Developer preparing apparatus and developer preparing method

Details Developer preparing apparatus and developer preparing method Developer preparing apparatus and developer preparing method

1994-11-09

1995-12-19

Jenkins, Robert W.

Agitating

Having specified feed means

Responsive to condition sensor

137 3, 366137, 366141, B01F 1504

Patent

active

054763207

ABSTRACT:
A developer preparing apparatus for obtaining a developer containing a developer component having a definite content by mixing an undiluted developer solution containing 5 to 40% by weight of tetramethylammonium hydroxide (TMAH) and pure water, and a developer preparing method for preparing the developer using the developer preparing apparatus. The developer preparing apparatus comprising a mixing bath equipped with a means for receiving and mixing an undiluted developer solution and pure water, an ultrasonic densitometer for measuring the developer component contained in the developer in the mixing bath, a flow rate controlling means for controlling the supplying flow rate of the undiluted developer solution and/or pure water into the mixing bath by the output signal from the ultrasonic densitometer, and a storage tank for receiving and storing the developer containing the developer component having the definite content in the mixing bath.

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