Patent ID: 8459272

Claim:
A cigarette filter subassembly, comprising: a first absorbent member defining a first end surface, said first end surface of said first absorbent member forming a first end of said cigarette filter subassembly; a second absorbent member defining a second end surface, said second end surface of said second absorbent member forming a second end of said cigarette filter subassembly; at least one capsule provided between said first absorbent member and said second absorbent member, said at least one capsule containing a fluid material for modifying characteristics of tobacco smoke during smoking of the cigarette, said at least one capsule releasing at least a portion of the fluid material when the at least one capsule is subjected to external force; said cigarette filter subassembly having an outer cover extending substantially from said first end of said cigarette filter subassembly to said second end of said cigarette filter subassembly and enclosing said at least one capsule, said outer cover being formed of a material which is substantially impermeable to said fluid material of said at least one capsule; and an annular layer of cellulose acetate provided about the outer cover of said cigarette filter subassembly, wherein said annular layer of cellulose acetate is steam set.