Bar code scanner having a light source/photodetector movable in

Details Bar code scanner having a light source/photodetector movable in Bar code scanner having a light source/photodetector movable in

1991-03-20

1992-12-29

Shepperd, John W.

Registers

Coded record sensors

Particular sensor structure

235454, 74 27, 358199, 358497, G06K 710, F16H 2116, H04N 302

Patent

active

051754207

ABSTRACT:
Apparatus for reading bar codes on integrated circuit wafers during both the integrated circuit manufacturing process and the wafer manufacturing process which include placing a wafer in fixed position over a bar code scanner. The scanner includes a motor whose gearing moves a reader head in a linear raster pattern at a constant focal point over the bar code. The bar code scanner may be retrofitted to existing reading equipment used in the manufacture of the wafers or in the manufacture of the integrated circuits. In another aspect of the invention, the bar code scanner may be provided as part of a desk-top unit. The present invention is especially useful in reading bar codes in any situation where the bar codes are difficult to read because of varying print/contrast and reflectivity.

REFERENCES:
patent: 2711101 (1955-06-01), Watter
patent: 3645626 (1972-02-01), Druschel
patent: 3683706 (1972-08-01), O'Neill
patent: 4349741 (1982-09-01), Bobart et al.
patent: 4496831 (1985-01-01), Swartz et al.
patent: 4799164 (1989-01-01), Hellekson et al.
patent: 4922087 (1990-05-01), Nakajima et al.
patent: 4926033 (1990-05-01), Kobayashi
patent: 4939356 (1990-07-01), Rando et al.
patent: 4988851 (1991-01-01), Kohno et al.
patent: 5015831 (1991-05-01), Eastman et al.
patent: 5015832 (1991-05-01), Filipski et al.

Affiliated with

Also associated with

Rating

Bar code scanner having a light source/photodetector movable in does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bar code scanner having a light source/photodetector movable in , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bar code scanner having a light source/photodetector movable in will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1889526