Showing papers by "Ecolab published in 1977"
Patent•
25 Nov 1977TL;DR: In this paper, the apparent gain of each cell is varied by modulating the reference input of an analog-to-digital converter at the photocell scan rate, based upon the media being scanned.
Abstract: A scanned photocell array has the gain for each photocell channel automatically controlled by establishing a scale range based upon the media being scanned. The apparent gain of each cell is varied by modulating the reference input of an analog to digital converter at the photocell scan rate.
17 citations
Patent•
16 Dec 1977TL;DR: In this article, a hemicylindrical crystal is used in a variable frequency multi-orifice ink jet modulator to provide the capability of wide band operation and phase control is used to control printing operations.
Abstract: A hemicylindrical crystal is used in a variable frequency multi-orifice ink jet modulator. Unwanted resonant frequencies are damped providing the capability of wide band operation. A phase control is used with the modulator to control printing operations.
10 citations