Abstract: The present invention aim at providing a magnetic tape cartridge, which can be assembled using an automated products line by enabling the assembling operation of a spring member and a slide door with ease.

Abstract: A door member for a tape cartridge capable of automating the operation of mounting a spring member thereon. A door body is in the form of a flat plate. A spring-mounting portion is in the form of a flat plate and extends from the door body and has one end face in which opens an insertion hole formed therein for having a foremost end of a spring member inserted therein. One surface-side wall and another surface-side wall define the insertion hole from an opening-side region of the insertion hole toward the end face to an innermost region of the insertion hole. Cutouts are alternately formed in the one surface-side wall and the other surface-side wall, such that the cutouts communicate with the insertion hole. A protuberance is formed on an inner surface of the one surface-side wall facing the innermost region, for engagement with the foremost end of the spring member.

Abstract: 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.

Abstract: A recording tape cartridge which can prevent inclination of a case relative to a loading direction when a door is moved in an aperture opening direction by an operation of loading the cartridge into a drive device. The aperture is closed by a door provided at a corner portion between a front wall and a right wall. An engaging protrusion fixed at the drive device is engaged with an operation protrusion of the door by the operation of loading the cartridge into the drive device in an arrow A direction, and the aperture is opened. At this time, an engaging member provided at a bucket which moves in the arrow A direction with the case engages with an engagement surface of a cell retention notch provided at a left end portion of the case. Thus, torque that acts on the case in accordance with opening of the aperture is counteracted.

Abstract: A method of loading a film assembly comprising a first film container (13) which may be a conventional film cassette and an additional film container (15, 102, 202, 302, 402, 502) having a length of film wound in one of the containers and extending to the other, comprises the steps of: (a) providing a coiled length of film which may be a bulk roll (52) and attaching a free end to a film winding tool (34); (b) rotating the film winding tool (34) to wind the film into a coil about the tool (34); (c) before or after step (b), enclosing the coil in the additional film container (15, 102, 202, 302, 402, 502) so that the film extends through a film slot thereof, and removing the film winding tool (34). The invention also resides in a film container for use in the method, and in an assembly so formed.

Abstract: When a sheet cassette having a roll of paper is attached to a body of a printer, a leading edge of a sheet is always brought to position at a certain position. When the sheet cassette is not attached to the printer body, a stopper, provided near an end of a lever, protrudes to the outside from an opening, so that the leading edge of the sheet, which has passed between a pair of correcting rollers, abuts against the stopper. When the sheet cassette is attached to the printer body, the lever rotates in a clockwise direction, so that the stopper retracts in the opening.

Abstract: 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.

Abstract: A magnetic tape cartridge has a single reel including a circular lower flange and a circular upper flange, a magnetic tape which is wound between the upper flange and the lower flange and a cartridge case including a lower case and an upper case. The upper flange closes a circular second opening of the upper case to form a central portion on an upper side of the cartridge case. It has become possible to provide a magnetic tape cartridge that has a reduced total thickness and is also advantageous in terms of costs. A magnetic tape cartridge can be also realized which is unlikely to be damaged even if it is subjected to careless handling.

Abstract: 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.

Abstract: 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.

Abstract: 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 reel 2 so 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.

Abstract: In a magazine, when a lid is opened for loading a recording material, a discrimination pin is unlocked and shifted from a first position to a second position. When a magazine is set to a printer processor, a positioning pin presses the discrimination pin to shift to the first position, at which the discrimination pin is locked. After removal of the magazine from the printer processor, the discrimination pin is in the first position. When the lid is opened to load fresh recording material in the magazine, the discrimination pin is in the second position. It is discriminated by detecting the position of the discrimination pin whether the magazine is a partially used one. When the partially used magazine is set to the printer processor, a forward edge of the recording material is not cut.

Abstract: A leader tape having: a support; an upper layer containing a powder, a binder, and a lubricant; and a lower layer containing a powder, a binder, and a lubricant which is at least 1.12 times as much as the lubricant of the upper layer; wherein the support, the lower layer, and the upper layer is in this order.

Abstract: The self-centering tape reel for a single reel tape cartridge provides a magnetic tape reel that is equipped with one or more features to center the tape reel with respect to a rotatably driven feature, such as a drive chuck, in the tape drive that rotates the tape reel. The self-centering tape reel uses a chamfered ring that encircles the drive teeth formed on the tape reel that engage the drive chuck. The chamfered ring fits into a chamfer that is formed in the circumference of the spline access hole located in the bottom of the tape cartridge housing.

Abstract: A reel chucking structure comprises a rotation drive transmission part for transmission of rotation drive between a reel for winding a tape thereon and a spindle for driving and rotating the reel. The rotation drive transmission part is disposed in a plane extending substantially perpendicularly to a rotation axis. A projecting portion and a recessed portion for making the rotation axis of the reel coincide with the rotation axis of the spindle and projections and recesses for securing the spindle and reel in the rotation direction are disposed at different positions in the plane independently of each other.

Abstract: 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.

Abstract: A tape cartridge comprising a housing, a tape reel disposed within that housing, where that tape reel is capable of rotation around a first axis, and where that tape reel includes a hub and a reel coupling which is engageable with a motor coupling for rotation of the tape reel. The tape cartridge further includes a brake plate disposed within the hub, where that brake plate is capable of moving in a first direction and in an opposing second direction along the first axis, but where the brake plate is not capable of rotation around the first axis. The brake plate includes a first side, an opposing second side, a brake plate gear disposed on the second side, and a fixturing assembly disposed on the first side. The tape cartridge further includes a clutch plate disposed within the hub, where that clutch plate is capable of moving in a first direction and in an opposing second direction along the first axis, and where that clutch plate is capable of rotation around the first axis.

Abstract: A seven-sided housing for an information storage medium, where one of those seven sides is moveable in two planes to allow access to an information storage medium disposed therein. A portable data storage cartridge which includes an information storage medium disposed in Applicants' housing. A method to read information from, and/or write information to, the information storage medium disposed within Applicants' portable data storage cartridge. An information storage and retrieval system which includes one or more of Applicants' portable data storage cartridges. A method to read information from, and/or write information to, an information storage medium disposed in Applicants' data storage cartridge.

Abstract: Stackable rotary devices form a multi-position mechanical indicator for a portable data storage cartridge. Each rotary device is a right cylindrical section, and is separately rotatable in a chamber of the cartridge. A peripheral surface of the rotary device has an encoded pattern of 1) at least one cylindrical surface and at least one facet interrupting the cylindrical surface, or of 2) readable indicia, located at various angularly spaced rotational positions. At differing rotational positions of the rotary devices, at least one or none of the facets or readable indicia are positioned at an exterior wall opening of the cartridge chamber.

Abstract: 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 reel 2 so 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.

Abstract: A recording tape cartridge in which melting, abrasion or the like does not occur at a portion of abutting of a brake member with a release member, or with a release portion of a drive device, during rotation of a reel. In this recording tape cartridge, a magnetic tape is wound onto the reel at a reel hub inside a case. A brake member is non-rotatably provided inside the case. The reel is rotation-locked when the brake member is disposed at a rotation-locking position, at which the brake member engages with an engaging protrusion of a bottom portion. A release pad is disposed between the bottom portion and the brake member and abuts against both thereof. When the release pad holds the brake member at a rotation-enabling position, the reel is rotatable.

Abstract: A recording tape cartridge enabling proper assembly of a brake member which blocks rotation of a reel during non-use. A magnetic tape is wound on a reel accommodated in a case. The brake member is non-rotatably supported in the case and moves toward/away from a base portion inside a reel hub. Rotation of the reel is disabled when a brake gear provided at a disc portion meshes with gear teeth, and rotation is enabled when this meshing is released. Tapering walls stand along a circular periphery larger in diameter than an outer diameter of the brake member and coaxial with the hub. When the brake member is being inserted into the hub, the brake member is guided, at the disc portion and at a rim portion extending out from the disc portion, by the tapering walls to a position at which the brake gear meshes with the gear teeth.

Abstract: A recording tape cartridge is formed from a substantially rectangular case. The case is formed from an upper case, at which a first peripheral wall stands erect at a ceiling plate, and a lower case, at which a second peripheral wall stands erect at a floor plate. The case rotatably accommodates a reel on which a recording tape is wound. At least one screw boss, which is for joining the upper case and the lower case together, is disposed at a position of the upper case and the lower case. The screw boss has a structure in which a convex portion and a concave portion are fit together. A thickness of a border between the first peripheral wall and the ceiling plate and a border between the first peripheral wall and the floor plate is formed to be thinner than a thickness of the second peripheral wall.

Abstract: A magnetic tape cartridge includes a cartridge casing formed by upper and lower casing halves and a single reel around which a magnetic tape is wound and which is contained in the cartridge casing for rotation. A slide door for opening and closing a tape outlet opening is mounted on the cartridge casing to be linearly slidable along a door passage between a closing position where it closes the tape outlet opening and an opening position where it opens the tape outlet opening. A door spring for urging the slide door toward the closing position and holding the same in the closing position is disposed on the door passage.

Abstract: Magnetic-tape cartridge includes a substantially rectangular housing. At least one tape reel is rotatably mounted in the housing. The at least one tape reel is configured to receive wound magnetic tape. A first part is axially movably mounted in a center of the at least one tape reel. A second part is non-rotatably mounted and axially movably mounted to a housing wall of the cartridge via a spring. The first part is movable between a resting position and an operating position in which the first part moves the second part against the biasing force of the spring.

Abstract: 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.

Abstract: A tape drive having a cartridge receiving area for receiving a cartridge containing a recording medium on a supply reel is disclosed. The tape drive has a take-up reel. The take-up reel includes a take-up rotatably mounted to the tape drive and a pair of flanges mounted on either side of the take-up hub. A magnetic read/write head is disposed between the cartridge receiving area and the take-up reel. A pair of fixed guide assemblies is disposed symmetrically about the magnetic read/write head. Each of the fixed guide assemblies has a fixed guide mount fixed to the tape drive, a fixed guide attached to a top of the fixed guide mount, and a spring/pressure pad having at least one pressure pad mounted to the fixed guide, wherein the pressure pad applies pressure to a top edge of the recording medium when the tape drive is operational. The tape drive also has a forward guide roller and a rearward guide roller disposed symmetrically about the magnetic read/write head.

Abstract: 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.

Abstract: A tape reel assembly for a data storage tape cartridge including a hub, and first and second flanges. The hub defines a hub axis and opposing first and second ends from which the flanges extend, respectively. The first flange includes a radially extending main body and an adjustment section. The adjustment section is provided within the main body, defines a tape edge contact surface, and is characterized by an increased flexibility as compared to the main body. The tape edge contact surface is readily deflectable relative to the hub axis. The adjustment section is configured such that a deflection orientation of the tape edge contact surface is a function of pressure on the hub. During use, as pressure on the hub increases (e.g., tape winding pressure), the adjustment section positions the tape edge contact surface to desirably direct the wound tape to a consistent lateral position.

Abstract: A magnetic tape cartridge including a reel-rotation restraining member which restricts rotation of a reel when not used and allows the rotation of the reel when used. The reel-rotation restraining member has a restraining member, an urging member, and an unlocking member. The restraining member has a restraining gear which meshes with a locking tooth portion, and the restraining member is supported by a support portion of the cartridge case.

Abstract: A tape reel in which molding quality of a flange unit is improved so as to improve reliability at the time when a magnetic tape runs at high speed, and a tape cartridge having the same. A plurality of reference planes (152v) formed between a chucking gear (152b) and an outer peripheral rib (152r2) formed at an outer peripheral side of this chucking gear (152b) are provided separately from the outer peripheral rib (152r2). And the reference plane (152v) is formed with edge planes of each of a first rib (152v1) extending toward a circumference and a second rib (152v2) extending toward a direction crossing the first rib (152v1). According to this arrangement, a volume at a portion constituting the reference plane (152v) is made smaller, occurrence of a sink after a resin is hardened is suppressed, and molding quality of the flange unit (152) is improved so that straight runnability of the magnetic tape at high speed running and reliability in recording/reproducing operation are improved.

Abstract: A tape cassette including a cartridge and one tape reel provided in the cartridge, with a recording medium in the form of a tape being wound upon the tape reel. In the tape cassette, a leader tape that is more rigid than the recording medium in the form of a tape is connected to an unwinding end of the recording medium in the form of a tape; a toothed portion (a protrusion) is formed on at least a portion of both side edges of the leader tape; the tape reel has a flange on a top portion and on a bottom portion of a hub, and feed teeth (engaging portions) that engage the protrusions of the leader tape are formed on outer peripheral edges of the flanges. Rotation of the tape reel in one direction causes the engaging portions to feed the protrusions, whereby the leader tape is sent out from the cartridge. The tape cartridge of the invention can be reliably mounted to a recording/reproducing apparatus.

Abstract: A magnetic tape cartridge includes an opening 1C through which a magnetic tape is drawn out, and a slide door 6 that slides along a sidewall 1D provided with the opening 1C to open and close the opening 1C. The opening 1C is provided in part of the sidewall 1D across a lower half 1A and an upper half 1B of the cartridge case 1. At least one of a lower half portion and an upper half portion of the sidewall is provided with a holding groove 1L that receives a front end portion 6A of the slide door 6 when the opening is closed. Therefore, the upper half 1B and the lower half 1A of the magnetic tape cartridge may be smoothly combined.

Abstract: A recording tape cartridge in which it is possible to suppress radial direction movement of a reel by a braking member which impedes rotation of the reel at a time when the recording tape cartridge is not being used, while ensuring strength of a reel hub with respect to pressure of winding of a recording tape therearound. At the recording tape cartridge, the reel, around which a magnetic tape is wound and which is accommodated in a case, is set in a rotation locked state when a braking member, which cannot rotate due to the braking member engaging with a cross-shaped rib, engages with anchor projections. When the braking member moves apart from the anchor projections, a meshed state is cancelled, and the reel can rotate with respect to the case. A reinforcing ring, which is fit together with an inner peripheral surface of the reel hub, reinforces the reel hub whose top end is open.

Abstract: In order to provide a recording tape cartridge which always can be piled up stably while a region for a label can be secured, there is provided a recording tape cartridge comprising a case having a substantially boxed shape and rotatably accommodating a reel around which a recording tape is wound, a recessed portion formed on an upper surface of the case, and a stacking rib protrudingly provided manner on a lower surface of the case, for engaging with the recessed portion when a plurality of the recording tape cartridges is stacked, a protruding portion, which defines a label region, being formed at a position in the recessed portion, which position does not interfere with the stacking rib when the plurality of the recording tape cartridges is stacked.

Abstract: 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.

Abstract: Disclosed herein is a magnetic tape cartridge in which reliability has been enhanced by preventing a thin insertion-guide portion, provided in an opening for guiding a leader pin, from being deformed due to shock produced by dropping, etc. The magnetic tape cartridge has a cartridge case 4 in which a single reel with magnetic tape 6 wound thereon is rotatably housed. In an opening 10 through which a leader member 5 rigidly attached to the leading end of the magnetic tape 6 is pulled in and out, an insertion-guide portion 21 for guiding an end portion of the leader member 5 is formed by making the case wall surface thin, and a cutout is provided on at least one side of the insertion-guide portion 21 at a position of an edge of the opening 10.

Abstract: Disclosed herein is a magnetic tape cartridge including a reel-rotation restraining member which restricts rotation of a reel when not used and allows the rotation of the reel when used. The reel-rotation restraining member has a restraining member, an urging member, and an unlocking member. The restraining member has a restraining gear which meshes with a locking tooth portion, and the restraining member is supported by a support portion of the cartridge case.

Abstract: A recording tape cartridge has a substantially rectangular case. An upper case and a lower case are joined together by peripheral walls thereof abutting each other. A reel, on which a recording tape T is wound, is rotatably accommodated in the case. An opening for pulling-out of an end portion of the recording tape T is formed in the case. A shielding member, which opens and closes the opening, is held slidably in the case. A projection (operation portion), which engages with an engaging mechanism of a drive device, is formed at the shielding member. A slit is formed in a peripheral wall such that the projection is slid in a state of being exposed. A distal end surface of the projection exposed from the slit is formed so as to be substantially flush with the peripheral wall when the shielding member closes the opening.

Abstract: A tape cartridge including a repositionable memory element is provided. The tape cartridge includes a cartridge housing that includes a supply reel having a magnetic tape media spooled thereon and a memory element to communicate with a tape cartridge handling device via a wireless connection. In one embodiment of the invention, the memory element is connected to the cartridge housing using an attachment apparatus that provides a detachable connection with the cartridge housing. The attachment apparatus includes a positioning mechanism for repositioning the memory element following attachment to the tape cartridge housing to align the memory element with a mating transceiver in the tape-handling device to facilitate communication exchange therebetween.

Abstract: A magnetic tape cartridge is constructed by rotatably housing a reel having magnetic tape wound therearound within a cartridge case. The cartridge case is constructed by an upper case and a lower case. The cartridge case has a tape extraction opening in a side wall thereof. The upper case and the lower case are fixed by welding at an abutment surface P, where the upper case and the lower case abut each other. In addition, vertically extending ribs that alternately extend up and down beyond the abutment surface P are provided on the inner surfaces of the side walls of the upper case and the lower case in the vicinity of the opening. By this construction, the strength of the cartridge case in the vicinity of the opening is improved, thereby preventing damage thereto even when the magnetic tape cartridge is dropped or the like.

Abstract: A cartridge has an angled face formed at a rear end side of a case accommodating a recording medium. An operation portion for switching between two modes is provided on the angled surface. The two modes are a mode which enables recording of the recording medium and a mode which disables recording. The angled face comprises an opening. A write-protect portion, which switches the cartridge between the two modes, is provided with the operation portion, which is for switching between the modes, and is disposed near the opening. The operation portion is operated by an operating movement. Resultantly, in a writing-disabled state, an opening/closing plate of the write-protect portion is positioned at the opening, and in a recording-enabled state, the opening/closing plate is moved away from the opening. Thus, a user can judge from the rear end side which of the two modes the cartridge is in.

Abstract: A magnetic tape cartridge of the present invention can restrain uneven winding of a magnetic tape. The magnetic tape can be restrained, and the magnetic tape cartridge of this invention comprises a cartridge case, a reel, housed inside this cartridge case and around which a magnetic tape is wound, and a tape guide, disposed alongside the abovementioned reel guiding the abovementioned magnetic tape so as to separate magnetic tape once from the magnetic tape wound around reel, and guiding the abovementioned separated magnetic tape so that it contacts again the outer peripheral surface of the wound magnetic tape, wherein the magnetic tape that contacts the outer peripheral surface of the wound magnetic tape is restrained in vibration in the tape width direction.

Abstract: In a tape cassette and a tape unit according to the present invention, the tape unit 20 comprises a support 21 including: a rotation support section 21a rotatably supporting a tape spool 53 and facing a roll part T0 of a print tape T; and a junction section 55 extending from the rotation support section. A guide groove 55a for guiding the print tape T pulled out from the roll part T0 is formed on the junction section 55. By virtue of such composition, the tape unit 20 can be attached to a cassette case body 32 of the tape cassette maintaining the print tape T being set in the guide groove 55a, by which the replacement of the tape unit T which is stored in the cassette case body 32 can be made easier.

Abstract: There is provided a magnetic tape, to be used at a running speed of at least 4,000 mm/sec., wherein servo signals for controlling tracking are recorded on the magnetic layer or the backcoat layer, and wherein the difference between the recording track width and the reproducing track width is 16 &mgr;m or less, characterized in that the value of [&agr;/(Tw−Tr)] is 0.2 or less, wherein a [&mgr;m] is an amount of a weave occurring on one of both edges of the magnetic tape and on the side of reference for the running of the tape; Tw [&mgr;m] is a recording track width; and Tr [&mgr;m] is a reproducing track width; and that a coefficient of humidity expansion in the tape widthwise direction is (0 to 14)×10−6/% RH; and a coefficient of thermal expansion in the tape widthwise direction is (0 to 10)×10−6/° C.

Abstract: A magnetic tape cartridge including a reel-rotation restraining member which restricts rotation of a reel when not used and allows the rotation of the reel when used. The reel-rotation restraining member has a restraining member, an urging member, and an unlocking member. The restraining member has a restraining gear which meshes with a locking tooth portion, and the restraining member is supported by a support portion of the cartridge case. In the magnetic tape cartridge, the following relationship is met: b≦(2×a×c)/d where “a” represents the length of engagement between the restraining member in an unlocked state and the support portion, “b” represents the clearance between the restraining member and the support portion, “c” represents the space between the tooth of the restraining gear and the locking tooth portion, and “d” represents the outside diameter of the restraining gear.

Abstract: A recording tape cartridge which can prevent positional offset of a case with respect to a cartridge accommodating device. Accompanying operation of loading the cartridge in an arrow A direction into a drive device, a door is moved to a side of opening an opening while an operation projection is engaged by an engagement projection. At this time, a pushing/engaging member of the drive device enters into a cell retention notch, and pushes a push surface and engages with an engagement surface. In this way, at the case, a moment in an arrow E direction around a region of engagement is offset, and the case is prevented from being coming out from the drive device. An inclined surface permits advance and withdrawal of the pushing/engaging member into and from the notch.

Abstract: A recording tape cartridge is provided with a substantially rectangular case, which includes an upper case and a lower case rotatably housing a single reel wound with a recording tape T, and a non-contact memory M, in which is stored various information such as recording capacity and which is disposed at a predetermined angle of inclination inside the case. A pair of screw bosses is formed near both corner portions at a rear side in a direction in which the case is loaded into a drive device, and screws for joining the upper case and the lower case are passed through the screw bosses. The memory M is disposed so that at least part of the memory M is positioned on a virtual straight line T joining the respective screw bosses when seen in plan view. Positional precision of the memory inside the case is improved.

Abstract: An expandable tape cartridge has a housing with a top and a bottom that are movable relative to each other between a minimum spacing and a maximum spacing. A tape reel with magnetic recording tape wound thereon is rotatably mounted in the housing for rotation around an axis proceeding substantially perpendicularly between the top and the bottom of the housing. The tape reel has insufficient clearance for free rotation within the housing when the spacing between the top and the bottom is at the minimum, and is freely rotatable when the spacing is at the maximum. This allows the width of the recording tape measured in a direction parallel to the rotational axis, to be increased, thereby increasing the storage area available on the recording tape without increasing the linear length of the recording tape.

Abstract: The features for locking and driving a tape reel in a single reel tape cartridge eliminate the dependence on friction for the mating (coupling) between the driving features and prevent the disengagement of the tape reel from a drive chuck due to high rotational forces. The geometry can be in the form of a post and hole arrangement or meshing teeth such that the rotational force is transmitted between the two bodies through mating surfaces that are perpendicular to the vector of the rotational force. This geometry still allows vertical motion of the bodies with respect to each other (i.e. they can be disengaged when desired) but the rotational force cannot translate into movement of one body with respect to the other body. The same geometry can be used to prevent the reel form being rotated when not in the tape drive.