04939355 is referenced by 100 patents and cites 4 patents.

A point of sale bar code scanner, such as a grocery store check-out label scanner, that is attendant-free and completely automated in providing a listing or a total pricing of a customer's selected items. At each automated check-out, the customer initiates the process, places items on a conveyor, which carries each item separately through a scanner. The scanner reads all sides of each package, including the bottom of the package, since the bar code label could be located on any surface. Serial conveyors are used, and gates preferably control the advancement of items onto a conveyor which will carry the item through the scanning area, such that only one item can be scanned at a time. The conveyor in the scanning area includes a series of belt strips through which an upwardly scanned beam can read the package bottom. Various methods and systems are disclosed for handling "no reads". The customer signifies termination of the process at the appropriate time. In the process the customer receives some sort of identification tag.

Title
Automatic package label scanner
Application Number
7/147815
Publication Number
4939355
Application Date
January 22, 1988
Publication Date
July 3, 1990
Inventor
H Nicks Roberts
Eugene
OR, US
Joseph F Rando
Los Altos Hills
CA, US
Agent
Thomas M Freiburger
Paul Davis
Donald C Feix
Assignee
Spectra Physics
CA, US
IPC
G06K 7/10
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