Fuji Photo Film Company, Limited

Fujifilm Corporation

Other

Fuij Photo Film Co., Ltd.

Yusuke Ishihara

Hideaki Shiga

Daisuke Takahashi

Seiji Tsuyuki

Kiyoo Morita

Jeffrey S McAllister

Robert Ralph Heinze

Hidetoshi Yamamoto

Thomas R Albrecht

Yasushi Hatano

Kazuo Hiraguchi

Wataru Iino

Kenji Ishikawa

Kouta Kitamura

Naoki Okutsu

Seiichi Watanabe

Tadashi Irie

Masao Yabe

Thomas W Von Alten

Hideki Matsuzawa

Takuji Daihisa

Ed Childers

The object of the invention is to provide a magnetic tape cartridge, in which a release pad can be assembled securely by a robot. A magnetic tape cartridge including: a reel around which a magnetic tape is wound; a cartridge case which houses the reel in a locked position; a release pad for releasing locking of the reel; and a cup-like hub of the reel in which the release pad is mounted, wherein a plurality of guide holes for allowing a plurality of lock release pins to penetrate therein, which extend from the lower surface of the release pad, are made in the periphery of a base plate of the cup-like hub, and a plurality of pairs of guide ribs, which are capable of guiding the plurality of lock release pins to the plurality of guide holes, stand inside the cup-like hub corresponding to the plurality of guide holes.

Method for determining a relative position of a part of a magnetic tape cartridge

In a recording tape cartridge, cut-out portions are formed at an inner peripheral edge portion of a metal plate. By providing gates at the cut-out portions, the metal plate is insert molded without depending on submarine gates. Because the gates are provided, at the time of molding a reel hub, a molding material flows radially from a hole portion toward a tubular portion and a lower flange.

Recording tape cartridge and method of manufacturing said cartridge

A recording tape cartridge including: a reel, and gear teeth are provided at an inner side of a floor portion of a reel hub on which a recording tape is wound; a case which accommodates the reel, and an engaging projection is formed at a surface of the case opposing the floor portion of the reel hub; a braking member having a disc, and a braking gear, which is annular and which can mesh with the gear teeth, is provided at one surface of the disc, and the braking member can move within the case in a direction of thickness of the case; and a groove wall portion standing erect at the disc and demarcating an insertion groove in which the engaging projection enters over an entire stroke of movement of the braking member. The groove wall portion impedes rotation of the braking member, and guides the braking member.

Method of manufacturing a recording tape cartridge

A magnetic tape cartridge is equipped with a cartridge, a single tape reel, a tape leader pin, and a U-shaped clip. The cartridge case is formed by fastening upper and lower cases of synthetic resin together and has a tape leader opening formed in the upper and lower side walls of the upper and lower cases. The single tape reel has magnetic tape wound thereon and is rotatably housed within the cartridge case. The tape leader pin is firmly attached to a leading end of the magnetic tape, and is detachably held in an upright state between the upper and lower cases so that it faces the tape leader opening. The U-shaped clip is attached to walls near the tape leader opening to fasten the upper and lower cases together, whereby the fastening strength of the upper and lower cases is enhanced.

Magnetic tape cartridge

In a recording tape cartridge, a reel has a reel hub around which a magnetic tape is wound. An annular reel gear is formed at an outer surface of a bottom portion of the reel hub. Rotation of the reel is impeded by a braking member engaging with an engaging gear formed at an inner surface of the bottom portion. When a clutch member is pressed by a rotating shaft of a drive device, the clutch member is guided by rotation restricting ribs which are engaged with rotation restricting grooves such that relative rotation is impossible, and the clutch member moves in an axial direction of the reel and cancels engagement of the braking member with the engaging gear. A press operation surface and the rotation restricting grooves are positioned further toward a radial direction inner side than the reel gear.

Recording tape cartridge

A recording tape cartridge has: a case rotatably accommodating a single reel with which one end portion of a recording tape is engaged and on which the recording tape is wound, the case having an opening which is formed at a corner portion of the case at a side of loading the case into a drive device, the opening being for pulling-out of a leader member attached to another end portion of the recording tape; and a projecting portion provided at an inner surface of the case in a vicinity of the opening. The projecting portion is provided substantially parallel to a direction of loading the case into the drive device.

A method of assembling a magnetic tape cartridge where an opening, through which a magnetic tape is drawn out, is provided in part of a sidewall of a cartridge case across a lower half and an upper half of the cartridge case. A slide door that opens and closes the opening is mounted between guide portions provided in the cartridge lower and upper halves, while stressing the slide door with a spring member toward a position in which the opening is closed. During mounting, the slide door is stressed with the spring member toward the position in which the opening is closed by fitting a lower edge of the slide door into the guide portion of the lower half A mounting position of the slide door is retained by holding an end of the slide door facing a direction in which the slide door moves to close the opening.

Method for assembling a magnetic tape cartridge

A magnetic tape cartridge includes a cartridge casing formed by upper and lower casing halves connected together, and a single reel around which a magnetic tape with a leader pin fixed to the leading end of the magnetic tape is wound and which is contained in the cartridge casing for rotation. The leader pin is removably held in a tape draw-out opening with its axial direction directed in the vertical direction under urging force of a spring member acting on its upper and lower end portions sideways with the upper and lower end portions received in recesses respectively formed in the upper and lower casing halves. An inclined surface directed obliquely downward is formed at least a part of the side wall of the recess formed in the upper casing half opposed to the direction in which the spring member urges the leader pin.

A recording tape cartridge has a reel accommodated within a case, an engaging portion provided at a floor portion of a reel hub; a braking member provided so as to be unable to rotate within the case, and approaching and moving away from the floor portion of the reel hub, and able to assume a rotation locked position at which the braking member engages with the engaging portion, and a rotation permitted position at which a state of engagement with the engaging portion is cancelled; and a releasing member disposed at an inner side of a guide wall portion provided at the floor portion of the reel hub, and when the reel is rotated, the releasing member holds the braking member at the rotation permitted position while abutting the braking member. The braking member has a tubular wall portion which overlaps with an outer side of the guide wall portion.

A recording tape cartridge has: a case rotatably accommodating a reel on which a recording tape is wound; a reel area rib provided at an inner surface of the case, and defining a range in which the reel is accommodated; and a contact preventing mechanism which is provided at an inner surface of the case, is positioned in a reel hub forming the reel, and prevents contact between the reel area rib and the reel.

A single reel with magnetic tape wound thereon is housed in a case. A restraining member, for restricting rotation of the reel by moving toward or away from the reel, is urged in a restraining direction by an urging member. The pushing-up portions of a releasing member are inserted into the through holes bored in the reel gear of the reelso that the lower ends can abut a driving gear. The releasing member moves the restraining member in a releasing direction by moving according to the chucking operation of drive-side rotation drive means. In this manner, reel-rotation restraining means allows rotation of the reel when being used and restricts the rotation when not being used. In this construction, each of the through holes is bored between the tooth edges of the reel gear so that the releasing member can perform a reliable releasing operation.

A magnetic tape cartridge is provided, in which the mating of the lower half and the upper half can be easily performed and which is applicable to automated assembly, when the magnetic tape cartridge having a sliding door is assembled. The rib projects from the upper section of the first guide wall in the direction of the opposite second guide wall. On the other hand, the groove, which faces the rib, is carved on the inner side surface of the sliding door. The rib engages with the groove, thereby restricting the vertical displacement of the sliding door. Also, the engagement of the rib and the groove guides the sliding door in the guide channel freely.

A magnetic tape cartridge includes a cartridge casing and a single reel which is contained in the cartridge casing for rotation. A brake member of the magnetic cartridge is provided with a brake gear and is movable up and down between an operative position and a retracted position. The reel is provided with a reel gear which is brought into mesh with a drive gear of a tape drive mechanism and a through hole through which a push rod extending from a brake release member projects to be brought into abutment against the drive gear of the tape drive mechanism so that the brake release member moves the brake member to the retracted position. The through hole opens in an area which is slightly wider than tips of teeth of the reel gear, wherein the area includes a pair of opposed flanks of the reel gear which form a valley.

Magnetic tape cartridge with brake release push rod extending through reel hole wider than only one reel gear pitch

A magnetic tape cartridge includes a cartridge casing and a single reel which is contained in the cartridge casing for rotation. The reel has a reel hub in the form of a cylindrical member which has a bottom wall and is provided with an opening and a stopper gear formed on the bottom wall. A brake member is provided with a brake gear and is movable up and down between an operative position where the brake gear is brought into engagement with the stopper gear to prevent rotation of the reel and a retracted position where the brake gear is disengaged from the stopper gear to permit rotation of the reel. The brake member is normally urged toward the operative position and moved to the retracted position by a pusher member of a tape drive system which acts on the brake member through the opening in the reel hub when the magnetic tape cartridge is loaded in the tape drive system. A continuous wall portion is erected around the opening in the reel hub, and the brake member includes a horizontal portion and a continuous skirt portion which extends downward from the horizontal portion and is in contact with the continuous wall portion of the reel hub to close the opening together with the horizontal portion. The brake member is moved between the operative position and the retracted position with the skirt portion kept in contact with the continuous wall portion of the reel hub.

Magnetic tape cartridge with rotatably-mounted multi-projection brake release member

A cartridge casefor a magnetic tape cartridge comprises a cartridge caseconsisting of a lower halfand an upper half. The lower halfis provided with retaining ribseach having a retaining slanted surfacesuch that a plate-like cartridge memoryis positioned on the retaining slanted surfaceswith its one sidelowered and is obliquely supported with respect to a bottom plateof the lower half. The upper halfis provided with supporting members for supporting various non-resilient constituent parts positioned on the lower halfand including the cartridge memory. The upper halfis provided with a stopper rodsuch that when the upper halfis assembled with the lower half, the stopper rodreaches a cartridge memory-rising region before the supporting members contact with the non-resilient constituent parts on the lower half

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Kanagawa, Japan

Yusuke Ishihara