Form A(9/'77) Date : 11 October 1988
`Philip Morris USA
`
`PM # : I3 4 S
`
`TO : Patent Counsel
`
`INVENTION RECORD
`
`Preliminary Disclosure for
`Consideration of Patentability
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`1 . DESCRIPTION,OF THE INVENTION (in sufficient detail for the invention to be
`understood ; please identify or attach copies of any reports, notebook pages,
`or other documents containing particular examples or other pertinent d'ata), :
`
`This invention relates to an electrically heated'smoking device in which a
`cylindrical heater surrounds a substrate-holding highly conductive can, and is
`surrounded with a gap and an insulating cylindrical sleeve, such that incoming
`air drawn in withia puff°is preheated by the cylindrical heater before it enters
`the substrate-holding can (See attached Figure 1) . The cylindrical heater is
`maintained at an optimum essentially constant temperature . An optional second
`heater located in the center of the substrate bed can be elevated in temperature
`at some time before and/or during the time a puff is taken . Alternately, the
`eriergy provided to the cylindrical sleeve heater can also, or instead of using an
`internal heater, be increased just prior to and/or during the puff . The air flow
`pattern of the smoking device is such that by preheating the air drawn in for the
`puff, the temperature drop of the aerosol forming substrate is reduced . Incoming
`puffing air also acts to cool the article exterior surface when the air enters
`and flows through the air gap between the cylindrical heater and the article
`exterior wall . The gap between the cylindrical heater and the outer sleeve works
`as a good insulator between the puffs .
`
`2 . OBJECTS/ADVANTAGES OF THE INVENTION : The object of the invention is to
`deliver anioptimum aerosol with the least amount of total energy input .
`Advantages of the invention are :
`
`1 . The air gap is anlinsulator to minimize article exterior surface
`temperature and power loss . The air flow pulled through the gap during puffing
`helps to cool the article exterior surface . Incoming puffing air is warmed
`before entering the aerosol generator to minimize cooling of the aerosol forming
`substrate during puffing .
`
`2 . A center heater which can be pulsed with energy before or during,a
`puff serves to minimize total energy requirements since the cylindrical sleeve
`heater can be operated'at a lower temperature than would be required without'the
`internal heater . Alternately, the energy to the cylindrical sleeve heater can be
`pulsed prior to or during the puff in cases where the center heater is not used .
`
`3 .
`
`4'.
`
`.
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`STATE OF THE ART (list any known patents or publications that seem
`pertinentY :
`2020248700
`
`EPO 0277519A2
`
`HAS THERE BEEN A DISCLOSURE OF THE INVENTION TO ANYON OUTSPDE
`N ` Z"4
`IF SO, EXPLAIN . No .
`
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`COMPANY?
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`Manager's Signature :
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`,
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`Source: https://www.industrydocuments.ucsf.edu/docs/znbc0114
`
`Philip Morris Products, S.A.
`Exhibit 1020
`Page 001
`
`

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`cent.er heater
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`dilntibn
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`air flox
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`cylindrical heater
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`figure I
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`
`Source: https://www.industrydocuments.ucsf.edu/docs/znbc0114
`
`Philip Morris Products, S.A.
`Exhibit 1020
`Page 002
`
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