Brown & Williamson Tobacco Corporation

Andrew McMurtrie

Frank Kelley St Charles

Robert A Sanford

Tilford F Riehl

Jiunn-Yann Tang

Charles G Lamb

John H Lauterbach

Martin L Reynolds

Dorothy M Frank

Li-Chung Chao

Donald A Silberstein

Baran B Chakraborty

A dye for coloring cigarette paper a brown color which includes caramel as the brown coloring agent, a plasticizer to prevent the paper from becoming brittle, and water. The dye can further include carmine as a red coloring agent to change the shade and hue of the brown color of the caramel. The dye can further include a burn additive to promote the burning of the dyed paper if needed.

Dye for coloring cigarette paper

A cigarette including a tube of tobacco having a circumferential wall fabricated of a tobacco material with ridges and grooves from in the circumferential wall extending longitudinally of the tobacco tube, a wrapper of combustible material circumscribing the outside peripheral surface, and a filter rod attached at one end of the tobacco tube. Also, a method of making a cigarette includes forming a sheet of tobacco material, forming corrugations in the sheet of tobacco material and forming the corrugated sheet into a cylindrical tube.

Cigarette and method of making same

A filter for a cigarette includes a porous filter rod circumscribed by a substantially non-porous or air impermeable wrapper with selected air permeable areas, and ventilating air grooves embedded in the wrapped filter rod which extend from on end of the filter rod a preselected distance generally longitudinally of the filter rod. Tipping material circumscribes the wrapped filter rod and is formed with perforations therethrough providing a path for ventilating air flow into the grooves and into the body of the filter rod at the selected air permeable areas outside of the grooves. The walls of each of the grooves are formed with preselected perforations therethrough to provide for the flow of air from the grooves into the body of the filter rod. Under certain smoking conditions most, if not all, of the ventilating air in the grooves will flow from the grooves into the smoker's mouth through the open end of the grooves at the mouth end of the filter rod. Under certain other smoking conditions, at least a part of the ventilating air flowing in the grooves will pass through the apertures of the groove walls and into the body of the filter rod and air will pass through the air impermeable wrapper into the body of the filter rod outside the grooves. The air flowing into the filter body co-mingles with and dilutes the smoke flowing through the filter.

Cigarette filter

A filter for a cigarette includes a porous filter rod circumscribed by a non-porous wrapper provided with at least one groove embedded into the periphery of the filter rod extending from the mouth end thereof a preselected distance longitudinally therealong less than the entire length of the filter rod. Tipping material circumscribes the non-porous wrapper and is provided with flow-through openings therein in flow communication with the groove. The tipping material extends beyond the mouth end thereof defining a recess, and the filter rod includes a cylindrical collar coaxially located in the recess concentrically with the portion of the tipping material extending beyond the filter rod mouth end. The thickness of the wall of the collar is less than the depth of the groove which collar functions as a baffle to accelerate the velocity of the air leaving the groove.

A filter for a cigarette includes a porous filter rod circumscribed by a non-porous or air impermeable wrapper, and ventilating air grooves embedded in the wrapped filter rod which extend from one end of the filter rod a preselected distance generally longitudinally thereof. The ends of the grooves are recessed a predetermined distance or depth inwardly of the end of the filter rod and communicate with radially extending open channels formed in the one end of the filter rod. An air permeable tipping material circumscribes the wrapped filter rod which provides a path for ventilating air flow into the grooves. Due to the air impermeable wrapper, the air flowing in the grooves is segregated from the smoke flowing through the filter rod so that ventilating air is the only substance flowing in the grooves.

A filter for a cigarette includes a porous filter rod circumscribed by a non-porous or air impermeable wrapper, and ventilating air grooves embedded in the wrapped filter rod which extend from one end of the filter rod a preselected distance generally longitudinally of the filter rod. An air permeable tipping material circumscribes the wrapped filter rod which provides a path therethrough for ventilating air flow only into the grooves. The walls of each of the grooves defined by the wrapper, in one form of the invention, is permeable to air over virtually its entire length, and in another form of the invention is permeable to air flow only adjacent the mouth end of the filter. Under certain smoking conditions most, if not all of the ventilating air will flow from the grooves into the smoker's mouth through the open end of the grooves at the mouth end of the filter rod. Under certain other smoking conditions, at least a part of the ventilating air will pass through the air permeable walls, or portions thereof, of the grooves and into the filter rod wherein it co-mingles with and dilutes the smoke flowing therethrough.

Growing community of inventors

Louisville, KY, United States of America

Andrew McMurtrie