Patent EP0438862A2 successfully refreshed from Google Patents.
EP0438862A2
Expired / Lapsed
EP
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Electrically-powered linear heating element
Assignee: Philip Morris Products Inc
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Filing: 1990-11-20
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Granted: —
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Expires: 2010-11-20
Abstract
Abstract A heating element (7) for use within a smoking device (8) which, without burning, heats a flavor-generating medium within the device to produce an aerosol, vapor, or flavor, which the consumer may inhale. More particularly, an electrically-powered heating element (7) having a plurality of discrete resistive heating segments (4), only one of which is active at any given time. In a preferred embodiment, the heating element is contained within the device so that the individual heating segments of the element are adjacent to a flavor-generating medium. As each segment of the heating element is provided with power, the flavor-generating medium adjacent to that segment is heated, but is not burned. This heating causes the flavor-generating medium to produce a flavor, aerosol, or vapor, which the consumer of the device may inhale.
Inventors
- 👤 Seetharama C. Deevi
- 👤 Francis M. Sprinkel
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 22:38
CPC Classifications
A; A24; A24F; A24F40/00; A24F40/40; A24F40/46; H; H05; H05B; H05B3/00; A24F40/20
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
131 words
An electrically-powered linear heating element for a device, characterised by a linear base member (1), by at least one electrically-resistive linear heating member (3) switchably connectable to an electrical power source (5), said heating member having a resistivity which, when said heating member is connected to said power source, causes the heating member to attain a termperature sufficient to heat, without burning, a flavor-generating medium which is in thermal contact with said heating member, and by at least one linear insulating (2) member secured between the base member and the heating member, said insulating member having an electrical resistance sufficiently high to electrically isolate the heating member from the base member, said insulating member also having a thermal conductivity sufficiently low to thermally isolate the heating member from the base member.
Claim 2
Dependent Claim
55 words
An electrically-powered linear heating element according to Claim 1, comprising a pair of the said electrically-resistive linear heating members (3) and a pair of the said linear insulating members (2), the insulating members each being disposed along a respective side of the base member and secured to a respective one of the resistive heating members.
Claim 3
Dependent Claim
37 words
The electrically-powered heating element according to Claim 1 or 2 wherein the base member comprises an element selected from the group consisting of metallic tape, metallic or nonmetallic oxide, carbides, nitrides, silicides, carbonnitrides, inter-metallic compounds, and cermet.
Claim 4
Dependent Claim
107 words
An electrically-powered linear heating element for a smoking device characterised by at least one electrically-resistive linear heating member (3) switchably connectable to an electrical power source (5), the heating member having a resistivity which, when said heating member is connected to said power source, causes the heating member to attain a temperature sufficient to heat a flavor-generating medium which is in thermal contact with said heating member, and by at least a linear base member (1) secured to said heating member, said base member comprising an electrically-insulating material capable of maintaining its structural integrity and chemical inertness throughout the range of operating temperatures of the heating member.
Claim 5
Dependent Claim
31 words
An electrically-powered linear heating element according to claim 4 comprising a pair of the said electrically-resistive linear heating members (3) each arranged along a respective side of the linear base member.
Claim 6
Dependent Claim
31 words
The electrically-powered heating element of Claim 3 and 4, wherein the base member is fabricated from one of the group comprising carbides, nitrides, silicides, oxides, metallic carbonitrides, inter-metallic compounds, and cermet.
Claim 7
Dependent Claim
39 words
The electrically-powered heating element of any of Claim 1 to 6, wherein the or each electrically-resistive heating member comprises a plurality of electrically-discrete resistive segments (4), each of which is switchably and independently connectable to an electrical power source.
Claim 8
Dependent Claim
24 words
The electrically-powered heating element of any preceding claim, wherein the or each electrically-resistive heating member has a resistance of between 0.2 and 20.0 ohms.
Claim 9
Dependent Claim
24 words
The electrically-powered heating element of Claim 8 wherein the or each electrically-resistive heating member has a resistance of between about 0.5 and 1.5 ohms.
Claim 10
Dependent Claim
24 words
The electrically-powered heating element of claim 9, wherein the or each electrically-resistive heating member has a resistance of between about 0.8 and 1.2 ohms.
Claim 11
Dependent Claim
36 words
The electrically-powered heating element of any preceding claim, wherein the or each heating element is of a size which could be contained within a smoking device having an outside diameter of between 6 and 18 millimeters.
Claim 12
Dependent Claim
20 words
The electrically-powered heating element of any preceding claims, wherein the base member comprises a mat of woven or non-woven fibers.
Claim 13
Dependent Claim
60 words
The electrically-powered heating element of any previous claim, wherein the heating element is encased in a protective coating, said protective coating providing a physical and chemical barrier between the heating element and its surroundings, and being substantially chemically non-reactive with the other components of the heating element and with the environment in which the heating element is to be used.
Claim 14
Dependent Claim
23 words
A non-combustible smoking article comprising a body (18) containing a flavor-generating medium and a linear heating element (7) according to any preceeding claim.
References Cited (Backward Citations)
No citation records indexed.
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