EP0131182B1 - Apparatus for applying liquid substances over sheet-like elements, such as cloths, hides, and the like - Google Patents

Apparatus for applying liquid substances over sheet-like elements, such as cloths, hides, and the like Download PDF

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Publication number
EP0131182B1
EP0131182B1 EP84107009A EP84107009A EP0131182B1 EP 0131182 B1 EP0131182 B1 EP 0131182B1 EP 84107009 A EP84107009 A EP 84107009A EP 84107009 A EP84107009 A EP 84107009A EP 0131182 B1 EP0131182 B1 EP 0131182B1
Authority
EP
European Patent Office
Prior art keywords
elements
hides
surface portions
cloths
liquid substances
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
Application number
EP84107009A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0131182A1 (en
Inventor
Luigi Pecis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pcm Progettazione Costruzione Macchine Di Luigi Pecis & C SNC
Original Assignee
Pcm Progettazione Costruzione Macchine Di Luigi Pecis & C SNC
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 Pcm Progettazione Costruzione Macchine Di Luigi Pecis & C SNC filed Critical Pcm Progettazione Costruzione Macchine Di Luigi Pecis & C SNC
Publication of EP0131182A1 publication Critical patent/EP0131182A1/en
Application granted granted Critical
Publication of EP0131182B1 publication Critical patent/EP0131182B1/en
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B1/00—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating
    • D06B1/02—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating by spraying or projecting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/08—Plant for applying liquids or other fluent materials to objects
    • B05B5/14—Plant for applying liquids or other fluent materials to objects specially adapted for coating continuously moving elongated bodies, e.g. wires, strips, pipes
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/08—Plant for applying liquids or other fluent materials to objects
    • B05B5/082—Plant for applying liquids or other fluent materials to objects characterised by means for supporting, holding or conveying the objects
    • B05B5/084—Plant for applying liquids or other fluent materials to objects characterised by means for supporting, holding or conveying the objects the objects lying on, or being supported above conveying means, e.g. conveyor belts

Definitions

  • This invention relates to an apparatus for applying liquid substances over sheet-like elements, such as cloths, hides, and the like.
  • the coating product is caused to flow into a bell or cone rotated at a high speed and subjected to a high electrostatic potential by some suitable means. Under the combined effects of centrifugal force and of the electrostatic field, the coating product or the like is atomized into very fine electrified particles which deposit themselves over any electrically conductive ground-connected objects which happen to be in front of the atomizer.
  • DE-A-2 054 752 is an apparatus for spraying powder onto an endless, constant width, non-conductive film, wherein an electric field is established in front of an atomizer by placing a backing electrode, connected to earth, behind the film to be sprayed.
  • This invention is directed to provide an apparatus which can allow application of such liquid substances as adhesives, paints, etc. by an electrostatic process over sheet elements which are not inherently electrically conductive.
  • a further object of the invention is to provide an apparatus which, owing to its peculiar construction, can give full assurance of being reliable and safe to use.
  • an apparatus for applying liquid substances to flat elements (30) such as cloths, hides and the like
  • fluid dispensing means (1) connected to an electrostatic generator (4) and adapted for dispensing said liquid substance in the form of atomized and electrified particles onto said elements (30), and an electrically grounded conductive surface (10), spaced from said fluid dispensing means (1) and adapted for supporting said element (30) whereon said liquid substance is applied (features disclosed in DE-A-2 054 752), characterized in that said conductive surface (10) comprises a plurality of conductive surface portions electrically insulated from each other and means for selectively connecting to ground said conductive surface portions.
  • an apparatus for applying liquid substances over sheet-like elements, such as cloths, hides, and the like comprises a dispenser 1 of a type known per se, which may comprise a rotary bell or cone atomizer, an electrostatic gun, a spray nozzle issuing a blade or band of the product or the like, and which is in communication, with the interposition of a feed pump 2, with a storage tank 3 containing a liquid substance to be supplied, which liquid substance may comprise water-dispersed liquid adhesives, paints, etc.
  • the dispenser 1 is electrically connected to an electrostatic generator 4, of a type known per se, which is adapted to allow the dispenser, as connected to a compressed air supply 5, to deliver atomized and electrified particles, a peculiar aspect of the apparatus residing in that, arranged to face the dispenser outlet end, is a preferably flat conductive surface 10 electrically grounded.
  • an electrostatic generator 4 of a type known per se, which is adapted to allow the dispenser, as connected to a compressed air supply 5, to deliver atomized and electrified particles, a peculiar aspect of the apparatus residing in that, arranged to face the dispenser outlet end, is a preferably flat conductive surface 10 electrically grounded.
  • the surface 10 serves as a backing member for a sheet element to be painted, which would be practically placed between the conductive surface 10 and dispenser 1.
  • the sheet element comprises a cloth material 20 extending continuously between a supply coil and receiving coil
  • the cloth in moving past the surface 10 behaves in practice as an electrically conductive element in view of the high voltages (30-100 kV) involved.
  • a conveyor belt or carpet 40 is provided which runs continuously with one portion of its upper run located above the cited conductive surface 10.
  • the belt or carpet 40 serves, in turn, as a supporting element for the sheet elements, which may comprise hides or the like, to establish a similar situation to the former, since owing to the small thickness involved versus the high voltages used, the sheet elements, such as hides and the like, while not being inherently conductive materials, can actually behave as such on account of the conductive metal surface 10 underlying them.
  • the apparatus employed is to detect the outlines of the oncoming pieces to only ground those areas of the conductive surface 10 which are affected by the piece; in this case, the conductive surface comprises conductive surface portions laid side-by-side and electrically insulated from one another which can be selectively connected to ground.
  • Such apparatus may comprise an optical or electric eye bar (not shown) having a light sensitive portion (optometric sensors) and a light (neon) source which can detect, on the basis of the blotted out optometric sensors, the outline of a piece moving past it, to transmit the information to an electronic unit for storing information from the bar.
  • the electronic unit controls, in accordance with the carpet advancement, which portions of the conductive surface are destined to be located under the piece and their grounding, to leave the remnant at a floating potential.
  • a carpet timing assembly can be also provided (not shown) comprising a gear wheel and a proximity sensor operative to supply a signal at each forward unit movement of the carpet and appropriately drive the electronic unit.
  • the invention achieves its objects, and in particular the fact should be emphasized that the apparatus of this invention, by utilising said conductive metal surface 10 both as a backing element and ground connection element, enables liquid substances to be applied over elements inherently non-conductive with the same techniques as are currently employed for the application of paints and the like over electrically conductive materials and parts.
  • an added important object of the invention is that liquid substances can be applied over non-conductive sheet elements to provide a uniform distribution of the product across the element, while product waste can be significantly reduced owing to the product being solely spread over the areas affected by the elements.
  • the supporting carpet for the sheet element to be painted may be formed from a material made electrically conductive by means of wires or a mesh, or the like, which would be grounded electrically, thereby the conductive plate 10 may be omitted altogether.
  • the materials used, as well as the dimensions and contingent shapes may be any suitable ones to fill individual requirements.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Electrostatic Spraying Apparatus (AREA)
EP84107009A 1983-06-28 1984-06-20 Apparatus for applying liquid substances over sheet-like elements, such as cloths, hides, and the like Expired EP0131182B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2182583 1983-06-28
IT21825/83A IT1163609B (it) 1983-06-28 1983-06-28 Apparecchiatura per l'applicazione di sostanze liquide su elementi lastriformi, quali tessuti, pelli e simili

Publications (2)

Publication Number Publication Date
EP0131182A1 EP0131182A1 (en) 1985-01-16
EP0131182B1 true EP0131182B1 (en) 1987-09-23

Family

ID=11187385

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84107009A Expired EP0131182B1 (en) 1983-06-28 1984-06-20 Apparatus for applying liquid substances over sheet-like elements, such as cloths, hides, and the like

Country Status (6)

Country Link
EP (1) EP0131182B1 (it)
BR (1) BR8403139A (it)
DE (1) DE3466357D1 (it)
ES (1) ES533713A0 (it)
FI (1) FI842462A (it)
IT (1) IT1163609B (it)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3611729A1 (de) * 1986-04-08 1987-10-15 Ransburg Gmbh Fluessigkeitssprueheinrichtung zum bespruehen von leder
DE3823739A1 (de) * 1988-07-13 1990-01-18 Eltex Elektrostatik Gmbh Vorrichtung zum befeuchten eines bewegten substrates
FR2657794A1 (fr) * 1990-02-06 1991-08-09 De Mouveaux Pierre Dispositif pour rendre homogene, regulier et controlable le depot electrostatique de liquides ou de poudres sur des substrats non mis a la masse d'un generateur de haute tension.
GB9809265D0 (en) * 1998-05-01 1998-07-01 Central Research Lab Ltd Apparatus for locating a plurality of articles
US6376024B1 (en) 1999-05-28 2002-04-23 Hurletron, Incorporated Web processing with electrostatic cooling
JP3825588B2 (ja) * 1999-08-23 2006-09-27 住友商事株式会社 静電植毛装置、静電塗装装置に配する静電加工室
US6299685B1 (en) 2000-02-11 2001-10-09 Hurletron, Incorporated Web processing with electrostatic moistening
GB0215480D0 (en) * 2002-07-04 2002-08-14 Eurotec Finishing Systems Ltd Electrostatic powder coating method and apparatus
ES2314145T3 (es) * 2002-08-07 2009-03-16 Cefla Societa' Cooperativa Equipo parapreparar articulos tridimensionales con una extension plana predominante para su pintado electrostatico.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2054752A1 (de) * 1969-11-07 1971-05-13 Tunzini Sames, Grenoble (Frankreich) Verfahren und Fertigungsanlage zur Herstellung einer klebfahigen Papierbahn

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3484275A (en) * 1965-05-17 1969-12-16 Scott Paper Co Electrostatic deposition of compositions on sheet materials utilizing pre-existing friction induced electrostatic charges on said sheet materials
FR2033180A1 (it) * 1969-02-27 1970-12-04 Flockage Ste Nle
DE2546025C3 (de) * 1975-10-14 1980-11-20 Roeth + Co, 6700 Ludwigshafen Vorrichtung zum elektrostatischen Besprühen von fortlaufend transportierten Bahnen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2054752A1 (de) * 1969-11-07 1971-05-13 Tunzini Sames, Grenoble (Frankreich) Verfahren und Fertigungsanlage zur Herstellung einer klebfahigen Papierbahn

Also Published As

Publication number Publication date
BR8403139A (pt) 1985-06-11
ES8503973A1 (es) 1985-05-01
FI842462A (fi) 1984-12-29
DE3466357D1 (en) 1987-10-29
IT8321825A0 (it) 1983-06-28
FI842462A0 (fi) 1984-06-19
ES533713A0 (es) 1985-05-01
EP0131182A1 (en) 1985-01-16
IT1163609B (it) 1987-04-08
IT8321825A1 (it) 1984-12-28

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