CN1010998B - Disc drive compatible tape cartridge - Google PatentsDisc drive compatible tape cartridge
- Publication number
- CN1010998B CN1010998B CN 86103068 CN86103068A CN1010998B CN 1010998 B CN1010998 B CN 1010998B CN 86103068 CN86103068 CN 86103068 CN 86103068 A CN86103068 A CN 86103068A CN 1010998 B CN1010998 B CN 1010998B
- Prior art keywords
- magnetic tape
- tape cassette
- cassette equipment
- disc driver
- Prior art date
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Generally speaking the present invention relates to data storage media, refer more particularly to the read/write head that utilizes disc driver carries out read/write on tape data tape equipment.The tape storage medium is widely used in storing mass data, and these data do not need to carry out quick access with computing machine.Tape-shaped medium's often is applied to database stores, and is used for the duplicate copy of stored data, with the raw data of storing in the protection computer because carelessness and deleted or destroy.This a kind of function in back is called " reserve " storage.
Generally speaking, for stored data on tape, require a kind of equipment that is specifically designed at the tape identifying recording layer.Obtain a kind of so online reserve or be rational in the mass data disposal system based on the required extras of tape storage device of the memory of disk, but for mini system, extras is with respect to total system, and shared number percent is sizable.Under the situation of personal computer, the expensive of tape storing apparatus almost equates with the expense of personal computer.Therefore, the flexible plastic disc of personal computer user utilization cheapness is made reserve storage and interchangeable data-storing.Can realize the reserve storage by the method that raw data is copied on the floppy disk.Its capacity is that 20 to 80 times hard disk of floppy disk capacity is just used by personal computer user now more and more.Because data are very time-consuming on from a disk copy to one group of floppy disk, thereby to have a high capacity, interchangeable data-storing and the tape storing apparatus more cheap with respect to personal computer be very helpful.This device can be used for the reserve of online storage, the distribution of software or database, or as the low access mode of the cheap online memory of expense.
Therefore, the purpose of this invention is to provide a kind of read/write head that utilizes disc driver and come the data tape device reading or write to tape from tape.
This tape storing apparatus utilizes the read/write head of disc driver that tape is read and/or write to data from tape to get on.This tape storing apparatus is called magnetic tape cassette equipment here, comprises a tape-shaped medium's that is used for data-storing; Mechanical hook-up with respect to position L recording tape, data are write tape by the read/write head of disc driver at unit L place, or read from tape; A mechanical hook-up that is used to store tape-shaped medium's; And mechanical hook-up of carrying tape through read/write head.Certain part that is nominally the magnetic tape cassette equipment of part A in Fig. 2-4 has an exterior contour, and its shape and big I make this part insert disc driver, and make tape can place read/write head near.For most of disc drivers, the shape of part A is similar to disk.
Tape-shaped medium's can be any medium compatible mutually with the read/write configuration of disc driver, and magnetic tape cassette equipment is applied to this disc driver.Modern floppy disk requires the magnetic property of tape to be suitable for the magnetic read/write head operation of disc driver.These tapes can comprise that a bottom is to increase wearing quality.Reduce friction, and/or reduce static electric charge.For the disc driver of using other recording materials configurations (for example magnetic-light medium or CD), its tape should comprise certain compatible recording materials.
Mechanical hook-up according to the read/write head recording tape of disc driver is made up of two parts: one of them is the mechanical hook-up that is used to guide tape and/or changes the tape direct of travel; Another then is according to the harmonize mechanical hook-up of above-mentioned guiding mechanical hook-up of some the correct reference frames in the disc driver.This adjustment mechanical hook-up is guaranteed tape exactly according to read/write head location, and advances along correct path near by read/write head the time.
Storage can in all sorts of ways on the tape-shaped medium's; Comprising: can alternately reel or two spools of the whole tape length that unrolls; An infinite loop structure is used on one or a series of spool, the storage tape; Tape (but infinite loop or reverse its length) case, or a simple continuous tape volume.
Do not comprise the embodiment of the infinite loop of tape for those, read/write operation or all to a direction, or alternately turn to according to the ability of disk drive head.When magnetic tape cassette equipment when the disc driver of the both direction of advancing along tape transmission data uses, half of record tape track be along a direction record, second half is along the other direction record, thereby the tape that need not unroll during continuous data transfer on the record tape track.When disc driver can only be along direction transmission data, tape was unrolled at each record tape track afterbody; Read/write head is moved to the tape throughput direction from the side, with head position the next one read or the record tape track that writes down on, continue data transmission and processing then.
The mechanical hook-up of existing many well-known transmission tapes.These mechanical hook-ups comprise a motor, one directly with the driving element of contact with tape, and the connector of this element of connection and motor.Suitable driving element comprises a take-up spool that is used for wound tape, a capstan, capstan/pressure wheel combination, or a connection leader tape.Motor can be in magnetic tape cassette inside, also can be externally.In certain embodiments, the disc driver spindle motor is used for tape is moved past read/write head.
Selecting the major limitation of connector is its size.Especially when the disc driver spindle motor was used to mobile tape, because the magnetic tape cassette equipment part will be inserted into disc driver, thereby the disc driver strictness had limited its size.When tape moved past read/write head, because the power supply of disc driver spindle motor commonly used is very low, and owing to need the disturbance of tape speed and location, edge is reduced to minimum, connector should be effective and stable when transmission power.Selected connector comprises various types of leader tapes, gear, worm gear, friction pulley, eccentric wheel be connected combination, flexible cable, rigid shaft, or the combination of some said apparatus or other device.When motor only by the rotation of direction, and the storage tape-shaped medium's is when using two spools, connector also can comprise a shaft coupling mechanical hook-up, is used to make tape to move in opposite direction.
Require tape for the magnetic tape cassette equipment that transmits in the other direction for those, the order of reverse directions can be passed through the disc driver axle, magnetic-head actuator, or the magnetic head loading motor sends magnetic tape cassette equipment to.Because magnetic tape cassette equipment can comprise a battery, or is electrically connected on disc driver or other power supply, so the embodiment of transmission and hitch bar can have electric device and mechanical organ.Equally, moving of tape can be by realizing that as the motor of a magnetic tape cassette equipment part being connected by battery or external electric provides power supply.The disc driver that designs for suitable magnetic tape cassette equipment can comprise plug, so that power supply and/or control information are delivered to magnetic tape cassette equipment.
Tape and magnetic disk drive apparatus have some backfeed loops usually, to regulate the variation of medium velocity.This feedback can be regulated the speed of medium or the speed-feedback of read and write only needs the ratio between medium velocity and the read/write speed is remained on a constant value.For example, in many disc drivers, Disk Drive Controller is regulated read rate according to the transmission on the disk.This Disk Drive Controller will be regulated read rate according to the transmission on the tape in the magnetic tape cassette equipment equally.The variation of speed is to get final product within the respective limits of the read/write speed backfeed loop of Disk Drive Controller really when therefore, only needing to determine tape by read/write head.For helping to guarantee this requirement, select the parameter of tape-shaped medium's, the tape guidance system can be simulated the parameter of relevant disk exactly with the tape induction system.
The feature that is stored in the data on the tape is by certain device decision, and magnetic head of disc drive utilizes this device stored data on disk.If read/write head is with position series form stored data, then the data on the tape are also with this form storage.Between the device of data-storing on the device of data-storing on the disk and the tape in magnetic tape cassette equipment, will there be similar compatibility, and with the data-storing of this device Yi And line mode be that it doesn't matter by signal amplitude modulation or signal frequency modulation, disk drive system is used for any data coding scheme (for example, being used for sometimes digital data coding to disk up-conversion modulation (MFM) digital coding) of stored data on disk and will finishes with the data on the tape that is stored in magnetic tape cassette equipment equally.
Data format descriptor the data on disk or the magnetic tape cassette equipment how to organize, it comprises such as the data track number, the hop count of per pass, every section byte number, paragraph header information, and the parameter that adds code one class that is used for error-detecting.These parameters are to be set up by the controller of disc driver.Employed other parameter of the data layout of tape and Disk Drive Controller, for example interleaving access factor does not need to be equal to the data layout of disk.Main difference is that magnetic tape cassette equipment will need more section and/or longer section to each data track, the capacity of the tape-shaped medium's that has increased with utilization.Therefore, when using magnetic tape cassette equipment to realize data-storing, the device of these parameters must utilize the capacity of the magnetic tape cassette equipment that has increased in the Iterim Change Disk Drive Controller.The software control of these changes or the operating system by main frame, or comprise that by changing one these parameter control device read-only memorys (ROM) finish.Carry out the selection of optimum device and these special parameters of this work, comply with specific controller, operating system and disc driver itself and deciding.
Fig. 1 is the backplan of a standard 3.5 English inch microfloppy disk magnetic tape cassette.This is the general medium that is used at 3.5 English inch microfloppy disk drive stored datas.
Fig. 2 is a vertical view (shown in the A part) of removing the shell of magnetic tape cassette equipment part, and this magnetic tape cassette equipment is assemblied in one 3.5 English inch microfloppy disk drive, and comprises a device according to the magnetic head of disc drive recording tape.
Fig. 3 is the side cross-sectional view of embodiment shown in Fig. 2.
Fig. 4 is a backplan embodiment illustrated in fig. 2.
Fig. 5 is a vertical view (shown in the B part) of removing the embodiment shell of magnetic tape cassette equipment part, is used for carrying and the storage tape-shaped medium's at magnetic tape cassette equipment.This embodiment has utilized one section tape, and this tape has two tail ends.
Fig. 6 is the detail drawing of a thread slider.This is a part embodiment illustrated in fig. 5.
Fig. 7 a-c is depicted as the motion of toggle clutch coupling embodiment among Fig. 5.When one in the spool tail end place at tape was not reeled, this clutch coupling just was activated.
Fig. 8 is a vertical view (shown in the C part) of removing the embodiment shell of magnetic tape cassette equipment part, is used for carrying and the storage tape-shaped medium's at magnetic tape cassette equipment.This embodiment has utilized the infinite loop of tape.
Fig. 9 is the detail drawing that is wound on the tape on the twisted magnetic tape guide.This is a part embodiment illustrated in fig. 8.
Several possible embodiment of magnetic tape cassette equipment was verified, and wherein two will be discussed below.These two embodiment will use with a standard 3.5 English inch microfloppy disk drives.Embodiment with identity function part may utilize the disc driver of other model to realize.Main difference place between two kinds of embodiment is that the former comprises one section tape with two tail ends, and the latter utilizes the infinite loop of tape.These instruments have influence on tape and how to be driven in all cases and to store., how they go on record according to disc driver to employed actual tape-shaped medium's and it and almost have no effect.Therefore, the discussion for tape-shaped medium's and its record all is the same for transmission/storage embodiment.
The magnetic tape cassette equipment part that is called part A shown in Fig. 2-4, it can be according to the magnetic head of disc drive recording tape, and is inserted into disc driver to reach the purpose of visit magnetic head.Be used to store and carry the part of the magnetic tape cassette equipment of tape to can be described as conveying/storage part.B part among Fig. 5, it is the conveying/storage part among the magnetic tape cassette equipment embodiment, it has used the reverse length of tape.The C part of Fig. 8 is a conveying/storage part among the embodiment that uses the infinite loop tape.Therefore, first magnetic tape cassette equipment embodiment comprises A and B two parts, and second embodiment comprises A and C two parts.
In the following discussion, identical reference symbol will be used to represent the same parts among each figure.First bit digital of each reference symbol is referenced expression in first figure at parts place.Here, introduce some definition for following discussion." disk drive head " is a mechanical hook-up, is used for reading and/or write data on relevant data carrier.Tape has one " length " usually, and " width " and " thickness ", its length (common several feet) is far longer than its width, and its width (about 3/4 English inch) is far longer than its thickness (about 0.0005 English inch).Therefore, tape can be looked at as along the two-dimensional surface of its length and Width expansion." conveying " tape is promptly represented to transmit along its length direction.Provide on tape a bit, anticipate promptly in this on " plane of tape ", and this plane is tangential on this two-dimensional surface." tape guidance device " is any element of revising " plane of tape " or revised the marginal position of tape when tape passing this guide piece.If the plane of tape guidance device correction tape, thus magnetic tape path is reversed along the tape guidance device, and then this tape guidance device is called " twisted magnetic tape guide ".
The wide 0.75 English inch of used tape-shaped medium's.But this just allows 80 magnetic tracks of a disk drive head access, and this is the employed maximum numbers of standard 3.5 English inch disc drivers.Coercive force that the magnetic overlayer of tape has and thickness can support disk drive head to change with the magnetic variation that its normal data speed writes, and its data speed is the tape transmission speed just.If carry being used for tape, storage, or the helpful words (for example, reduce friction, increase wearing quality and/or reduce static charge) of the device of record can be used bottom covering.If on himself, then its bottom covering must be non magnetic to disk by storage ring, to avoid duplicating.Because the variation in its magnetic head/medium system, along with 3.5 English inch disc drivers further increase linear density, the also available similarity method of tape-shaped medium's is transformed to magnetic disk media.This will allow tape-shaped medium's to guarantee that the increase that is equal to is arranged on linear density, and it will make the capacity of magnetic tape cassette equipment and/or performance increase.
Fig. 1 is the backplan of a standard 3.5 English inch microfloppy disk magnetic tape cassette.Broken circle is represented the magnetic disk media in the magnetic tape cassette.Dash area is a self-acting valve.This is an over cap, the automatic landing of over cap when the disk magnetic tape cassette is inserted into disc driver, so the aperture of aperture in the self-acting valve and magnetic tape cassette is complementary, to allow disk drive head accessing disk medium.Valve is represented with open position.Half filling rectangle in the upper right corner of magnetic tape cassette among Fig. 1 is a write-protect switch.The position of this switch is read by the sensor in the disc driver, and allows write-protected disk magnetic tape cassette of disc driver identification.
Fig. 2-4 has represented the A part of magnetic tape cassette equipment.Because A prepares to be assemblied in the 3.5 English inch microfloppy disk drives, so its size must be suitable for size (90 mm wides of 3.5 English inch microfloppy disk magnetic tape cassette, 94 millimeters long, 3.3 millimeters thick), so that with correctly pack into the loader device of disc driver of magnetic tape cassette.In the ordinary course of things, require this part one disc-shaped profile to be arranged to be suitable for cooperating oblong openings by general disc driver front.Tape-shaped medium's 20 is from tape transfer position 21 input A parts.Tape 21 is transported to twisted magnetic tape guide 22 from the position, by position L, at the L place, tape get on (along dotted line 25) is read or write to disk drive head with data from tape, tape transfer is to twisted magnetic tape guide 23 then, and partly is transported to tape from A and batches position 24.Usually, read and write is carried out at position L place, and in some disc driver, for example in the CD drive, position L is not adjacent with read/write head.
In some embodiment to the Bound Tape measured length, for example partly to describe at B, tape is transferred to from transfer position 21 and batches position 24.Then, carry and batch transposition.Tape is oppositely carried, with the tape that unrolls.In case tape has been unrolled, carry and batch the original position that promptly turns back to them, and repeat said process.The device of this conversion will outline it in the discussion of B part.
Twisted magnetic tape guide 22 becomes miter angle with 23 with the direction of tape conveying.On each twisted magnetic tape guide, tape is wound on the guide piece with about 180 degree angle curls, and it makes the tape transport path change 90 degree and normal bit is spent on rotation tape plane 180.The method of this tape guidance remains on tape in the disc-shaped zone in the A part, and the size in this zone and shape make A partly be suitable for the oblong openings of many generic diskette drivers front.These guide pieces make tape can send the A part to, impel the correct access to position L, and angelica is in the dish that is partly limited by A the time, by the A section port.After this manner, tape, is located as its online 25 places by magnetic head of disc drive with the method for operation similar to magnetic disk media.
Several other tape guidance devices 26 provide one with reference to the limit, and its effect is a recording tape, and/or provides one around the angle, to change the plane of tape.These tape guidance devices 26 are positioned at several position: between tape transfer position 21 and twisted magnetic tape guide 22; Between twisted magnetic tape guide 22 and 23; And batch between the position 24 at twisted magnetic tape guide 23 and tape.For example, under tape guidance device 26 provides with reference to the situation of limit with recording tape, on tape, exert pressure, make an one limit tightly push down tape guidance device 26 with reference to the limit.On tape, apply the predetermined alignment error that this pressure can lean on twisted magnetic tape guide 22 and 23, by twisted magnetic tape guide 22,23, and/or the shape of tape guidance device 26, and/or finish with reference to limit upper spring face by acting on the non-of tape.All tape guidance devices and all use the manufacturing of non magnetic material material, for example non-magnetic stainless steel or stupalith with the driver element of contact with tape.
In the embodiment shown, carry the power of tape from the disc driver spindle motor, to obtain.As shown in Figure 4, what close A part was central is a cylindrical receptacle 27, and it is included in the circular hole 43 of jack central authorities and second hole 44 of departing from jack central authorities.When magnetic tape cassette equipment was loaded into 3.5 English inch disc drivers, hole 43 was located on the circular shaft of disc driver spindle motor.When the disc driver spindle motor rotated, a spring pin extended into hole 44 from the motor jack assembly.In this way, the power that obtains from the disc driver spindle motor is transferred to the jack 27 the magnetic tape cassette equipment.Magnetic tape cassette equipment is enclosed a containment vessel 29.Hole 42 in the lower surface of containment vessel 29 allows the spindle motor plugging hole component to enter jack 27.Upper surface and the opening in the lower surface 212 at shell 29 make that disk drive head can 25 access tapes along the line.These openings 212 are by slide plate 40 protections, and this slide plate comprises the opening 41 in its upper surface and the lower surface.During using magnetic tape cassette equipment, slide plate 40 is positioned, so that the position of opening 41 is adjacent to opening 212.The profile of this slide plate and function are equal to " self-acting valve " on the 3.5 English inch microfloppy disk magnetic tape cassette substantially, and the motion of slide plate 40 is to realize in the mode identical with self-acting valve.Write-protect switch 45 is with the method operation of the write-protect switch that is similar to the disk magnetic tape cassette, and sensor same and in the disc driver matches the state of this this switch of sensor determination.Containment vessel also comprises a ball bearing 28, and its inside race is with jack 27 rotation, and its outer race is maintained fixed, thus with jack 27 rotatablely move and the stationary part of magnetic tape cassette equipment is isolated.
For guaranteeing that read/write head notes tape exactly, importantly magnetic tape cassette equipment is repeatedly adjusted by some reference frame in the disc driver.Usually, the record of tape requires tape to have tape location and correct tape throughput direction accurately by position L the time.Reach this purpose, one group of guide finger just should be arranged in magnetic tape cassette equipment,, also some structures will be arranged, make magnetic tape cassette equipment cooperate (especially with position L) exactly with disc driver in magnetic tape cassette equipment, to be tape guidance exactly.The hole of a pair of prolongation path by containment vessel arranged at the containment vessel bottom at the used microfloppy disk magnetic tape cassette of 3.5 English inch microfloppy disk drives.When the microfloppy disk magnetic tape cassette was loaded into disc driver, a pair of pin was loaded onto in these holes, with the perpendicular positioning of disk magnetic tape cassette in the part control disc driver.For reaching the purpose of coupling magnetic tape cassette equipment, these pins must be suitable for the vertical and translation reference point in the disc driver.Therefore, magnetic tape cassette equipment comprises a pair of hole 210 and 211 that is positioned at containment vessel 29 bottom surfaces, is used to install a pair of register pin in magnetic disk drive apparatus.
Slot 211 provides a gap closely, with the relevant pin of assembling in disc driver.Hole 211 tilts and vertical benchmark for magnetic tape cassette equipment provides with 43.Hole 210 provides a loosening gap, and with the relevant pin of assembling in disc driver, magnetic tape cassette equipment provides vertical benchmark.By the close clearance that the garden shape transmission shaft that makes hole 43 and disc driver spindle motor matches, determined the remaining sum of translation location.Near two other pin that is arranged in the magnetic tape cassette opening of disc driver disc driver also provides vertical support for microfloppy disk magnetic tape cassette or magnetic tape cassette equipment.
Because magnetic tape cassette equipment repeats to adjust by disc driver by hole 43,210 and 211, tape guidance device 22,23 and 26 must be located exactly by these register holes.Must add up with tolerance on fit the deflection cause of bearing 28 is described, accurately adjust according to disk drive head to determine tape 20.
In above illustrated embodiment, the disc driver spindle motor is used as the power source of carrying tape.Jack 27 comprises that a skin pulley is to drive leader tape 213.Leader tape 213 is used for power is sent to the magnetic tape drive element from jack 27 in B part or C part.If being short of power of disc driver spindle motor, or be unsuitable for driving tape, these two embodiment can make and use the same method, and promptly use a motor special in the magnetic tape cassette equipment, or some other suitable power supply drives tape.
Conveying shown in the B part among Fig. 5/storage part has adopted a pair of conveying/take-up reel 51 and 52.One end of tape-shaped medium's 20 is fixed on the spool 51, and the other end is fixed on 52.Tape-shaped medium's is alternately from carrying spool to pass through the A part around on take-up reel.In Fig. 5, tape outgoing position 21 is on spool 51, and spool 52 is driven as tape and batches position 24 simultaneously.This is the direction that tape is advanced, that is reads or writes the direction of data.Current, standard 3.5 English inch disk drive head have only when medium and carry out data transmission along the direction Shi Caineng that advances.Thereby other direction that tape is advanced is as unrolling.If further improve magnetic head design, to allow bidirectional data transfers, then the tape both direction of advancing all will be accepted data transmission.
In the present embodiment, obtain power by leader tape 213 from the disc driver spindle motor.Because only by a direction rotation, so must make the tape negative line feed by the toggle clutch coupling that is positioned on the spool driving shaft 50, wherein, the magnetic tape core 51 on axle 50 and 52 can rotate freely spindle motor.The slip skin pulley that is driven by leader tape 213 is by means of tooth 60 be meshed with the tooth of threaded block 54 or 55 (having more detailed diagram) in Fig. 6.Each thread slider is rotated and is installed on the axle 50, and is connected on relevant spool 51 or 52 by volute spring 63.By this installation, power is transferred on the current take-up reel from disk drive motor.
Figure 6 shows that the detail drawing of thread slider 54 or 55.Each thread slider has a tubular shaft, can rotate its spool 51 separately or 52 extension 64.A pair of pin 61 is rigidly connected with extension 64, and passes the screw thread 62 in the slide block.When tape from carrying spool fully around to the greatest extent the time because the both ends of tape are fixed on take-up reel and carry on the spool, thus avoided the further conveying of tape, thereby take-up reel is no longer rotated.When driven slip skin pulley remains in operation, be forced to around axle 50 rotations with the thread slider of its engagement.Because axle 50 is that rigidity is installed on the shell 211, so when thread slider rotates, spools 50 are extracted axle itself and slip skin pulley by the groove 62 that is fixed on the pin 61 from take-up reel.The angle of tooth is steeper than the angle of screw thread, does not at first break away from the spiral transmission of pin/screw thread combination to guarantee teeth.When the sliding bell wheel was pushed over middle body, device 56 was activated in crossing.Device 56 was pushed up by 57 bullets of spring during this was crossed, and was coupled on the sliding bell wheel by roller 58.Device is pushed the sliding bell wheel to another spool in crossing, then with new take-up reel and thread slider engagement.Fig. 7 a-c has showed this process.This move has discharged original thread slider, returns to original take-up reel by helical return spring 63 then, and an end of spring 63 is fixed on the pin 61, and the other end links to each other with flange 65, and flange 65 is parts of thread slider 54 or 55.When tape arrived end points, promptly repetitive reverse was carried the tape process at every turn.
Conveying/storage embodiment partly shows at the C of Fig. 8.Tape-shaped medium's 20 enters the C part from the position 24 of A part.Tape reverses to carry out half around the method for reversing guide piece 80.When entering guide piece, the orientation of tape changes to its edge from the direction with A part coplane, and when guide piece exported, tape almost was along lateral travel.Annular arrow among Fig. 8 has represented that this direction changes.Reverse guide piece 81 and 80 and be equal to, but 81 is the inverse change that are used for carrying out tape.Fig. 9 is the detail drawing of these guide pieces.After reversing guide piece 80 outlets, tape is transported to the outside of magnetic tape core on its edge, and tape is limited by the periphery of roller 82-85.When tape was carried, its is rotation continuously inwardly, fully was wound on the roller 84 up to the inner face of tape, and arrived till the centre of spool.
Present embodiment has been showed a capstan 86, and it obtains power by leader tape 213 from the disc driver spindle motor, and leader tape 213 is wound on the skin pulley of capstan.Unloaded pinch roll 87 is supported by carrying roller arm 88.The carrying roller arm serves as the axle rotation with pin 89, so that by spring 810 the pinch roll bullet is pushed up on the capstan.Provide friction-driven in this way, to carry tape.Tape reverses on the guide piece 81 from being wound up into here, when tape during from the C section port, will redirect with the tape of A part coplane.
In all infinite loop embodiment, tape is only advanced along a direction, thereby does not need reverse clutch.This design has higher time benefit certainly concerning 3.5 English inch microfloppy disk drives of present use, this is the time of the tape because it does not need to unroll., reverse, and owing to reverse relevant friction, thereby need Billy with more powerful motor among the embodiment of reverse tape length with guiding is this owing to require to add tape.Other infinite loop embodiment is at driver element, and there is difference in the relevant position aspect between the geometry of spool socket driver and tape twist operation.But all these embodiment are made up of the element of identical function basically.
Priority Applications (1)
|Application Number||Priority Date||Filing Date||Title|
|CN 86103068 CN1010998B (en)||1986-05-03||1986-05-03||Disc drive compatible tape cartridge|
Applications Claiming Priority (1)
|Application Number||Priority Date||Filing Date||Title|
|CN 86103068 CN1010998B (en)||1986-05-03||1986-05-03||Disc drive compatible tape cartridge|
|Publication Number||Publication Date|
|CN86103068A CN86103068A (en)||1987-11-11|
|CN1010998B true CN1010998B (en)||1990-12-26|
Family Applications (1)
|Application Number||Title||Priority Date||Filing Date|
|CN 86103068 CN1010998B (en)||1986-05-03||1986-05-03||Disc drive compatible tape cartridge|
Country Status (1)
|CN (1)||CN1010998B (en)|
Families Citing this family (1)
|Publication number||Priority date||Publication date||Assignee||Title|
|WO2015071242A1 (en)||2013-11-12||2015-05-21||Koninklijke Philips N.V.||Coffee grinder and coffee grinding method|
- 1986-05-03 CN CN 86103068 patent/CN1010998B/en not_active IP Right Cessation
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