Reconstituted tobacco sheets and methods for producing and using the same

• US 5,724,998 A
• Filed: 08/20/1996
• Issued: 03/10/1998
• Est. Priority Date: 04/09/1992
• Status: Expired due to Term

• Current Assignee: Philip Morris USA Incorporated (Altria Group, Inc.)
• Original Assignee: Philip Morris USA Incorporated (Altria Group, Inc.)
• Inventors: Keritsis, Gus, Gellatly, Grant, Wrenn, Susan E.
• Primary Examiner(s): Millin, Vincent
• Assistant Examiner(s): O'Hara, Kelly
• Application Number:
  US08/697,123
• Time in Patent Office: 567 Days
• Field of Search: 131/370, 131/372, 131/374
• US Class Current: 131/372
• CPC Class Codes: A24B 15/14 made of tobacco and a binding agent not derived from tobacco
• CPC Class Codes: A24B 3/14 Forming reconstituted tobacco products, e.g. wrapper materials, sheets, imitation leaves, rods, cakes; Forms of such products delustering A24C1/40

Abstract

Reconstituted tobacco sheets manufactured from tobacco dust and binder are described herein. More particularly, the tobacco dust has a mean particle size in the range of from about 60 mesh to about 400 mesh to afford reconstituted tobacco sheets having about 80% to about 90% tobacco content with improved quality and survivability. The reduced particle size of the tobacco dust allows an increase in the solids content of the slurry without an increase in slurry viscosity. The increased solids content reduces the drying load of the cast sheet thereby allowing an increased production rate. The reconstituted tobacco sheets may be prepared from a slurry comprising tobacco dust and binder that may be subjected to a means for removing air trapped within the slurry before casting the slurry into sheets. An apparatus for determining the amount of air trapped within the slurry prepared according to the process of the present invention is also described herein.

Claims

1. A process of manufacturing a reconstituted tobacco sheet suitable as a component of a cigarette cut filler, comprising the steps of:

(a) preparing a slurry comprising mixture of tobacco dust with a mean particle size in the range of from about 120 mesh to about 400 mesh, a binder consisting of a guar gum and an aqueous medium, said slurry having a total solids content from about 15% to about 30%, said step of preparing the slurry being free of any introduction of non-tobacco fiber;

(b) casting the slurry onto a supportive device;

(c) drying the cast slurry to form a reconstituted tobacco sheet; and

(d) removing the reconstituted tobacco sheet from the supportive device;

wherein said binder is about 8% or less of the total solids content of said slurry; and

wherein the amount of said binder is at a tobacco to binder weight ratio of from about 50;

1 to about 10;

1.

2. The process as claimed in claim 1, further comprising the step of:

(e) after said removing step, treating the supportive device with an acidic agent.