Patents by Inventor Masakazu Nakajo
Masakazu Nakajo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7621399Abstract: A cassette has a housing with a stimulable phosphor sheet stored therein, a lid mounted on an end of the housing, and an opening/closing lock mechanism mounted in the housing for locking the lid against opening and closing movement. The stimulable phosphor sheet stored in the housing is locked against displacement by a lock mechanism mounted in the housing. When the opening/closing lock mechanism is actuated to open the lid and the lock mechanism is actuated to unlock the stimulable phosphor sheet, the stimulable phosphor sheet can be removed from the housing.Type: GrantFiled: March 23, 2006Date of Patent: November 24, 2009Assignee: FUJIFILM CorporationInventor: Masakazu Nakajo
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Patent number: 7556426Abstract: A radiation cassette has a casing for storing a stimulable phosphor plate and a lid openably and closably mounted on the casing. The lid has a guide structure for guiding the stimulable phosphor plate when the radiation image recording medium is removed or inserted into the cassette while the lid is open with respect to the casing. The guide structure has a pair of engaging members fixed to an inner surface of the lid and a pair of recesses that are defined in respective opposite side edges of the stimulable phosphor plate.Type: GrantFiled: September 3, 2004Date of Patent: July 7, 2009Assignee: FUJIFILM CorporationInventors: Masakazu Nakajo, Yasunori Ohta
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Patent number: 7507983Abstract: When cassettes are placed on a conveyor disposed in a cassette loader and detectors disposed on a support plate on the conveyor detect information of identification strips on side walls of the cassettes, the cassettes are judged as being loaded properly in the cassette loader. When the detectors fail to detect the identification strips, the cassettes are judged as not being loaded in a desired state in the cassette loader.Type: GrantFiled: September 14, 2005Date of Patent: March 24, 2009Assignee: FUJIFILM CorporationInventors: Yoshihiro Ishikawa, Masakazu Nakajo, Osamu Kuroda, Yuzuru Ohtsuka, Hideki Suzuki, Yasunori Ohta
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Patent number: 7498583Abstract: Radiation detector units provided with solid-state radiation detectors are supported on a supporting section, such that the radiation detector units are located at different distances from a radiation source and arrayed in a one-dimensional direction or two-dimensional directions. One of the radiation detector units is taken as a reference unit. Image size enlargement or reduction processing is performed on each of image signals outputted from the radiation detector units other than the reference unit and in accordance with a ratio between a distance from the radiation source to the reference unit and a distance from the radiation source to each of the radiation detector units other than the reference unit. Image composing processing is performed on the image signal outputted from the reference unit and processed image signals obtained from the image size enlargement or reduction processing.Type: GrantFiled: March 31, 2006Date of Patent: March 3, 2009Assignee: Fujifilm CorporationInventors: Takashi Shoji, Masakazu Nakajo
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Patent number: 7449709Abstract: A cassette is delivered from a cassette loader through a stock unit to a releasing unit. After a stimulable phosphor panel is supplied from the cassette to a reading unit by an unlocking mechanism and a panel ejecting mechanism, the cassette is fed to a position below an erasing unit so as to wait for the stimulable phosphor panel. After recorded radiation image information is read from the stimulable phosphor panel by the reading unit, the stimulable phosphor panel is fed to the erasing unit, which erases remaining radiation image information from the stimulable phosphor panel. Thereafter, the stimulable phosphor panel is stored back into the waiting cassette, which is delivered to a cassette discharger.Type: GrantFiled: September 16, 2005Date of Patent: November 11, 2008Assignee: FUJIFILM CorporationInventors: Yuzuru Ohtsuka, Masakazu Nakajo, Osamu Kuroda, Yoshihiro Ishikawa, Hideki Suzuki, Yasunori Ohta
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Patent number: 7331710Abstract: A spring is mounted on a side of a stimulable phosphor sheet. A cassette for use in radiation image forming apparatus includes a housing and a lid hinged thereto. When the lid is closed over the housing with the stimulable phosphor sheet inserted in the cassette, the stimulable phosphor sheet is lowered toward a bottom surface of the housing, and the spring presses a side wall of the housing and is also lowered toward the bottom surface. The stimulable phosphor sheet is positioned and held with respect to the side wall by the spring, and housed in a space defined by the housing and the lid.Type: GrantFiled: December 30, 2004Date of Patent: February 19, 2008Assignee: FUJIFILM CorporationInventor: Masakazu Nakajo
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Patent number: 7288780Abstract: A plurality of stacked cassettes are loaded into a cassette loader, and the cassettes loaded in the cassette loader are changed in attitude and stocked in an erected state in a stock unit. After the cassettes are processed, they are discharged in an erected state into a cassette discharger.Type: GrantFiled: September 21, 2005Date of Patent: October 30, 2007Assignee: Fujifilm CorporationInventors: Yuzuru Ohtsuka, Masakazu Nakajo, Osamu Kuroda, Yoshihiro Ishikawa, Hideki Suzuki, Yasunori Ohta
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Patent number: 7250622Abstract: After a housing of a cassette is opened by a suction cup, then a stimulable phosphor sheet is removed from the cassette by a shiftable roller and then fed in an auxiliary scanning direction by a feed mechanism. While being fed in the auxiliary scanning direction, the stimulable phosphor sheet is irradiated with a laser beam emitted from a stimulating optical system. Light emitted from the stimulable phosphor sheet upon exposure to the laser beam is guided through a light guide to a photoelectric transducer. After the recorded radiation image information is read from the stimulable phosphor sheet, the stimulable phosphor sheet is stored back into the cassette, and erasing light from erasing light sources is applied to the stimulable phosphor sheet in the cassette to erase remaining radiation image information from the stimulable phosphor sheet.Type: GrantFiled: January 21, 2005Date of Patent: July 31, 2007Assignee: Fujifilm CorporationInventors: Masakazu Nakajo, Yasunori Ohta, Osamu Kuroda, Yuzuru Ohtsuka, Yoshihiro Ishikawa, Hideki Suzuki
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Patent number: 7242011Abstract: A radiation image forming unit has a stimulable phosphor sheet and a case. The stimulable phosphor sheet includes a phosphor layer and a frame covering the four sides of the phosphor layer. The frame has a recess, and a lead sheet for blocking backward scattered rays is replaceably mounted in the recess by a double-sided tape. The radiation image forming unit may be used without the lead sheet. The lead sheet may be replaced with another lead sheet having a different thickness.Type: GrantFiled: February 27, 2004Date of Patent: July 10, 2007Assignee: Fujifilm CorporationInventor: Masakazu Nakajo
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Patent number: 7138647Abstract: An image reading apparatus includes a casing having a side panel which has a cassette loading slot defined therein for loading a cassette therein. A stimulable phosphor sheet stored in the cassette loaded in the cassette loading slot is removed from the cassette and fed vertically downwardly along a first vertical feed path. Radiation image information recorded in the stimulable phosphor sheet is read by a reader. Thereafter, the stimulable phosphor sheet is stored back into the cassette, which is then delivered toward a cassette unloading slot by a sliding displacement mechanism. The stimulable phosphor sheet is removed again from the cassette, and fed along a second vertical feed path for an eraser to erase remaining radiation image information from the stimulable phosphor sheet.Type: GrantFiled: March 22, 2006Date of Patent: November 21, 2006Assignee: Fuji Photo Film Co., LtdInventor: Masakazu Nakajo
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Publication number: 20060219926Abstract: Radiation detector units provided with solid-state radiation detectors are supported on a supporting section, such that the radiation detector units are located at different distances from a radiation source and arrayed in a one-dimensional direction or two-dimensional directions. One of the radiation detector units is taken as a reference unit. Image size enlargement or reduction processing is performed on each of image signals outputted from the radiation detector units other than the reference unit and in accordance with a ratio between a distance from the radiation source to the reference unit and a distance from the radiation source to each of the radiation detector units other than the reference unit. Image composing processing is performed on the image signal outputted from the reference unit and processed image signals obtained from the image size enlargement or reduction processing.Type: ApplicationFiled: March 31, 2006Publication date: October 5, 2006Inventors: Takashi Shoji, Masakazu Nakajo
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Publication number: 20060213798Abstract: A cassette has a housing with a stimulable phosphor sheet stored therein, a lid mounted on an end of the housing, and an opening/closing lock mechanism mounted in the housing for locking the lid against opening and closing movement. The stimulable phosphor sheet stored in the housing is locked against displacement by a lock mechanism mounted in the housing. When the opening/closing lock mechanism is actuated to open the lid and the lock mechanism is actuated to unlock the stimulable phosphor sheet, the stimulable phosphor sheet can be removed from the housing.Type: ApplicationFiled: March 23, 2006Publication date: September 28, 2006Inventor: Masakazu Nakajo
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Publication number: 20060214124Abstract: An image reading apparatus includes a casing having a side panel which has a cassette loading slot defined therein for loading a cassette therein. A stimulable phosphor sheet stored in the cassette loaded in the cassette loading slot is removed from the cassette and fed vertically downwardly along a first vertical feed path. Radiation image information recorded in the stimulable phosphor sheet is read by a reader. Thereafter, the stimulable phosphor sheet is stored back into the cassette, which is then delivered toward a cassette unloading slot by a sliding displacement mechanism. The stimulable phosphor sheet is removed again from the cassette, and fed along a second vertical feed path for an eraser to erase remaining radiation image information from the stimulable phosphor sheet.Type: ApplicationFiled: March 22, 2006Publication date: September 28, 2006Inventor: Masakazu Nakajo
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Publication number: 20060060804Abstract: A cassette is delivered from a cassette loader through a stock unit to a releasing unit. After a stimulable phosphor panel is supplied from the cassette to a reading unit by an unlocking mechanism and a panel ejecting mechanism, the cassette is fed to a position below an erasing unit so as to wait for the stimulable phosphor panel. After recorded radiation image information is read from the stimulable phosphor panel by the reading unit, the stimulable phosphor panel is fed to the erasing unit, which erases remaining radiation image information from the stimulable phosphor panel. Thereafter, the stimulable phosphor panel is stored back into the waiting cassette, which is delivered to a cassette discharger.Type: ApplicationFiled: September 16, 2005Publication date: March 23, 2006Inventors: Yuzuru Ohtsuka, Masakazu Nakajo, Osamu Kuroda, Yoshihiro Ishikawa, Hideki Suzuki, Yasunori Ohta
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Publication number: 20060060805Abstract: A plurality of stacked cassettes are loaded into a cassette loader, and the cassettes loaded in the cassette loader are changed in attitude and stocked in an erected state in a stock unit. After the cassettes are processed, they are discharged in an erected state into a cassette discharger.Type: ApplicationFiled: September 21, 2005Publication date: March 23, 2006Inventors: Yuzuru Ohtsuka, Masakazu Nakajo, Osamu Kuroda, Yoshihiro Ishikawa, Hideki Suzuki, Yasunori Ohta
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Publication number: 20060060803Abstract: When cassettes are placed on a conveyor disposed in a cassette loader and detectors disposed on a support plate on the conveyor detect information of identification strips on side walls of the cassettes, the cassettes are judged as being loaded properly in the cassette loader. When the detectors fail to detect the identification strips, the cassettes are judged as not being loaded in a desired state in the cassette loader.Type: ApplicationFiled: September 14, 2005Publication date: March 23, 2006Inventors: Yoshihiro Ishikawa, Masakazu Nakajo, Osamu Kuroda, Yuzuru Ohtsuka, Hideki Suzuki, Yasunori Ohta
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Publication number: 20050189505Abstract: A preceding erasure time stored in an IC chip embedded in a stimulable phosphor sheet is read in step S3. After radiation image information is read from the stimulable phosphor sheet in step S5, an elapsed time up to the present time is calculated in step S6, and a required amount of erasing light corresponding to the elapsed time is read from a required-amount-of-applied-light memory in step S7. An erasing light application time is calculated from the radiation image information and the read required amount of erasing light in step S8. Erasing light sources are energized for the calculated erasing light application time to apply erasing light to the stimulable phosphor sheet to erase remaining radiation energy therefrom in step S10.Type: ApplicationFiled: February 24, 2005Publication date: September 1, 2005Inventors: Masakazu Nakajo, Hideki Suzuki
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Publication number: 20050156126Abstract: After a housing of a cassette is opened by a suction cup, then a stimulable phosphor sheet is removed from the cassette by a shiftable roller and then fed in an auxiliary scanning direction by a feed mechanism. While being fed in the auxiliary scanning direction, the stimulable phosphor sheet is irradiated with a laser beam emitted from a stimulating optical system. Light emitted from the stimulable phosphor sheet upon exposure to the laser beam is guided through a light guide to a photoelectric transducer. After the recorded radiation image information is read from the stimulable phosphor sheet, the stimulable phosphor sheet is stored back into the cassette, and erasing light from erasing light sources is applied to the stimulable phosphor sheet in the cassette to erase remaining radiation image information from the stimulable phosphor sheet.Type: ApplicationFiled: January 21, 2005Publication date: July 21, 2005Inventors: Masakazu Nakajo, Yasunori Ohta, Osamu Kuroda, Yuzuru Ohtsuka, Yoshihiro Ishikawa, Hideki Suzuki
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Publication number: 20050155886Abstract: A spring is mounted on a side of a stimulable phosphor sheet. A cassette for use in radiation image forming apparatus includes a housing and a lid hinged thereto. When the lid is closed over the housing with the stimulable phosphor sheet inserted in the cassette, the stimulable phosphor sheet is lowered toward a bottom surface of the housing, and the spring presses a side wall of the housing and is also lowered toward the bottom surface. The stimulable phosphor sheet is positioned and held with respect to the side wall by the spring, and housed in a space defined by the housing and the lid.Type: ApplicationFiled: December 30, 2004Publication date: July 21, 2005Inventor: Masakazu Nakajo
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Publication number: 20050051447Abstract: A radiation cassette has a casing for storing a stimulable phosphor plate and a lid openably and closably mounted on the casing. The lid has a guide structure for guiding the stimulable phosphor plate when the radiation image recording medium is removed or inserted into the cassette while the lid is open with respect to the casing. The guide structure has a pair of engaging members fixed to an inner surface of the lid and a pair of recesses that are defined in respective opposite side edges of the stimulable phosphor plate.Type: ApplicationFiled: September 3, 2004Publication date: March 10, 2005Inventors: Masakazu Nakajo, Yasunori Ohta