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Multiple coating apparatus

  • US 2,761,417 A
  • Filed: 02/23/1955
  • Issued: 09/04/1956
  • Est. Priority Date: 02/23/1955
  • Status: Expired due to Term
First Claim
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1. IN AN APPARATUS FOR SIMULTANEOUSLY APPLYING A PLURALITY OF FLUID COATING COMPOSITIONS TO THE SURFACE OF A WEB IN SUPERPOSED AND DISTINCT LAYER RELATIONSHIP, THE COMBINATION WITH A WEB GUIDING SURFACE OVER WHICH A WEB TO BE COATED IS ADAPTED TO BE CONTINUOUSLY MOVED WHILE BEING HELD IN A SMOOTH CONDITION, OF A MULTILAYER HOPPER COMPRISING A PLURALITY OF CAVITIES, ONE FOR EACH COATING COMPOSITION, A PAIR OF SEPARATED LIPS DEFINING AN ELONGATED DISCHARGE SLOT DIRECTED TOWARD BUT SPACED FROM SAID WEB GUIDING SURFACE BY AN AMOUNT SLIGHTLY GREATER THAN THE THICKNESS OF THE WEB TO BE COATED;

  • MEANS FOR CONTINUOUSLY EXTRUDING A SEPARATED LAYER OF COATING COMPOSITION FROM CERTAIN OF SAID CAVITIES AND THROUGH SAID DISCHARGE SLOT DIRECTLY TOWARD SAID WEB GUIDING SURFACE AND INCLUDING A SEPARATE ELONGATED DUCT CONNECTING EACH OF SAID CAVITIES WITH SAID DISCHARGE SLOT WHEREBY SAID LAYERS ARE COMBINED IN STRATA RELATIONSHIP UPON DISCHARGE FROM SAID DISCHARGE SLOT AND ARE SIMULTANEOUSLY APPLIED TO THE WEB IN SUCH COMBINED RELATIONSHIP, AND MEANS FOR CONTINUOUSLY FORMING A LAYER OF THE OTHER COATING COMPOSITON WITH THE AID OF GRAVITY FLOW AND COMBINING THEM IN STRATA RELATIONSHIP WITH THE COMBINED EXTRUDED LAYERS AS THEY ISSUE FROM SAID DISCHARGE SLOT, AND INCLUDING A DOWNWARDLY INCLINED SLIDE SURFACE INTERSECTING SAID DISCHARGE SLOT AT AN ACUTE ANGLE, AND MEANS FOR CONTINUOUSLY FEEDING A LAYER OF COATING SOLUTION FROM EACH OF SAID OTHER CAVITIES ONTO SAID SLIDE SURFACE AT SEPARATED POINTS ABOVE SAID DISCHARGE SLOT.

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