Patents by Inventor Akio Momoi
Akio Momoi 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: 7578464Abstract: A tape reel includes a hub in the shape of a bottomed-cylinder with a disc-like lower flange integrally formed at a lower end thereof and an opening formed at an upper end thereof; and an upper flange that is disc-like, has a center hole formed therein, and has a ring-shaped protrusion formed so as to protrude at a rim of the center hole, the protrusion being fitted into and fixed at the opening of the hub. The upper flange is constructed by forming the rim of the center hole thicker than other parts aside from the rim.Type: GrantFiled: September 26, 2007Date of Patent: August 25, 2009Assignee: TDK CorporationInventors: Morimasa Sasaki, Takateru Satoh, Akio Momoi, Chotaro Kouzu
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Publication number: 20080011894Abstract: A tape reel includes a hub in the shape of a bottomed-cylinder with a disc-like lower flange integrally formed at a lower end thereof and an opening formed at an upper end thereof; and an upper flange that is disc-like, has a center hole formed therein, and has a ring-shaped protrusion formed so as to protrude at a rim of the center hole, the protrusion being fitted into and fixed at the opening of the hub. The upper flange is constructed by forming the rim of the center hole thicker than other parts aside from the rim.Type: ApplicationFiled: September 26, 2007Publication date: January 17, 2008Applicant: TDK CORPORATIONInventors: Morimasa SASAKI, Takateru SATOH, Akio MOMOI, Chotaro KOUZU
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Publication number: 20070284471Abstract: A molding mold and a molding method are disclosed, for molding a flange configuration in which a flange of a reel hub portion can be maintained in a predetermined configuration. Also a tape cartridge is disclosed, which can securely prevent a tape-shaped recording medium from touching at the flange while the tape cartridge is being used.Type: ApplicationFiled: July 3, 2007Publication date: December 13, 2007Applicant: TDK CORPORATIONInventors: Takateru Satoh, Hiroki Suzuki, Akio Momoi
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Patent number: 7290734Abstract: A tape reel includes: a hub in the shape of a bottomed-cylinder with a disc-like lower flange integrally formed at a lower end thereof and an opening formed at an upper end thereof; and an upper flange that is disc-like, has a center hole formed therein, and has a ring-shaped protrusion formed so as to protrude at a rim of the center hole, the protrusion being fitted into and fixed at the opening of the hub. The hub includes a plurality of reinforcing ribs that are respectively formed in an up-down direction on an inner circumferential surface of the hub.Type: GrantFiled: December 21, 2004Date of Patent: November 6, 2007Assignee: TDK CorporationInventors: Morimasa Sasaki, Takateru Satoh, Akio Momoi, Chotaro Kouzu
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Patent number: 7281258Abstract: A disc cartridge which is capable of positively closing a disc access opening by shutter members. In the disc cartridge, a lower shell is formed with urging protuberances for urging shutter members in a manner causing the shutter members to pivotally move toward respective closing positions, and the shutter members are each formed with a protruding portion protruded from a side end face thereof such that a force for pressing the protruding portion against the urging protuberance is progressively increased after the protruding portion is brought into abutment with the urging protuberance before completion of a pivotal motion of a disc tray until the completion of the pivotal motion of the disc tray.Type: GrantFiled: July 27, 2005Date of Patent: October 9, 2007Assignee: TDK CorporationInventors: Kenji Hashizume, Akio Momoi
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Patent number: 7270780Abstract: A molding mold and a molding method are disclosed, for molding a flange configuration in which a flange of a reel hub portion can be maintained in a predetermined configuration. Also a tape cartridge is disclosed, which can securely prevent a tape-shaped recording medium from touching at the flange while the tape cartridge is being used.Type: GrantFiled: December 3, 2003Date of Patent: September 18, 2007Assignee: TDK CorporationInventors: Takateru Satoh, Hiroki Suzuki, Akio Momoi
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Publication number: 20060282846Abstract: A cartridge case includes: a case main body that has a partition wall, which constructs an enclosure for enclosing a disc-shaped medium, erected on a top surface thereof; an inner rotor that has a main portion and a side wall erected along an outer circumferential edge of the main portion and is rotatably disposed inside the case main body in a state where the side wall is fitted onto an outside of the partition wall; and a shutter that is disposed between the inner rotor and the case main body and moves as the inner rotor rotates, to open and close an access path for accessing the disc-shaped medium. The inner rotor includes bar-shaped protrusions formed on an inner circumferential surface of the side wall in a direction in which the side wall is erected.Type: ApplicationFiled: June 5, 2006Publication date: December 14, 2006Applicant: TDK CORPORATIONInventors: Hiroshi KANEDA, Masaru IKEBE, Kenji HASHIZUME, Akio MOMOI, Susumu YANAGIHARA
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Publication number: 20060282845Abstract: A disc cartridge comprises: a cartridge body including an upper shell and a lower shell at least one of which is provided with an opening for allowing disc access; a disc tray that is formed to allow a disc-like recording medium to be placed thereon and is arranged in the cartridge body to be rotatable; a pair of shutter members each including a shaft-receiving hole to which a supporting shaft formed in the disc tray is to be inserted, an annular surrounding portion that surrounds the shaft-receiving hole, and a blade portion formed integrally with the surrounding portion outside the surrounding portion, the pair of shutter members being supported by the disc tray to be rotatable and being capable of opening and closing the opening of the cartridge body, each of a pair of shutter members is a member formed by injection molding and has a plurality of gate marks caused by injection molding, one of the gate marks is formed in a surrounding portion of the shutter member and another one of the gate marks is formedType: ApplicationFiled: June 6, 2006Publication date: December 14, 2006Applicant: TDK CORPORATIONInventors: Kenji Hashizume, Akio Momoi
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Publication number: 20060265724Abstract: A disc tray of a disc cartridge includes: a bottom plate in which a tray opening for allowing disc access is formed; a ring-like sidewall that is formed to stand on the outer peripheral portion of the bottom plate; an arc-like opening connecting portion provided to serve as a reinforcement that is continuously formed from a sidewall over a tray opening in the bottom plate; and a convex portion that projects from one circumferential end of the opening connecting portion outward in the radial direction of the disc tray along the sidewall and forms a part of a concave portion for engaging with a drive-side member when the disc tray is rotated, the convex portion is hollow or partially thinned, and a gap S is formed at least between the end of the convex portion and the outer circumferential surface of the opening connecting portion.Type: ApplicationFiled: May 17, 2006Publication date: November 23, 2006Applicant: TDK CorporationInventors: Kenji Hashizume, Akio Momoi, Hiroshi Kaneda, Susumu Yanagihara
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Patent number: 7004417Abstract: This tape cartridge is provided with a tape reel being rotatable and having a reel teeth portion; and a brake-locking member having a brake teeth portion in which mating operation and mate-releasing operation can be performed with respect to the reel teeth portion. The reel teeth portion and the brake teeth portion, each has plural teeth. Each of the teeth has a taper portion being inclined toward both sides from a tip part of the taper portion and a vertical portion extending in a substantially vertical manner from both end terminals of the taper portion to a base portion. At the time of the mating, the tip part is contacted with a bottom surface of the base portion at the side of the opposite teeth, and the vertical portion is opposed to the vertical portion at the side of the opposite teeth. At the time of mating, the vertical portions of the teeth are mutually contacted and the mating state is hard to become unfitted.Type: GrantFiled: July 7, 2003Date of Patent: February 28, 2006Assignee: TDK CorporationInventors: Takateru Satoh, Akio Momoi, Hiroki Suzuki
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Patent number: 6994285Abstract: In a region more on the back surface side than on the front surface of the circumferential side surface of a magnetic plate, a circumferential projection having an outer diameter larger than that on the front surface side is formed, and the magnetic plate is fitted to a circular reel portion so as to be embedded in the circular reel portion at the circumferential projection thereof.Type: GrantFiled: December 3, 2002Date of Patent: February 7, 2006Assignee: TDK CorporationInventors: Takateru Satoh, Motohiko Shima, Akio Momoi, Hiroki Suzuki
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Publication number: 20060026624Abstract: A disc cartridge which is capable of positively closing a disc access opening by shutter members. In the disc cartridge, a lower shell is formed with urging protuberances for urging shutter members in a manner causing the shutter members to pivotally move toward respective closing positions, and the shutter members are each formed with a protruding portion protruded from a side end face thereof such that a force for pressing the protruding portion against the urging protuberance is progressively increased after the protruding portion is brought into abutment with the urging protuberance before completion of a pivotal motion of a disc tray until the completion of the pivotal motion of the disc tray.Type: ApplicationFiled: July 27, 2005Publication date: February 2, 2006Applicant: TDK CorporationInventors: Kenji Hashizume, Akio Momoi
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Publication number: 20050205708Abstract: A tape reel includes: a hub in the shape of a bottomed-cylinder with a disc-like lower flange integrally formed at a lower end thereof and an opening formed at an upper end thereof; and an upper flange that is disc-like, has a center hole formed therein, and has a ring-shaped protrusion formed so as to protrude at a rim of the center hole, the protrusion being fitted into and fixed at the opening of the hub. The hub includes a plurality of reinforcing ribs that are respectively formed in an up-down direction on an inner circumferential surface of the hub.Type: ApplicationFiled: December 21, 2004Publication date: September 22, 2005Applicant: TDK CorporationInventors: Morimasa Sasaki, Takateru Satoh, Akio Momoi, Chotaro Kouzu
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Publication number: 20040170717Abstract: A molding mold and a molding method are disclosed, for molding a flange configuration in which a flange of a reel hub portion can be maintained in a predetermined configuration. Also a tape cartridge is disclosed, which can securely prevent a tape-shaped recording medium from touching at the flange while the tape cartridge is being used.Type: ApplicationFiled: December 3, 2003Publication date: September 2, 2004Applicant: TDK CorporationInventors: Takateru Satoh, Hiroki Suzuki, Akio Momoi
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Publication number: 20040104294Abstract: This tape cartridge is provided with a tape reel being rotatable and having a reel teeth portion; and a brake-locking member having a brake teeth portion in which mating operation and mate-releasing operation can be performed with respect to the reel teeth portion. The reel teeth portion and the brake teeth portion, each has plural teeth. Each of the teeth has a taper portion being inclined toward both sides from a tip part of the taper portion and a vertical portion extending in a substantially vertical manner from both end terminals of the taper portion to a base portion. At the time of the mating, the tip part is contacted with a bottom surface of the base portion at the side of the opposite teeth, and the vertical portion is opposed to the vertical portion at the side of the opposite teeth. At the time of mating, the vertical portions of the teeth are mutually contacted and the mating state is hard to become unfitted.Type: ApplicationFiled: July 7, 2003Publication date: June 3, 2004Applicant: TDK CorporationInventors: Takateru Satoh, Akio Momoi, Hiroki Suzuki
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Patent number: 6702216Abstract: A tape cartridge comprising: a housing; a single tape reel carrying a length of tape having an outer end fixed to a leader pin, which can be taken out of the cartridge through an outlet formed in the housing by a tape draw-out member of a recording-reproducing apparatus; a door member covering the outlet; and a spring member pushing the door member towards the closed position. The spring member is a torsion coil spring comprising: two coil portions; a connecting portion linking the two coil portions; a first arm portion that extends from one coil portion, forms a first angle with the connecting portion, and has an end abutting the housing; and a second arm portion that extends from the other coil portion, forms a second angle with the connecting portion pointing in opposite direction to the first angle, and has an end fixed to the door member.Type: GrantFiled: May 21, 2002Date of Patent: March 9, 2004Assignee: TDK CorporationInventors: Motohiko Shima, Akio Momoi, Hiroshi Kaneda
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Patent number: 6651917Abstract: There is provided a tape cartridge which is capable of reliably preventing dropout of a magnetic tape without lowering durability. A tape cartridge includes a cartridge body formed by a pair of cartridge halves, one of the cartridge halves being formed with an insertion hole permitting insertion of a driving shaft of a record/playback apparatus, and a tape reel formed by a hollow cylindrical hub and a pair of flanges, the tape reel being accommodated within the cartridge body, with a tape wound around the hub. A center line average height Ra of a surface of the hub is defined to be not smaller than 0.005 &mgr;m and not larger than 0.04 &mgr;m.Type: GrantFiled: May 10, 2002Date of Patent: November 25, 2003Assignee: TDK CorporationInventors: Akio Momoi, Motohiko Shima
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Publication number: 20030146327Abstract: In a region more on the back surface side than on the front surface of the circumferential side surface of a magnetic plate, a circumferential projection having an outer diameter larger than that on the front surface side is formed, and the magnetic plate is fitted to a circular reel portion so as to be embedded in the circular reel portion at the circumferential projection thereof.Type: ApplicationFiled: December 3, 2002Publication date: August 7, 2003Inventors: Takateru Satoh, Motohiko Shima, Akio Momoi, Hiroki Suzuki
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Publication number: 20020175239Abstract: There is provided a tape cartridge which is capable of reliably preventing dropout of a magnetic tape without lowering durability. A tape cartridge includes a cartridge body formed by a pair of cartridge halves, one of the cartridge halves being formed with an insertion hole permitting insertion of a driving shaft of a record/playback apparatus, and a tape reel formed by a hollow cylindrical hub and a pair of flanges, the tape reel being accommodated within the cartridge body, with a tape wound around the hub. A center line average height Ra of a surface of the hub is defined to be not smaller than 0.005 &mgr;m and not larger than 0.04 &mgr;m.Type: ApplicationFiled: May 10, 2002Publication date: November 28, 2002Applicant: TDK CORPORATIONInventors: Akio Momoi, Motohiko Shima
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Publication number: 20020170998Abstract: This invention aims at providing a spring member exhibiting excellent function in pushing a door member covering a tape outlet towards the closed position, while occupying smaller space.Type: ApplicationFiled: May 21, 2002Publication date: November 21, 2002Inventors: Motohiko Shima, Akio Momoi, Hiroshi Kaneda