Recorders – Markers and/or driving means therefor – With ink supply to marker
Patent
1992-11-30
1994-06-14
Fuller, Benjamin R.
Recorders
Markers and/or driving means therefor
With ink supply to marker
36446402, 250568, G01D 1516, G06K 710, G06F 1520
Patent
active
053214366
ABSTRACT:
A franking machine in which the franking impression is printed by means of an ink jet print head. In order to determine whether all the ink jet nozzles are functional all of the nozzles are operated in selected ones of a series of print cycles to print a bar code. Reading means is provided to read a part of the bar code printed by a group of the nozzles and the information read is compared with information intended to be represented by the bar code. For successive printings of the bar code, the reading means is shifted transversely so that over a series of bar codes all the nozzles are checked.
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IBM Tech. Bulletin, vol. 16, No. 101 Mar. 1974, "Capacitive Ink Level Detector", D. W. Phillips.
Frahm Eric
Fuller Benjamin R.
Neopost Limited
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