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Machine translation
1. (WO1980002117) MOVABLE,CONTINUOUSLY CHANGING,SELF-CHARGING ELECTROSTATIC FILTER
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/002117    International Application No.:    PCT/US1980/000357
Publication Date: 16.10.1980 International Filing Date: 09.04.1980
IPC:
B03C 3/30 (2006.01)
Applicants:
Inventors:
Priority Data:
28524 09.04.1979 US
Title (EN) MOVABLE,CONTINUOUSLY CHANGING,SELF-CHARGING ELECTROSTATIC FILTER
(FR) FILTRE ELECTROSTATIQUE MOBILE, AUTOCHARGEUR A CHANGEMENT PERMANENT
Abstract: front page image
(EN)A non-woven, relatively thin filter media (14) is formed of fine denier fibers wherein the media (14) exhibits the characteristic of developing an electrostatic charge in the presence of a substantially dry air stream moving at a speed of at least 200 feet per minute. The fibers are selected from the group containing polyester, nylon, and polypropylene. A length of filter media (14) so formed is moved between a supply roll (12) and a take-up roll (16) in the path of air contaminated with weld smoke and passing through a conduit (10). The filter media (14) may pass around one or more return rolls (18) between the supply (12) and take-up (16) rolls. The movement of the filter media (14) between the supply (12) and take-up (16) rolls is responsive to the build up of contaminants on the media. The moving air stream causes the unique filter media (14) to become electrostatically charged so that the fine particulate matter in the weld smoke is removed from the air stream more effectively than before.
(FR)Un materiau de filtration non tisse, relativement fin (14) est forme avec des fibres de denier fin ou le materiau (14) presente la caracteristique de developper une charge electrostatique en presence d"un courant d"air sensiblement sec se deplacant a une vitesse d"au moins 200 pieds par minute. Les fibres sont choisies parmi le groupe constitue de polyester, nylon et polypropylene. Une longueur de materiau de filtration. (14) ainsi formee se deplace entre une bobine d"alimentation (12) et une bobine receptrice (16) dans le passage d"air contamine par la fumee de soudage et passant au travers d"une conduite (10). Le materiau de filtration (14) peut passer autour d"une ou de plusieurs bobines de renvoi (18) entre les bobines d"alimentation (12) et de reception (16). Le mouvement du materiau (14) entre la bobine d"alimentation (12) et la bobine receptrice (16) est sensible au depot de contaminants sur le materiau. Le courant d"air mobile provoque le chargement electrostatique du materiau de filtration (14) de telle sorte que le materiau particulaire fin se trouvant dans la fumee de soudage soit soustrait du courant d"air de maniere plus efficace qu"auparavant.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)