发明名称 |
VACUUM CLEANING FILTER ARRANGEMENT |
摘要 |
The disclosure relates to the field of vacuum cleaning and in particular the collection of air-entrained debris, in a filter bag. The filter bag is for use in vacuum cleaning apparatus, and comprises fine planar filtration means in the form of a collection bag and coarse planar filtration means both being adapted to be placed in a suction-induced air stream with the coarse filtration means disposed upstream of the fine filtration means, wherein the fine filtration means serves to provide a fine filter for retaining dust particles and wherein the coarse filtration means comprises a relatively coarse filter material having a thickness of at least 4 mm which provides a matrix volume in which dust may be collected. The volume occupied by the coarse filtration means comprises at least 2%, preferably at least 5%, most preferably at least 10% of the maximum internal volume defined by the collection bag. |
申请公布号 |
EP2346383(A1) |
申请公布日期 |
2011.07.27 |
申请号 |
EP20090744177 |
申请日期 |
2009.10.20 |
申请人 |
NUMATIC INTERNATIONAL LIMITED |
发明人 |
DUNCAN, CHRISTOPHER, ROBERT |
分类号 |
A47L9/14;B01D39/16;B24B55/10 |
主分类号 |
A47L9/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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