초록 ▼

A drop jet apparatus has a nozzle head which defines a pressure chamber, a nozzle, and passages. Part of the pressure chamber is defined by a thin diaphragm which is made thick at the central and at a surrounding portion spaced from the central portion. A piezoelectric plate is adhered to the thick

A drop jet apparatus has a nozzle head which defines a pressure chamber, a nozzle, and passages. Part of the pressure chamber is defined by a thin diaphragm which is made thick at the central and at a surrounding portion spaced from the central portion. A piezoelectric plate is adhered to the thick portions so as to bridge the thin portion between the projections.

대표청구항 ▼

A drop jet apparatus comprising housing means defining a pressure chamber; nozzle means communicating with said pressure chamber for jetting drops therethrough; diaphragm means, included in said housing means for defining a part of said pressure chamber, said diaphragm means having a thick central p

A drop jet apparatus comprising housing means defining a pressure chamber; nozzle means communicating with said pressure chamber for jetting drops therethrough; diaphragm means, included in said housing means for defining a part of said pressure chamber, said diaphragm means having a thick central portion at the center and a thin portion surrounding said thick central portion; electro-mechanical transducer means, disposed on said housing so as to bridge said thin portion and secured to said diaphragm means at said thick central portion for deforming said diaphragm according to electric signals; liquid reservoir means communicating with said pressure chamber for storing therein a liquid; and electric signal generator means electrically connected to said electro-mechanical transducer means.