Tobacco sheet and method and apparatus for the production of a tobacco sheet
AssigneeB.A.T. Cigarettenfabriken GmbH
InventorsUwe Ehling, Jurgen Nusslein, Gerald Schmekel, Wilfried Stiller, Werner Hass, Volker Heemann, Casper H. Koene, Arno Weiss
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Abstract
With the present invention a tobacco sheet or foil is proposed which has an elevated filling force and consists of tobacco particles, water, binders and moisturizers, and relatively gas-impermeable, in particular surface-sealed cover layers being connected together by a spongy structure which is formed by gas-filled bubbles, and in which cavities are formed having a shaggy, furrowed and/or torn surface.
Claims46
A tobacco sheet of elevated filling power comprising tobacco particles, water, binder and moisturizer, wherein
- a) the outer surfaces of the sheet are formed by two relatively gas-impermeable, surface-sealed cover layers;
- b) between the cover layers there is a layer of spongy structure;
- and
- c) the layer includes a ply of lenticular gas-filled cavities with at least one of shaggy, furrowed and torn surface.
An apparatus for producing a tobacco-containing sheet, comprising
- a) an extruder having a nozzle, wherein
- b) the nozzle is followed by an expansion chamber through which tobacco sheet formed by the extruder is led;
- c) the expansion chamber is connected to a heat source in such a manner that the tobacco sheet passing through the expansion chamber is intensely heated from both sides so as to form relatively gas-impermeable cover layers, and a spongy intermediate layer having bubbles and lenticular cavities.
Dependencies are inferred from the claim text.