Frank Vetorino | Cylinder door securing means |
GB1274035A (en) * | 1968-09-12 | 1972-05-10 | Svu Kozedelny | Mixing drum for the processing of fibrous materials |
DE2648057C3 (en) * | 1976-10-23 | 1980-06-26 | Werner 7585 Lichtenau Dose | Device for tanning, dyeing or the like |
DE3029856C2 (en) * | 1980-08-07 | 1982-12-23 | Ludwig Dose | Device for tanning, dyeing or the like. |
JPS6220600A (en) * | 1985-07-18 | 1987-01-29 | 藤本 良伸 | Leather washing treatment apparats for tanning |
-
1998
- 1998-12-30 IT IT1998PI000085A patent/IT1304546B1/en active
-
1999
- 1999-12-29 AT AT99963678T patent/ATE282094T1/en not_active IP Right Cessation
- 1999-12-29 AU AU20017/00A patent/AU2001700A/en not_active Abandoned
- 1999-12-29 BR BRPI9916660-7A patent/BR9916660B1/en not_active IP Right Cessation
- 1999-12-29 ES ES99963678T patent/ES2233092T3/en not_active Expired - Lifetime
- 1999-12-29 WO PCT/IT1999/000426 patent/WO2000040761A1/en active IP Right Grant
- 1999-12-29 EP EP99963678A patent/EP1157134B1/en not_active Revoked
- 1999-12-29 DE DE69921859T patent/DE69921859T2/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0040761A1 * |
Also Published As
Publication number | Publication date |
---|---|
ES2233092T3 (en) | 2005-06-01 |
DE69921859D1 (en) | 2004-12-16 |
DE69921859T2 (en) | 2005-10-27 |
IT1304546B1 (en) | 2001-03-19 |
AU2001700A (en) | 2000-07-24 |
ITPI980085A0 (en) | 1998-12-30 |
WO2000040761A1 (en) | 2000-07-13 |
BR9916660B1 (en) | 2008-11-18 |
ATE282094T1 (en) | 2004-11-15 |
ITPI980085A1 (en) | 2000-06-30 |
BR9916660A (en) | 2001-09-25 |
EP1157134B1 (en) | 2004-11-10 |
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