Device specification for PM capillary aerosol generator and PM's 2009 electrically heated smoking system having a liquid storage portion
| CAG | Electrically heated smoking system |
|---|---|
| Project Leap CAG (1995)26 | PM 2009 patent59 |
| “The aerosol is formed when the hot vaporized fluid exists the capillary tube.” | “In the aerosol forming chamber, the vapor condenses to form an aerosol, which is carried towards the air outlet.” |
| Pump forces liquid into small tube (capillary) | “liquid is transferred from the liquid storage towards the heating element by capillary action of the wick.” |
| Small tube, or capillary is heated | “a heating element for heating the second end of the capillary wick.” |
| Capillary contains liquid | “The mouthpiece includes a liquid storage portion.” |
| Liquid in tube is aerosolised | “Liquid at the second end of the capillary wick is vaporized by the heating element.” |
| Heating wire wrapped around a small tube to evenly heat liquid in tube | “at least one heating element comprises a coil of wire surrounding the capillary wick.” |
| “Nichrome heating wire…was found to be useful for supplying heat to the capillary tube evenly.” | “Other alternatives include a heating wire or filament, for examine a Ni—Cr, platinum, tungsten or alloy wire.” |
| “Two power sources may be needed to operate the aerosol generator in a pulse mode if the unit is to be puff actuated.” | “The electric circuitry is arranged to provide an electric current pulse to the at least one heating element when the user initiates a puff.” |
| ”Mouthpiece was placed on one end of the outer tube.” | “An electrically heated smoking system includes a shell and a replaceable mouthpiece.” |
| Aerosol and method and apparatus for generating aerosol patent (1996) 27 | PM 2009 patent (contd) 59 |
| Ideal electric source for heater was a battery. | “The battery supplies a current pulse…to the heating coil.” |
| “For portable applications…replaceable, rechargeable battery, such as…nickel-cadmium battery pack.” | “An example of suitable circuitry is one or more capacitors or rechargeable batteries.” |
| “puff-actuated sensor” | “Preferably, the electric circuitry comprises a sensor to detect air flow indicative of a user taking a puff.” |
| “propylene glycol and glycerol…preferred” | “Examples of suitable aerosol formers are glycerine and propylene glycol.” |
CAG, capillary aerosol generator; PM, Philip Morris.