Edge coating

• US 3,081,213 A
• Filed: 04/13/1960
• Issued: 03/12/1963
• Est. Priority Date: 05/02/1958
• Status: Expired due to Term

• Current Assignee: Harry G. Chinn
• Original Assignee: Harry G. Chinn
• Inventors: Chinn, Harry G.
• Application Number:
  US04/024,867
• Time in Patent Office: 1,063 Days
• US Class Current: 156/192
• CPC Class Codes: B29C 48/08 flexible, e.g. films
• CPC Class Codes: B29C 48/155 Partial coating thereof
• CPC Class Codes: B29C 65/40 Applying molten plastics, e.g. hot melt using welding bar combined with hot gases B29C65/12; by moulding B29C65/70
• CPC Class Codes: B29C 65/4815 Hot melt adhesives, e.g. thermoplastic adhesives
• CPC Class Codes: B29C 65/5057 positioned between the surfaces to be joined B29C65/5035 takes precedence
• CPC Class Codes: B29C 65/5092 characterised by the tape handling mechanisms, e.g. using vacuum
• CPC Class Codes: B29C 66/1122 Single lap to lap joints, i.e. overlap joints B29C66/45, B29C66/472, B29C66/52272 take precedence
• CPC Class Codes: B29C 66/4322 by joining a single sheet to itself B29C66/4332 takes precedence
• CPC Class Codes: B29C 66/4329 the joint lines being transversal but non-orthogonal with respect to the axis of said tubular articles, i.e. being oblique
• CPC Class Codes: B29C 66/49 Internally supporting the, e.g. tubular, article during joining B29C66/63 takes precedence
• CPC Class Codes: B29C 66/72321 consisting of metals or their alloys
• CPC Class Codes: B29C 66/72328 Paper
• CPC Class Codes: B29C 66/7234 comprising a barrier layer
• CPC Class Codes: B29C 66/836 Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table B29C66/65 takes precedence
• CPC Class Codes: B29K 2711/123 Coated
• CPC Class Codes: B29L 2009/00 Layered products
• CPC Class Codes: B31B 50/743 Coating or impregnating edges or corners
• CPC Class Codes: B31C 3/00 Making tubes or pipes by feeding obliquely to the winding mandrel centre line
• CPC Class Codes: B31F 7/006 edges, e.g. sheet edges
• CPC Class Codes: Y10S 118/03 Container-related coater
• CPC Class Codes: Y10T 428/24777 : Edge feature
• CPC Class Codes: Y10T 428/31895 : Paper or wood

Claims

1. METHOD OF FORMING A STRONG, MOISTURE-PROOF BOND BETWEEN MARGINS OF SHEET MATERIAL COATED ON AT LEAST ONE SIDE WITH THERMOPLASTIC RESIN COMPOSITION, WHICH COMPRISES CONTINUOUSLY SEALING AN EDGE OF PAPER-THIN, SMOOTHSURFACED, DENSE HOMOGENEOUS SHEET MATERIAL BY CONTINUOUSLY WITHDRAWING SAID MATERIAL FROM A SUPPLY ROLL AND PASSING IT ALONG A RECTILINEAR PATH, CONTINUOUSLY EXTRUDING A HOLLOW MASS OF HOT THERMOPLASTIC RESIN MATERIAL HAING AN INTERIOR CONVERGING IN THE DIRECTION OF SAID PATH AND CHANNEL SHAPED IN CROSS SECTION WITH UPPER AND LOWER FLATS AND A CONNECTING WEB, CONTINUOUSLY DIRECTING SAID WEB ONTO SAID EDGE AND SAID FLATS ONTO SAID SHEET SURFACE MARGINS ADJACENT SAID EDGE AT A POINT IN SAID SURFACE PATH AND CONTINOUSLY ADHERING SAID COATING TO SAID EDGE AND SAID MARGINS AS THEY PASS BEYOND SAID POINT AND ON ALONG SAD RECTILINEAR PATH, AND PROGRESSIVELY APPLYING SAID EDGE-COATED MARGIN OVER ANOTHER SURFACE COATED MARGIN IN OVERLAPPING RELATION THEREWITH WHILE SUFFICIENT HEAT REMAINS IN SAID EDGE COATED MARGIN TO FORM STRONG BONDS TO FUSE THE EDGE COATING OF THE FIRST MARGIN TO THE SURFACE COATING OF THE SECOND.