Method and device for graphically illustrating the filling of a cigarette
AssigneeSociete Nationale D'Exploitation Industrielle des Tabacs et Allumettes (S.E.I.T.A.)
InventorsJean-Remi Poulet, George Cholet
Life of this patent
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Abstract
The method according to the invention comprises elaborating a sinusoidal mathematical model representing the density y versus the axial position x, conducting experimental measurements of density and of moisture at a plurality of points along the longitudinal axis of the cigarette, calculating a regression determination coefficient from the measured values, calculating the position of the strengthened tip from the phase φ and the parameters of the model and from experimentally determined constants, calculating the shift of the strengthened tip relatively to the cut and calculating the strengthening index from the values of said constants.
Claims10
A method for graphically illustrating the filling profile of a cigarette, with control of the strengthening amplitude and of the position of the strengthened tip(s) relatively to the cut of the stem performed during the manufacturing of the cigarette, said method comprising the following operating phases:
- elaborating a sinusoidal mathematical model representing density y versus axial position x, this model taking parameters into account such as the length of the tobacco section L, the total length of the cigarette LT, the length of the LF filter and by using at least three constants A0, A1 and φ to be determined experimentally,
- achieving experimental measurements so as to determine the average density D and the average moisture H at a plurality of points along the longitudinal axis of the cigarette,
- calculating a regression determination coefficient R2 from the measured values,
- calculating the position P of the strengthened tip from the phase φ and the aforesaid parameters,
- calculating the shift of the strengthened tip relatively to the cut from the position P calculated earlier,
- calculating the strengthening index from the value of said constants.
A device for graphically illustrating the filling profile of a cigarette, with control of the strengthening amplitude and of the position of the strengthened tip(s) relatively to the cut of the stem performed during the manufacturing of the cigarette, said device comprising the following operating phases:
- means for elaborating a sinusoidal mathematical model representing density y versus axial position x, this model taking parameters into account such as the length of the tobacco section L, the total length of the cigarette LT, the length of the LF filter and by using at least three constants A0, A1 and φ to be determined experimentally,
- measuring means for achieving experimental measurements and for determining the average density D and the average moisture H at a plurality of points along the longitudinal axis of the cigarette,
- means for calculating a regression determination coefficient R2 from the measured values,
- means for calculating the position P of the strengthened tip from the phase φ and the aforesaid parameters,
- means for calculating the shift of the strengthened tip relatively to the cut from the position P calculated earlier,
- means for calculating the strengthening index from the value of said constants,
- said device further comprising a hopper associated with a distributor which delivers cigarettes one by one, wherin said measuring means comprises:
- an hyper frequency module comprising an electronic rack (wobbulator) and a cavity crossed by a tube for guiding the cigarettes, which measures the point density and the moisture of the cigarettes passing through the cavity,
- constant rate driving means being provided for the cigarettes during their passing in the cavity.
Dependencies are inferred from the claim text.