EP0171099A1 - Verfahren zur Herstellung von dekorierten Platten, insbesondere für Lampenschirme oder Leuchtornamente und nach diesem Verfahren hergestellte Platten - Google Patents

Verfahren zur Herstellung von dekorierten Platten, insbesondere für Lampenschirme oder Leuchtornamente und nach diesem Verfahren hergestellte Platten Download PDF

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Publication number
EP0171099A1
EP0171099A1 EP85201040A EP85201040A EP0171099A1 EP 0171099 A1 EP0171099 A1 EP 0171099A1 EP 85201040 A EP85201040 A EP 85201040A EP 85201040 A EP85201040 A EP 85201040A EP 0171099 A1 EP0171099 A1 EP 0171099A1
Authority
EP
European Patent Office
Prior art keywords
metallic
plate
reticulation
zones
copper
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.)
Withdrawn
Application number
EP85201040A
Other languages
English (en)
French (fr)
Inventor
William Reina
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.)
Strano Giovanbattista
Original Assignee
Strano Giovanbattista
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 Strano Giovanbattista filed Critical Strano Giovanbattista
Publication of EP0171099A1 publication Critical patent/EP0171099A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V1/00—Shades for light sources, i.e. lampshades for table, floor, wall or ceiling lamps
    • F21V1/26—Manufacturing shades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V1/00—Shades for light sources, i.e. lampshades for table, floor, wall or ceiling lamps
    • F21V1/14—Covers for frames; Frameless shades
    • F21V1/16—Covers for frames; Frameless shades characterised by the material

Definitions

  • Lampshades are known of which the exposed surface is defined by the face of a metal sheet on which a finely perforated design is formed- by any suitable incision method, preferably by chemical etching through the entire thickness of the sheet. At least one sheet of diaphanous material is fixed intimately and uniformly, by adhesives or any other suitable method, on to that side of the metal sheet which faces the light source.
  • the diaphanous part of the composite material can be in the form of one or more layers of cellulose paper which is sulphurised, bleached and soaked in phenolic resins, while the metal layer can be of copper or aluminium.
  • the exposed side of the incised metal surface can be protected by a varnish which can also extend over the diaphanous zones which have become exposed by the incisions in the metal surface.
  • a protective varnish providing a smooth surface can be applied to the inner face of the decorated plate, namely that facing the light source.
  • the diaphanous material part is an epoxy resin layer, and the metal layer can be of copper, tin or steel.
  • An additional coloured layer can be provided between the said metal layer and resin layer or on that side of this latter layer which faces the light source.
  • filling layers for example of a translucent or transparent colour, can be applied to the exposed cavities obtained by incising the metal layer, they being applied to either all the cavities or selectively.
  • the metal surface decorated by incision can be electroplated, for example gold-plated.
  • French patent 2,181,252 is equivalent to the other aforesaid French patent.
  • the methods described in all of these patents do not enable decorated plates to be formed which are of pleasant appearance when viewed on both their.faces, as normally happens in the case of a lampshade, or able to withstand the high temperatures deriving from lighting lamps, or able to withstand bending stresses if formed into curved plates.
  • the colouring method described in the said German patent cannot be implemented by industrial procedures, for example by silk-screen printing, and does not enable the aforesaid object of giving the decorated plate a pleasant appearance on both its faces to be attained.
  • the most suitable material is that indicated in French patent 2,531,011 (Thomson) which describes the formation of decorated plates for lampshades or the like composed of a layer of glass fibre mixed with epoxy resin, and a thin copper layer which is incised for decorating purposes by chemical removal.
  • This material is of the same type as that which is currently used in different thicknesses for making electronic printed circuits.
  • This patent however also does not go beyond summary instructions on the decorative incision of the copper layer by a chemical method, and states that the thickness of the diaphanous layer lies between 0.1 and 0.2 mm, this not being suitable for the objects of the invention.
  • the object of the present invention is to create a decorative plate of the aforesaid type, particularly for constructing lampshades, which has both its sides in the form of a reticulated metal decoration, of which the voids are occupied by a variously decorated diaphanous sheet.
  • the invention therefore proposes a method for forming decorated plates for lampshades or for luminous ornaments, characterised by not only being finely incised but also finely decorated by methods which can be implemented on an industrial scale and such that the plates are practically identical when viewed on both their sides.
  • a further object of the invention is to form decorated plates resistant to heat and to mechanical bending stresses, and which do not degrade under the action of light or chemical agents.
  • a further object of the invention is to enable each decorated plate to be reproduced in an unlimited number of copies, always with precision and reproductive accuracy and at low cost.
  • a for example transparent film is superposed on the positive used for forming the design of Figure 1, the positive is reversed, and an opaque ink is used to firstly mark the reference signs A-A' and C-C'-C" on said film, after which those clear zones of the underlying design which are to receive one and the same colour are darkened.
  • These masks can be prepared by a photomechanical method using lithography techniques with the required silk-screen modifications, or alternatively they can be prepared manually and with a certain rapidity, in that high accuracy is not required in darkening said zones because, for the reasons given hereinafter, the darkening can also partly extend on to the underlying dark zones of the positive.
  • the darkened zones of the masks of Figures 2, 3 and 4 are intended to receive, for example, the three basic colours according to trichromatic theory.
  • account will be taken of the fact that one and the same zone can receive more than one main colour in order to obtain a derived colour.
  • account will be taken of the fact that the colouring ban be either line or reticular.
  • the masks Ml, M2 and M3 are used to construct three silk-screen frames which are permeable to ink in the part corresponding to the dark zones of the masks.
  • the reference signs A-A' which exist both on the plate and on the frame, the different colours are applied in the correct succession to the plate, and will also be visible by transparency on the front face of the plate through the diaphanous zones which are not covered by the copper decoration CU.
  • the colouring is done preferably using light, transparent dyes suitable for polychrome silk-screen processes and which bond to the glass reinforced plastic on which they are deposited.
  • a silk-screen frame is constructed using the (reversed) positive employed for obtaining the design of Figure 1, so that said frame is permeable to ink at the dark zones of said positive.
  • a metal pigmentation covering ink is applied to the rear face of the plate, this ink reproducing as closely as possible the colour which the incised metallic face CU of the product will have on termination of the cycle. If this face is to be of gold colour, the said covering ink will be of rich gold colour.
  • the decoration formed from the said covering ink will mirror the front metallic decoration on the product and will be extremely accurate by virtue of the fact that the relative silk-screen frame has been formed from an extremely accurate positive, it thus performing two functions, namely to reproduce on the glass reinforced plastic surface a design equal to the external metal design and of very similar colour, and to cover any perimetral irregularities of the zones of different colour formed in the previous stages, thus providing boundary regularity between said zones.
  • the plate is subjected to heat treatment necessary for fixing the decoration. In this stage, temperatures of the order of 60°C can be reached for times of a few minutes.
  • the plate is prepared for the subsequent stages.
  • the incised metallic surface is firstly perfectly cleaned and made bright or satiny according to appearance requirements.
  • the plate is then electroplated to coat the incised metal surface, usually by gold-plating.
  • This stage makes use of the strips S-S' of Figure 1, to which the electrodes of the electroplating plant are connected, so that the entire incised metallic design is uniformly treated, by being protected from direct contact with said electrodes.
  • This also means that the rear metallic pigmentation decoration.described heretofore is perfectly isolated from the electric current circuit and thus remains in its original condition. If it were to be exposed to electrolytic action, this decoration could become damaged.
  • the design formed on the metal surface CU must be composed of sign-like fragments which are all linked together so as to be able to be reached by the electric current. Again for this purpose, as shown in Figure 1, it is preferable for the design to be bounded by a continuous line of suitable width, which is useful as a collector for the electric current.
  • the strips S-S' are preferably covered with a suitable varnish so as to be protected from gold plating.
  • the plate is cleaned and the gold-plated metal surface is protected by a transparent varnish which also extends to the diaphanous zones of the plate and is fixed by suitable heat treatment.
  • holes are formed through the plate at the circles C-C'-C" so as to be able to correctly position the decorated and coloured part of the plate on the centering pins provided on the shearing equipment which is used to remove the decorated and coloured piece from the plate.
  • Other methods can be used instead of shearing, for example cutting by laser beam.
  • suitably distributed perimetral holes F are provided in the decorated and coloured piece in the correct number for fixing the piece to other equal pieces or to interposed structures for support and shaping purposes if said pieces are to be kept in a flexed state.
  • Figures 5 and 6 show a piece different from that of Figures 1 to 4 but decorated and coloured by the aforesaid method, the figures showing the metal face and the glass reinforced plastic face respectively.
  • the reference letter R indicates the line formation made by the metallic pigmentation covering ink.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Laminated Bodies (AREA)
EP85201040A 1984-07-06 1985-06-28 Verfahren zur Herstellung von dekorierten Platten, insbesondere für Lampenschirme oder Leuchtornamente und nach diesem Verfahren hergestellte Platten Withdrawn EP0171099A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1255884 1984-07-06
IT8412558A IT8412558A0 (it) 1984-07-06 1984-07-06 Procedimento per la fabbricazione di paralumi o di ornamenti luminosi e prodotti realizzati con tale procedimento

Publications (1)

Publication Number Publication Date
EP0171099A1 true EP0171099A1 (de) 1986-02-12

Family

ID=11141581

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85201040A Withdrawn EP0171099A1 (de) 1984-07-06 1985-06-28 Verfahren zur Herstellung von dekorierten Platten, insbesondere für Lampenschirme oder Leuchtornamente und nach diesem Verfahren hergestellte Platten

Country Status (3)

Country Link
EP (1) EP0171099A1 (de)
JP (1) JPS6131300A (de)
IT (1) IT8412558A0 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110000441A (zh) * 2018-08-01 2019-07-12 卓见 一种水冷旋压内焊铜包镶多面体器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4917477A (en) * 1987-04-06 1990-04-17 Gentex Corporation Automatic rearview mirror system for automotive vehicles

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2505183A1 (de) * 1975-02-07 1976-08-19 Schneider & Kern Ornamentales, etwa plattenfoermiges gebilde

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2505183A1 (de) * 1975-02-07 1976-08-19 Schneider & Kern Ornamentales, etwa plattenfoermiges gebilde

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110000441A (zh) * 2018-08-01 2019-07-12 卓见 一种水冷旋压内焊铜包镶多面体器

Also Published As

Publication number Publication date
IT8412558A0 (it) 1984-07-06
JPS6131300A (ja) 1986-02-13

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): AT CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19860527

STAA Information on the status of an ep patent application or granted ep patent

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18W Application withdrawn

Withdrawal date: 19870331

RIN1 Information on inventor provided before grant (corrected)

Inventor name: REINA, WILLIAM