Opposed seam electrically heated cigarette smoking system
An electrically heated cigarette smoking system includes a cigarette that is formed with a tobacco rod portion, a filter tube portion, a tobacco mat layer wrapped around the tobacco rod portion and the filter tube portion with opposite ends of the tobacco mat layer abutting along a seam parallel to the central axis of the cigarette and cigarette paper wrapped around the tobacco mat layer and bonded to itself along an overlapped seam that is offset from the seam of the tobacco mat layer. The method of manufacturing the cigarette includes wrapping the tobacco mat layer and the cigarette paper around the tobacco rod portion and the filter tube portion on a single, high-speed machine.
1. A method of manufacturing a cigarette for an electrically heated cigarette smoking system, comprising: applying an edge of a tobacco mat layer at a first circumferential position on the combination of an axially aligned and spaced tobacco plug and a filter tube, the edge of the tobacco mat layer spanning the tobacco plug and the filter tube; wrapping the tobacco mat layer around the circumference of the combination of said aligned and spaced tobacco plug and filter tube so that opposite ends of the tobacco mat layer abut along a longitudinal seam at the first circumferential position; applying an edge of a cigarette paper layer to the tobacco mat layer at a second circumferential position on the combination of the axially aligned and spaced tobacco plug and filter tube, with the edge of the cigarette paper layer being circumferentially offset from the edge of the tobacco mat layer; and wrapping the cigarette paper layer over the tobacco mat layer and around the circumference of the combination of the tobacco plug and the filter tube so that opposite ends of the cigarette paper layer overlap to form an overlapped longitudinal seam that is circumferentially offset from the abutting longitudinal seam of the tobacco mat layer,
wherein the overlapped longitudinal seam of the cigarette paper layer is antipodal to the abutting longitudinal seam of the tobacco mat layer.
2. The method according to claim 1 , wherein the tobacco mat layer and the cigarette paper layer are fed from bobbins of tobacco mat material and cigarette paper material and are applied to the combination of the tobacco plug and the filter tube that are supported in axial alignment and at a desired spacing in a flute of a drum that moves the combination in a direction perpendicular to the central axes of the tobacco plug and the filter tube.