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Method of coating glass for subsequent soldering

  • US 3,293,065 A
  • Filed: 03/29/1965
  • Issued: 12/20/1966
  • Est. Priority Date: 03/29/1965
  • Status: Expired due to Term
First Claim
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1. A METHOD OF COATING GLASS SHEETS FOR SUBSEQUENT SOLDERING OPERATIONS, COMPRISING MOVING A GLASS SHEET TO BE COATED ALONG A DEFINITE PATH, HEATING THE SHEET TO A PRESELECTED TEMPERATURE RANGING BETWEEN ABOUT 150* AND 300*F., SPRAYING A MOLTEN METAL ALLOY ON THE HEATED SHEET AS IT MOVES ALONG SAID ING THEREON, DIRECTING A REDUCING FLAME AGAINST SAID METALLIC COATING TO REMOVE OXIDES THEREFROM, APPLYING A FIRST LAYER OF SOLDER DIRECTLY ON THE METALLIC COATING UPON CONTINUED MOVEMENT OF THE SHEET ALONG SAID PATH AND WHILE SAID SHEET IS AT SAID ELEVATED TEMPERATURE BY SPRAYING MOLTEN SOLDER AT A TEMPERATURE BETWEEN ABOUT 1000* AND 1500*F. TO PRODUCE A FINE, DENSE, RELATIVELY THIN LAYER OF SOLDER ON SAID METALLIC COATING, AND THEN APPLYING A SECOND LAYER OF SOLDER DIRECTLY ON THE FIRST LAYER OF SOLDER AS THE SHEET MOVES ALONG SAID PATH BY SPRAYING MOLTEN SOLDER AT A TEMPERATURE BETWEEN ABOUT 350* AND 500*F. TO A PRODUCE A REALTIVELY THICKER LAYER ON SAID FIRST LAYER OF SOLDER.

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