Filter for a smoking article
AssigneeBritish American Tobacco (Investments) Limited
InventorsJohn Richardson, Joseph Peter Sutton
Life of this patent
Estimating the term…
Abstract
A filter (3) for a smoking article (1) comprises one or more segments (4a, 4b, 4c) of filtration media and a substantially transparent wrapper (5). The one or more filter segments (4a, 4b, 4c) and the wrapper (5) define a recess or cavity in the filter (3). An anchoring adhesive (7) is provided to secure the one or more filter segments (4a, 4b, 4c) to the wrapper (5). The anchoring adhesive (7) is disposed exclusively between the wrapper (5) and portions of the one or more filter segments (4a, 4b, 4c) other than those corresponding to the recess or cavity.
Claims15
A smoking article comprising a rod of smokable material, a filter attached to one end of the rod of smokable material and a window formed in the filter, the filter comprising one or more segments of filtration media and a substantially transparent wrapper at least part of which forms at least part of the window, wherein an anchoring adhesive is provided to secure the one or more filter segments to the wrapper, said anchoring adhesive being disposed exclusively between the one or more filter segments and portions of the wrapper other than those forming at least part of the window, wherein the smoking article further comprises a tipping wrapper attaching the filter to the rod of smokable material, the tipping wrapper extending over only part of the length of the filter such that a portion of the filter remains exposed to define the window, wherein the tipping wrapper comprises a first tipping wrapper and the smoking article further comprises a second tipping wrapper circumscribed around the mouth-end of the filter and axially spaced from the first tipping wrapper so that said window is defined between the first and second tipping wrappers.
A method of manufacturing a smoking article comprising locating one or more segments of filtration media on a substantially transparent wrapper;
- providing an anchoring adhesive to secure the one or more filter segments to the wrapper;
- circumscribing the wrapper around the one or more filter segments to form a filter;
- placing a rod of smokable material adjacent one end of the filter in axial alignment therewith and circumscribing a tipping wrapper over the rod and filter to attach them together, wherein the tipping wrapper only extends over part of the length of the filter such that a portion of the filter remains exposed to define a window, wherein said tipping wrapper is a first tipping wrapper and the method further comprises circumscribing a second tipping wrapper around the mouth-end of the filter and axially spaced from the first tipping wrapper so that said window is defined between the first and second tipping wrappers;
- and wherein providing the anchoring adhesive comprises providing anchoring adhesive exclusively between one or more filter segments and portions of the wrapper other than those corresponding to the window.
Dependencies are inferred from the claim text.