Patent EP0128664A1 successfully refreshed from Google Patents.
EP0128664A1
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Laminar electrical heaters
Assignee: Raychem Corp
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Filing: 1984-05-10
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Granted: —
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Expires: 2004-05-10
Abstract
Abstract Laminar heaters comprise a laminar heating element (5) sandwiched between two laminar electrodes (1, 3) having substantial electrical resistance along the thickness thereof. The heater has a heating area of irregular shape, and at least one of the electrodes extends over a connection area in which heat is not generated but which provides a shorter and/or more uniform current path to the heatgenerating parts of the heater.
Inventors
- 👤 David Chazan
- 👤 Michael Joseph Katila
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 18:39
CPC Classifications
G; G06; G06F; G06F9/00; G06F9/06; G06F9/22; H; H05; H05B; H05B3/00; H05B3/40; H05B3/54; H05B3/58; B; B29; B29C; B29C61/00; B29C61/06; B29C61/0608; B29C61/0625; G06F9/28; H02; H02G; H02G15/00; H02G15/08; H02G15/18; H02G15/1806; H05B3/10; H05B3/12; H05B3/14; H05B3/146; H05B3/20; H05B3/34; H05B2203/00; H05B2203/009; H05B2203/013; H05B2203/02; Y; Y10; Y10S; Y10S174/00; Y10S174/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
96 words
A laminar heater which comprises (a) first and second electrodes which can be connected to a source of electrical power; and (b) a laminar resistive heating element through which current flows when the electrodes are connected to source of electrical power; the heater comprising, when the electrodes are connected to a source of electrical power, (l) at least one heating area in which current flows through the heating element between the electrodes, and (2) at least one connection area in which current passes through at least one of the electrodes but not through the heating element.
Claim 2
Dependent Claim
96 words
A laminar heater which comprises (a) first and second electrodes which can be connected to a source of electrical power; and (b) a laminar resistive heating element through which current flows when the electrodes are connected to source of electrical power; the heater comprising, when the electrodes are connected to a source of electrical power, (l) at least one heating area in which current flows through the heating element between the electrodes, and (2) at least one connection area in which current passes through at least one of the electrodes but not through the heating element.
Claim 3
Dependent Claim
43 words
A heater according to claim 1 wherein (i) each of the electrodes is a laminar electrode which has low electrical resistance through the thickness thereof but substantial electrical resistance along the thickness thereof, and (ii) the heating element is sandwiched between the electrodes.
Claim 4
Dependent Claim
75 words
A heater according to claim 1 or 2 which comprises first and second electrical connection means which (a) can be connected to a source of electrical power and (b) make distributed electrical contact with the first and second electrodes respectively; there being points on at least one of the electrodes in the heating area which are connected to the respective connection means by a path of least electrical resistance which passes through the connection area.
Claim 5
Dependent Claim
21 words
A heater according to claim 1, 2 or 3 wherein the heating element comprises a conductive polymer which exhibits PTC behavior.
Claim 6
Dependent Claim
28 words
A heater according to any one of claims 1 to 4 which undergoes a change in shape when it is connected to a suitable source of electrical power.
Claim 7
Dependent Claim
36 words
A heater according to any one of claims 1 to 5 which is secured to an electrically non-conductive element which undergoes a thermal response when the heater is connected to a suitable source of electrical power.
Claim 8
Dependent Claim
39 words
A heater according to claim 6 wherein the non-conductive element is a heat-shrinkable polymeric sheet and the heater is an apertured heater which undergoes deformation through a change in the shape of the apertures when the polymeric sheet shrinks.
Claim 9
Independent Claim
61 words
A method of providing a protective covering over a substrate, which comprises (A) placing adjacent the substrate a heat-recoverable article which comprises a heater as claimed in any one of claims 1 to 7; and (B) connecting the electrodes to a source of electrical power to cause the article to recover in selected areas corresponding to heating areas of the heater.
Claim 10
Dependent Claim
29 words
A method according to claim 8 wherein the article comprises a heat-activatable adhesive coated on the interior surface of the article in at least one of the selected areas.
Claim 11
Dependent Claim
88 words
A method according to claim 8 or 9 wherein the substrate comprises a splice in a telephone cable and the article is a wrap-around article which has been wrapped around the splice and secured in place by means of a closure device which is secured to longitudinal edge sections of the article; and the selected areas of the article comprise (a) end sections of the article which shrink down into contact with the telephone cable and (b) at least one of the longitudinal edge sections of the article.
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