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VISUAL IDENTIFIER FOR MISPLACED SHEETS IN MULTILAYER SCREENING MANUFACTURING

IP.com Disclosure Number: IPCOM000013501D
Original Publication Date: 1999-Aug-10
Included in the Prior Art Database: 2003-Jun-18
Document File: 4 page(s) / 268K

Publishing Venue

IBM

Abstract

Disclosed is a method to prevent misplacement of oriented screened sheets. Screened sheets with an orientation (non symmetric, one-sided pattern) must be placed into trays in the same direction to maintain the orientation in subsequent automated processing. The method described here will enable verification of the correct orientation. In addition in a multi-position screener, where different patterns are being screened at each station, this method will also verify that there is no mixing of different patterned sheets. Prior to screening, the edge of the stacked sheets is marked. The location and/or the color of the mark will be different for each screening pattern or part number, or screening station in the multi-position screener. When the sheets are restacked in the output tray after screening, the marked edge will be visible. Any marking inconsistent with the rest of the stack indicates a misoriented or misplaced sheet. Figure 1 shows a diagram of the visual identifier indicating a rotated sheet. Figure 2 shows a diagram of the visual identifier indicating a sheet misplaced into the wrong tray in a multi-position screener resulting in mixed patterns in the output tray. Figure 3. photograph shows actual marked screened greensheets, misplaced in the wrong trays. The Visual identifier can be easily seen. Any misplaced or misoriented sheets are identified and can then be removed to prevent wrong layers or misoriented layers from being incorporated into the final product. 1

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  VISUAL IDENTIFIER FOR MISPLACED SHEETS IN MULTILAYER SCREENING MANUFACTURING

    Disclosed is a method to prevent misplacement of oriented screened sheets. Screened sheets with an orientation (non symmetric, one-sided pattern) must be placed into trays in the same direction to maintain the orientation in subsequent automated processing. The method described here will enable verification of the correct orientation. In addition in a multi-position screener, where different patterns are being screened at each station, this method will also verify that there is no mixing of different patterned sheets.

    Prior to screening, the edge of the stacked sheets is marked. The location and/or the color of the mark will be different for each screening pattern or part number, or screening station in the multi-position screener. When the sheets are restacked in the output tray after screening, the marked edge will be visible. Any marking inconsistent with the rest of the stack indicates a misoriented or misplaced sheet. Figure 1 shows a diagram of the visual identifier indicating a rotated sheet. Figure 2 shows a diagram of the visual identifier indicating a sheet misplaced into the wrong tray in a multi-position screener resulting in mixed patterns in the output tray. Figure 3. photograph shows actual marked screened greensheets, misplaced in the wrong trays.

    The Visual identifier can be easily seen. Any misplaced or misoriented sheets are identified and can then be removed to preven...