EP0465311B1 - Vitrage en forme muni d'un réseau électrique - Google Patents

Vitrage en forme muni d'un réseau électrique Download PDF

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Publication number
EP0465311B1
EP0465311B1 EP91401748A EP91401748A EP0465311B1 EP 0465311 B1 EP0465311 B1 EP 0465311B1 EP 91401748 A EP91401748 A EP 91401748A EP 91401748 A EP91401748 A EP 91401748A EP 0465311 B1 EP0465311 B1 EP 0465311B1
Authority
EP
European Patent Office
Prior art keywords
strips
heating
collector
glass
pane 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
Application number
EP91401748A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0465311A1 (fr
Inventor
Jacques Polat
Eric Szuwalski
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.)
Saint Gobain Glass France SAS
Saint Gobain Vitrage SA
Original Assignee
Saint Gobain Vitrage SA
Saint Gobain Vitrage International SA
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 Saint Gobain Vitrage SA, Saint Gobain Vitrage International SA filed Critical Saint Gobain Vitrage SA
Publication of EP0465311A1 publication Critical patent/EP0465311A1/fr
Application granted granted Critical
Publication of EP0465311B1 publication Critical patent/EP0465311B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/84—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/016—Heaters using particular connecting means

Definitions

  • the invention relates to glazing in the form of a screen-printed electrical network providing the functions of defrosting and demisting, in particular glazing of the rear window type of a motor vehicle. More precisely, the subject of the invention is a glazing unit having a relatively pronounced curvature along its edges parallel to the collector strips towards which all the lines of the heating network converge and which are connected to the electric current leads.
  • Such glazing is obtained by depositing on the surface of a glass sheet a series of narrow resistance bands of an electroconductive composition. These resistance bands are screen printed flat on the glass sheet before bending, so that the electrically conductive composition is baked during the heating preceding the bending and tempering operation of the glazing.
  • the electroconductive composition is made of a pasty suspension, in an organic binder, of metallic silver and a frit, that is to say of a glass with low melting point.
  • the resistance bands forming the network are relatively thin so as not to obstruct visibility through the glazing and lead to wider collector strips therefore more conductive, located near the edges of the glazing.
  • These bands Collectors are made of a composition identical to that of the resistance bands and are deposited in the same way and preferably at the same time as these. The current leads are then welded to these collecting strips.
  • the glass sheet In view of its mounting on the vehicle by gluing, which supposes an opaque peripheral band masking the glue from external looks and protecting it from solar radiation, or quite simply for the sake of aesthetics, the glass sheet is moreover provided with the most often with a black enamel frame.
  • This is obtained by screen printing of a paste quite similar to silver paste but where the silver is replaced by suitable dyes.
  • the glazing therefore undergoes before its bending at least two screen printing passes, that corresponding to the deposition of the framing layer and after drying, that corresponding to the heating network, to which may be added a third screen printing pass intended to increase locally, for example in the welding zones of the current supply terminals and in general to adjust the thickness of the network and thereby its conductivity.
  • the glazing can then be taken to the bending / tempering installation where it is heated to bending temperature and shaped in a bending station.
  • the purpose here is not to expand on the manner in which this shaping is carried out, very numerous existing processes being well known to those skilled in the art. It may, however, be recalled that the most difficult shapes to produce - at least while respecting the most stringent optical quality standards - are those which have surfaces with a very small radius of curvature with fold lines located in the marginal areas of the glass sheet. However, these shapes are typically those required for the rear glasses of motor vehicles.
  • the critical zone is also the zone where most of the collector strips are concentrated.
  • these collecting strips are of a white or whitish color and therefore tend to reflect heat in a greater proportion than transparent glass and even much greater than the enamelled black bands which absorb the higher the heat and therefore heats up more significantly.
  • this critical area there are therefore both reflective and heat absorbing tapes.
  • This colored layer preferably consists of a new enamelled layer deposited by a third - or if necessary - fourth pass in screen printing.
  • this colored layer is black in color. This last choice is practically imposed, since the collecting strip is not placed directly on the glass but on the black enameled framing strip, the objective of course being to obtain strips which merge in their colors.
  • the covering of the collector strip is only partial and must leave at least the soldering zones of the terminals free.
  • the covered areas must be distributed according to the temperature profile corresponding to the form of glazing expected.
  • a given temperature profile in fact corresponds to a multiplicity of frames which will ultimately be selected according to the greater or lesser ease there is of depositing them by screen printing and as a last resort, according to their aesthetic character.
  • a frame depends not only on the shape to be given to the glazing, but also on its tint, a dark glass generally having a different behavior with regard to its heating than that of a clear glass.
  • Figure 1 is a very schematic representation of a rear window of a motor vehicle.
  • the telescope 1 is constituted by a sheet of glass, for example 3.2 mm thick, the central part 2 of which is slightly curved and the lateral wings 3, 4 of which are strongly folded around axes 5, 6 and also having a certain curvature as indicated in 7.
  • the entire periphery of the glazing is provided with a layer of black enamel 8 forming a frame. It can be a continuous or degraded layer, made for example of a succession of points more and more spaced as one approaches the central part 2.
  • a heating network consisting of thin conductive strips 9 made of a silver frit which all lead to larger collecting strips 10, arranged along two parallel edges. These silver bands are white. These collecting strips receive the current supply terminals which are welded.
  • the enamel layer 8 and the strips 9, 10 of the heating network are both essentially composed of a suspension in a binder of a glass with a low melting point or sintered. They are deposited by screen printing and must then be cooked. This cooking is carried out in the furnace for reheating the glass sheets before bending.
  • FIG. 2 illustrates a collecting strip coated with a series of black strips 11 which leave visible white stripes.
  • This blackening is effected by the deposition of a new layer of black enamel which masks the collecting strip.
  • the same composition can be used as for layer 8 or any other composition which may be less expensive, since this masking layer is not exposed to solar radiation (the heating network is always on the internal face of the telescope, this masking overlay is therefore behind layer 8).
  • This overlayer is deposited leaving a part of the collecting strip visible so as to constitute an alternation of dark zones and light zones, these zones being distributed so as to obtain the most suitable heating for the form of glazing which is desired after bending.
  • the colored layer is arranged so as to form alternating black or white lines, more or less long depending on their position on the glazing.
  • Other patterns for example of the grid type, dots, peas, split peas, according to a uniform or degraded distribution scheme can of course be envisaged taking into account the shape of the glazing and as a last resort the aesthetic appearance.
  • pattern testing is therefore necessary for each new type of glazing - knowing that a white area is cooler and therefore leads to the formation of a relatively flatter area, while a black area is warmer and leads to an area where the deformation is accentuated. It may also be noted that the pattern will preferably be different depending on whether the glass sheet is made of tinted glass or not. Once the pattern has been chosen, there is a perfectly repetitive bending due to a very well controlled heating profile and this in an extremely localized manner due to the precision of a deposition by screen printing.

Landscapes

  • Joining Of Glass To Other Materials (AREA)
  • Surface Treatment Of Glass (AREA)
  • Surface Heating Bodies (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Insulated Conductors (AREA)
  • Inorganic Insulating Materials (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Glass Compositions (AREA)
  • Laminated Bodies (AREA)
  • Catching Or Destruction (AREA)
  • Securing Of Glass Panes Or The Like (AREA)
EP91401748A 1990-07-02 1991-06-27 Vitrage en forme muni d'un réseau électrique Expired - Lifetime EP0465311B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9008314A FR2663885B1 (fr) 1990-07-02 1990-07-02 Vitrage en forme muni d'un reseau chauffant.
FR9008314 1990-07-02

Publications (2)

Publication Number Publication Date
EP0465311A1 EP0465311A1 (fr) 1992-01-08
EP0465311B1 true EP0465311B1 (fr) 1994-10-19

Family

ID=9398218

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91401748A Expired - Lifetime EP0465311B1 (fr) 1990-07-02 1991-06-27 Vitrage en forme muni d'un réseau électrique

Country Status (10)

Country Link
EP (1) EP0465311B1 (cs)
JP (1) JPH04229984A (cs)
KR (1) KR920003802A (cs)
AT (1) ATE113154T1 (cs)
CZ (1) CZ279460B6 (cs)
DE (1) DE69104655T2 (cs)
DK (1) DK0465311T3 (cs)
ES (1) ES2065637T3 (cs)
FR (1) FR2663885B1 (cs)
HU (1) HU214721B (cs)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2005105691A1 (ja) * 2004-04-28 2008-03-13 旭硝子株式会社 導電性プリントを有するガラス板およびその製造方法
KR100859159B1 (ko) * 2006-08-31 2008-09-19 한국세큐리트 주식회사 판유리
BE1020191A3 (fr) * 2011-08-12 2013-06-04 Agc Glass Europe Vitrage automobile avec motifs emailles.
EP3785489B1 (de) 2018-04-25 2023-08-02 Saint-Gobain Glass France Verfahren zum drucken einer strukturierten silberbeschichtung mit verbesserter stromtragfähigkeit
CN109515124A (zh) * 2018-11-12 2019-03-26 江麓机电集团有限公司 一种内嵌拦阻网的排气窗
CZ2018661A3 (cs) * 2018-11-30 2019-12-18 Thermo Glass.eu s.r.o. Topné bezpečnostní zasklení

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1464586A (fr) 1965-03-27 1967-01-06 Inst Francais Du Petrole Procédé permettant la combustion de mélanges globalement pauvres dans les moteurs à allumage commandé et dispositifs pour sa mise en oeuvre
GB2091529A (en) * 1981-01-14 1982-07-28 Boussois Sa Heatable Panels
DE3506891A1 (de) * 1985-02-27 1986-08-28 VEGLA Vereinigte Glaswerke GmbH, 5100 Aachen Verfahren zur herstellung einer beheizbaren glasscheibe und siebdruckschablone fuer die durchfuehrung des verfahrens

Also Published As

Publication number Publication date
CZ279460B6 (cs) 1995-05-17
JPH04229984A (ja) 1992-08-19
CS203891A3 (en) 1992-01-15
EP0465311A1 (fr) 1992-01-08
FR2663885A1 (fr) 1992-01-03
DE69104655T2 (de) 1995-05-24
HU912188D0 (en) 1991-12-30
FR2663885B1 (fr) 1993-05-28
ATE113154T1 (de) 1994-11-15
HUT60585A (en) 1992-09-28
DK0465311T3 (da) 1995-04-03
ES2065637T3 (es) 1995-02-16
KR920003802A (ko) 1992-02-29
DE69104655D1 (de) 1994-11-24
HU214721B (hu) 1998-05-28

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