Diazo printer with improved ammonia supply system

Details Diazo printer with improved ammonia supply system Diazo printer with improved ammonia supply system

1982-11-24

1984-10-16

Mathews, A. A.

354319, G03D 700

Patent

active

044771665

ABSTRACT:
The speed of a diazo printer is sensed and the rate of ammonia delivery to the developer chamber is automatically boosted at higher printer speeds. Preferably, a sensor positioned adjacent a rotary paper-drive member produces electrical pulses at a rate proportioned to the speed with which the copy paper passes through the developer chamber, and an electronic circuit board contains circuitry which senses when the rate of recurrence of these pulses rises into a predetermined range; when this occurs, the circuitry causes a solenoid valve to deliver an ammonia boost directly to a perforated tube located within the perforated tube through which the normal ammonia supply takes place at lower speeds.

REFERENCES:
patent: Re26525 (1969-02-01), Wilde et al.
patent: 3147687 (1964-09-01), Halden
patent: 3915708 (1975-10-01), Zausmer et al.
patent: 4122474 (1978-10-01), Songer et al.
patent: 4319826 (1982-03-01), Bussche et al.

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