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ITMI930407U1 - EQUIPMENT FOR THE CLASSIFICATION OF LEATHER DEFECTS - Google Patents

EQUIPMENT FOR THE CLASSIFICATION OF LEATHER DEFECTS

Info

Publication number
ITMI930407U1
ITMI930407U1 IT93MI000407U ITMI930407U ITMI930407U1 IT MI930407 U1 ITMI930407 U1 IT MI930407U1 IT 93MI000407 U IT93MI000407 U IT 93MI000407U IT MI930407 U ITMI930407 U IT MI930407U IT MI930407 U1 ITMI930407 U1 IT MI930407U1
Authority
IT
Italy
Prior art keywords
defects
tanning
leather
classification
sorting
Prior art date
Application number
IT93MI000407U
Other languages
Italian (it)
Inventor
Franz Lutz Dittmann
Franz Josef Steger
Original Assignee
Diel Gmbh & Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Diel Gmbh & Co filed Critical Diel Gmbh & Co
Publication of ITMI930407V0 publication Critical patent/ITMI930407V0/en
Publication of ITMI930407U1 publication Critical patent/ITMI930407U1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34—Sorting according to other particular properties
    • B07C5/342—Sorting according to other particular properties according to optical properties, e.g. colour
    • 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
    • C14B1/28—Machines for treating leather combined with devices for measuring and printing
    • 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
    • C14B17/005—Inspecting hides or furs
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/44—Resins; Plastics; Rubber; Leather
    • G01N33/447—Leather

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Manufacturing & Machinery (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Organic Chemistry (AREA)
  • Pathology (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Medicinal Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Textile Engineering (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

Deve essere indicata un'apparecchiatura (10) per la classificazione di difetti (14) in pelli (12), che consenta la cernita automatica, ad uno stadio di concia del cuoio il più precoce possibile, di determinati livelli qualitativi in funzione dei difetti, onde evitare fasi di concia costose per qualità inferiori, senza dipendere per tale decisione da controlli visivi soggettivi difficilmente riproducibili. A tale scopo la pelle (12), già spaccata, sottoposta ad una prima concia e ben distesa, viene trascinata, con avanzamento predefinito, attraverso un'apparecchiatura (23) di irradiazione, ove viene irradiata con una lama di luce infrarossa ad onde lunghe sul lato della grana, ovvero attraversata dalla luce sul lato carne, in modo da registrare righe successive trasversali alla direzione (18) di avanzamento della proiezione d'ombra dipendente dai difetti, ovvero dell'attenuazione della luce passante dipendente dai difetti e dalla struttura, mediante funzionamento stroboscopico elettrico o meccanico. Una realizzazione economica utilizza lampade al quarzo a radiazione termica, e telecamere CCD di consumo, queste ultime previa asportazione del filtro per infrarosso normalmente incorporato, comunemente reperibile in commercio. Mediante un sistema esperto, addestrato per riconoscere i vari difetti tipici ed integrato in una rete neuronale, i difetti (14), rappresentati da oscillazioni di intensità, vengono convertiti, in un'apparecchiatura (30) di valutazione, tenendo conto della loro grandezza, posizione e numero, in informazioni (33) di classificazione, che, mediante un apparecchio (32) marcatore, vengono marcate sulla pelle (12) e possono servire per il comando di un impianto (34) di cernita, per un ordinamento classificato della pelle (12).(Figura 3).An apparatus (10) for the classification of defects (14) in hides (12) must be indicated, which allows the automatic sorting, at an early tanning stage of the leather, of certain quality levels according to the defects, in order to avoid expensive tanning stages for inferior qualities, without depending for this decision on subjective visual checks which are difficult to reproduce. For this purpose, the leather (12), already split, subjected to a first tanning and well stretched, is dragged, with predefined feed, through an irradiation apparatus (23), where it is irradiated with a long wave infrared light blade on the grain side, i.e. crossed by the light on the flesh side, so as to record successive lines transverse to the direction (18) of progress of the shadow projection dependent on the defects, or of the attenuation of the passing light dependent on the defects and the structure, by electric or mechanical stroboscopic operation. An economic realization uses quartz lamps with thermal radiation, and consumer CCD cameras, the latter after removing the normally incorporated infrared filter, commonly available on the market. By means of an expert system, trained to recognize the various typical defects and integrated in a neuronal network, the defects (14), represented by intensity oscillations, are converted into an evaluation device (30), taking into account their size, position and number, in classification information (33), which, by means of a marker device (32), are marked on the skin (12) and can be used to control a sorting plant (34), for a classified sorting of the skin (12). (Figure 3).

IT93MI000407U 1992-05-19 1993-05-14 EQUIPMENT FOR THE CLASSIFICATION OF LEATHER DEFECTS ITMI930407U1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4216469A DE4216469A1 (en) 1992-05-19 1992-05-19 Defect classification system for skin to be used to make leather - analyses infrared radiation distribution transmitted through tanned stretched skin in wet-blue state and passed between heat-radiating quartz lamps and CCD or line camera.

Publications (2)

Publication Number Publication Date
ITMI930407V0 ITMI930407V0 (en) 1993-05-14
ITMI930407U1 true ITMI930407U1 (en) 1993-11-19

Family

ID=6459202

Family Applications (2)

Application Number Title Priority Date Filing Date
IT93MI000995A IT1264457B1 (en) 1992-05-19 1993-05-14 EQUIPMENT FOR THE CLASSIFICATION OF DEFECTS IN LEATHER
IT93MI000407U ITMI930407U1 (en) 1992-05-19 1993-05-14 EQUIPMENT FOR THE CLASSIFICATION OF LEATHER DEFECTS

Family Applications Before (1)

Application Number Title Priority Date Filing Date
IT93MI000995A IT1264457B1 (en) 1992-05-19 1993-05-14 EQUIPMENT FOR THE CLASSIFICATION OF DEFECTS IN LEATHER

Country Status (2)

Country Link
DE (1) DE4216469A1 (en)
IT (2) IT1264457B1 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU734329B2 (en) * 1996-02-09 2001-06-07 Unisearch Limited Visual inspection system for leather hide
AUPN800796A0 (en) * 1996-02-09 1996-03-07 Unisearch Limited Visual inspection system for leather hide
DE19824304A1 (en) * 1998-05-28 1999-12-02 Maass Ruth Apparatus for classifying pieces of leather, having a camera to scan the leather on a digitizing bed and a computer to evaluate the data
DE19944394C2 (en) * 1999-09-16 2001-10-18 Manfred Luetz Process and device for the optimal utilization of semi-finished leather products
DE10121594A1 (en) * 2001-05-03 2002-11-07 Kannegiesser H Gmbh Co Fabric quality control spreads fabric over a transparent drum, with an inner light source, and a line camera to register the light passing through and detect holes and other faults
DE10211293A1 (en) * 2002-03-14 2003-09-25 Basf Ag Process for automated surface control and surface correction
FR2864668B1 (en) * 2003-12-26 2006-05-26 Ct Tech Cuir Chaussure Maroqui DEFECT CARTOGRAPHY METHOD ON A LEATHER
WO2011030360A1 (en) * 2009-09-11 2011-03-17 Camoga S.P.A. Machine for automatic detection of flaws on pieces made of leather or similar material
AT509382B1 (en) 2010-01-18 2011-12-15 Wollsdorf Leder Schmidt & Co Gmbh TEST EQUIPMENT FOR DETERMINING THE QUALITY OF LEATHER
WO2012060726A1 (en) * 2010-11-04 2012-05-10 Couro Azul - Indústria E Comércio De Couros, Sa Process to detect defects in leather
CN104316540A (en) * 2014-09-22 2015-01-28 浙江西雅普康大制革有限公司 Pore alarm apparatus for synthetic leather processing
TWI721427B (en) * 2018-05-22 2021-03-11 荷蘭商耐克創新有限合夥公司 Leather inspection apparatus and method for detecting inconsistencies on both upper and lower surfaces of hide
CN111257332A (en) * 2020-01-20 2020-06-09 扬州哈工博视科技有限公司 Leather flaw detection machine
WO2021240279A1 (en) * 2020-05-29 2021-12-02 Conceria Pasubio S.P.A. Method and apparatus for identifying possible surface defects of a leather hide

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3120861A (en) * 1960-07-14 1964-02-11 Western Pine Ass Method and apparatus for identifying and evaluating surface characteristics of forest products
US3843890A (en) * 1973-07-27 1974-10-22 Du Pont Optical-electrical web inspection system
US4211132A (en) * 1977-11-21 1980-07-08 E. I. Du Pont De Nemours And Company Apparatus for on-line defect zoning
GB2055194B (en) * 1979-08-04 1983-07-27 Wilson & Sons Ltd Edward Skin categorising apparatus
DE3325125C1 (en) * 1983-07-12 1985-02-14 Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch Arrangement for marking defects on fast moving material webs
JPH0674112B2 (en) * 1986-04-23 1994-09-21 三菱重工業株式会社 Automatic sorting device for sheet paper
DE3639636C2 (en) * 1986-11-20 1996-04-18 Robert Prof Dr Ing Massen Automatic inspection of textile webs
FR2620229A1 (en) * 1987-09-03 1989-03-10 Aria Sarl Detection method, device and assembly for providing information to an optoelectronic detector and applications, in particular to cutting a skin
DD278409A1 (en) * 1988-12-20 1990-05-02 Schuh Design Veb METHOD FOR THE AUTOMATIC FLAKE DETECTION OF LEATHER SHOES
US5036190A (en) * 1990-02-05 1991-07-30 Opex Corporation Method and apparatus for candling envelopes

Also Published As

Publication number Publication date
IT1264457B1 (en) 1996-09-23
DE4216469A1 (en) 1993-11-25
ITMI930995A0 (en) 1993-05-14
ITMI930407V0 (en) 1993-05-14
ITMI930995A1 (en) 1994-11-14

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