1
Takuro Sekiya, Takashi Kimura, Tomoaki Nakano: Liquid jet head for gradation recording. Ricoh Company, Cooper & Dunham, December 15, 1992: US05172139 (82 worldwide citation)

A liquid jet recording head which is used for generating bubbles in a writing liquid of a liquid chamber and discharging droplets of the writing liquid to a recording sheet in an ink-jet printer. The liquid jet recording head includes an orifice from which the writing liquid is discharged, a liquid ...


2
Takuro Sekiya, Kyuhachiro Iwasaki: Ink jet recording method. Ricoh Company, Cooper & Dunham, March 11, 1997: US05610637 (77 worldwide citation)

An ink jet recording method includes the steps of inputting a set of driving pulses to a heater element so that the heater element is repeatedly activated by the driving pulses, repeatedly generating a bubble in ink in an ink path in accordance with repeated activation of the heater element, and sep ...


3
Takuro Sekiya, Kyuhachiro Iwasaki, Takashi Kimura, Tomoaki Nakano: Bubble jet printer head with improved operational speed. Ricoh Company, Cooper & Dunham, February 5, 1991: US04990939 (74 worldwide citation)

A bubble jet printer head comprises a base plate, an ink chamber provided on the phase plate, a device for supplying ink to the ink chamber, an ink passage provided on the base plate from the ink chamber to an orifice at a front end, and a heating element at the ink passage for heating the ink to fo ...


4
Takuro Sekiya, Kyuhachiro Iwasaki: Ink jet recording head having means for controlling ink droplets. Ricoh Company, Cooper & Dunham, August 12, 1997: US05657060 (52 worldwide citation)

An ink jet recording method includes the steps of inputting a set of driving pulses to a heater element so that the heater element is repeatedly activated by the driving pulses, repeatedly generating a bubble in ink in an ink path in accordance with repeated activation of the heater element, and sep ...


5
Takuro Sekiya, Akira Sakurai, Masayoshi Katoh, Teruyuki Furuta, Kazuya Miyagaki, Ken Kanai, Atsuyuki Watada, Shunichi Sato, Koei Suzuki, Satoru Sugawara, Shinji Satoh, Shuuichi Hikichi, Naoto Jikutani, Takashi Takahashi, Akihiro Itoh: Surface-emission laser diode operable in the wavelength band of 1.1-7μm and optical telecommunication system using such a laser diode. Ricoh Company, Oblon Spivak McClelland Maier & Neustadt P C, December 13, 2005: US06975663 (51 worldwide citation)

A surface-emission laser diode includes a distributed Bragg reflector tuned to wavelength of 1.1 μm or longer, wherein the distributed Bragg reflector includes an alternate repetition of a low-refractive index layer and a high-refractive index layer, with a heterospike buffer layer having an interme ...


6
Takuro Sekiya, Kyuhachiro Iwasaki: Ink jet recording method and head. Ricoh Company, Cooper & Dunham, March 2, 1999: US05877786 (46 worldwide citation)

An ink jet recording method includes the steps of inputting a set of driving pulses to a heater element so that the heater element is repeatedly activated by the driving pulses, repeatedly generating a bubble in ink in an ink path in accordance with repeated activation of the heater element, and sep ...


7
Takuro Sekiya, Kyuhachiro Iwasaki: Ink jet recording method and head. Ricoh Company, Cooper & Dunham, March 21, 2000: US06039425 (43 worldwide citation)

An ink jet recording method includes the steps of inputting a set of driving pulses to a heater element so that the heater element is repeatedly activated by the driving pulses, repeatedly generating a bubble in ink in an ink path in accordance with repeated activation of the heater element, and sep ...


8
Takuro Sekiya, Takashi Kimura, Mitsuru Shingyouchi: Liquid jet recording head with selected bubble disappearance position. Ricoh Company, Cooper & Dunham, March 8, 1994: US05293182 (37 worldwide citation)

A liquid jet recording head includes a heater element which comprises a heat reserve layer, a resistance layer formed on the heat reserve layer, electrodes electrically connected to the resistance layer, the resistance layer generating heat when an electrical current is supplied to the resistance la ...


9
Takuro Sekiya, Kyuhachiro Iwasaki: Ink jet recording head with improved ink jetting. Ricoh Company, Cooper & Dunham, March 17, 1998: US05729257 (35 worldwide citation)

An ink jet recording method includes the steps of inputting a set of driving pulses to a heater element so that the heater element is repeatedly activated by the driving pulses, repeatedly generating a bubble in ink in an ink path in accordance with repeated activation of the heater element, and sep ...


10
Takuro Sekiya: Liquid jet recording apparatus using a fine particle dispersion recording composition. Ricoh Company, Cooper & Dunham, January 15, 2002: US06338545 (34 worldwide citation)

In an apparatus producing a high-quality and high-resolution image having high water and light resistances with an orifice having a diameter less than &phgr;25 &mgr;m (less than 500 &mgr;m