High-speed, gravity-fed document feeder for bar-code scanner

Details High-speed, gravity-fed document feeder for bar-code scanner High-speed, gravity-fed document feeder for bar-code scanner

1992-08-28

1994-08-09

Hajec, Donald

Registers

Coded record sensors

Feed mechanisms

271 3, G06K 1300, B65H 522, B65H 8300, B65H 8500

Patent

active

053368762

ABSTRACT:
Sheets carrying bar codes are first stacked with their bar codes directed downward, then are pulled one at a time from the bottom of the stack, and then the pulled sheets are gripped and impelled into an upper upstream end of a guide whose downstream end opens into an outfeed hopper. The sheets slide in free fall downward in the guide in an upstream-to-downstream travel direction along a travel path without being gripped with the sheets passing over a basically planar upstream guide plate having, relative to the travel direction, an upstream edge and a downstream edge below the upstream edge and over a basically planar downstream glide plate having an upstream edge joined to the downstream edge of the upstream plate and a downstream edge below the upstream edge of the downstream plate. The downstream plate lies in a plane forming with the upstream plate an angle of slightly less than 180.degree. while forming with the horizontal an angle of between 17.degree. and 30.degree. so as to deflect the sheets somewhat upward with the downstream plate. The sheets are scanned as they slide downward over the guide plates to read the bar codes thereon, and they are intercepted in the outfeed hopper with an upright end wall having an upper edge lying above the plane of the downstream feed plate so that the sheets come to rest in the output hopper.

REFERENCES:
patent: 4474365 (1984-10-01), DiBlasio
patent: 4962623 (1990-10-01), Francisco

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