CA1171928A - Self-adhesive crossover foil - Google Patents
Self-adhesive crossover foilInfo
- Publication number
- CA1171928A CA1171928A CA000384266A CA384266A CA1171928A CA 1171928 A CA1171928 A CA 1171928A CA 000384266 A CA000384266 A CA 000384266A CA 384266 A CA384266 A CA 384266A CA 1171928 A CA1171928 A CA 1171928A
- Authority
- CA
- Canada
- Prior art keywords
- strip
- electrically
- crossover
- foil
- insulating
- 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
Links
- 239000011888 foil Substances 0.000 title claims abstract description 76
- 239000000853 adhesive Substances 0.000 title claims abstract description 11
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000004033 plastic Substances 0.000 claims description 7
- 229920003023 plastic Polymers 0.000 claims description 7
- -1 polyethylene terephthalate Polymers 0.000 claims description 5
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 3
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims 1
- 229920002799 BoPET Polymers 0.000 description 9
- 239000005041 Mylar™ Substances 0.000 description 9
- 239000004568 cement Substances 0.000 description 4
- 229910001369 Brass Inorganic materials 0.000 description 3
- 239000010951 brass Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229920006266 Vinyl film Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920006284 nylon film Polymers 0.000 description 1
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Burglar Alarm Systems (AREA)
Abstract
SELF-ADHESIVE CROSSOVER FOIL ABSTRACT OF THE DISCLOSURE A self-adhesive crossover foil for use in security alarm systems includes an electrically conductive strip, an electrically insulating strip which is adhesively joined to one surface of the conductive strip and which is at least as wide as the conductive strip, and a pressure-sensitive adhesive, disposed on the exposed surface of the insulating strip opposite the surface adjoining the insulating strip to the conductive strip. The crossover foil may additionally include a release strip which is coupled to the pressure-sensitive adhesive. A process for installing the foil is also disclosed.
Description
~.~7~%8 This invention relates to an improved, self-adhesive foil for use in intrusion alarm systems and the process for installing the same.
In the prior art systems, the process for the protection of ~indow and wall areas required that a foil, usually of lead material, ~e connected across the window or wall area, up to the intersection of a window crossbar or mullion. When the crossbar is reached, an insulating material has to be placed on the crossbar so that the foil will not make electrical contact with the crossbar and short~
circuit the electrical alarm system. In some cases, a brass shim is usually cut and contoured over the crossbar and insulated from the crossbar member, so as to interconnect foil pieces of adjacent window areas. The brass is then soldered to the ends of the foil of adjacent windows, to complete the electrical connection. This process has the disadvantage of being time consuming and thus costly for installations involving a large number of crossbar members.
It is therefore an object of the present invention to provide a permanent, self-adhesive crossover foil, which is simple in construction, inexpensive in cost, reliable in operation, and easy to install.
In accordance with the present invention, a self-adhesive crossover foil for use in security alarm systems is provided which includes an electrically-conductive strip having first and second surfaces on opposite sides thereof, an electrically-insulating strip having first and second surfaces on opposite sides thereof, said first surface of which is Joined to said second surface 3~ of said electrically-conductive strip, and said electrically-- 1 - .~
~ ~192~3 insulating strip being at least as wide as said electrically-conductive strip, and a pressure-sensitive adhesive disposed on said second surface of said electrically-insulating strip. Such a crossover foil may be installed by adhesively securing the crossover foil over the crossbar, so that the dielecric or insulating strip insulates the crossbar from the electrically-conductive strip, allowing the crossover foil to extend into electrical contact with each of the ends of the foils of the adjacent planar surfaces, and electrically connecting the ends of the crossover foil to the ends of the planar surface foils.
In the invention, the crossover foil is preferably constructed of lead ~oined to a strip of polyethylene terephthalate, commonly known under the trademark "Mylar".
The "M~lar" strip not only provides an insulation between the foil and the crossbar, but it also reinforces the foil, so as to make it tear-resistant.
According to the invention, the foil is simply adhesively secured to the crossbar and the ends of the crossover foil are then preferably soldered, cemented, or electrically connected, by means of a perforating tool, to the ends of the window foil pieces to complete the electrical connection. The use of the inventive self-adhesive crossover foil thus eliminates costly and unsightly foil blocks between panes of glass, and provides an attractive, professional appearance, which conforms to the window mullion contours.
In one embodiment of the invention, the insulating strip is the same width as the conductive strip in the crossover foil. In another embodiment, the insulating strip ~'7~L9~3 is made slightly wider than the conductive strip, so as to prevent any accidental electrical contact to the crossbar, if the foil is nicked or elongated over the "Mylar'l.
Other objects and features of the present invention will become a,pparent from the following detailed description considered in connection with the accompanying drawings which disclose several embodiments of the invention.
It is to be understood that the drawings are des~gned for the purpose of illustration only and are not intended as a definition of the limits of the invention.
In the drawings, wherein similar reference charac-ters denote similae elements throughout the several views: , Fig. 1 is a perspective view of a window area, showing a crossbar member and a crossover foil of the present invention interconnecting the window foils;
Fig. 2 is a cross-sectional view taken along line
In the prior art systems, the process for the protection of ~indow and wall areas required that a foil, usually of lead material, ~e connected across the window or wall area, up to the intersection of a window crossbar or mullion. When the crossbar is reached, an insulating material has to be placed on the crossbar so that the foil will not make electrical contact with the crossbar and short~
circuit the electrical alarm system. In some cases, a brass shim is usually cut and contoured over the crossbar and insulated from the crossbar member, so as to interconnect foil pieces of adjacent window areas. The brass is then soldered to the ends of the foil of adjacent windows, to complete the electrical connection. This process has the disadvantage of being time consuming and thus costly for installations involving a large number of crossbar members.
It is therefore an object of the present invention to provide a permanent, self-adhesive crossover foil, which is simple in construction, inexpensive in cost, reliable in operation, and easy to install.
In accordance with the present invention, a self-adhesive crossover foil for use in security alarm systems is provided which includes an electrically-conductive strip having first and second surfaces on opposite sides thereof, an electrically-insulating strip having first and second surfaces on opposite sides thereof, said first surface of which is Joined to said second surface 3~ of said electrically-conductive strip, and said electrically-- 1 - .~
~ ~192~3 insulating strip being at least as wide as said electrically-conductive strip, and a pressure-sensitive adhesive disposed on said second surface of said electrically-insulating strip. Such a crossover foil may be installed by adhesively securing the crossover foil over the crossbar, so that the dielecric or insulating strip insulates the crossbar from the electrically-conductive strip, allowing the crossover foil to extend into electrical contact with each of the ends of the foils of the adjacent planar surfaces, and electrically connecting the ends of the crossover foil to the ends of the planar surface foils.
In the invention, the crossover foil is preferably constructed of lead ~oined to a strip of polyethylene terephthalate, commonly known under the trademark "Mylar".
The "M~lar" strip not only provides an insulation between the foil and the crossbar, but it also reinforces the foil, so as to make it tear-resistant.
According to the invention, the foil is simply adhesively secured to the crossbar and the ends of the crossover foil are then preferably soldered, cemented, or electrically connected, by means of a perforating tool, to the ends of the window foil pieces to complete the electrical connection. The use of the inventive self-adhesive crossover foil thus eliminates costly and unsightly foil blocks between panes of glass, and provides an attractive, professional appearance, which conforms to the window mullion contours.
In one embodiment of the invention, the insulating strip is the same width as the conductive strip in the crossover foil. In another embodiment, the insulating strip ~'7~L9~3 is made slightly wider than the conductive strip, so as to prevent any accidental electrical contact to the crossbar, if the foil is nicked or elongated over the "Mylar'l.
Other objects and features of the present invention will become a,pparent from the following detailed description considered in connection with the accompanying drawings which disclose several embodiments of the invention.
It is to be understood that the drawings are des~gned for the purpose of illustration only and are not intended as a definition of the limits of the invention.
In the drawings, wherein similar reference charac-ters denote similae elements throughout the several views: , Fig. 1 is a perspective view of a window area, showing a crossbar member and a crossover foil of the present invention interconnecting the window foils;
Fig. 2 is a cross-sectional view taken along line
2-2 of Fig. l;
Fig. 3 is a perspective view of a flattened piece of the crossover foil;
Fig. 4 is a cross-sectional view taken along line 4-4 of Fig. 3; and Fig. 5 is a cross-sectional view of a further embodiment of the crossover foil, according to the invention.
Referring to Figs. 1 and 2, there is shown a typical installation of a crossover foil 16 for electrically interconnecting the ends of foils 14 and 18 of two adjacent window panes 10 and 11. In Figs. l and 2, a lead foil 14, which is secured to the window surface, terminates adjacent to crossbar 12, so as not to make electrical contact with the crossbar. In this invention, the crossbar is shown l9;~8 constructed of wood, but it could also be made of metal for casement windows. The crossbar is used to hold adjacent panes of glass and employs a window putty 13 between the crossbar and the edges of windows 10 and 11.
In the invention, a crossover foil 16, which will be described in more detail hereinafter, is placed over the contours of crossbar 12, so that it extends along the edge of window panes 10 and 11, for approximately 1". Window foil 14 and adjacent foil 18 of window 11 are then terminated over the extendi.ng legs 19 and 29, so that electrical contact can be made. On the connection of leg 19 to foil 14, a liquid solder 15, consisti.ny of a suspension of finely-divided metal particles in the form of a cement, is deposited so as to electrically ~oin the two foils.
In another embodiment, foil leg 29 may be joined to the end of foil 18 by means of a solder connection 28, which can be performed by a soldering iron. It is also possible to join leg 29 to foil end 18 by means of making a perforation 27, using a perforating tool, so that the metal of both foils are compressed together, as shown in detail in Fig. 2.
Referring to Figs. 3 and 4, there is shown a detailed view of the crossover foil according to the invention. The foil, which is enlarged and exaggerated in thickness for purposes of illustration, includes a flexible electrically-conductive metal strip 20, preferably of lead, which is usually 1/4" wide and .005" thick. Cemented by means of cement 21 to foil 20, is an insulating strip 22, preferably constructed of plasti.c, e.g., moisture-proof "Mylar" of .001" thick. The plastic strip is the ~ 7~928 same width in Fig. 4 as the lead foil 20, and is coated wlth a pressure-sensitive adhesive 23 throughout its length. A
release strip 24 is used to cover the adhesive area 23, and is generally peeled away when the crossover foil is to be used on a crossbar.
Fig. 5 shows another embodiment of the invention, wherein lead foil 30 is cemented by means of cement 31, to a wider strip of insulating material 32, also preferably constructed of moisture-proof plastic and, in particular, "Mylar". A pressure-sensitive adhesive 33 is then deposited on the opposite surface of the plastic strip, and a release strip 34 protects the adhesive until the crossover foil is ready to be used~ In the embodiment of Fig. 5, lead foil 30 is preferably 1/4" wide and .005" thick, and the Mylar (trademark) strip, with its adhesive-and-release strip, are preferably 1/2" wide. The "Mylar" strip is preferably .001"
thick and will provide reasonably good insulation at moderate voltage levels. The embodiment of Fig. 5 has the advantage that small nicks made to the lead foil, will not be swaged over the thin "Mylar" insulator, to make accidental contact with the crossbar.
The crossover foil is preferably manufactured in elongated rolls and may be cut with ordinary scissors to the desired lengths for use. It can also be sold in pre-cut strips of 4", 5" or 6" lengths. The strips are temporari]y joined together by a common backing strip, so that they can individually be peeled off from the same backing strip as they are used.
~-~7~9~
The cement holding foil 30 or 20 to plastic strip 32 or 22, is preferably stronger than pressure-sensitive adhesive 33, so as to prevent a separation of the metal foil from the plastic foil, when the crossover foil is applied to the crossbar. The use of "Mylar" adds not only flexibility and insulation to the crossover foil, but also improves its strength.
The crossover foil of the invention could also employ other malleable metals, such as copper, tin-plated copper, tin-plated brass, tin or aluminum. The flexible, insulating or dielectric film could also be acetate, polyethylene, "Kapton" (trademark), Nylon, or vinyl film, instead of "Mylar".
Thus, while only several embodiments of the present invention have been shown and described, it will be obvious that many changes and modifications may be made thereunto, without departing from the spirit and scope of the invention.
Fig. 3 is a perspective view of a flattened piece of the crossover foil;
Fig. 4 is a cross-sectional view taken along line 4-4 of Fig. 3; and Fig. 5 is a cross-sectional view of a further embodiment of the crossover foil, according to the invention.
Referring to Figs. 1 and 2, there is shown a typical installation of a crossover foil 16 for electrically interconnecting the ends of foils 14 and 18 of two adjacent window panes 10 and 11. In Figs. l and 2, a lead foil 14, which is secured to the window surface, terminates adjacent to crossbar 12, so as not to make electrical contact with the crossbar. In this invention, the crossbar is shown l9;~8 constructed of wood, but it could also be made of metal for casement windows. The crossbar is used to hold adjacent panes of glass and employs a window putty 13 between the crossbar and the edges of windows 10 and 11.
In the invention, a crossover foil 16, which will be described in more detail hereinafter, is placed over the contours of crossbar 12, so that it extends along the edge of window panes 10 and 11, for approximately 1". Window foil 14 and adjacent foil 18 of window 11 are then terminated over the extendi.ng legs 19 and 29, so that electrical contact can be made. On the connection of leg 19 to foil 14, a liquid solder 15, consisti.ny of a suspension of finely-divided metal particles in the form of a cement, is deposited so as to electrically ~oin the two foils.
In another embodiment, foil leg 29 may be joined to the end of foil 18 by means of a solder connection 28, which can be performed by a soldering iron. It is also possible to join leg 29 to foil end 18 by means of making a perforation 27, using a perforating tool, so that the metal of both foils are compressed together, as shown in detail in Fig. 2.
Referring to Figs. 3 and 4, there is shown a detailed view of the crossover foil according to the invention. The foil, which is enlarged and exaggerated in thickness for purposes of illustration, includes a flexible electrically-conductive metal strip 20, preferably of lead, which is usually 1/4" wide and .005" thick. Cemented by means of cement 21 to foil 20, is an insulating strip 22, preferably constructed of plasti.c, e.g., moisture-proof "Mylar" of .001" thick. The plastic strip is the ~ 7~928 same width in Fig. 4 as the lead foil 20, and is coated wlth a pressure-sensitive adhesive 23 throughout its length. A
release strip 24 is used to cover the adhesive area 23, and is generally peeled away when the crossover foil is to be used on a crossbar.
Fig. 5 shows another embodiment of the invention, wherein lead foil 30 is cemented by means of cement 31, to a wider strip of insulating material 32, also preferably constructed of moisture-proof plastic and, in particular, "Mylar". A pressure-sensitive adhesive 33 is then deposited on the opposite surface of the plastic strip, and a release strip 34 protects the adhesive until the crossover foil is ready to be used~ In the embodiment of Fig. 5, lead foil 30 is preferably 1/4" wide and .005" thick, and the Mylar (trademark) strip, with its adhesive-and-release strip, are preferably 1/2" wide. The "Mylar" strip is preferably .001"
thick and will provide reasonably good insulation at moderate voltage levels. The embodiment of Fig. 5 has the advantage that small nicks made to the lead foil, will not be swaged over the thin "Mylar" insulator, to make accidental contact with the crossbar.
The crossover foil is preferably manufactured in elongated rolls and may be cut with ordinary scissors to the desired lengths for use. It can also be sold in pre-cut strips of 4", 5" or 6" lengths. The strips are temporari]y joined together by a common backing strip, so that they can individually be peeled off from the same backing strip as they are used.
~-~7~9~
The cement holding foil 30 or 20 to plastic strip 32 or 22, is preferably stronger than pressure-sensitive adhesive 33, so as to prevent a separation of the metal foil from the plastic foil, when the crossover foil is applied to the crossbar. The use of "Mylar" adds not only flexibility and insulation to the crossover foil, but also improves its strength.
The crossover foil of the invention could also employ other malleable metals, such as copper, tin-plated copper, tin-plated brass, tin or aluminum. The flexible, insulating or dielectric film could also be acetate, polyethylene, "Kapton" (trademark), Nylon, or vinyl film, instead of "Mylar".
Thus, while only several embodiments of the present invention have been shown and described, it will be obvious that many changes and modifications may be made thereunto, without departing from the spirit and scope of the invention.
Claims (12)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A self-adhesive crossover foil for use in security alarm systems, comprising:
an electrically-conductive strip having first and second surfaces on opposite sides thereof;
an electrically-insulating strip having first and second surfaces on opposite sides thereof, said first surface of which is joined to said second surface of said electrically-conductive strip, and said electrically-insulating strip being at least as wide as said electrically-conductive strip; and a pressure-sensitive adhesive disposed on said second surface of said electrically-insulating strip.
an electrically-conductive strip having first and second surfaces on opposite sides thereof;
an electrically-insulating strip having first and second surfaces on opposite sides thereof, said first surface of which is joined to said second surface of said electrically-conductive strip, and said electrically-insulating strip being at least as wide as said electrically-conductive strip; and a pressure-sensitive adhesive disposed on said second surface of said electrically-insulating strip.
2. The crossover foil according to Claim 1, wherein said first surface of said electrically-insulating strip is adhesively joined to said second surface of said electrically-conductive strip.
3. The crossover foil according to Claim 1, wherein said electrically-conductive strip comprises a metal strip.
4. The crossover foil according to Claim 3, wherein said metal strip comprises lead.
5. The crossover foil according to Claim 1, wherein said electrically-insulating strip comprises a plastic strip.
6. The crossover foil according to Claim 5, wherein said plastic strip comprises polyethylene terephthalate.
7. The crossover foil according to Claim 1, wherein said electrically-conductive strip and said electrically-insulating strip are each about 1/4" wide and wherein said electrically-conductive strip is about .005"
thick and said electrically-insulating strip is about .001"
thick.
thick and said electrically-insulating strip is about .001"
thick.
8. The crossover foil according to Claim 1, wherein said electrically-insulating strip is substantially wider than said electrically-conductive strip.
9. The crossover foil according to Claim 1, additionally including a release strip releasably coupled to said pressure-sensitive adhesive.
10. The crossover foil according to Claim 8, additionally including a release strip coupled to said pressure sensitive adhesive, which release strip is about equal in width to said electrically-insulating strip.
11. A process for interconnecting conductor foils of adjacent planar surfaces, separated by a crossbar, comprising the steps of:
adhesively securing a crossover foil, comprising using a self-adhesive dielectric strip secured to a electrically-conductive strip, over the crossbar, so that the dielectric strip insulates the crossbar from the electrically-conductive strip allowing the crossover foil to extend into electrical contact with each of the ends of the foils of the adjacent planar surfaces; and electrically connecting the ends of the crossover foil to the ends of the planar surface foils.
adhesively securing a crossover foil, comprising using a self-adhesive dielectric strip secured to a electrically-conductive strip, over the crossbar, so that the dielectric strip insulates the crossbar from the electrically-conductive strip allowing the crossover foil to extend into electrical contact with each of the ends of the foils of the adjacent planar surfaces; and electrically connecting the ends of the crossover foil to the ends of the planar surface foils.
12. The process according to Claim 11, wherein said electrically-conductive strip is lead, and said dielectric strip is polyethylene terephthalate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000384266A CA1171928A (en) | 1981-08-20 | 1981-08-20 | Self-adhesive crossover foil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000384266A CA1171928A (en) | 1981-08-20 | 1981-08-20 | Self-adhesive crossover foil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1171928A true CA1171928A (en) | 1984-07-31 |
Family
ID=4120755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000384266A Expired CA1171928A (en) | 1981-08-20 | 1981-08-20 | Self-adhesive crossover foil |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1171928A (en) |
-
1981
- 1981-08-20 CA CA000384266A patent/CA1171928A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry | ||
| MKEX | Expiry |
Effective date: 20010820 |