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

• Current Assignee: Carleton R. Sanford, Richard M. Wilson, Theodore A. Russell
• Original Assignee: Carleton R. Sanford, Richard M. Wilson, Theodore A. Russell
• Inventors: Russell, Theodore A., Wilson, Richard M., Sanford, Carleton R.
• Application Number:
  US03/489,861
• Time in Patent Office: 559 Days
• US Class Current: 118/410
• CPC Class Codes: B05C 5/007 Slide-hopper coaters, i.e. apparatus in which the liquid or other fluent material flows freely on an inclined surface before contacting the work
• CPC Class Codes: B05C 5/0258 flow controlled, e.g. by a valve B05C5/0262, B05C5/0266 take precedence
• CPC Class Codes: B05C 9/06 for applying two different liquids or other fluent materials, or the same liquid or other fluent material twice, to the same side of the work
• CPC Class Codes: B05D 1/34 Applying different liquids or other fluent materials simultaneously
• CPC Class Codes: B29C 48/08 flexible, e.g. films
• CPC Class Codes: B29C 48/21 the layers being joined at their surfaces
• CPC Class Codes: B29C 48/2556 provided in or in the proximity of dies B29C48/302, B29C48/31, B29C48/325 take precedence
• CPC Class Codes: B29C 48/307 specially adapted for bringing together components, e.g. melts within the die
• CPC Class Codes: B29C 48/31 being adjustable , i.e. having adjustable exit sections
• CPC Class Codes: B29C 48/914 cooling drums
• CPC Class Codes: D06B 11/0069 by continuous contact with a member able to bring simultaneously a plurality of treating materials
• CPC Class Codes: D21H 23/46 Pouring or allowing the fluid to flow in a continuous stream on to the surface, the entire stream being carried away by the paper D21H23/66 takes precedence
• CPC Class Codes: D21H 5/0042 by pouring or allowing to flow in a continuous stream onto the surface, the entire stream being carried away by the paper
• CPC Class Codes: G03C 1/74 Applying photosensitive compositions to the base; Drying processes therefor G03C1/496 takes precedence

Claims

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.