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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0686386 (1976-05-14) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 19 인용 특허 : 0 |
An air filter is formed into an accordion-shaped body having reverse folds forming pockets. A plurality of string-like pleat spacing members are provided and with each member being threaded through a plurality of openings in the pocket walls. The openings are smaller in diameter than that of the spa
An air filter comprising, in combination: a. a collapsible expandible accordian-shaped filter body having reverse folds forming pockets having common walls therebetween, b. said walls having at least one row of aligned holes disposed therein, c. and an elongated string-like member threaded through s
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