Patent ID: 11903412
Assignee: ALTRIA CLIENT SERVICES LLC
Field: Other consumer goods (Other fields)
Classification: CPC A | IPC A

Claim 15:
16. A method of making a smoking article filter comprising:
wrapping a filter segment in plug wrap, wherein at least one pressure sensitive capsule containing a first flavorant and at least two heat sensitive capsules containing a second flavorant are incorporated in the filter segment, the filter segment including the at least one pressure sensitive capsule embedded in filter tow with the plug wrap surrounding the filter tow, the at least two heat sensitive capsule configured to release the second flavorant by heating an outer shell of the heat sensitive capsules, the at least two heat sensitive capsules having at least two different outer shell thicknesses,
wherein the at least one pressure sensitive capsule comprises an outer shell formed of a cross-linked agar matrix optionally including at least one filler and an inner core which comprises a composition including the first flavorant,
wherein the cross-linked agar matrix is reinforced with a continuous phase of carboxymethyl cellulose dispersed throughout the agar matrix so as to fill empty spaces in the agar matrix and inhibit the first flavorant from passing through the empty spaces, and
wherein the outer shell includes sodium chloride.