EP1148144B1 - Leather perching machine - Google Patents
Leather perching machine Download PDFInfo
- Publication number
- EP1148144B1 EP1148144B1 EP20010109619 EP01109619A EP1148144B1 EP 1148144 B1 EP1148144 B1 EP 1148144B1 EP 20010109619 EP20010109619 EP 20010109619 EP 01109619 A EP01109619 A EP 01109619A EP 1148144 B1 EP1148144 B1 EP 1148144B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pair
- belts
- section
- conveyor belts
- machine according
- 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.)
- Expired - Lifetime
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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
- C14B1/40—Softening or making skins or leather supple, e.g. by staking, boarding, or crippling machines, by dry mills
Definitions
- the present invention relates to an improved perching machine, in particular for softening and stretching industrial hides or the like.
- These machines comprise one or more working heads each consisting of one or more pairs of substantially parallel plates which perform a periodic movement towards and away from each other in a direction substantially perpendicular to the plane in which they lie and between which the hides, retained by a pair of facing conveyor belts, are fed.
- the plates are normally provided with tools or projections able to co-operate during contact with projections or recesses with a matching shape on the opposite plate.
- Motorised rollers are located in the space existing between the successive working sections, in the zone separating the pairs of facing belts, with the function of restoring the continuity between the adjacent conveyor belts and preventing the hides from falling. These rollers also rotate at a constant peripheral speed equal to the feed speed of the pairs of conveyor belts, so as to ensure the continuous feeding of the products being processed.
- each hide introduced into the machine after passing through the first working section retained by the pair of facing belts, is conveyed by the intermediate rollers and introduced into the successive pair of belts which have the same peripheral speed so as to complete the perching action.
- the main object of the present invention is to devise an improved perching machine which allows a substantial increase in the degree of elongation of the hides in the longitudinal direction and therefore the overall square footage thereof.
- a particular object is to provide a perching machine which allows the hides to be stretched lengthwise during their feeding movement.
- a further object is to provide a perching machine which allows an adjustment in the degree of elongation in the longitudinal direction depending on the type of hides being processed.
- an object is to provide a perching machine with a hide feeding system which can be made using components readily available on the market so as to be advantageous from a purely economic point of view and easy to maintain.
- an improved perching machine for softening and stretching industrial hides or the like which, in accordance with Claim 1, comprises at least one first section and at least one second section operationally coupled and located downstream of the first section, each of said sections being formed by at least one pair of mutually facing conveyor belts for retaining and conveying the hides and by at least one pair of plates substantially parallel to said belts and acting on opposite sides thereof for softening and stretching the hides, characterized in that the pair of conveyor belts of the downstream section has a feed speed greater than the pair of belts of the upstream section.
- the hides are subject to a stretching action in the longitudinal direction when passing from the first section to the second section.
- Figure 1 illustrates an embodiment of the perching machine according to the invention - denoted overall by the reference number 1 - which has an entry zone 3 and an exit zone 4 for the hides P to be processed which advance along a substantially horizontal plane W.
- the machine comprises a load-bearing bench or structure 2 which is formed by strong welded or bolted steel beams and on which a plurality of working sections or heads are mounted.
- the machine has two sections, i.e. a first section 5 and a second section 5', located in succession and operationally connected together.
- the two sections 5, 5' are substantially similar to each other and have a certain number of parts necessary for feeding and processing of the hides P.
- the first section or upstream section 5 comprises means for feeding the hides P, consisting of a first pair of conveyor belts 6, 7 with respective portions 8, 9 which are substantially straight and horizontal and facing each other in order to retain the hides P inserted into the entry zone 3 of the machine.
- the section 5 also comprises one or more pairs of contact plates or weights - denoted respectively by 10, 11, 12, 13 - acting against the belts 6, 7 along their straight portions 8, 9 on opposite sides with respect to the feeding plane W of the hides P.
- the upper plates 10, 11 are fixed and secured stably to the bench 2, while the lower plates 12, 13 are movable and connected to the top end of connecting rods 14, 15 in turn moved by respective cams 16, 17 driven rotationally by motors 18, 19.
- the upper plates 10, 11 have suitable tools or projections able to co-operate with counter-tools or recesses of matching shape formed in the lower plates 12, 13.
- the position of the projections or recesses on the respective plates may be reversed or both the plates may be provided with projections which are suitably staggered so as to co-operate with each other and with the hides P.
- the second section or downstream section 5' comprises a second pair of conveyor belts 6', 7' with respective portions 8', 9' which are substantially straight and horizontal and facing each other so as to retain the hides P located in between and to feed them towards the exit zone 4.
- the contact plate or weights denoted respectively by 10', 11', 12', 13', act on the belts 6', 7' along their straight portions 8', 9', on opposite sides with respect to the feeding plane W of the hides P.
- the pair of conveyor belts of the downstream section has a feed speed V' greater than that of the pair of belts of the upstream section so as to exert on the hides a stretching force in the longitudinal direction when passing from one section to the next section.
- each section comprises an independent motor acting on a respective pair of conveyor belts so as to impart varied speeds thereto.
- a first electric motor 20 is coupled by means of a first drive belt 21 to the rollers 22, 23 which drive the first pair of conveyor belts 6, 7.
- a second electric motor 20' is coupled by means of a second drive belt 21' to the rollers 22', 23' which drive the second pair of conveyor belts 6', 7'.
- Means are provided for adjusting the speed of each individual motor 20, 20' so as to vary continuously the feed speed V, V' of each individual pair of conveyor belts 6, 7, 6', 7' or the feed speed ratio V/V' of the respective pair of conveyor belts.
- These adjusting means may consist of a microprocessor unit 24 connected to an interface 25 provided with a display 26 and keyboard 27 in order to allow an operator to program the variation in speed by means of the variation in the supply voltage of each individual motor 20, 20'.
- the ratio V'N between the feed speed V' of the pair of belts 6', 7' of the downstream section 5' and that V of the pair of conveyor belts 6, 7 of the upstream section 5 is between 1 and 4 and is preferably equal to about 1.2.
- V' of between 2 m/s and 15 m/s and preferably between 3 m/s and 12 m/s excellent results are obtained.
- At least one motorised roller 28 is provided in the space located between the pairs of conveyor belts 6, 7, 6', 7' of the two sections, said roller optionally being driven by one of the conveyor belts 7' so that it has a tangential speed V" which is in between the speeds V, V' of the pairs of adjacent belts.
- the said hide undergoes a stretching action which is more or less uniform in all directions while it is fed by the first pair of belts 6, 7 at a substantially constant speed V, after which it passes through the intermediate roller 28 to the second pair of conveyor belts 6', 7' at a substantially constant speed V'>V.
- V substantially constant speed
- the pairs of conveyor belts 6, 7 and 6', 7', respectively, of the two adjacent sections may be connected to a single motor by means of respective reducers having different transmission ratios so as to impart varied speeds to the pairs of belts.
- the perching machine according to the present invention achieves the predefined objects and in particular attention is drawn to its capacity to increase the stretching of the hides in the longitudinal direction of feeding thereof along the conveyor belts.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Structure Of Belt Conveyors (AREA)
- Insulators (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITVI000071 | 2000-04-19 | ||
| ITVI20000071 IT1315318B1 (it) | 2000-04-19 | 2000-04-19 | Macchina palissonatrice migliorata |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1148144A2 EP1148144A2 (en) | 2001-10-24 |
| EP1148144A3 EP1148144A3 (en) | 2001-12-19 |
| EP1148144B1 true EP1148144B1 (en) | 2004-07-07 |
Family
ID=11461236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20010109619 Expired - Lifetime EP1148144B1 (en) | 2000-04-19 | 2001-04-18 | Leather perching machine |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1148144B1 (it) |
| IT (1) | IT1315318B1 (it) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1280605B1 (it) * | 1995-11-06 | 1998-01-23 | Michele Zanette | Testa e macchina palissonatrice modulare, particolarmente per stirare ed ammorbidire pelli industriali e prodotti similari |
| IT1308153B1 (it) * | 1999-05-10 | 2001-11-29 | Cartigliano Off Spa | Macchina palissonatrice a piastre battenti. |
-
2000
- 2000-04-19 IT ITVI20000071 patent/IT1315318B1/it active
-
2001
- 2001-04-18 EP EP20010109619 patent/EP1148144B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| IT1315318B1 (it) | 2003-02-10 |
| EP1148144A3 (en) | 2001-12-19 |
| ITVI20000071A1 (it) | 2001-10-19 |
| EP1148144A2 (en) | 2001-10-24 |
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