| (19) |
 |
|
(11) |
EP 0 117 355 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
26.03.1986 Bulletin 1986/13 |
| (43) |
Date of publication A2: |
|
05.09.1984 Bulletin 1984/36 |
| (22) |
Date of filing: 08.12.1983 |
|
|
| (84) |
Designated Contracting States: |
|
CH DE GB LI NL |
| (30) |
Priority: |
16.12.1982 US 450247
|
| (71) |
Applicant: PHILIP MORRIS INCORPORATED |
|
() |
|
| (72) |
Inventors: |
|
- Hearn, John R.
()
- Lanzillotti, Harry Vincent
()
- Burnett, George Henry
()
|
|
| |
|
| (54) |
Process for making a carbon heat source and smoking article including the heat source
and a flavor generator |
(57) The present invention relates to a process for producing a tasteless carbon heat
source from a preformed article of a lingo-cellulosic material according to which
the article is pyrolyzed in a continuously exchanged inert atmosphere at a temperature
within the range of from about 800° to about 1100 °C, for from about 0.5 to abour
3 hours, then cooled in the inert atmosphere at a rate of from about 500° to about
10°C per hour to a temperature within the range of from about 275°C to about 25°C,
and then subjected to at least one additional process step selected from an oxygen
absorption step, a salt impregnation followed by heat treatment step, and a water
desorption step. The present invention also relates to a smoking article including
the carbon heat source, and a flavor generator comprising a substrate material containing
at least one thermally releasable flavorant.