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1. 发明授权

US3690326A Cigarette filter 失效
标题翻译：香烟过滤器
公开(公告)号：US3690326A
公开(公告)日：1972-09-12
申请号：US3690326D
申请日：1970-10-01
申请人： AMERICAN FILTRONA CORP
发明人： DAVENPORT FRANCIS ROBERT
IPC分类号： A24D3/04 , A24D3/02
CPC分类号： A24D3/0283
摘要： Tobacco smoke filter having an axially extending tubular outer member and an axially extending air permeable inner member therewithin. The inner member is formed of filaments or fibers bonded to each other at their points of contact. At a first position the outer surface of the inner member is in engagement with the inner surface of the outer member to at least substantially preclude axial passage of smoke therebetween while at a second position, longitudinally spaced from the first, the filaments or fibers are formed into a portion of substantially smaller cross section to leave a hollow space through which smoke drawn through the filter may pass.
摘要翻译：烟草烟雾过滤器，其具有轴向延伸的管状外部构件和其中的轴向延伸的透气内部构件。内部构件由在其接触点处彼此结合的细丝或纤维形成。在第一位置，内部构件的外表面与外部构件的内表面接合，以至少基本上排除烟雾的轴向通过，而在与第一位置纵向间隔开的第二位置形成长丝或纤维进入基本较小横截面的一部分以留下中空空间，通过该中空空间通过过滤器抽出的烟可能通过。

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