Patents by Inventor Yoshiyuki Nishizato
Yoshiyuki Nishizato 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: 7627281Abstract: A sheet tray (1) includes at least one sheet detecting sensor (10) for detecting a sheet set on a sheet setting surface (2). The sheet detecting sensor (10) includes (i) a movable detecting section having a projecting section which projects from the sheet setting surface (2), and (ii) a detecting section for detecting rotation of the movable detecting section, and the projecting section have a ball-like shape. This makes it possible to provide (i) a sheet tray which is able to prevent breakage of sheet and breakage of the projecting section even when setting the sheet on the sheet setting surface from any direction and any angle; (ii) a sheet transporting apparatus including the sheet tray; and (iii) an image forming apparatus including the sheet tray.Type: GrantFiled: April 1, 2004Date of Patent: December 1, 2009Assignee: Sharp Kabushiki KaishaInventors: Kenji Tanaka, Yoshiyuki Nishizato, Kenji Nakanishi, Tomohiko Okada, Akira Kohno
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Patent number: 7464924Abstract: A sheet feeder device is provided with a pick-up roller driving section which is operative to position the pick-up roller into a retracted position spaced a predetermined distance apart from a stack of document sheets on a document tray before and after the operation for feeding the series of document sheets, into a sheet feed position in which the pick-up roller abuts against the stack of document sheets for feeding the document sheets at an occasion of feeding of each of the document sheets in the operation for feeding the series of document sheets, and into the standby position above and close to the height of a stack of a maximum load number of document sheets carried on the document tray during a period from a point in time just after feeding of one sheet to a point in time just before feeding of a succeeding sheet.Type: GrantFiled: June 24, 2004Date of Patent: December 16, 2008Assignee: Sharp Kabushiki KaishaInventors: Yasumasa Morimoto, Yoshiyuki Nishizato, Masato Tamehira, Syoutaro Okamoto, Yoshiyuki Nagai
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Patent number: 7398970Abstract: In the context of a structure wherein outer casing(s) is/are disposed so as to permit opening and closing about shaft(s), stopper member(s) and engagement piece(s) engaging with such stopper member(s) being disposed at such outer casing(s) so as to permit independent displacement in pivoting fashion about shaft(s) for each thereof, one end(s) of arm member(s) is/are supported by outer casing(s) so as to permit displacement in pivoting fashion, and shaft(s) of stopper member(s) is/are secured to other end(s) of such arm member(s). In addition, when bottom region(s) of stopper member(s) in engaged state(s) with engagement piece(s) abuts or abut and is/are pressed upward by original(s) loaded in original tray(s) during closing of outer casing(s) which had at least immediately prior thereto been in open state(s), this causes other end(s) of arm member(s) to be displaced upward in pivoting fashion, in accompaniment to which stopper member(s) is/are lifted upward.Type: GrantFiled: February 18, 2004Date of Patent: July 15, 2008Assignee: Sharp Kabushiki KaishaInventors: Yasumasa Morimoto, Masato Tamehira, Yoshinori Shiraishi, Masatsugu Ohishi, Yoshiyuki Nishizato
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Patent number: 7320464Abstract: An original reading device includes a registration roller located upstream of an original reading position in an original transport path for adjusting the timing of feeding an original to the original reading position. There is at least one original feed roller for transporting the original which has been fed from an original loading tray into the original transport path toward the registration roller. A rotary motion controller is also provided, and it causes the original feed roller closest to the registration roller to rotate when a rear part of the original close to a trailing edge thereof passes over the original feed roller closest to the registration roller.Type: GrantFiled: July 14, 2004Date of Patent: January 22, 2008Assignee: Sharp Kabushiki KaishaInventors: Kengo Matsuyama, Kenji Tanaka, Yoshiyuki Nishizato, Yasumasa Morimoto, Masato Tamehira
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Patent number: 7240401Abstract: A hinge mechanism of an image forming apparatus supporting a platen cover for holding an original at a fixed position on a platen glass includes a hinge unit for supporting the platen cover in such a manner that the platen cover can be opened and closed by swinging it up and down, a compression coil spring for biasing the platen cover in its opening direction, and a hinge holder attached to a housing of the apparatus for accommodating the compression coil spring. The hinge unit is provided with a hinge torque keeping mechanism which causes the compression coil spring to produce a specific amount of hinge torque to bias the platen cover in its opening direction even when the platen cover is closed.Type: GrantFiled: September 4, 2003Date of Patent: July 10, 2007Assignee: Sharp Kabushiki KaishaInventors: Masato Tamehira, Yoshiyuki Nishizato, Yasumasa Morimoto, Yoshitaka Matsumoto
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Publication number: 20060216088Abstract: A sheet tray (1) includes at least one sheet detecting sensor (10) for detecting a sheet set on a sheet setting surface (2). The sheet detecting sensor (10) includes (i) a movable detecting section having a projecting section which projects from the sheet setting surface (2), and (ii) a detecting section for detecting rotation of the movable detecting section, and the projecting section have a ball-like shape. This makes it possible to provide (i) a sheet tray which is able to prevent breakage of sheet and breakage of the projecting section even when setting the sheet on the sheet setting surface from any direction and any angle; (ii) a sheet transporting apparatus including the sheet tray; and (iii) an image forming apparatus including the sheet tray.Type: ApplicationFiled: April 1, 2004Publication date: September 28, 2006Inventors: Kenji Tanaka, Yoshiyuki Nishizato, Kenji Nakanishi, Tomohiko Okada, Akira Kohno
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Publication number: 20050023745Abstract: A sheet feeder device is provided with a pick-up roller driving section which is operative to position the pick-up roller into a retracted position spaced a predetermined distance apart from a stack of document sheets on a document tray before and after the operation for feeding the series of document sheets, into a sheet feed position in which the pick-up roller abuts against the stack of document sheets for feeding the document sheets at an occasion of feeding of each of the document sheets in the operation for feeding the series of document sheets, and into the standby position above and close to the height of a stack of a maximum load number of document sheets carried on the document tray during a period from a point in time just after feeding of one sheet to a point in time just before feeding of a succeeding sheet.Type: ApplicationFiled: June 24, 2004Publication date: February 3, 2005Inventors: Yasumasa Morimoto, Yoshiyuki Nishizato, Masato Tamehira, Syoutaro Okamoto, Yoshiyuki Nagai
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Publication number: 20050012969Abstract: An original reading device includes a registration roller located upstream of an original reading position in an original transport path for adjusting the timing of feeding an original to the original reading position. There is at least one original feed roller for transporting the original which has been fed from an original loading tray into the original transport path toward the registration roller. A rotary motion controller is also provided, and it causes the original feed roller closest to the registration roller to rotate when a rear part of the original close to a trailing edge thereof passes over the original feed roller closest to the registration roller.Type: ApplicationFiled: July 14, 2004Publication date: January 20, 2005Applicant: Sharp Kabushiki KaishaInventors: Kengo Matsuyama, Kenji Tanaka, Yoshiyuki Nishizato, Yasumasa Morimoto, Masato Tamehira
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Publication number: 20040188918Abstract: In the context of a structure wherein outer casing(s) is/are disposed so as to permit opening and closing about shaft(s), stopper member(s) and engagement piece(s) engaging with such stopper member(s) being disposed at such outer casing(s) so as to permit independent displacement in pivoting fashion about shaft(s) for each thereof, one end(s) of arm member(s) is/are supported by outer casing(s) so as to permit displacement in pivoting fashion, and shaft(s) of stopper member(s) is/are secured to other end(s) of such arm member(s). In addition, when bottom region(s) of stopper member(s) in engaged state(s) with engagement piece(s) abuts or abut and is/are pressed upward by original(s) loaded in original tray(s) during closing of outer casing(s) which had at least immediately prior thereto been in open state(s), this causes other end(s) of arm member(s) to be displaced upward in pivoting fashion, in accompaniment to which stopper member(s) is/are lifted upward.Type: ApplicationFiled: February 18, 2004Publication date: September 30, 2004Inventors: Yasumasa Morimoto, Masato Tamehira, Yoshinori Shiraishi, Masatsugu Ohishi, Yoshiyuki Nishizato
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Publication number: 20040045129Abstract: A hinge mechanism of an image forming apparatus supporting a platen cover for holding an original at a fixed position on a platen glass includes a hinge unit for supporting the platen cover in such a manner that the platen cover can be opened and closed by swinging it up and down, a compression coil spring for biasing the platen cover in its opening direction, and a hinge holder attached to a housing of the apparatus for accommodating the compression coil spring. The hinge unit is provided with a hinge torque keeping mechanism which causes the compression coil spring to produce a specific amount of hinge torque to bias the platen cover in its opening direction even when the platen cover is closed.Type: ApplicationFiled: September 4, 2003Publication date: March 11, 2004Inventors: Masato Tamehira, Yoshiyuki Nishizato, Yasumasa Marimoto, Yoshitaka Matsumoto