CONSTANT-AMOUNT DISCHARGER FOR LIQUID

• Main Authors: SHIMANO ICHIRO, KANBARA TOSHIO
• Format: Patent
• Language: English
• Published: 25.09.1991
• Subjects: APPARATUS FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; PERFORMING OPERATIONS; SPRAYING OR ATOMISING IN GENERAL; TRANSPORTING

PURPOSE:To maintain high discharge precision by setting the pressures of a pressure-control reducing valve and a suction negative pressure reducing valve based on a signal outputted from a control part in accordance with the amt. of liq. remaining in a syringe, liq. viscosity, etc. CONSTITUTION:An air source 2 is communicated with a syringe 1 by a discharge solenoid valve 4 based on the output of a discharge signal emitted from a timer control part 13 over a specified time. Consequently, an appropriate pressure set by the pressure setting signal from a main control part 11 is supplied to the syringe 1 by a pressure-control reducing valve 6 until the discharge signal is stopped. The setting of the appropriate pressure by the reducing valve 6 is automatically carried out by calling the data stored in a memory 12 based on the external signal inputted to the main control part 11 with the change in the amt. of liq. remaining in the syringe. Consequently, the efficiency in pressurizing the syringe is enhanced, and the leakage of liq. is prevented.