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Apparatus and method for coating elongated strip articles

  • US 4,675,230 A
  • Filed: 11/12/1985
  • Issued: 06/23/1987
  • Est. Priority Date: 11/12/1985
  • Status: Expired due to Term
First Claim
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1. Apparatus for coating a major surface of an elongated strip article, comprising:

  • (a) a rigid coating head defining an elongated, open-sided slot and having an extended surface immediately adjacent the open side of the slot;

    (b) means for supplying liquid coating material under pressure to the slot;

    (c) means for supporting the head while permitting translational movement of the head relative to the supporting means in a direction perpendicular to the long dimension of the slot;

    (d) means for continuously longitudinally advancing a strip article successively past the slot open side and the extended surface of the head in a direction transverse to the long dimension of the slot while maintaining a major surface of the article in facing proximate relation to the slot so as to constitute a moving wall substantially closing said open side, such that during operation with the article advancing past the slot and liquid coating material supplied to the slot, the last-mentioned article major surface drags a layer of the coating material from the slot, said advancing means supporting the strip, opposite the slot, at a fixed distance from the head-supporting means; and

    (e) mean, acting between the head-supporting means and the head, for continuously exerting a load on the head to urge the head toward the last-mentioned article major surface such that, during operation as aforesaid, said head is pressed by said load-exerting means against the deposited layer of coating material to maintain said layer at a predetermined constant thickness while said layer alone holds the head entirely away from contact with the last-mentioned article major surface.

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