Identification of workpiece information

Details Identification of workpiece information Identification of workpiece information

1988-09-12

1990-08-07

MacDonald, Allen

Boots, shoes, and leggings

235375, G06F 700, G06K 700

Patent

active

049473352

ABSTRACT:
Disclosed is a method and apparatus for identifying the lot codes of workpieces, such as printed circuit board panels, as they progress down a manufacturing line. At an initial stage of processing, a hole pattern is drilled along one edge of the pieces. The hole pattern includes the lot code number of that piece in binary form. The hole pattern can be addressed by appropriate optical means such as an LED-phototransistor combination or by a video camera as the pieces pass by in order to determine the lot code or other information at any desired point in the processing.

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patent: 4700309 (1987-10-01), Naito et al.
patent: 4760247 (1988-07-01), Keane et al.

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