Classifying – separating – and assorting solids – Adhesion – Coated surface or mass
Patent
1974-06-17
1976-07-27
Tollberg, Stanley H.
Classifying, separating, and assorting solids
Adhesion
Coated surface or mass
2091117T, 250569, 235 617R, B07C 310, G06K 900
Patent
active
039714730
ABSTRACT:
A selecting machine of the type commonly used for addressing mailed material from individual data-bearing cards, using tri-level logical comparator circuitry to compare the individual cards against an interchangeable master card. Both the individual and the master cards are perforated in files of holes longitudinal to the direction in which they are synchronously moved by the machine, the files of perforations being sensed by phototransistors connected in turn to the logic circuitry. For each potentially perforable site on the individual card, there are two corresponding locations on the master card, one of which when matched by a perforation on the individual card indicates nominal selection of the individual card, the other of which indicates positive rejection of the individual card, overriding any nominal selection, with rejection by default occurring if neither location on the master is perforated to correspond with a perforation at the equivalent site on the individual card. Synchronization pulses for gating the logic circuitry in the examination process are derived from a completely perforate file on the master card.
REFERENCES:
patent: 2898801 (1959-08-01), Rockafellow
patent: 3267258 (1966-08-01), Beue
Ernst, Jr. Franklin Henry
Nelson Martin N.
Rolla Joseph J.
Tollberg Stanley H.
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