BRPI0307705B1 - SMOKING ELECTRICAL SYSTEM AND METHOD - Google Patents

Description

(54) Title: ELECTRIC SMOKING SYSTEM AND METHOD (73) Holder: PHILIP MORRIS PRODUCTS INC., North American Society. Address: 3601 Commerce Road Richmond, VA 23234, UNITED STATES OF AMERICA (US) (72) Inventor: JAY A. FOURNIER; JOHN PAINE III

Validity Term: 10 (ten) years from 10/02/2018, subject to legal conditions

Issued on: 10/02/2018

Digitally signed by:

Liane Elizabeth Caldeira Lage

Director of Patents, Computer Programs and Topographies of Integrated Circuits

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Descriptive Report of the Invention Patent for SYSTEM AND ELECTRIC SMOKING METHOD.

Field of the Invention [001] The present invention relates to electrical smoking systems and methods for reducing gaseous components during smoking.

Background of the Invention [002] Traditional cigarettes are consumed by lighting one end of a wrapped tobacco bar and pulling air predominantly through the suctioned end at one end of the cigarette. Traditional cigarettes give off smoke as a result of combustion, during which a mass of tobacco is burned at temperatures that often exceed 800 C during a puff. The heat of combustion releases several gaseous combustion products and tobacco distillates. As these gaseous products are pulled through the cigarette, they cool and condense to form a smoke containing the flavors and aromas associated with the smoke. Traditional cigarettes produce sidestream smoke during slow combustion between puffs. Once accessed, they must be completely consumed or discharged. Rekindling a traditional cigarette is possible but it is usually an unattractive proposition for a discerning smoker for subjective reasons (aroma, taste, odor).

[003] In an electrical smoking system, it is desirable to smoke in a way that satisfies the experiences of smokers with more traditional cigarettes, such as an immediate response (the release of smoke occurring the instant after pulling), a desired level of release (which correlates with FTC tar content), along with a desired pull resistance (RTD) and puff to puff and cigarette to cigarette consistency.

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2/38 [004] US patents commonly designated by ^QS No. 5,060,671; 5,144,962; 5,372,148; 5,388,594; 5,498,855; 5,499,636; 5,505,214; 5,530,225; 5,591,368; 5,665,262; 5,666,976; 5,666,978; 5,692,291; 5,692,525; 5,708,258; 5,750,964; 5,902,501; 5,915,387; 5,934,289; 5,954,979; 5,967,148; 5,988,176; 6,026,820 and 6,040,560 describe electrical smoking systems and methods of making a cigarette, whose patents are incorporated by reference.

Summary of the Invention [005] The invention provides an electrical smoking system that includes a cigarette and a lighter. The cigarette comprises a tubular tobacco matrix partially filled with tobacco material in order to define a filled tobacco rod portion, the filled tobacco rod portion being adjacent to a cigarette-free end. The cigarette includes a wrapper surrounding the filled tobacco rod portion, the wrapper comprising a cellulosic screen material and at least one filler there, the filler comprising an ammonium-containing compound in an efficient amount to reduce the content of gaseous components in the smoke. tobacco produced by combustion / pyrolysis of the tobacco rod portion. The lighter includes at least one heating blade and a controller adapted to control the heating of the heating blade, the lighter arranged to at least partially receive the cigarette so that the heating blade heats a heating zone of the cigarette, the controller being operable for limit heating of the heating zone to no more than 500 C in order to produce smoke while reducing the content of at least one gas component in tobacco smoke, the at least one gas component including carbon monoxide, 1,3-butadiene, isoprene, acrolein, acrylonitrile, hydrogen cyanide, o-toluidine, 2-naphthalamine, nitrogen oxide, benzene, NNN, phenol, catechol, benz (a) anthracene, and benzo (a) pyrene.

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Brief Description of the Drawings [006] Various features of the present invention are shown in the drawings in which similar numerals indicate similar elements.

[007] Figure 1 is a perspective view of a smoking system according to a preferred embodiment of the present invention with a system cigarette inserted into the electrically operated lighter. [008] Figure 2 is a perspective view of the smoking system in Figure 1, but with the cigarette removed from the lighter upon completion of an act of smoking.

[009] Figure 3A is a partial perspective detail view of portions of the heating accessory of Figure 1, including heating elements of wavy hairpins and portions of a preferred air intake system.

[0010] Figure 3B is a side sectional view of a preferred heating accessory that includes the wavy hairpin elements of Figure 3A.

[0011] Figure 3C is a side view of the cigarette shown in Figure 4 inserted in the heating accessory of Figure 6, with the latter being shown in cross section.

[0012] Figure 4 is a detail perspective view of a preferred embodiment of the cigarette shown in Figure 1, with certain components of the cigarette being partially separated.

[0013] Figure 5 is a block diagram, schematic of a preferred control circuit for a lighter shown in Figures 1 and 2.

[0014] Figure 6 is a cross-sectional side view of the cigarette shown in Figure 4 in which a free end of the cigarette is in contact with a stop piece in the lighter.

[0015] Figures 7 and 8 are graphs showing reduction of several

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4/38 gaseous components of tobacco smoke generated with the smoking system according to the invention Detailed Description of the Preferred Modalities [0016] With reference to Figures 1 and 2, a preferred embodiment of the present invention provides a smoking system 21 that preferably includes a partially filled filter cigarette 23 and a reusable lighter 25. Cigarette 23 is adapted to be inserted into and removed from a cigarette receiver 27 that is opened in a front end portion 29 of the lighter 25. Once the cigarette 23 is inserted, the smoking system 21 is used in much the same way as a more traditional cigarette, but without the ignition or combustion of cigarette 23. Cigarette 23 is discarded after one or more cycles of puffs.

[0017] Preferably, each cigarette 23 provides a total of eight puffs (puffs cycles) or more per act of smoking; however, it is a matter of design to adjust a smaller or larger total number of puffs available. In the preferred embodiment, the cigarette 23 includes at least one peripheral perforation ring 12 located adjacent to the free end 15 of the cigarette 23 and optionally a second perforation ring or rings 14 and optionally a plurality of holes 16 in the lower part of the external cigarette housing 23.

[0018] Lighter 25 includes a box 31 having box, front and rear portions 33 and 35. One or more batteries 35a are removably located within the rear portion of box 35 and supply power to the heater accessory 39 which includes a plurality of electrically resistive heating elements 37 (shown in Figures 3A-C). The heating elements 37 are arranged inside the front box portion 33 to slide the cigarette 23 along an intermediate portion of the cigarette receiver 27. A stop 183 located on the base 300 of the heating accessory 39

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5/38 defines a termination of the TI cigarette receiver.

[0019] A controller includes a control circuit 41 in the front portion of the box 33 that selectively establishes electrical communication between the batteries 35a and one or more heating elements 37 during the execution of each puff cycle. The preferred embodiment of the present invention includes details regarding an air delivery system for effecting the intake and air path within the lighter, including aspects that are discussed in greater detail starting with reference to Figure 3C.

[0020] Still with reference to Figures 1 and 2, preferably the rear portion 35 of the lighter box 31 is adapted to be readily opened and closed, for example, with screws or fitting adjustment components, in order to facilitate the replacement of the batteries. If desired, a socket or electrical contacts can be provided to recharge the batteries in a charger supplied with household current or the like. Preferably, the front housing portion 33 is joined to the rear housing portion 35, for example with a swallow joint or a socket fit.

[0021] Batteries 35a are sized to provide sufficient energy for heaters 37 to function as intended and preferably comprise a replaceable and rechargeable type. Alternating power sources are available, such as capacitors. In the preferred embodiment, the power source comprises four nickel-cadmium battery cells connected in series with a total, uncharged voltage in the range of approximately 4.8 to 5.6 volts. The characteristics of the energy source are, however, selected in view of the characteristics of other components in the smoking system 21, particularly the characteristics of the heating elements 37. US patent commonly designated 5,144,962, incorporated herein by reference , describes different types of

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6/38 energy useful in connection with the smoking system of the present invention, such as rechargeable battery sources and energy arrangements comprising a battery and a capacitor that is recharged by the battery.

[0022] With reference specifically to Figure 2, preferably, circuit 41 is activated by a puff-activated sensor 45 that is sensitive to both pressure changes and changes in the air flow rate that occur upon initiation of a cigarette pull. 23 by a smoker. The puff-activated sensor 45 is preferably located within the front box portion 33 of the lighter 25 and is communicated with a space within the heater accessory 39 adjacent to the cigarette 23 via a port 45a extending through a side wall portion 182 of the accessory heater 39. A puff-triggered sensor 45 suitable for use in the smoking system 21 is described in US patent commonly designated 5,060,671 and US patent 5,388,594, the disclosures of which are incorporated herein by reference. The puff sensor 45 preferably comprises Fujikura Ltda Model FSS-02 PG. Another suitable sensor is a Model 163PCO1D35 silicone sensor, manufactured by MicroSwitch division of Honeywell, Inc., Freeport, Illinois. Flow reading devices, such as those using heated wire anenometry principles, have been successfully demonstrated to be useful for triggering an appropriate heating element 37 upon detecting a change in air flow. Once activated by sensor 45, the control circuit 41 directs the electric current to an appropriate heating element 37.

[0023] An indicator 51 is provided at a location along the outside of the lighter 25, preferably on the front portion of the box 33, to indicate the number of puffs remaining on the smoking of a cigarette 23. Indicator 51 preferably includes a display

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7/38 seven-segment liquid crystal. In the preferred embodiment, the indicator 51 shows a segmented image that correlates with the digit 8 when a cigarette detector 57 detects the presence of a cigarette in the heating accessory 39. The detector 57 preferably comprises an inductive coil 1102 adjacent to the cigarette receiver 27 of the heater accessory 39 and electric waves 1104 that communicate coil 1102 with an oscillating circuit within control circuit 41. Cigarette 23 internally carries a metal foil ring or similar that can affect the coil inductance of coil 1102 so that whenever a cigarette 23 is inserted into the receiver 27, detector 57 generates a signal for circuit 41 indicating that the cigarette is present. Control circuit 41, in turn, provides a signal for indicator 51. The digit 8 display on indicator 51 reflects that the eight puffs supplied on each cigarette 23 are available, that is, no puff cycles have been tried and none of the heating elements 37 has been activated to heat cigarette 23. After cigarette 23 is completely smoked, the indicator shows the digit 0. When cigarette 23 is removed from lighter 25, cigarette detector 57 no longer detects the presence of a cigarette 23 and indicator 51 is turned off.

[0024] The operation and details of the inductive cigarette detector 57 are provided in U.S. patent commonly designated 5,902,501, which is incorporated herein by reference in its entirety. Other detectors may be employed instead of the one described above for detector 57, such as an OPR5005 type light sensor, manufactured by OPTEX Technology, Inc., 1215 West Crosby Road, Carrolton, Texas 75006.

[0025] In the alternative to show the residue from the puff count, the detector's display may, instead, be arranged to indicate whether the system is active or inactive (on or off).

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8/38 [0026] In accordance with one of several possible alternatives to use the cigarette detector noted above 57, a mechanical switch (not shown) can be provided to detect the presence or absence of a cigarette 23 and a reclose button (not shown) ) can be provided to rewire circuit 41 when a new cigarette is inserted into lighter 25, for example, to make indicator 51 show the digit 8, etc. Power sources, circuitry, puff trigger sensors, and indicators useful with the smoking system 21 of the present invention are described in US patents commonly designated by ^QS No. 5,060,671; 5,388,594 and 5,591,368, which are hereby incorporated by reference.

[0027] With reference now to Figures 3A and 3B, the front box portion 33 of the lighter 25 involves a substantially cylindrical heating accessory 39 whose heating elements 37 slide the cigarette 23. The heating accessory 39 is adapted to support a cigarette inserted 23 in a relation fixed to the heating elements 37 so that the heating elements 37 are positioned side by side of the cigarette 23 in approximately the same location along each newly inserted cigarette 23. In the preferred embodiment, the heating accessory 39 includes eight mutually parallel heating elements 37 which are arranged concentrically around the axis of symmetry of the cigarette receiver 27. Locations where each heating element 37 presses against (or is in thermal communication with) a fully inserted cigarette 23 are referred to here as the footprint or heater burn zone 42. In the preferred embodiment, the burn zone may extend closer approximately 14mm in length, starting approximately 9mm from the free end 15 of cigarette 23. Of course, these relationships can be varied between different designs of lighter and cigarette. In another model, for example, zoPetição 870180047568, of 06/04/2018, p. 14/99

9/38 in the burn 42 extends from 12mm to 23mm of the free end of the cigarette 23.

[0028] With reference also to Figure 3C, to ensure consistent location of the heating elements 37 with respect to each cigarette 23 from cigarette to cigarette, the heating accessory 39 is provided with a base portion 300 having a stop piece in the shape of a cup 183 against which the free end 15 of the cigarette 23 is thrown during its insertion in the cigarette receiver 27 of the lighter 25. The cup shape of the stop piece 183 is configured to close (occlude) the free end 15 of the cigarette 23 by means of total insertion of the cigarette 23 so that air cannot be drawn through the free end 15, but instead only along the side walls of the cigarette 23.

[0029] Still with reference to Figures 3A and 3B, more preferably, the heating elements 37 are of a design referred to here as a wavy hair clip heating element 37, wherein each heating element 37 includes at least first and second coils, elongated elements 53a and 53b which are adjacent at an end portion (tip) 54. The tips 54 are adjacent to the opening 55 of the cigarette receiver 27. The opposite ends 56a and 56b of each heating element 37 are electrically connected to the opposite poles of the power source 35a as selectively established by controller 41. More specifically, an electrical path through each heater accessory 37 is established, respectively, through a terminal pin 104, a connection 121 between pin 104 and a free end portion 56a of one of the serpentine elements 53a, through at least a portion of the tip 54 to the other serpentine element 53b and its portion d and end 56b. Preferably, a fully formed common connection ring 110 provides a common electrical connection between

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10/38 all end portions 56b of elongate member 53b. In the preferred embodiment, ring 110 is connected to the positive terminal of the power source 35a (or common) through a connection 123 between ring 110 and a pin 105. Additional details of the construction and establishment of electrical connections in the heating accessory 39 are illustrated and described in US patents commonly designated by ^QS No. 5,060,671; 5,388,594 and 5,591,368, all of which are incorporated by reference. The heating portions 53a, 53b and 54 state that they are referred to herein as a heating blade 120. [0030] Other preferred designs of the heating accessory 39 include heating elements in the form of an uninterrupted hair clip heating elements 37, which are set out in the patent US commonly designated 5,591,368 and each of the single coil heating elements which are established in US patent commonly designated 5,388,594, said patents being incorporated herein by reference in their entirety.

[0031] Additional heating accessories 37 that are operable as part of the lighter 25 include those described in the commonly designated U.S. patent 5,665,262; and U.S. patent commonly designated 5,498,855, all of which are incorporated herein by reference in their entirety.

[0032] Preferably, heaters 37 are individually energized by power source 35a under the control of circuit 41 to heat cigarette 23 preferably eight times spaced around the periphery of cigarette 23. Heating synthesizes eight puffs of cigarette 23, as is commonly achieved with the smoke of a more traditional cigarette. It may be preferred to activate more than one heater simultaneously for one or more or all puffs. [0033] With reference now to Figure 4, cigarette 23 is preferably constructed according to the preferred mode established

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11/38 in U.S. patent commonly designated 5,499,636, hereby incorporated by reference in its entirety.

[0034] With particular reference to Figures 3A, 3B, and 3C, preferably the puff sensor 45 is communicated to the interior of the heating accessory 39 through a port 45a. Preferably, the door 45a is located adjacent to the base portion 300 of the heating accessory 39. Such a location minimizes the risk that the door 45a and adjacent passages leading to it through the body of the heating accessory 39 become clogged by condensed fragments or smoke.

[0035] The heater accessory 39 includes an air inlet port 1200, which communicates with a pipe 1202 which is at least partially defined by a ring 1204 and the receiver body 27. Ring 1204 preferably includes four holes 1206 of approximately 0.736 cm (0.029 inch) in diameter to effect a minimum pressure drop as air is drawn into the lighter through air inlet port 1200 and tubing 1202. The size and number of holes 1206 can be varied, but are configured to provide sufficient pressure drop that by pulling on an inserted cigarette 23, a pressure drop is induced by entering air into the lighter so that the puff sensor 45 is operative to recognize the start of a puff. In the preferred embodiment, holes 1206 of ring 1204 induce an RTD of approximately 25mm of water, more or less than 5mm. The pressure drop range induced in ring 1204 could be selected so that it is within the pressure drop range detectable by the pressure sensor 45, but minimized for such a need so that the desired RTD residue (Pull Resistance) ) is performed predominantly by cigarette 23. In the preferred modality, a large total of RTD of 10.16 to 12.70 centimeters (4 to 5 polePetition 870180047568, from 06/04/2018, page 17/99

12/38 g) of water (from 100 to 130 mm of water) is desired and approximately 25 mm of this is produced in ring 1204. In this way, the RTD of cigarette 23 is preferably in the range of approximately 75 to 105 mm of water in RTD, when inserted in lighter 25 and the induced pressure drop of lighter 25 is approximately 25mm of water. The adjustment of the RTD in the cigarette according to the present invention includes provision and adjustment of the number and extent of perforations 12 (and optionally 14) in the full portion 88 of the cigarette 23.

[0036] Advantageously, the holes 1206 of the ring 1204, being located adjacent to the receiver 27, are positioned away from sources of fragments and whose condensations may otherwise tend to clog the holes 1206.

[0037] The air that was pulled into the lighter by initiating a puff enters the cigarette side with a substantial longitudinal (axial) velocity component towards the base portion 300 of the heater accessory 300. It has been found that a deflector of annular air flow or precipitator 1210 adjacent to the base portion 300 intensified the smoke (distribution) outflow from the system 21 directing at least one air intake portion back towards the inserted cigarette 23. No desire to be limited in theory, it is believed that annular air precipitator 1210 tends to direct airflow towards regions of cigarette 23 supporting perforations 12. Preferably, annular air precipitator 1210 is located with respect to a fully inserted cigarette 23 so that the annular air precipitator annular air precipitator 1210 circumscribes the general location of the perforations 12 along the cigarette 23.

[0038] It has been found that the operation of the annular air precipitator 1210 is improved if it is constructed of metal, or alternatively, all portions of the body of the heater attachment 39 are constructed of a metal such as stainless steel, or at least

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13/38 such portions of the heating accessory 39 which are disposed adjacent to an inserted cigarette 23. Such provision may provide an increase in distribution of 1 mg of TPM (FTC).

[0039] Cigarette 23 comprises a tobacco rod 60 and a filter tip 62, which are bonded with tip paper 64. The tobacco rod 60 of cigarette 23 preferably includes a tobacco web or matrix 66 which has been folded in such a way tubular (cylindrical) around the free flow filter 74 at one end and a tobacco plug 80 at the other. Alternatively, a cellulose acetate plug should be used in place of tobacco plug 80. The longitudinal (axial) extension of tobacco plug 80 defines a tobacco-filled portion 88 of the partially filled cigarette 23.

[0040] An excess blanket 71 is intimately wrapped around the tobacco screen 66 and is attached together along a longitudinal seam as is common in the construction of more traditional cigarettes. The surplus blanket 71 holds the tobacco web 66 in a condition wrapped around a free flow filter 74 and a tobacco plug 80.

[0041] The tobacco web 66 itself preferably comprises a base web 68 and a layer of tobacco material 70 located along the inner surface of the base web 68. Like the sloping end of the tobacco rod 60, the tobacco web 66 together with the surplus blanket 71 are wrapped around a free flow filter tubular plug 74. Preferably, the tobacco plug 80 is constructed separately from the tobacco screen 66 and comprises a relatively short cut tobacco filler column that preferably it was wrapped inside and retained by a blanket of buffer 84.

[0042] As a general matter, the length of the tobacco plug 80 is preferably adjusted with respect to the total length of the tobacco rod 60 so that a void 90 is established at the

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14/38 along the tobacco rod 60 between the free flow filter 74 and the tobacco plug 80. The void 90 corresponds to an unfilled portion of the tobacco rod 60 and is in immediate fluid communication with the tip 62 through the filter flow rate 74 of tobacco bar 60.

[0043] Tip 62 preferably comprises a free flow filter 92 located adjacent tobacco rod 60 and a nozzle filter plug 94 at the distal end of tip 62 of tobacco rod 60. Preferably, free flow filter 92 is tubular and transmits air with very little pressure drop. Other low-efficiency filters of standard configuration could, however, be used instead. The internal diameter for the free flow filter 92 is preferably at or between 2 to 6 mm and is preferably larger than that of the free flow filter 74 of the tobacco bar 60.

[0044] Nozzle filter plug 94 closes the free end of tip 62 for appearance purposes and, if desired, to perform some filtration, although it is preferred that nozzle filter plug 94 comprises a low efficiency filter of preferably about 15 to 25 percent efficiency.

[0045] Still referring to Figure 4, preferably, the partially filled cigarette 23 includes at least one row of perforations 12 at the location adjacent to the free end 15 of the tobacco rod portion of cigarette 23. Preferably, the row of perforations 12 is twelve holes in the bead and can be formed as slots 17 (perforation / hole) in a 400 microsecond pulse width adjustment of a Model Hauni 500-1 in-line laser perforator system. Each perforation / hole 17 of the row of perforations 12 preferably extends through the outer shell 71, through the tobacco matrix 66 and the buffer mat 84.

[0046] With reference now also to Figure 2, preferably, the row of perforations 12 is located at or adjacent to the portion of

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15/38 end 42a of the burn zone 42. Such an arrangement is believed to promote the entry of heated air into tobacco plug 80 and create other additional favorable effects through pyrolysis during the puff cycle so that the distribution (TPM- FTC) is intensified.

[0047] For further improved distribution, additional row or rows of perforations 14 comprising perforations - holes 17 as previously described can be provided at a location along the full portion 88 of the tobacco bar 60, preferably at an overlapping location, or at least partially superimposed, by the heater footprint or burn zone 42 and / or alternatively, adjacent to the free end 15 of the cigarette 23. In the last alternating embodiment, the second row of perforations 14 is established at approximately 4mm from the free end 15 of the cigarette 23. Either or both of the rows of holes 12 or 14 can comprise a single row or a double row of holes-holes 17.

[0048] The number and extent of drill-holes 17 are resolved according to two compensation considerations. The addition of perforation rows 12, 14 as described above contributes to intensifying cigarette distribution 23. However, each additional perforation row 12, 14 reduces RTD along the side walls of cigarettes 23. Preferably, the large total of RTD of the electric smoking system 21 should provide the smoker with a resistance to pull approximately the same as that experience with traditional cigarettes of approximately 10.16 to 12.70 centimeters (4 to 5 inches) of water (approximately 100-130m of water) or so, 80130mm of water.

[0049] It was verified that in a total energy input of 23.8 Joules for a heating element 37, a cigarette 23 supporting a double row of perforations 12 in a 12mm location of EXPetition 870180047568, of 06/04/2018, pg . 21/99

16/38 cigarette free tremor 15 (double rows of 12 holes each) can produce distributions substantially greater than 3 milligrams of TPM (FTC). Additional distributions can be obtained by adding a second row or rows of holes 14.

[0050] However, each additional row of perforations-holes 17 reduces the RTD, which is preferably to remain in or above 100mm of water for the total system 21. Should anyone verify that for a given cigarette 23, an additional distribution is desired even if the RTD level is approaching its lower limit, an additional distribution can be obtained by providing a plurality of circumferentially spaced holes 16 placed in the matrix 66 itself. Preferably, the holes in the matrix 16 are each approximately 1 mm in diameter and preferably 6 in number so that the tensile strength requirement of belt material 66 is maintained and can withstand machine fabrication. The orifices of the die can be formed with apparatus as described in U.S. Patent 5,666,976, the patent of which is incorporated herein by reference in its entirety.

[0051] Preferably, the holes 16 in the die 66 are covered by the outer shell 71. Preferably, any row of perforations 12, 14 is moved away from the location of the die row of the die 16 so that they do not overlap. In a preferred embodiment, the holes in the die 16 are located approximately 7mm from the free end 15 of the cigarette 23, and a double row of perforations 12 is established approximately 12mm from the end 15 of the cigarette 23. Then disposed, the cigarette obtains a TPM (FTC) of 6mg or more. Advantageously, the holes in the die 16 can contribute an additional distribution to the cigarette 23 without the same extent of reduction in RTD as is experienced with each addition of the row of perforations-holes 17. Therefore, someone

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17/38 can use the perforation rows 12, 14 to approximate desired levels of distribution for cigarette 23, with the holes in the die 16 being used to adjust or increase the distribution with a lesser effect on RTD.

[0052] More traditional cigarettes exhibit a pull resistance (RTD) of approximately 80mm to 130mm of water. The lighter of the electrical smoking system according to the present invention when tested without a cigarette exhibits an RTD of approximately 20-30mm of water. Cigarettes according to the present invention having laser perforations and matrix holes as taught here exhibit an RTD of approximately 20-30mm of water when pulled by themselves (outside the electric cigarette lighter), but when inserted, the electrical smoking system (the lighter and the cigarette completely inserted) generates an RTD of approximately 50-75mm of water.

[0053] With reference now to Figures 2 and 5, the electrical control circuit 41 of the lighter 25 includes a logic circuit 195, which preferably comprises a microcontroller or a specific application, integrated circuit (or ASIC). The control circuit also includes the cigarette sensor 57 to detect the insertion of a cigarette 23 into the cigarette receiver 27 of the lighter 25, the puff sensor 45 to detect a pull through the inserted cigarette 23, the LCD indicator 51 to indicate the number of puffs remaining on a cigarette, power source 35a and timing network 197.

[0054] The logic circuit 195 can comprise any conventional circuit capable of implementing the functions discussed here. A programmable field gate formation (for example, an ACTEL A1280A FPGA PQFP 160 type, available from Actel Corporation, Sunnyvale, California) or a microcontroller can be programmed to perform digital logic functions with analogous functions. / 2018, p. 23/99

18/38 by other components. An ASIC or microcontroller can perform both analog and digital functions on a component. Control circuit and logic circuit characteristics similar to control circuit 41 and logic circuit 195 of the present invention are described, for example, in US patents commonly designated by ^QS No. 5,388,594; 5,505,214; 5,591,368; and 5,499,636, which are incorporated herein by reference in their entirety. Additional details are also provided in US patent 6,040,560, which is incorporated herein by reference in its entirety.

[0055] In the preferred embodiment, eight individual heating elements 37 are connected to a positive terminal of the power source 35a and to the ground through field effect transistor heater (FET) switches 201-208. The individual (or selected) heater switches 201-208 will connect under control of logic circuit 195 through terminals 211-218, respectively, during the execution of a power cycle through logic circuit 195. Logic circuit 195 provides signals to activate and deactivating particulars of the heater switches 201-208 to activate and deactivate the corresponding heating element 37 of the heating accessory 39.

[0056] Logic circuit 195 cooperates with timing circuit 197 to precisely perform the activation and deactivation of each heating element 37 according to a predetermined total cycle period (Ttotai) and to precisely divide each total cycle period into a predetermined one number of phases, with each phase having its own predetermined period of time (phase). In the preferred embodiment, the total cycle time Ttotai was selected to be 1.6 seconds (in order to be less than the two-second duration normally associated with a pull on a smoker's cigarette, plus provision for margin) and the total Ttotai cycle period is divided

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19/38 preferably in two phases, a first phase having a predetermined time period (phase 1) of 1.0 second and a second phase having a predetermined time period (phase 2) of 0.6 second. The total cycle time Ttotai, the total number of phases and the respective phase periods are parameters, among others, which are solved according to the teachings that follow to establish within the control circuit 41, an ability to execute a cycle of energy that precisely duplicates a preferred thermal interaction (thermal profile or thermistogram) between the respective heating element 37 and adjacent portions of the cigarette 23. In addition, once the thermistogram is established, certain parameters (preferably rate cycles within each phase) they are dynamically established by the control circuit 41 in order to precisely duplicate the predetermined thermo-histogram with the entire energy cycle through the voltage range Vi „terminated by the battery discharge cycle mentioned above.

[0057] The puff-triggered sensor 45 provides a signal to logic circuit 195 that is indicative of smoker activation (ie, a continuous drop in pressure or air flow over a sufficiently sustained period of time). Logic circuit 195 includes a jump suppression routine to distinguish between minor variations in air pressure and more sustained pulls on the cigarette to prevent inadvertent activation of heating elements in response to the wrong signal from the puff-triggered sensor 45. The puff-triggered sensor 45 may include a piezo-resistive pressure sensor or a flap sensor that is used to drive an operational amplifier, the output of which is, in turn, used to provide a logic signal for logic circuit 195. Puff-activated sensors suitable for Use in connection with the smoking system include a silicone sensor Model 163PC01D35, manufactured by the MicroSwitch division of HoPetição 870180047568, from 04/06/2018, pg. 25/99

20/38 neywell, Inc. Freeport, 111., or a sensor of type SLP004D, available from SenSym Incorporated, Sunnyvale, California.

[0058] The cigarette sensor 57 is located on the cigarette receiver 27 and provides a signal to the logic circuit 195 which is indicative of inserting a cigarette 23 into the lighter 25. Optionally, a second sensor can be located adjacent to the stop 183 in order determine whether the cigarette has been fully inserted into the receiver 27.

[0059] In order to conserve energy, it is preferable for the puff-triggered sensor 45 and the cigarette sensor 57 to be cycled, on and off, in low rate cycles (for example, from about a 2 to 10%). For example, it is preferred that the puff-triggered sensor 45 be turned on for a duration of 1 millisecond every 10 milliseconds. If, for example, the puff-triggered sensor 45 detects a pressure drop or airflow indicative of a cigarette pull during four consecutive pulses (that is, in addition to a 40-millisecond period), the puff-triggered sensor sends a signal through a terminal 221 to logic circuit 195. Logic circuit 195 then sends a signal through an appropriate terminal 211-218 to turn an appropriate one of the FET heater switches 201-208 ON.

[0060] Similarly, cigarette sensor 57 is preferably turned on for a duration of 1 millisecond every 10 milliseconds. If, for example, cigarette sensor 57 detects four consecutive reflective pulses, indicating the presence of a cigarette 23 in lighter 25, the light sensor sends a signal through terminal 223 to logic circuit 195. Logic circuit 195 then sends a signal through terminal 225 to puff trigger sensor 45 to connect puff trigger sensor. Logic circuit 195 also sends a signal through terminal 227 to indicator 51 to switch it on. The modulation techniques noted above reduce the average time of the current

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21/38 required by the puff-triggered sensor 45 and the cigarette sensor 57, and thereby extend the life of the energy source 37.

[0061] Logic circuit 195 includes a PROM (programmable read-only memory) 301, which preferably includes at least two databases or conference tables 302 and 304 and, optionally, a third database (conference table) 306 and possibly a fourth conference table 307. Each conference table 302, 304 (and optionally 306, 307) converts a battery voltage signal Vi _n to a rate cycle signal (I gave for the first phase and dC2 for the second phase) to be used in the execution of the respective phase of the immediate energy cycle. The third and fourth conference tables 306 and 307 work similarly.

[0062] Upon initiation of a power cycle, the logic circuit receives a signal indicating battery voltage ví „, and then references to the immediate reading Vin for the first conference table 302 to establish a rate cycle I gave for the initiation of the first phase of the energy cycle. The first phase is continued until the timing network 197 provides a signal indicating that the predetermined period of time for the first phase (phase 1) has expired, as a result of which logic circuit references 195 see and the second conference table 304 establish a dC2 rate cycle for the initiation of the second phase. The second phase is continued until the timing network 197 provides a signal indicating that the predetermined time period of the second phase (phase 2) has expired, after which the timing network 197 provides a shutdown signal for logic circuit 195 at terminal 229. Optionally, logic circuit 195 could start the third phase and establish a third dC3 rate cycle, and the shutdown signal would not be generated until the predetermined period of the third phase (phase 3) has expired. A similar regime poPetição 870180047568, of 06/04/2018, p. 27/99

22/38 could optionally be established with a fourth phase (phase 4). The present invention could also be practiced with additional stages.

[0063] Although the present invention can be practiced by limiting the reference to the conference tables to an initial portion of each phase to establish a rate cycle to be applied through the substantial totality of each phase, a refinement and the preferred practice is to have the logic circuit 195 configured to continue the reference Vm together with the respective conference tables 302, 303, 306 and 307 in order to dynamically adjust the set of values for the rate cycles in response to fluctuations in battery voltage according to the control circuit progresses through each stage. Such a device provides a more accurate repetition of the desired thermistrogram.

[0064] Other timing network circuit configurations and logic circuits can also be used, such as those described in US patents commonly designated by ^QS 5,388,594; 5,505,214; 5,591,368; 5,499,636 and 5,372,148, which are incorporated herein by reference in their entirety.

[0065] During operation, a cigarette 23 is inserted into the lighter 25 and the presence of the cigarette is detected by the cigarette sensor 57. The cigarette sensor 57 sends a signal to the logic circuit 195 through terminal 223. The logic circuit 195 certifies if power source 35a is charged or if the immediate voltage is below an acceptable minimum Vin min. If, after inserting a cigarette 23 in the lighter 25, the logic circuit 195 detects that the voltage of the power source 35a is too low, below Vin min, Indicator 51 flashes and an additional operation of the lighter will be blocked until the source of energy 35a to be recharged or replaced. The voltage of the power source 35a is also monitored during the ignition of the heating elements 37 and the heating of the heating elements 37 is interrupted

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23/38 if the voltage drops below a predetermined value.

[0066] If power source 35a is charged and the voltage is sufficient, logic circuit 195 sends a signal through terminal 225 to puff sensor 45 to determine if a smoker is pulling cigarette 23. At the same time, the logic circuit 195 sends a signal through terminal 227 to indicator 51 so that the LCD will show the digit 8, reflecting that eight puffs are available. [0067] When logic circuit 195 receives a signal through terminal 221 of the puff-triggered sensor 45 that a sustained pressure drop or flow has been detected, logic circuit 195 sends a signal through terminal 231 to the timing network 197 to activate the timing network, which then begins to operate phase by phase in the manner previously described. Logic circuit 195 also determines, by a low counting routine, that one of the eight heating elements must be heated and sends a signal through an appropriate terminal 211-218 to turn an appropriate one of the FET 201-208 heater switches ON . The appropriate heater remains on while the timer is running. [0068] When the timing network 197 sends a signal through terminal 229 to logic circuit 195 indicating that the timer has stopped running, the private FET heater switch 211-218 that is ON, is turned to OFF, thereby removing power of the particular heating element 37. Logic circuit 195 also counts and sends a signal to indicator 51 through terminal 227 so that the indicator will show that one less puff remains (for example, 7, after the first puff). When the next smoker puffs on cigarette 23, logic circuit 195 will turn to ON another predetermined one of the FET heater switches 211-218, thereby supplying energy to another predetermined one of the heating elements. PROPETITION 870180047568, of 06/04/2018, p. 29/99

The procedure will be repeated until indicator 51 shows 0, meaning that there are no more puffs remaining on cigarette 23. When cigarette 23 is removed from lighter 25, cigarette sensor 57 indicates that there is no cigarette present, and the logic circuit 195 is rewired.

[0069] Other features, such as those described in US Patent No. ^QS 5,505,214; 5,388,594 and 5,372,148 which are incorporated herein by reference, can be incorporated into control circuit 41 instead of or in addition to the features described above. For example, if desired, several disabling features can be provided. One type of disable feature includes a stopwatch circuit (not shown) to prevent successive puffs from occurring well together, so that power source 35a has time to recover. Another disabling feature includes a device for disabling heating elements 37 if an unauthorized product is inserted into heating accessory 39. For example, cigarette 23 may be provided with an identification feature that lighter 25 must recognize before heating elements 37 be energized.

[0070] With reference now to Figure 6, cigarette 23, as constructed according to the preferred embodiment of the present invention, comprises a tobacco rod 60 and a filter tip 62, which are bonded with tip paper 64. During cigarette manufacture, perforation holes 263 can be provided at one or more locations on the outer surface of the tobacco rod 60.

[0071] The partially filled filter cigarette 23 preferably has an essentially constant diameter throughout its length and, like most traditional cigarettes, is preferably between approximately 7.5mm and 8.5mm in diameter so that the smoking system 21 provides the smoker with a familiar mouth taste. In the preferred embodiment, cigarette 23 is approximately 62mm

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25/38 in total length, thereby facilitating the use of conventional packaging machines in the packaging of cigarettes 23. The combined length of the nozzle filter 94 and the free flow filter 92 is preferably 30mm. The tip paper preferably extends approximately 6mm over the tobacco rod 60. The total length of the tobacco rod 60 is preferably 32mm. Other proportions, lengths and diameters can be selected instead of those mentioned above for the preferred modality.

[0072] Tobacco bar 60 of cigarette 23 preferably includes a tobacco screen or matrix 66 which has been folded into a tubular (cylindrical) shape.

[0073] A surplus 71 closely wraps the tobacco screen 66 and is attached together along a longitudinal seam as is common in building more traditional cigarettes. The surplus blanket 71 holds the tobacco web 66 in a condition wrapped around a free flow filter 74 and a tobacco plug 80.

[0074] Preferably, the surplus blanket paper of cigarette 71 is wrapped closely around tobacco screen 66 in order to synthesize the external appearance and taste of a more traditional cigarette. It has been found that a better smoking taste is obtained when the surplus blanket paper 71 is a standard type of cigarette paper, preferably a linen fiber paper of approximately 20 to 50 CORESTA (defined as an amount of air, measured in centimeters cubic, which passes through a square centimeter of material, for example, a sheet of paper, in a minute at a pressure drop of 1.0 kilopascals) and more preferably from about 30 to 45 CORESTA, a base weight of approximately 23 to 35 grams per square meter (g / m ² ) and more preferably about 23 to 30 g / m ² , and a filling charge of approximately 23 to 35% by weight and more preferably 28 to 33% by weight. The blanket paper exPetition 870180047568, dated 06/04/2018, p. 31/99

26/38 assignor 71 preferably contains little or no citrate or other burning modifiers, with preferred levels of citrate ranging from 0 to approximately 2.6% by weight of the surplus blanket paper 71 and more preferably less than 1%.

[0075] The tobacco web 66 itself preferably comprises a base web 68 and a layer of tobacco material 70 located along the inner surface of the base web 68. At the inclined end 72 of the tobacco rod 60, the tobacco web 66 along with the surplus blanket 71 are wrapped around the tubular free flow filter plug 74. The free flow filter 74 (also known in the art as continuous hiss plugs) provides structural definition and support at the sloping end 72 of the tobacco rod 60 and allows the aerosol to be removed from inside the tobacco rod 60 with a minimum pressure drop. The free flow filter 74 also acts as a flow constriction at the sloping end 72 of the tobacco rod 60, which is believed to help promote aerosol formation during a cigarette pull 23. The free flow filter is preferably at least 7 mm long to facilitate handling on the machine and is preferably void, although other conformations and types of low efficiency filters are suitable, including cylindrical filter plugs.

[0076] At the free end 78 of the tobacco rod 60, the tobacco web 66 together with the surplus blanket 71 are wrapped around the cylindrical tobacco plug 80. Preferably, the tobacco plug 80 is constructed separately from the tobacco web 66 and comprises a relatively short column of cut tobacco filler that has been wrapped inside and retained by a buffer mat 84.

[0077] Preferably the tobacco plug 80 is constructed on a conventional cigarette bar making machine in which the cut filler (preferably mixed) is air formed in a

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27/38 continuous tobacco rod on a travel belt and dragged with a continuous strip of buffer blanket 84 which is then glued along its longitudinal seam and heat sealed. According to the preferred embodiment of the present invention, the buffer mat 84 is preferably constructed of a cellulose web with little or no filling, sizing or firing additives (each at levels below 0.5% by weight) and preferably little or no scaling. Preferably, the tobacco buffer blanket 84 has a low base weight, below 15 grams per square meter and more preferably about 13 grams per square meter. Tobacco buffer blanket 84 preferably has a high permeability in the range of about 20,000 to 35,000 CORESTA and more preferably in the range of about 25,000 to 35,000 CORESTA, and is preferably constructed of softwood fiber pulp, abaca-type cellulose or another long fibrous pulp. Such papers are available from Papierfabrik Schoeller and Hoescht GMBH, Postfach 1155, D-76584, Gernsback, GERMANY; another paper suitable for use as buffer blanket 84 is the TW 2000 paper from DeMauduit from Euimperle FRANCE, with the addition of carboxymethyl cellulose at a percentage level of 2.5 by weight.

[0078] The tobacco bar making machine is operated to provide a tobacco bar density of approximately 0.17 to 0.30 grams per cubic centimeter (g / cc), but more preferably in a range of at least 0.20 to 0.30 g / cc and more preferably between about 0.24 to 0.28 g / cc. High densities are preferred to prevent the occurrence of loose ends at the free end 78 of tobacco bar 60. However, it should be understood that bar densities will allow tobacco column 82 to contribute to a greater proportion of aerosol and aroma to the smoke. Therefore, a balance must be struck between the distribution of aerosol

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28/38 (which favors a low bar density in the tobacco column 82) and to prevent the occurrence of loose ends (which favor the high ranges of bar densities).

[0079] Tobacco column 82 preferably comprises a filler cut from a typical industry tobacco blend, including mixtures comprising bright, Burley and oriental tobacco along with, optionally, constituted tobacco and other blending components, including traditional cigarette flavorings . However, in the preferred embodiment, the cut filler of the tobacco column 84 comprises a mixture of brilliant, Burley and oriental in the ratio of approximately 45:30:25 for the American market, without the inclusion of reconstituted tobacco or any flavor after the cut. Optionally, an expanded tobacco component must be included in the mix to adjust the density of the bar, and flavors can be added.

[0080] The continuous tobacco rod formed as described above is sliced according to a predetermined length of buffer for tobacco plug 80. This length is preferably at least 7mm in order to facilitate handling in the machine. However, the length can vary from about 7mm to 25mm or more depending on the preferences in cigarette design that will become apparent in the description that follows, with particular reference to Figure 7.

[0081] As a general matter, the length of the tobacco plug 80 is preferably adjusted with respect to the total length of the tobacco rod 60 so that a void 91 is defined along the tobacco rod 60 between the free flow filter 74 and the tobacco plug 80. The void 91 corresponds to an unfilled portion of the tobacco rod 60 and is in immediate fluid communication with a tip 62 through the free flow filter 74 of the tobacco rod 60.

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29/38 [0082] With particular reference to Figure 6, the length of the tobacco plug and its relative position along the tobacco rod 60 are also selected in relation to the characteristics of the heating elements 37. When a cigarette is properly positioned against a stop 182 inside lighter 25, a portion 93 of each heating element 37 will contact tobacco rod 60 along a region of tobacco rod 60. That contact region is referred to as a heater footprint 95. The heater footprint 95 (as shown with a double arrow in Figure 2) is not part of the cigarette structure itself, but rather a representation of that region of the tobacco bar 60 where the heating element 37 would be expected to reach operating heating temperatures during the act of smoking cigarette 23. Because the heating elements 37 are at a fixed distance 96 from the stop 182 of the heating accessory, the heating footprint 95 is located nistly along the tobacco rod 60 at the same predetermined distance 96 from the free end 78 of the tobacco rod 60 for every cigarette 23 that is completely inserted into the lighter 25.

[0083] Preferably, the length of the tobacco plug 80, the length of the heater footprint 95 and the distance between the heater footprint 95 and the stop 182 are selected so that the heater footprint 95 extends beyond the tobacco plug 80 and superimposes a portion of void 91 by a distance 98. The distance 98 by which heater footprint 95 superimposes void 91 (the unfilled portion of tobacco bar 60) is also referred to as void-heater overlay 98 ). The distance by which the residue from the heater footprint 95 overlaps the tobacco plug 80 is referred to as the heater-overlay 99.

[0084] The tip 62 preferably comprises a free flow filter 92 located adjacent to the tobacco rod 60 and a filPetition buffer 870180047568, of 06/04/2018, pg. 35/99

30/38 nozzle section 94 at the distal end of the tip 62 of the tobacco rod 60. Preferably the free flow filter 92 is tubular and transmits air with very little pressure drop. Other low-efficiency filters of standard configuration could, however, be used instead. The internal diameter of the free flow filter 92 is preferably at or between 2 to 6 millimeters and is preferably larger than that of the free flow filter 74 of the tobacco rod 60.

[0085] Nozzle filter plug 94 closes the free end of tip 62 for appearance purposes and, if desired, to perform some filtration, although it is preferred that nozzle filter plug 94 comprises a low efficiency filter preferably about 15 to 25 percent efficiency.

[0086] The free flow filter 92 and the nozzle filter plug 94 are preferably joined as a buffer combined with a buffer mat 101. The buffer mat 101 is preferably a porous, low weight mat as conventionally available to those in the art of cigarette making. The combined plug is attached to the tobacco rod 60 by the role of the tip 64 of specifications that are standard and conventionally used throughout the cigarette industry. The edge paper 64 can be either cork, white or any other color as the decorative preferences should suggest.

[0087] Preferably, a cigarette 23 constructed in accordance with the preferred embodiment has an overall length of approximately 62mm, of which 30mm comprises the combined end cap 62. Therefore, the tobacco rod 60 is 32mm in length. Preferably, the free flow filter 74 of the tobacco rod 60 is at least 7mm long and the void 91 between the free flow filter 74 and the tobacco plug 80 is preferably at least 7mm long. In the preferred mode, the footprint heatsPetition 870180047568, of 06/04/2018, p. 36/99

31/38 pain 95 is approximately 12mm long and is located so that it provides a 3mm heater-overlap 98 overlay, leaving 9mm of heater footprint 95 overlapping tobacco plug 80.

[0088] It should be understood that the length of the void 91, the length of the tobacco plug 80, and the distribution of the perforation holes 263 can be adjusted to facilitate manufacturing and more importantly, adjust the smoking characteristics of the cigarette 23, including adjustments in taste, pull and distribution. The orifice pattern 263, the void length 91 and the amount of fill-heater overlap (and heater-empty overlap) can also be manipulated to adjust the response immediacy, to promote consistency in distribution (on a puff-puffed basis) as well as between cigarettes) and to control aerosol condensation in or around heaters.

[0089] In the preferred embodiment, the void 91 (non-filling portion of tobacco bar 60) extends approximately 7mm to ensure void space between the heater footprint 95 and the free flow filter 74. In this way, a margin is provided so that the heater footprint 95 does not heat the free flow filter 74 during smoking. Other lengths are suitable, for example, if manufacturing tolerances allow, the void 91 to be configured as short as approximately 4mm or less, or at the other end, extended well beyond 7mm in order to establish a fill-free portion along the bar of tobacco 60. The preferred length range for the fill-free portion (void 91) is approximately 4mm to 18mm and more preferably 5 to 12mm.

[0090] In another embodiment, a cigarette 23 has a total length of approximately 68mm, of which 36mm comprises the combined cap of the tip 62. Consequently, the

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32/38 tobacco 60 is 32mm long. Preferably, the free flow filter 74 of the tobacco rod 60 is at least 13mm long and the void 91 between the free flow filter 74 and the tobacco plug 80 is preferably at least 7mm long.

[0091] Regardless of the length of the cigarette, the cigarette may include filter material, for example, the void may contain filter material such as activated carbon, flavored carbon, silica gel particles, or other filter material. Also, the controller can be programmed to operate the heating accessory in order to heat the cigarette by inserting it in the EHCSS. For example, the control circuit can be operable to cause energy distribution to the heater diffusers (for example, about 5-6 Joules) to thereby heat the cigarette so that the mixture moves from the wrapper to the central portion of the cigarette.

[0092] During the act of smoking the cigarette, the controller preferably activates one of the heating blades to apply heat to a heating zone along the outer periphery of the cigarette. For example, the zone can vary in size from 3 to 25mm ² as mentioned in US patent commonly designated 5,750,964 incorporated herein by reference. A preferred heating zone for a cigarette having an ammonium-containing compound filler there is a length of 10 to 20mm and covers an area of 10 to 20mm ² and the preferred amount of heat applied to the heat sheet according to a programmed power cycle is 15 to 40 Joules, preferably 20 to 35 Joules. With such heating, the heating zone can be heated to a temperature of up to 500 C and the tobacco matrix can be heated to a temperature of about 200 to 350 C, preferably from 220 to 320 C. Due to the heating resistance of the blade heating, the blade temperature can be somewhat lower at each longitudinal end

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33/38 of it, for example, the temperature of the blade can be 25 to 50Ό higher in the central portion of the blade when the blade reaches its maximum temperature.

[0093] It has been found that the controlled heating of the heated blade in combination with the use of a cigarette wrapper having ammonium-containing compound filling results in the reduction of various constituents of tobacco smoke. A preferred ammonium-containing compound filler is magnesium ammonium phosphate (AMP) and the heating blade is preferably supplied with 20 to 35 Joules of energy according to the programmed energy cycle mentioned above when activated by the controller. A preferred temperature of the tobacco matrix along the heating zone during heating a heating blade is 200 to 400 °, more preferably 220 to 320 °. Also, it is preferred that the cigarette includes laser perforations and / or die holes as discussed above. In addition, it is preferred that the EHCSS obstructs the free end of the cigarette to minimize the flow of ambient air to the free end and includes a rapid drop of air to direct the ambient air towards laser perforations and / or die holes. as discussed above.

[0094] According to the invention, the EHCSS is used to smoke a cigarette in which the cigarette wrapper includes ammonium-containing compound filler such as ammonium magnesium phosphate (AMP), preferably the AMP monohydrate form in an effective amount for reduce the contents of a plurality of gaseous components in the smoke produced by cigarette combustion / pyrolysis. Compared to cigarette paper in which calcium carbonate is the single filler, when the ammonium-containing compound filler is used it is possible to reduce the amounts of gas constituents in the mainstream smoke of the smoking system, such constituents include 870180047568, from 06/04/2018, p. 39/99

34/38 going aldehydes (eg formaldehyde, acetaldehyde, propionaldehyde), carbon monoxide, 1,3-butadiene, isoprene, acrolein, acrylonitrile, hydrogen cyanide, o-toluidine, 2-naphthylamine, nitrogen oxide, benzene, NNN, phenol, catechol, benz (a) anthracene, and benzo (a) pyrene, etc. [0095] Figures 7-8 show results of relative measurements of tobacco smoke constituents produced in an EHCSS using cigarettes filled with ammonium-containing compound (ie, the AMP monohydrate form) compared to the CaCO3 filler. As shown, the overall levels of smoke constituents such as PMS, tar and water are substantially the same for both cigarettes since the levels of nicotine and acrolein are somewhat reduced and the remaining constituents are dramatically reduced for the filling of compound containing ammonium. One constituent that was not reduced in the tests was 2-nitropropane. Also, although not shown in Figures 7-8, ammonia levels in tobacco smoke are high for filling ammonium-containing compounds. [0096] When compared to a conventional soft standard reference cigarette (1R4F), the electrically heated cigarette according to the invention with magnesium ammonium phosphate (AMP) incorporated in the paper wrapper produces approximately 90% of lower concentrations of carbon monoxide, 1,3-butadiene, acrylonitrile, benzene, and benzo (a) pyrene on a TPM per mg basis compared to the conventional soft standard reference cigarette (1R4F). Aldehydes were 40% lower (one exception, formaldehyde, was 75% higher).

[0097] The wrapper according to the invention can be manufactured by the conventional papermaking process in which a filling, of low solubility, effective in reducing the content of gaseous components in the smoke is added both by itself and as a mixture with other filler materials for a cellulosic material containing slurry.

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35/38 [0098] The AMP monohydrate form (MgNhUPO ^ xzHO where x is 1) has a low solubility in water in order to be compatible with conventional papermaking processes, for example, the filling is substantially insoluble in an aqueous dispersion containing paper ingredients such as linen, etc. That is, the ammonium-containing compound filler is stable enough in a papermaking process to survive intact as a filler in the final paper product. This includes sufficient thermal stability to survive the drying steps in the papermaking process. The filling of ammonia-containing compound also involves ammonium during the smoking process while decreasing the content of gaseous constituents such as low molecular weight aldehydes in the smoke. The form of AMP monohydrate (mono-AMP) is also known as dittmarite and can be derived from raw ingredients or converted to the hexavalent form monoform known as struvite. Mono-AMP can be supplied with a range of surface areas, a range of particle sizes (most often in the micron range), have appropriate opacity, have low water solubility (required for papermaking), and possess other properties that are considered desirable in fillers for cigarette papers. For purposes of filling a cigarette paper, the mono-AMP preferably has a particle size below 25 pm, more preferably below 10 pm.

[0099] When used as a filler in the manufacture of EHCSS cigarette wrappers, a preferred amount of the ammonium-containing compound filler is about 10% to about 60% of the final wrapper weight, more preferably about 20% to about 50% by weight. This percentage is referred to as the fill charge. Although the ammonium-containing compound filler is preferably the single filler, it can be mixed

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36/38 with one or more fillers on the paper. In the case of mixtures, a portion, for example, up to 60% by weight, of the filler may comprise one or more inorganic carbonate, inorganic hydroxide, inorganic oxide or inorganic phosphate. Examples of such fillers include, for example, calcium carbonate, magnesium hydroxide, magnesium oxide, magnesium carbonates, and titanium dioxide as well as fillers known in the art.

[00100] The casings containing the ammonium-containing compound filler can have a basis weight between about 15 to about 75 grams per square meter and can have a porosity between about 2 to about 200 cubic centimeters per minute per square centimeter as measured by the CORESTA method (CORESTA units). A preferred base weight is between about 20 to about 50 grams per square meter and the most preferred porosity is between about 10 to about 110 units of CORESTA. A more preferred base weight is between about 25 to about 30 grams per square meter and the most preferred porosity is between about 25 to about 50 units of CORESTA.

[00101] Burning additives such as alkali metal salts of carboxylic acids or phosphoric acids can be applied to the shell to adjust or control the burning rate of the resulting smoke article. For example, firing additives can be applied in amounts ranging from about 2% to about 15% by weight of the wrapper. Examples of burning additives include sodium fumarate, sodium citrate, potassium citrate, potassium succinate, potassium monohydrogen phosphate, and potassium hydrogen phosphate.

[00102] To prepare casings containing ammonium-containing compound filler, conventional cigarette papermaking procedures can be used with the inclusion of an ammonium-containing compound filler in place of or in combination

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37/38 with a conventional cigarette paper filler such as calcium carbonate. Paper wrappers can be made of linen, wood pulp or other plant fibers. In addition, the paper wrappers can be a conventional one wrapping construction, a multi-wrapped construction or a single multilayer blanket construction.

[00103] If the ammonium-containing compound filler comprises the form of magnesium ammonium phosphate monohydrate, it can be incorporated into the cigarette paper as follows. For example, a slurry in the form of magnesium ammonium phosphate monohydrate can be mixed with the feedstock of a paper machine or the slurry can be dried into the particle form (for example powder) and such powder it can be incorporated into the raw material for supplying the paper machine. In order to prevent magnesium ammonium phosphate in the form of monohydrate from turning back into hexahydrate, it is desirable to keep the slurry above 55 acima until it is incorporated directly into the feedstock (preferably heated above 60 C ) heated above 60 C from the paper machine or until the slurry is dried in particle form such as by rapid drying which removes water from the slurry under high temperature conditions. Once dry, the magnesium ammonium phosphate monohydrate form remains stable. The magnesium ammonium phosphate preferably has a particle size in the range of approximately 2m to 8m, more preferably in the range of 2m to 4m.

[00104] It should be understood that the present invention can be incorporated in other specific ways and process use without deviating from the spirit or essential features of the present invention. Therefore, although the invention has been illustrated and described according to several preferred embodiments, it is recognized that it varies Petition 870180047568, of 06/04/2018, p. 43/99

38/38 tions and changes can be made in this regard without deviating from the invention as set out in the claims.

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1/8

Claims (30)

1. An electrical smoking system (21) comprising: a cigarette (23) comprising a tubular tobacco matrix (66) partially filled with tobacco material in order to define a full tobacco rod portion (88), the tobacco portion a full tobacco rod being adjacent a free end (15) of the cigarette, the cigarette including a wrap (71) surrounding the full tobacco rod portion, the wrap comprising a cellulosic web material and at least one filler therein, the filler comprising an ammonium-containing compound to reduce the content of gaseous components in tobacco smoke produced by combustion / pyrolysis of the tobacco rod portion; and a lighter (25) comprising at least one heating blade (37) and a controller (41) adapted to control the heating of the heating blade (37) according to an energy cycle, the lighter (25) arranged for at least least partially receive the cigarette so that the heating blade (37) heats a heating zone (95) of the cigarette, characterized by the fact that the heating zone (95) covers an area of 10 to 20 mm ² and in which the controller (41) is operable to limit the heating of the heating zone (95) to no more than 500Ό and to limit the heating of the heating blade (37) to heat the tubular tobacco matrix (66) adjacent to the zone heating at a temperature of 200Ό to 35 OO by supplying 15 to 40 Joules of energy to the heating blade (37), preferably 20 to 35 Joules, in order to produce tobacco smoke while reducing the hair content of a gaseous component in the tobacco smoke, the at least one component gas including carbon monoxide, 1,3-butadiene, isoprene, acrolein, acrylonitrile, hydrogen cyanide, o-toluidine, 2-naphthalamine, nitrogen oxide, benzene, Petition 870180047568, of 06/04/2018, p. 45/99 2/8 NNN, phenol, catechol, benz (a) anthracene, and benzo (a) pyrene. 2. Electric smoking system (21) according to claim 1, characterized by the fact that the controller limits the heating of the heating zone to a temperature not greater than 450Ό. Electric smoking system (21) according to claim 1, characterized in that the lighter (25) includes a heating accessory (39) having a plurality of heating blades (37) and a socket (183) that blocks an axial end of the tobacco rod portion (88). Electric smoking system (21) according to claim 1, characterized in that the cigarette (23) includes a perforation zone (12) spaced from the free end (15) of the tobacco rod portion (88) . Electric smoking system (21) according to claim 1, characterized by the fact that the cigarette (23) includes filtering material (62). Electric smoking system (21) according to claim 5, characterized in that it also comprises a plurality of circumferentially separated holes (16) in the tobacco tubular matrix (66), the holes being covered by the housing (71) . Electric smoking system (21) according to claim 1, characterized in that the tubular tobacco matrix (66) comprises a tubular base screen (68) and a layer of tobacco material (70) disposed on the along an interior of the tubular base web (68), the holes (16) extending through the base web (68) and the tobacco material layer (70). 8. Electric smoking system (21) according to claim 6, characterized by the fact that the holes in the die (16) are 1 mm in diameter and 6 in number, arranged in a row and the zone Petition 870180047568, of 06/04/2018, p. 46/99 3/8 perforations (12) comprises one or two rows of perforations orifices (17), each row having 12 perforations-orifices. Electric smoking system (21) according to claim 1, characterized in that the filling comprises only ammonium magnesium phosphate filling. Electric smoking system (21) according to claim 9, characterized in that the ammonium magnesium phosphate filling essentially consists of the magnesium ammonium phosphate monohydrate form. 11. Method of using the electric smoking system (21) as defined in claim 1, comprising supplying electric current from a battery (35a) to the heating blade (37) according to the energy cycle, the energy cycle being implemented by the controller in such a way that the heating blade (37) heats the heating zone (95) of the cigarette (23) characterized by the fact that the heating of the heating blade (37) is limited by the controller (41 ) to heat the tubular tobacco matrix (66) adjacent to the heating zone to a temperature of 200 ° C to 350 ° C by supplying 15 to 40 Joules of energy to the heating blade (37), preferably 20 to 35 Joules, in order to generate tobacco smoke while reducing the content of at least one gas component in tobacco smoke, the at least one gas component including carbon monoxide, 1,3butadiene, isoprene, acrolein, acrylonitrile, hydrogen cyanide, otoluidine, 2 -naftilamine, n oxide itrogen, benzene, NNN, phenol, catechol, benz (a) anthracene, and benzo (a) pyrene. Method according to claim 11, characterized in that the heating blade (37) heats the heating zone (95) of the cigarette in order to generate tobacco smoke while reducing the carbon monoxide content by at least 40% Petition 870180047568, of 06/04/2018, p. 47/99 4/8 compared to using the electric smoking system to smoke the same type of cigarette with only calcium carbonate as the filling of the wrapper (71). Method according to claim 11, characterized in that the heating blade (37) heats the heating zone (95) of the cigarette in order to generate tobacco smoke while reducing the 1,3-butadiene content by at least 40% compared to using the electric smoking system to smoke the same type of cigarette having only calcium carbonate as the wrapper (71). Method according to claim 11, characterized in that the heating blade (37) heats the heating zone (95) of the cigarette in order to generate tobacco smoke while reducing the isoprene content by at least 30% compared to using the electric smoking system to smoke the same type of cigarette having only calcium carbonate as the wrapper (71). 15. Method according to claim 11, characterized in that the heating blade (37) heats the heating zone (95) of the cigarette in order to generate tobacco smoke while reducing the acrolein content by at least 10% compared to using the electric smoking system to smoke the same type of cigarette having only calcium carbonate as the wrapper (71). 16. Method according to claim 11, characterized in that the heating blade (37) heats the heating zone (95) of the cigarette in order to generate tobacco smoke while reducing the formaldehyde content by at least 70% , acetaldehyde by at least 30%, and propionaldehyde by at least 40% compared to using the electric smoking system to smoke the same type of Petition 870180047568, of 06/04/2018, p. 48/99 5/8 cigarette having only calcium carbonate as the filling of the housing (71). 17. Method according to claim 11, characterized in that the heating blade (37) heats the heating zone (95) of the cigarette in order to generate tobacco smoke while reducing the acrylonitrile content by at least 40% compared to using the electric smoking system to smoke the same type of cigarette having only calcium carbonate as the wrapper (71). 18. Method according to claim 11, characterized in that the heating blade (37) heats the heating zone (95) of the cigarette in order to generate tobacco smoke while reducing the hydrogen cyanide content by at least 20% compared to using the electric smoking system to smoke the same type of cigarette with only calcium carbonate as the wrapper (71). 19. Method according to claim 11, characterized in that the heating blade (37) heats the heating zone (95) of the cigarette in order to generate tobacco smoke while reducing the o-toluidine content by at least 30% compared to using the electric smoking system to smoke the same type of cigarette with only calcium carbonate as the filling of the wrapper (71). 20. Method according to claim 11, characterized in that the heating blade (37) heats the heating zone (95) of the cigarette in order to generate tobacco smoke while reducing the 2-naphthylamine content by at least 15% compared to using the electric smoking system to smoke the same type of cigarette with only calcium carbonate as the wrapper (71). Petition 870180047568, of 06/04/2018, p. 49/99 6/8 21. Method according to claim 11, characterized in that the heating blade (37) heats the heating zone (95) of the cigarette in order to generate tobacco smoke while reducing the nitrogen oxide content by at least 30% compared to using the electric smoking system to smoke the same type of cigarette with only calcium carbonate as the filling of the wrapper (71). 22. Method according to claim 11, characterized in that the heating blade (37) heats the heating zone (95) of the cigarette in order to generate tobacco smoke while reducing the benzene content by at least 40% compared to using the electric smoking system to smoke the same type of cigarette having only calcium carbonate as the wrapper (71). 23. Method according to claim 11, characterized in that the heating blade (37) heats the heating zone (95) of the cigarette in order to generate tobacco smoke while reducing the toluene content by at least 40% compared to using the electric smoking system to smoke the same type of cigarette having only calcium carbonate as the wrapper (71). 24. Method according to claim 11, characterized in that the heating blade (37) heats the heating zone (95) of the cigarette in order to generate tobacco smoke while reducing the content of NNN by at least 25% compared to using the electric smoking system to smoke the same type of cigarette having only calcium carbonate as the wrapper (71). 25. Method according to claim 11, characterized by the fact that the heating blade (37) heats the heating zone (95) of the cigarette in order to generate tobacco smoke while petition 870180047568, of 06/04/2018, p. . 50/99 7/8 to reduces the phenol content by at least 30% compared to using the electric smoking system to smoke the same type of cigarette with only calcium carbonate as the filling of the wrapper (71). 26. Method according to claim 11, characterized in that the heating blade (37) heats the heating zone (95) of the cigarette in order to generate tobacco smoke while reducing the catechol content by at least 25% compared to using the electric smoking system to smoke the same type of cigarette having only calcium carbonate as the wrapper (71). 27. Method according to claim 11, characterized by the fact that the heating blade (37) heats the heating zone (95) of the cigarette in order to generate tobacco smoke while reducing the content of “bena (a) anthracene ”By at least 60% compared to using the electric smoking system to smoke the same type of cigarette with only calcium carbonate as the wrapper (71). 28. Method according to claim 11, characterized by the fact that the heating blade (37) heats the heating zone (95) of the cigarette in order to generate tobacco smoke while reducing the content of “benzo (a) pyrene ”By at least 50% compared to using the electric smoking system to smoke the same type of cigarette with only calcium carbonate as the filling of the wrapper (71). 29. Method according to claim 11, characterized in that the filling varies from 10% to 60% by weight based on the total weight of the wrapper (71), the wrapper is a single layer wrapper that includes at least one row circumferential perforations, the casing has a base weight between 15 g / m ² to 75 g / m ² and a porosity between 2 CORESTA units to 200 COPetition units 870180047568, from 06/04/2018, p. 51/99 8/8 RESTA, and / or the wrapper includes from 2% to 15% by weight of a burning additive comprising at least one alkali metal salt of an acid selected from the group consisting of sodium fumarate, sodium citrate, potassium citrate, sodium succinate potassium, potassium monohydrogen phosphate, and potassium dihydrogen phosphate. 30. Method according to claim 11, characterized in that the enclosure (71) has a base weight between 25 g / m ² to 35 g / m ² and a porosity between 25 units of CORESTA to 45 units of CORESTA, the amount of filler ranges from 20% to 40% by weight based on the total weight of the wrapper, and / or the filler has an average particle size of less than 5 µm. Petition 870180047568, of 06/04/2018, p. 52/99 1/10