会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 50. 发明专利
    • NL7111185A
    • 1972-02-16
    • NL7111185
    • 1971-08-13
    • A24D3/04A24D3/14A24D3/16A24C5/50A24B15/02
    • 1329956 Tobacco-smoke filters F J BURRUS & CIE 29 July 1971 [14 Aug 1970] 35761/71 Heading A2C A filter comprises at least three different filtering agents, at least one of which agents is primarily intended to remove smoke components with a particle diameter of more than 0.1 micron, and at least one other of which agents is a polar adsorption agent intended to remove chemically polar smoke components with a particle diameter of less than 0.1 micron. The specified polar adsorption agent is porous magnesium silicate of 0.1-2.0 mm particle size, and the agent for removing particles of more than 0.1 micron diameter may be a wad of cellulose acetate or crepe paper. As shown in Fig. 1, wads 1, 3 are formed of cellulose acetate fibre or crepe paper as is also a carrier material 6 on which mixed magnesium silicate particles 4 and activated carbon particles 5 are distributed. In Fig. 2, the particles 4, 5 on separate carriers are separated by a part 8. In Fig. 3, the particles 4, 5 are separated in the manner shown, and may be loose or bonded together at their contact points.