<p>A tobacco smoke filter or filter element comprising a stiff outer wrapper engaged around a downstream thermoformed core of tobacco smoke filtering material and a further core longitudinally aligned therewith; the downstream thermoformed core having a profiled outer surface which defines with the stiff outer wrapper at least one longitudinally extending channel which extends the length of the downstream core.</p>
申请公布号
WO2014020055(A1)
申请公布日期
2014.02.06
申请号
WO2013EP66064
申请日期
2013.07.31
申请人
ESSENTRA FILTER PRODUCTS DEVELOPMENT CO. PTE. LTD;FILTRONA FILTER PRODUCTS UK LIMITED