Apparatus for controlling the flow of water to a diazo printer

Details Apparatus for controlling the flow of water to a diazo printer Apparatus for controlling the flow of water to a diazo printer

1982-05-06

1984-12-18

Mathews, A. A.

Photocopying

Contact printing

Light boxes

354300, 354319, 355 27, G03B 700

Patent

active

044887973

ABSTRACT:
The supply of water to a diazo printer is varied in relation to the speed of operation of the printer by deriving a train of pulses recurrent at a repetition rate proportional to printer speed, applying the pulses to an adjustable digital divider which divides down the repetition rate by an adjustable divisor D, and applying the divided-down pulse train to a water pump to control the rate of water supply. Switching means are provided in the divider to enable adjustment of the valve of the divisor D. This permits adjustment of the absolute rate of water delivery for any given motor speed, after which the rate will automatically change in proportion to printer speed.

REFERENCES:
patent: 3763758 (1973-10-01), Manack et al.
patent: 4057818 (1977-11-01), Gaskell et al.
patent: 4200496 (1980-04-01), Stein

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