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US 3,956,790 AGranted
Method of apparatus for removing dust from the surface of a moving web
AssigneeFuji Photo Film Co., Ltd.
InventorsMamoru Ishiwata, Katzutaka Yoshida, Hiroshi Nozawa
Life of this patent
Estimating the term…
Abstract
Dust is removed from a running web by a counterflow liquid bath and downstream application of one or more high velocity air jets to a localized convex curvature of the web, said application of high velocity air jets being accompanied by application of vacuum pressure to remove the mist created by the air jets.
Claims5
Apparatus for removing dust from a moving web, said apparatus comprising:
- a. a fountain washer having a discharge slot defined by two lips, the upstream lip being spaced further from the moving web during use of the apparatus than the downstream lip, whereby the overflowing liquid flows in the direction opposite to the running direction of the web during use of the apparatus, and
- b. a liquid removing means downstream of said fountain washer, said liquid removing means comprising:
- i. means for giving the moving web a localized curvature;
- ii. means for blowing compressed air against the outer surface of the curved moving web at an angle to the surface the absolute value of which is between 0.degree. and 30.degree., thereby creating a mist of the washing liquid, and
- iii. means for exhausting the mist and the blown air from the vicinity of the moving web.
2 more elements
Dependencies are inferred from the claim text.