Classifying – separating – and assorting solids – Sorting special items – and certain methods and apparatus for... – Traveling items shifted to form line – or into end or edge...
Patent
1987-10-19
1989-12-12
Pedder, Dennis H.
Classifying, separating, and assorting solids
Sorting special items, and certain methods and apparatus for...
Traveling items shifted to form line, or into end or edge...
209584, 209900, 250557, 382 1, B07C 118, B07C 314
Patent
active
048865966
ABSTRACT:
The invention maintains the focus of a reader in a postal sorting and transporting system which is equipped to read an image of an address on either side of a mail article. The address reading apparatus uses two address readers disposed on opposite sides of a transfer path over which the mail articles travel. An address-carrying surface detector is disposed along the transfer path and upstream of the two address readers. Two floating roller pairs are provided at the inlet and the outlet of the address readers, to hold the mail article therebetween. A pressure roller driving mechanism responds to an output signal delivered from the address-carrying surface detector for selectively fixing one roller of either roller pair at a predetermined distance from the mail article's address carrying surface so that the distance between the address carrying surface and the appropriate address reader is kept constant. This constant distance fixing compensates for variations in the thickness of the mail article in order to maintain an accurate focus.
REFERENCES:
patent: 2928953 (1960-03-01), Bassler
patent: 3517992 (1970-06-01), Holle
patent: 4117975 (1978-10-01), Gunn
patent: 4287409 (1981-09-01), Auchinleck
patent: 4516264 (1985-05-01), Corvari et al.
patent: 4738368 (1988-04-01), Shaw
Noguchi Masahiko
Sasage Tsutomu
NEC Corporation
Pedder Dennis H.
Wacyra Edward M.
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