DE1690298A1 - Components of electrical arrangements applied to glass-like bodies - Google Patents

Description

TRIPLEX SAFETY GLASS COMPANY LIMITED London, England

Electrical components applied to glass-like bodies

Arrangements

The invention "relates to electrical components Arrangements that are applied to glass-like bodies.

In one aspect, the invention consists in a method for applying at least one electrical conductor an electrically non-conductive glass-like body, this The process steps involved in applying a tape are followed by a metal-containing substance on the surface of the body and burning in this tape, so that the metal cakes together to form a continuous, conductive tape.

In another aspect, the invention relates to a electrically non-conductive glass-like body, on the at least one component of an'electric arrangement according to the previous one Procedure outlined in paragraph has been applied.

In yet another aspect, the invention relates to an electrically non-conductive glass-like body having a the surface of this body applied metallic, electrical conductive tape covered with a layer of an electrically non-conductive vitreous material is coated, which is the tape

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as well as the adjacent parts of the body on either side of the ligament covered.

The invention was made with an arrangement in mind of electrical heating resistors on safety glass, as it is used for vehicle windows, is however in their possible applications in no way limited to this, as they are also suitable for opaque radiator panels and also for blackboards or panes made of glass and other glass-like materials, on which in an operating phase current-carrying, with an alarm circuit connected electrical conductors can be provided, comes into consideration, so that an alarm device is actuated as soon as the panes are destroyed or removed and the conductors are interrupted and they are no longer able to conduct electricity.

The lie tall particles are preferably mixed with a liquid or paste-like carrier substance mixed in, in which the Tape hardens or lets harden before the stoving process.

The preferred metal is silver, but any other suitable metal or metal alloy can be used; other suitable metals are, for example, gold, platinum and palladium.

The metal-containing substance can contain a material in which the metal is in the form of a chemical compound. So this substance can for example be an organic silver compound contain, which provides metallic silver when fired. -Request If necessary, however, the metal-containing substance can also contain metal particles which melt together during stoving. These particles are then preferably in the form of flakes or leaflets. the Metal particles can be seen with a liquid or paste-like carrier sub st anzwermi, with a typical carrier substance of this type an essential oil comes into consideration. Silver leaf in such suspension media is currently commercially available and these are masses sometimes referred to as "inks". If desired, the Metal particles in a carrier substance such as a thermoplastic synthetic resin material may be included, which is applied hot can be while it is in a liquid or paste-like State, and that when it cools down shortly after Application solidifies. As part of a typical arrangement iat for the

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Flakes or leaflets are of such a size that they pass through a 300 mesh per linear inch sieve. The metal flakes and the vehicle with which they mix can be applied in any suitable manner, a screen printing process being considered as a particularly suitable method.

It should be emphasized that the term screen printing process in this context should include all printing processes that work with a partly unperforated and partly perforated haster, it is irrelevant whether the hatcher is made of silk or one other material.

As process steps are within the scope of the invention Method preferably the application of a layer of particles of a vitreous material to the metallic tape, the covers the tape as well as the adjacent parts of the body on both sides of the tape, and the baking of this layer is provided, so that the particles of the vitreous material cake together to form a coherent, electrically non-conductive layer, which the Metal tape is supposed to protect.

The vitreous particles can be applied prior to application the metallic band and the parts of the body adjacent to it likewise with a liquid or paste-like carrier substance be mixed. In this case too, the carrier substance is preferred of such a nature that they after application and either cures by itself or to cure before baking can be brought. As a carrier here are also essential oils or thermoplastic synthetic resin compounds are suitable. The glass-like material used in the individual case is concerned it is preferably a glass frit material, glasses being preferred for this purpose which are at a temperature 'below that in which the glass-like body softens, let soften until sintering; moreover be for this Purpose preferably used glasses with a coefficient of thermal expansion that is essentially the same as that of the vitreous body is.

The particles contained in their respective carrier substance

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Kel of the vitreous material can be according to any suitable Procedure are applied, but a screen printing process is also preferred in this case.

Although the layer of vitreous material is normally arranged 39 that the metallic tape and the adjacent Parts of the glass-like body are largely covered, but preferably at least part of this band or remains these straps are uncovered, so that there is no difficulty in soldering or otherwise connecting an electrical one Establish connection.

The metal tape can be burned in before the layer of vitreous particles is applied to it, so that a second baking process is required for the vitreous layer. In a preferred procedure, one takes however, the baking of the metallic tape and the layer of vitreous particles in a single operation.

If the base consists of a sheet of heat-treated safety glass, the top layer and preferably also the burn-in of the tape, expediently in an operation with the heat treatment of the glass plate in their Hardening can be made. In this case, no additional heat treatment of the glass is required other than that which is usually provided for hardening glasses. Correspondingly, the baking process or (if two baking processes should be provided) one of two baking processes or both simultaneously with the heating of a glass plate, which precedes a bending process. It can be noted that normally no difficulties arise when a metallic tape according to the invention is applied to a surface of a glass-like plate or panel, the is then deformed in a concave manner. However, if the tape is applied to a surface that is subsequently deformed convex, then it must normally a larger band thickness should be provided ah otherwise it the case would be to ensure that the tape undergoes deformation does not tear.

The invention will now be described in more detail with reference to the accompanying drawings. In the drawings show:

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Figure 1 is a view of a vehicle window on which Heating tapes have been applied;

Figure 2 is a view similar to Figure 1, but an alternative arrangement is provided for the heating tapes?

FIG. 3 is a line taken along the line 3-3 of FIG Section on an enlarged scale; and

Figure 4 shows a differently designed vehicle window 'in which a further form of arrangement is provided for the heating tapes is.

To produce the one shown in FIGS A glass panel 10 is cut to size and inserted into the vehicle window the usual way and then a variety of Metal bands 11 (see Figure 3) formed thereon. Training the belts 11 is made in such a way that one after a screen printing process a substance containing silver is applied to the glass plate 10. The silver-containing substance can consist of silver flakes or flakes with a paste-like carrier material are mixed, which is in the form of a thermoplastic resin, the particle size of the leaflets being such that they will pass through a standard 300 mesh per inch sieve. One such a substance is applied hot and solidifies when it cools down » Typical substances of this type are commercially available. Optionally, the silver-containing substance can also be contained in a material be in which the silver is part of an organic compound forms, this material being metallic when stoved Silver supplies. Typical substances of this type are also commercially available.

After the silver-containing substance solidifies or hardens is or has been converted into the hardened state, is brought to each of the belts 11 as well as to the adjacent parts of the Glass plate 10 has a layer of a vitreous material. For training A glass frit clay material in a liquid or paste-like carrier substance is applied to this layer by means of a screen printing process applied. The glass frit is designed so that it can with a temperature below the softening temperature of the glass plate 10 softens under sintering and also has a coefficient of thermal expansion has, which is essentially the same as that of

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Glass plate is. The carrier substance can be any of the substances of this type described above. Suitable glass frit masses mixed with carrier substances are customary.

After the layer containing this glass frit compound has solidified or has been converted into the hardened state, · the entire arrangement undergoes a baking process in an oven subjected, in which it is achieved that the silver sintered together to form continuous bands 11 and the frit material fused to form a protective layer 12 for these tapes. The stoving can expediently be carried out in one operation a heat treatment process for hardening the glass plate 10 pre-QP be taken.

In the arrangement shown in Figure 1, as a rear window A motor vehicle is to be used, a plurality of composite strips 15 is provided, each of which is a Has silver tape with a protective layer of a glass-like Material is coated, these strips 15 being parallel to one another and extending between two common feed lines 14 extend similar to the strips 13, however: wider than that Stripes 15 are. In a typical arrangement of this type, the Stripe 13 silver ribbons 0.0076 mm (θ.0003 inches) thick up to 0.0127 mm (0.0005 inches) and are 0.581 mm (0.015 inches) = wide. The distance between adjacent strips 13 is P 25.4 mm (l in.) To 51.75 mm (l.25 in). With a 12 volt DC

Electricity system, as is common in motor vehicles, can emit heat correspondingly about 3 »77 watts per square decime te r can be achieved. This usually causes the windows to clear up quickly, which in a moderate climate does η after 5 to 5 minutes are completely free. The silver ribbons of the feed lines 14 are approximately 4.83 mm (0.19 inches) wide and therefore lead only dissipates a negligible amount of heat. To go further Limiting this heat dissipation can be a solder clad Copper tape to be soldered to this in the longitudinal extension of the metal strips. A typical tape of this type is 0.051 mm (0.002 inches) thick and 3.175 µm (0.125 inches) wide. When using a copper tape the tape will not be covered with a layer of a vitreous

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Material coated »

The ends of the feed lines I4 can be of the glassy type Ground remain uncovered and it can supply lines 15 in the form be soldered onto them by metal strips or wires. At the Soldering of copper bands on the feed lines 14 can also Customized extension parts of these bands serve as leads I5.

The arrangement shown in Figure 2 is generally the similar to those shown in Figure 1, with only the transversely stretched Strips 13 are replaced by vertically arranged strips 16. The strips 16 extend between feed lines I7, which, as can also be seen from the drawing, are arranged in such a way that the strips are combined in several groups, within which they look in parallel between the common Feed lines extend, these individual groups are connected in series. The feed lines arranged at the end have supply lines 18 similar to the supply line part I5.

The windows shown in Figures 1 and 2 can in the usual way in rubber seals or similar glazing tapes be taken, the feed lines I4 and I7 are covered by the glazing tapes.

In the arrangement shown in Figure 4, a plurality of strips are on a glass plate 19, which generally the strip 13 and 16 are similar. The stripes are in the way arranged that a central part of the glass plate I9 of a A plurality of parallel, equally spaced horizontally extending strips 20 is covered, while to both Sides of this part an end part with a common conductive panel on the lower, outer peripheral edge is provided, which is through fan-shaped strips 22 with the adjacent ends of the horizontal strip 20 of the central part is connected. The fan-shaped stripes taper with increasing Distance from the common panel 21 and the lower of the horizontally extending strips 20 are wider than the upper, so that the overall arrangement is therefore such that in any Flat area including that of some short lengths of

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Laterally adjoining strips covered area a substantially uniform heat emission takes place.

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Claims (1)

Claims ^ »Method for applying at least one electrical conductor an electrically non-conductive glass-like body through the process steps of applying a tape to a metal-containing substance on the surface of the body and burning in until the metal has caked together to form a coherent, conductive tape. $. Method according to claim 1, characterized in that the metal-containing Substance with a liquid or paste-like carrier material contains mixed metal particles and the tape before the burning-in process is brought to harden or hardens by itself. 3 · The method according to claim 1, characterized in that the metal-containing Substance contains a material in which the metal is present as part of a chemical compound and which the metal in Burn-in gives off. 4. The method according to any one of claims 1 or 2, characterized in that that the metal particles and their carrier material by a screen printing process be applied to the vitreous body. 5 · Method according to one of Claims 1 to 4 »characterized by the Method steps of applying a layer 'of particles, a vitreous material on the metallic band that the band and the adjacent part of the body on either side of the tape, and the burning of the layer until the particles stick together of the vitreous material into a coherent, electrically non-conductive layer protecting the metallic tape. 6, method according to claim 5 »characterized in that the glass-like Particles before application to the metallic tape and the adjacent parts of the body with a liquid or paste-like Carrier material are mixed. 7 · The method according to claim 6, characterized in that the glass-like Particles and their carrier material are applied by a screen printing process. 8. The method according to any one of claims 5 to 7 »characterized in that that the metallic tape and the layer of vitreous particles can be burned in in a single burn-in process. 109820/1675 • Electrically non-conductive glass-like body, characterized in that on this body (10) according to the method one of claims 1
"until at least one electrical conductor (II) is applied. 40 »Electrically non-conductive glass-like body, characterized in that an electrically conductive
Tape (II) which is coated with a layer (12) of an electrically non-conductive glass-like material covering the tape (II) and the adjacent part of the body (10) on both sides of the tape (II). 10 9 8 2 0/1675