EP0036183A2 - Process and apparatus for the surface extension and drying of leather pieces, skins and similar materials - Google Patents
Process and apparatus for the surface extension and drying of leather pieces, skins and similar materials Download PDFInfo
- Publication number
- EP0036183A2 EP0036183A2 EP81101832A EP81101832A EP0036183A2 EP 0036183 A2 EP0036183 A2 EP 0036183A2 EP 81101832 A EP81101832 A EP 81101832A EP 81101832 A EP81101832 A EP 81101832A EP 0036183 A2 EP0036183 A2 EP 0036183A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- foils
- leather
- films
- space
- drying
- 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 40
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000001035 drying Methods 0.000 title claims abstract description 7
- 239000000463 material Substances 0.000 title claims abstract 3
- 239000011888 foil Substances 0.000 claims abstract description 41
- 230000005855 radiation Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 3
Images
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
- C14B1/26—Leather tensioning or stretching frames; Stretching-machines; Setting-out boards; Pasting boards
Definitions
- stenter dryers are most effective because the leather is pre-tensioned on the stenter before the drying process.
- One of the major disadvantages is that the prestressing is carried out manually using a large number of so-called leather clips, since the leather has a geometrically undefined outline.
- the invention eliminates this disadvantage in such a way that elastic air-impermeable foils are arranged from both sides of the leather, the space between the leather and the two foils is connected to vacuum, and then with forces which are predominantly in the plane of the two foils , the area of the foils is enlarged.
- Thermal energy is added to the leather that is between the foils, e.g. by infrared radiation of the foils, by means of contact heat or the damp leather is heated by means of radio frequency energy.
- the effect of the forces on the foils is variable during the treatment of the leather, e.g. repeated pulsating or oscillating effects.
- FIGS. 1-3 Exemplary designs of the devices that work according to this method are shown in FIGS. 1-3.
- the device shown in FIG. 1 works with 2 foils 2 and 3, which have a round shape 10.
- the leather 1 is placed between the two foils 2 and 3 (for example, the entire upper part of the device is moved away with the foil 2 upwards or to the side). Then both slides 2 and 3 are moved together again.
- the space 4 is sealed with the help of the seal 7, which is located near the edges 8 of the foils.
- the room 4 is connected to a vacuum 5.
- the atmospheric pressure now presses from the outside onto both foils 2 and 3 and thus onto the leather 1.
- Ropes 15 are fastened to the edges 8 of the two foils 2 and 3 and are fed centrally to a hydraulic cylinder 14 via deflection rollers.
- a rope system is used for both foils 2 and 3.
- the ropes 15 exert a force on the edges 8 of the two foils 2 and 3 in such a way that the area of both foils is increased. Since the same If the foils are pressed onto the leather 1 from both sides with the aid of atmospheric pressure, the leather follows the expansion of the two foils and the area of the leather increases. It is possible to repeat this process as required. When the foils return to the starting position, the vacuum is released. If the films are pulled apart repeatedly, the vacuum is built up again. When the leather dries, thermal energy is supplied to the leather, as in this arrangement, for example, by means of irradiation with infrared radiators 9.
- the foils 2 and 3 have a square shape 11.
- the force itself is exerted on the foils by means of hydraulic cylinders 14 which act directly on the edges of the foils. Since the hydraulic cylinders 14 only act on the lower film 3, the upper film 2 is mechanically carried along with the film 3 at the edges 8 when the film is moved apart.
- the workflow is the same as for the device in FIG. 1.
- FIG. 3 shows an arrangement in which the foils 2 and 3 are designed as conveyor belts 12 and 13.
- the leather 1 is placed on the conveyor belt 13 and spread out and then transported into the space 4 by means of the movement of both conveyor belts. In this position, the leather is sealed with the help of seals 7 between the two bands, the space 4 is connected to vacuum 5. With the help of hydraulic cylinders 14, both bands are stretched both in the longitudinal direction and increased in width by the action 6 on the edges 8.
- the leather 1 is either transported back out of the space between the two conveyor belts or continuously transported forward. With this arrangement, too, it is possible to supply thermal energy to the leather by means of radiators 9 or the room 4 can lie in an electrical high-frequency field.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
- Drying Of Solid Materials (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Noodles (AREA)
- Stringed Musical Instruments (AREA)
- Seeds, Soups, And Other Foods (AREA)
- Road Signs Or Road Markings (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
Bei diesem Verfahren zur Flächenvergrößerung und -trocknung von Lederstücken, Fellen und ähnlichen flachen Materialien werden von beiden Seiten des Leders (1) elastischen für Luft undurchlässige Folien (2) und (3) angeordnet, der Raum (4) zwischen Leder (1) und den beiden Folien (2) und (3) wird an Vakuum (5) angeschlossen, und danach wird mit Kräften, die vorwiegend in der Ebene der beiden Folien (2) und (3) liegen, die Fläche der Folien (2) und (3) und dadurch auch des Leders (1) vergrößert. Die Vorrichtung zur Ausführung des Verfahrens wird mit folgenden Merkmalen charakterisiert: Elastische für Luft undurchlässige Folien (2) und (3), Raum (4) zwischen Leder (1) und den beiden Folien (2) und (3) an Vakuum (5) anschließbar, Abdichtungen (7) an den Rändern der Folien (2) und (3), Krafteinwirkung (6) in der Ebene der Folien (2) und (3), die die Vergrößerung der Flächen der Folien (2) und (3) und dadurch auch des Leders (1) bewirkt. Bei gleichzeitiger Trocknung wird mindestens eine Folie der Folien (2) und (3) beheizt (z.B. durch Bestrahlung mit Infrarotstrahlern (9)).In this process for enlarging and drying the surface of leather pieces, skins and similar flat materials, elastic (2) and (3) air-impermeable foils are arranged from both sides of the leather (1), the space (4) between leather (1) and the two foils (2) and (3) are connected to vacuum (5), and then the forces on the surface of the foils (2) and (3) are predominantly in the plane of the two foils (2) and (3). 3) and thereby also the leather (1) enlarged. The device for carrying out the method is characterized by the following features: elastic air-impermeable foils (2) and (3), space (4) between leather (1) and the two foils (2) and (3) under vacuum (5) connectable, seals (7) on the edges of the foils (2) and (3), force (6) in the plane of the foils (2) and (3), which increases the area of the foils (2) and (3) and thereby also causes the leather (1). With simultaneous drying, at least one film of films (2) and (3) is heated (e.g. by irradiation with infrared radiators (9)).
Description
Was den Flächengewinn bei Ledertrocknung betrifft, so sind Spannrahmentrockner am wirkungsvollsten, weil das Leder vor dem Trocknungsprozeß auf den Spannrahmen vorgespannt wird. Einer der großen Nachteile ist, daß die Vorspannung manuell durchgeführt wird mit Hilfe einer großen Stückzahl von sogenannten Lederklammern, da das Leder einen geometrisch unbestimmten Umriß aufweist. Die Erfindung beseitigt diesen Nachteil auf die Weise, daß von beiden Seiten des Leders elastische für Luft undurchlässige Folien angeordnet werden, der Raum zwischen Leder und den beiden Folien an Vakuum angeschlossen wird, und danach mit Kräften, die vorwiegend in der Ebene der beiden Folien liegen, die Fläche der Folien vergrößert wird. Dem Leder, das sich zwischen den Folien befindet, wird Wärmeenergie zugeführt, z.B. durch Infrarotbestrahlung der Folien, mittels Kontaktwärme oder das feuchte Leder wird mittels Hochfrequenzenergie erhitzt.As far as the area gain in leather drying is concerned, stenter dryers are most effective because the leather is pre-tensioned on the stenter before the drying process. One of the major disadvantages is that the prestressing is carried out manually using a large number of so-called leather clips, since the leather has a geometrically undefined outline. The invention eliminates this disadvantage in such a way that elastic air-impermeable foils are arranged from both sides of the leather, the space between the leather and the two foils is connected to vacuum, and then with forces which are predominantly in the plane of the two foils , the area of the foils is enlarged. Thermal energy is added to the leather that is between the foils, e.g. by infrared radiation of the foils, by means of contact heat or the damp leather is heated by means of radio frequency energy.
Die Einwirkung der Kräfte auf die Folien ist in der Zeit der Behandlung des Leders veränderlich, z.B. wiederholte pulsierende oder oszillierende Einwirkungen.The effect of the forces on the foils is variable during the treatment of the leather, e.g. repeated pulsating or oscillating effects.
Auf diese Weise ist es mittels dieses Verfahrens möglich, das Leder entweder zu trocknen und dabei die Fläche des Leders optimal zu vergrößern, oder schon ganz fertiges Leder zu behandeln, wobei seine Fläche um einen gewissen Prozentsatz bleibend vergrößert wird.In this way, it is possible by means of this method either to dry the leather and thereby optimally enlarge the area of the leather, or to treat leather that is already completely finished, its area being permanently increased by a certain percentage.
Beispielhafte Ausführungen der Vorrichtungen, die nach diesem Verfahren arbeiten, sind auf den Figuren 1-3 abgebildet.Exemplary designs of the devices that work according to this method are shown in FIGS. 1-3.
Die Ziffern auf den Figuren bedeuten:
Die auf Figur 1 abgebildete Vorrichtung arbeitet mit 2 Folien 2 und 3, die eine runde Form 1o ausweisen. Das Leder 1 wird zwischen beide Folien 2 und 3 hineingelegt (z.B. wird der ganze obere Teil der Vorrichtung mit der Folie 2 nach oben oder seitlich weggefahren). Dann werden beide Folien 2 und 3 wieder zusammengefahren. Der Raum 4 wird mit Hilfe der Dichtung 7, die sich in der Nähe der Ränder 8 der Folien befindet, abgedichtet. Der Raum 4 wird an ein Vakuum 5 angeschlossen. Der athmosphärische Druck drückt jetzt von außen auf beide Folien 2 und 3 und so auf das Leder 1. Zu den Rändern 8 der beiden Folien 2 und 3 werden Seile 15 befestigt, die über Umlenkrollen zentral zu einem hydraulischen Zylinder 14 zugeführt werden. Es wird ein Seilensystem für beide Folien 2 und 3 benutzt. Wenn die hydraulischen Zylinder 14 ausgefahren werden, wird mit Hilfe der Seile 15 auf die Ränder 8 der beiden Folien 2 und 3 so eine Kraftwirkung ausgeübt, daß die Fläche von beiden Folien vergrößert wird. Da gleichzeitig die Folien mit Hilfe von athmosphärischem Druck an das Leder 1 von beiden Seiten angedrückt werden, folgt das Leder der Ausdehnung der beiden Folien und die Fläche des Leders wächst. Es ist möglich, diesen Vorgang beliebig zu wiederholen. Bei Rückkehr der Folien in die Ausgangsposition wird das Vakuum aufgelöst. Bei wiederholtem Auseinanderziehen der Folien wird das Vakuum wieder neu aufgebaut. Bei Trocknung des Leders wird dem Leder 1 Wärmeenergie zugeführt, wie z.B. bei dieser Anordnung mit Hilfe von Bestrahlung mit Infrarotstrahler 9.The device shown in FIG. 1 works with 2
Bei der konstruktiven Ausführung auf Figur 2 haben die Folien 2 und 3 eine quadratische Form 11. Die Krafteinwirkung selbst wird auf die Folien mittels hydraulischen Zylindern 14 ausgeübt, die direkt auf die Ränder der Folien wirken. Da die hydraulischen Zylinder 14 nur auf die untere Folie 3 wirken, wird die obere Folie 2 bei dem Auseinanderfahren der Folie mechanisch mit der Folie 3 an den Rändern 8 mitgenommen. Der Ablauf der Arbeit ist gleich wie bei der Vorrichtung auf Figur 1.2, the
Die Figur 3 zeigt eine Anordnung, bei welcher die Folien 2 und 3 als Transportbänder 12 und 13 ausgebildet sind. Das Leder 1 wird auf das Transportband 13 aufgelegt und ausgebreitet und dann mit Hilfe der Bewegung von beiden Transportbändern in den Raum 4 hineintransportiert. In dieser Position wird das Leder mit Hilfe von Dichtungen 7 zwischen den beiden Bändern abgedichtet, der Raum 4 an Vakuum 5 angeschlossen. Mit Hilfe von hydraulischen Zylindern 14 werden beide Bänder sowohl in der Längsrichtung gespannt als auch in der Breite durch die Einwirkung 6 auf die Ränder 8 vergrößert.FIG. 3 shows an arrangement in which the
Das Leder 1 wird aus dem Raum zwischen den beiden Transportbändern entweder zurücktransportiert oder durchlaufend nach vorne befördert. Auch bei dieser Anordnung ist es möglich, dem Leder Wärmeenergie zuzuführen mittels Strahler 9 oder der Raum 4 kann in einem elektrischen Hochfrequenzfeld liegen.The leather 1 is either transported back out of the space between the two conveyor belts or continuously transported forward. With this arrangement, too, it is possible to supply thermal energy to the leather by means of
Bei der wiederholten Kräfteeinwirkung auf das Leder bei dem Trocknungsprozess (dynamische Wirkung) ist auch eine Steigerung der Griffeigenschaften des Leders (das Leder wird weich) zu beobachten.With the repeated application of force to the leather during the drying process (dynamic effect), an increase in the grip properties of the leather (the leather becomes soft) can also be observed.
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT81101832T ATE10209T1 (en) | 1980-03-15 | 1981-03-12 | METHOD AND DEVICE FOR INCREASE AND DRYING THE SURFACE OF LEATHER PIECES, SKINS AND SIMILAR MATERIALS. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3010003 | 1980-03-15 | ||
DE3010003A DE3010003C2 (en) | 1980-03-15 | 1980-03-15 | Method and device for enlarging and drying areas of leather, hides and similar materials |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0036183A2 true EP0036183A2 (en) | 1981-09-23 |
EP0036183A3 EP0036183A3 (en) | 1982-07-14 |
EP0036183B1 EP0036183B1 (en) | 1984-11-07 |
Family
ID=6097309
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81101832A Expired EP0036183B1 (en) | 1980-03-15 | 1981-03-12 | Process and apparatus for the surface extension and drying of leather pieces, skins and similar materials |
Country Status (17)
Country | Link |
---|---|
US (1) | US4438570A (en) |
EP (1) | EP0036183B1 (en) |
JP (1) | JPS56166300A (en) |
AT (1) | ATE10209T1 (en) |
BR (1) | BR8101510A (en) |
CA (1) | CA1182655A (en) |
CS (1) | CS243458B2 (en) |
DD (1) | DD157203A5 (en) |
DE (1) | DE3010003C2 (en) |
ES (1) | ES500271A0 (en) |
FI (1) | FI66906C (en) |
IT (1) | IT1136814B (en) |
MX (1) | MX155060A (en) |
NO (1) | NO159293C (en) |
SU (1) | SU1264843A3 (en) |
UA (1) | UA5918A1 (en) |
YU (1) | YU42385B (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1985003309A1 (en) * | 1984-01-25 | 1985-08-01 | Viljanmaa Leena | Method of and apparatus for tentering a hide |
FR2602795A1 (en) * | 1986-08-18 | 1988-02-19 | Mercier Freres | Process for stretching and preglazing a skin or a wet leather and preglazer-stretcher making use thereof |
WO1990003448A1 (en) * | 1988-09-29 | 1990-04-05 | Jiri Dokoupil | A process and device for stretching leather |
WO1990005196A1 (en) * | 1988-11-11 | 1990-05-17 | Joachim Spahrmann | Device for drying leather and the like |
WO1991002821A1 (en) * | 1989-08-25 | 1991-03-07 | Dynavac Maschinenbau Gmbh | Process and device for processing flat pieces of soft, flexible material |
US5291759A (en) * | 1988-09-29 | 1994-03-08 | Jiri Dokoupil | Process and equipment for stretching of leather |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4477981A (en) * | 1983-06-10 | 1984-10-23 | Royal E. Bright | Dynamic drying simulator |
NL8500151A (en) * | 1985-01-22 | 1986-08-18 | Skf Ind Trading & Dev | DEVICE FOR GENERATING A BI-AXIAL VOLTAGE CONDITION. |
US4767584A (en) * | 1985-04-03 | 1988-08-30 | Massachusetts Institute Of Technology | Process of and apparatus for producing design patterns in materials |
DE3521061A1 (en) * | 1985-06-12 | 1986-12-18 | Dokoupil, Jiří, Dipl-Ing., 6251 Gückingen | METHOD AND DEVICE FOR CONDITIONING LEATHER, FURS, FURS AND THE LIKE. |
US5096553A (en) * | 1986-09-11 | 1992-03-17 | Ionizing Energy Company Of Canada Limited | Treatment of raw animal hides and skins |
US4935083A (en) * | 1988-09-21 | 1990-06-19 | Massachusetts Inst Technology | Process for producing design patterns on materials |
DE3915042A1 (en) * | 1989-05-08 | 1990-11-15 | Dokoupil Jiri | METHOD AND DEVICE FOR MACHINING SOFT-FLEXIBLE FLAT MATERIAL PIECES |
DE4131262A1 (en) * | 1991-09-20 | 1993-04-01 | Dokoupil Jiri | Elastic membrane stretching and drying leather - extracts water vapour by vacuum via. channel network in surface |
AUPM761094A0 (en) * | 1994-08-23 | 1994-09-15 | Tanning Technologies Pty Ltd | Treatment of hides |
DE19608094A1 (en) * | 1996-03-02 | 1997-09-04 | Dokoupilova Magdalena | Quickly replaceable membrane for vacuum stretching and drying machines for leather |
US6038785A (en) * | 1998-01-16 | 2000-03-21 | Lawson; Richard R. | Vacuum drying screen |
DE19826181A1 (en) * | 1998-06-14 | 1999-12-16 | Bohumil Stupecky | Device for silting, stretching and drying leather and similar flat materials such as furs, furs and the like. the like |
ITVI980127A1 (en) * | 1998-06-29 | 1999-12-29 | Cartigliano Off Spa | HIGH BALANCED VACUUM DRYING PLANT FOR INDUSTRIAL LEATHER AND SIMILAR PRODUCTS |
CH694463A5 (en) * | 1999-12-10 | 2005-01-31 | Mario Ciucani | Procedure and installation for the treatment of animal skins. |
US6786067B2 (en) * | 2001-03-09 | 2004-09-07 | Bohumil Stupecky | Device for the slicking, stretching and drying of leather or similar flat materials such as hides, skins and the like |
ITVI20010220A1 (en) * | 2001-10-23 | 2003-04-23 | Cartigliano Off Spa | METHOD AND LINE FOR CONTINUOUS ENLARGEMENT OF LEATHER AND OTHER SIMILAR PRODUCTS |
ITVI20020050A1 (en) * | 2002-03-20 | 2003-09-22 | Cartigliano Off Spa | METHOD AND SYSTEM FOR CONTINUOUS WIDING AND GRADUAL DRYING OF INDUSTRIAL LEATHER AND SIMILAR PRODUCTS |
US8543365B1 (en) | 2004-10-25 | 2013-09-24 | Novatorque, Inc. | Computer-readable medium, a method and an apparatus for designing and simulating electrodynamic machines implementing conical and cylindrical magnets |
CN102839231B (en) * | 2012-09-05 | 2015-04-29 | 叶壮林 | Toggling connection structure for leather toggling dryer |
CN104865120B (en) * | 2015-06-01 | 2018-07-06 | 东莞市闻誉实业有限公司 | For the sheet metal fatigue tester of LED radiator |
CN104931347B (en) * | 2015-06-01 | 2018-02-02 | 东莞市闻誉实业有限公司 | The multi tension test machine of thin material in being adornd for LED |
CN104865125B (en) * | 2015-06-01 | 2017-09-01 | 东莞市闻誉实业有限公司 | For thin material dynamic characteristic test apparatus in LED decorations |
US20170051366A1 (en) * | 2015-08-17 | 2017-02-23 | Eikon Technologies Holding S.À.R.L. | Pelt board for drying tubular pelts |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB138930A (en) * | 1919-02-13 | 1920-09-09 | Erberto Durio | Improved process of and apparatus for stretching skins or the like |
US1740434A (en) * | 1927-05-12 | 1929-12-17 | Harding Engineering Company | Slicking machine |
US2125223A (en) * | 1937-01-23 | 1938-07-26 | Johnson Belting Company | Method of and machine for stretching leather |
US2661543A (en) * | 1950-06-24 | 1953-12-08 | United Shoe Machinery Corp | Apparatus for and methods of drying leather |
FR2267268A1 (en) * | 1974-04-12 | 1975-11-07 | Leonardi Angelo | Conveyor for tensioned separate sheets esp. animal skins - eliminates tensioning frames and facilitates continuous precessing, partic. drying |
Family Cites Families (5)
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CH328529A (en) * | 1955-01-03 | 1958-03-15 | Hans Neuner Lederfabrik Klagen | Tension frame for leather |
DE1435309A1 (en) * | 1960-11-18 | 1968-11-28 | Luigi Turato | Device for drying and smoothing leather |
US3224109A (en) * | 1962-02-09 | 1965-12-21 | Cartigliano Off Spa | Apparatus for the vacuum-drying of leather |
GB1150155A (en) * | 1965-08-25 | 1969-04-30 | Schlageter Bayerische Maschf | Improvements in Machines for Processing Leather or like Sheet Material. |
CH609442A5 (en) * | 1976-09-06 | 1979-02-28 | Patpan Inc | Apparatus for drying under vacuum flat objects, in particular large-sized skins and leathers |
-
1980
- 1980-03-15 DE DE3010003A patent/DE3010003C2/en not_active Expired
-
1981
- 1981-03-09 NO NO810783A patent/NO159293C/en unknown
- 1981-03-09 CS CS811723A patent/CS243458B2/en unknown
- 1981-03-11 ES ES500271A patent/ES500271A0/en active Granted
- 1981-03-12 YU YU638/81A patent/YU42385B/en unknown
- 1981-03-12 AT AT81101832T patent/ATE10209T1/en not_active IP Right Cessation
- 1981-03-12 EP EP81101832A patent/EP0036183B1/en not_active Expired
- 1981-03-13 BR BR8101510A patent/BR8101510A/en not_active IP Right Cessation
- 1981-03-13 UA UA3261930A patent/UA5918A1/en unknown
- 1981-03-13 US US06/241,543 patent/US4438570A/en not_active Expired - Lifetime
- 1981-03-13 FI FI810791A patent/FI66906C/en not_active IP Right Cessation
- 1981-03-13 SU SU813261930A patent/SU1264843A3/en active
- 1981-03-13 IT IT20336/81A patent/IT1136814B/en active
- 1981-03-13 DD DD81228286A patent/DD157203A5/en not_active IP Right Cessation
- 1981-03-16 MX MX186387A patent/MX155060A/en unknown
- 1981-03-16 CA CA000373089A patent/CA1182655A/en not_active Expired
- 1981-03-16 JP JP3668281A patent/JPS56166300A/en active Granted
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB138930A (en) * | 1919-02-13 | 1920-09-09 | Erberto Durio | Improved process of and apparatus for stretching skins or the like |
US1740434A (en) * | 1927-05-12 | 1929-12-17 | Harding Engineering Company | Slicking machine |
US2125223A (en) * | 1937-01-23 | 1938-07-26 | Johnson Belting Company | Method of and machine for stretching leather |
US2661543A (en) * | 1950-06-24 | 1953-12-08 | United Shoe Machinery Corp | Apparatus for and methods of drying leather |
FR2267268A1 (en) * | 1974-04-12 | 1975-11-07 | Leonardi Angelo | Conveyor for tensioned separate sheets esp. animal skins - eliminates tensioning frames and facilitates continuous precessing, partic. drying |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1985003309A1 (en) * | 1984-01-25 | 1985-08-01 | Viljanmaa Leena | Method of and apparatus for tentering a hide |
FR2602795A1 (en) * | 1986-08-18 | 1988-02-19 | Mercier Freres | Process for stretching and preglazing a skin or a wet leather and preglazer-stretcher making use thereof |
WO1990003448A1 (en) * | 1988-09-29 | 1990-04-05 | Jiri Dokoupil | A process and device for stretching leather |
EP0365068A1 (en) * | 1988-09-29 | 1990-04-25 | DOKOUPIL, Jiri | Process and apparatus for stretching leather |
US5291759A (en) * | 1988-09-29 | 1994-03-08 | Jiri Dokoupil | Process and equipment for stretching of leather |
WO1990005196A1 (en) * | 1988-11-11 | 1990-05-17 | Joachim Spahrmann | Device for drying leather and the like |
WO1991002821A1 (en) * | 1989-08-25 | 1991-03-07 | Dynavac Maschinenbau Gmbh | Process and device for processing flat pieces of soft, flexible material |
Also Published As
Publication number | Publication date |
---|---|
ES8205511A1 (en) | 1982-07-01 |
EP0036183B1 (en) | 1984-11-07 |
DE3010003C2 (en) | 1986-02-13 |
YU42385B (en) | 1988-08-31 |
JPS6121600B2 (en) | 1986-05-28 |
NO810783L (en) | 1981-09-16 |
SU1264843A3 (en) | 1986-10-15 |
UA5918A1 (en) | 1994-12-29 |
EP0036183A3 (en) | 1982-07-14 |
US4438570A (en) | 1984-03-27 |
FI66906C (en) | 1984-12-10 |
FI810791L (en) | 1981-09-16 |
IT1136814B (en) | 1986-09-03 |
DE3010003A1 (en) | 1981-09-24 |
BR8101510A (en) | 1981-09-15 |
CS243458B2 (en) | 1986-06-12 |
NO159293C (en) | 1988-12-14 |
YU63881A (en) | 1983-10-31 |
ATE10209T1 (en) | 1984-11-15 |
CA1182655A (en) | 1985-02-19 |
ES500271A0 (en) | 1982-07-01 |
NO159293B (en) | 1988-09-05 |
DD157203A5 (en) | 1982-10-20 |
FI66906B (en) | 1984-08-31 |
JPS56166300A (en) | 1981-12-21 |
MX155060A (en) | 1988-01-22 |
IT8120336A0 (en) | 1981-03-13 |
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