cigarette filter

Abstract

A cigarette filter or filter element comprising: a longitudinally extending core of cigarette filter material including an additive spaced longitudinally from a first end of the core; a first wrapper surrounding the core; a second wrapper of a wrapper; the first wrapper at least with the second wrapper (for example between the first wrapper and the second wrapper) defines a rim extending longitudinally of the filter from at least one end of the filter At least one channel (eg, 5 to 23 channels).

Description

technical field [0001] The present invention relates to filters and filter elements for tobacco products such as cigarettes. Background technique [0002] Cigarette filters containing particulate additives, especially activated carbon, are well known in the tobacco industry. Most such filters comprise longitudinally adjoining sections wherein the mouth end section does not contain any particulate additions and thus presents an acceptable end appearance, while one or more of the upstream sections include or contain particulate additions. It is well known that the production of such multi-segment filters is much more expensive than a "single-segment" filter because it requires separate processes to manufacture the individual segments and then correctly arrange and splice the different segments to form a multi-segment filter strip. Forming one (unique) piece of filter material rather than from two or more pieces of filter material] is more complex and more costly; a single pie...

AI Technical Summary

Problems solved by technology

However, the disadvantage of these filters is their higher degree of carbon carryover ('CCO') - that is, during the manufacturing process, discrete small particles of carbon may inadvertently transfer to the grooved area of ​​the inner package, where they May stain filter appearance

Images