DK164977B - RAIL TRANSPORT MECHANISM FOR A VIDEO RECORDER - Google Patents
RAIL TRANSPORT MECHANISM FOR A VIDEO RECORDER Download PDFInfo
- Publication number
- DK164977B DK164977B DK415384A DK415384A DK164977B DK 164977 B DK164977 B DK 164977B DK 415384 A DK415384 A DK 415384A DK 415384 A DK415384 A DK 415384A DK 164977 B DK164977 B DK 164977B
- Authority
- DK
- Denmark
- Prior art keywords
- belt
- guide
- pins
- drum
- tape
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/60—Guiding record carrier
- G11B15/61—Guiding record carrier on drum, e.g. drum containing rotating heads
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/52—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with simultaneous movement of head and record carrier, e.g. rotation of head
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/78—Television signal recording using magnetic recording
- H04N5/782—Television signal recording using magnetic recording on tape
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
Description
DK 164977BDK 164977B
iin
Den foreliggende opfindelse angår en magnetbåndføringsmekanisme i henhold til krav l's indledning og således som den kendes fra DE-OS 3.127.592.The present invention relates to a magnetic tape guiding mechanism according to the preamble of claim 1 and as known from DE-OS 3,127,592.
5 Tidligere videomagnetbåndmaskiner i henhold til "Helical-Scan"-systemet benytter til båndføring i området omkring hovedtromlen en stationær cylindrisk del, som rummer båndføringen i form af et skruelinieformet trin. Hovedet eller hovederne er anbragt i en ringspalte mellem den faststående og den derover anbragte drevne 10 tromlede! og fastgjort til sidstnævnte. En hoved- eller drejetromle i et stykke er beskrevet i en samtidigt indleveret patentansøgning.5 Former video magnetic tape machines according to the "Helical-Scan" system utilize a stationary cylindrical portion for tape guidance in the area of the main drum which accommodates the tape guidance in the form of a helical step. The head (s) is arranged in a annular gap between the fixed and the driven drum (10) placed above it! and attached to the latter. A one-piece head or swivel drum is disclosed in a simultaneously filed patent application.
DE-PS 2.656.026 viser en båndføringsmekanisme, hvor der benyttes en omstyringsvalse, medens der i den foreliggende ansøgning benyttes en 15 omstyringsstift. Fra DE-OS 3.127.592 er det imidlertid allerede kendt at frembringe den ønskede sløjfe rundt om hovedtromlen ved, at der foran og efter hovedtromlen er benyttet henholdsvis en førings-og en omstyringsstift, som kan svinges til denne stilling før i ndel 1 er afspilningen. På denne måde kan båndet bevæge sig fra kasset-20 ten og til sløjfestillingen.DE-PS 2,656,026 discloses a tape guiding mechanism using a steering roller, while in the present application a steering pin is used. However, from DE-OS 3.127.592 it is already known to produce the desired loop around the main drum by using a guide and a steering pin, respectively, which can be swung to this position before in part 1, before and after the main drum. . In this way, the belt can move from the cassette to the loop setting.
Fra fig. 1 og beskrivelsen i DE-OS 2.458.432 er det desuden kendt, at båndet med sin underkant løber langs en skulder eller planformet kant 19 som føring ("lineal"). Dermed bliver sløjfevinklen fastlagt 25 og således hældningen af skråsporene på indspilningsbåndet. I fig.From FIG. 1 and the description in DE-OS 2,458,432, it is further known that the belt with its lower edge runs along a shoulder or planar edge 19 as guide ("ruler"). Thus, the loop angle is determined 25 and thus the inclination of the inclined grooves on the recording tape. In FIG.
3,4,8 og 9 og i beskrivelsen af disse i DE-AS 2.904.983 er der på drevne og i forhold til hinanden bevægelige arme vist en båndstrækkemekanisme med indbyrdes faste omstyrings- og føringsstifter.3,4,8 and 9, and in the description thereof in DE-AS 2,904,983, on driven and relative to each other arms, a belt tensioning mechanism with mutually fixed steering and guide pins is shown.
30 Fra Grundig Teknische Information 1980, nr. 2, specielt side 116 og følgende, er det ved afspilning kendt at udføre et sporingssystem DTF til nøjagtig sporing ved hjælp af en kontrol kreds, således at der allerede ved optagelse behandles fire samtidigt registrerede hjælpefrekvenser med hensyn til deres spormæssige krydstale for at 35 danne kontrol signal er for videohovederne. Denne sporingsmetode har vist sig vellykket. Den har imidlertid den ulempe, at den forudsætter bevægeligt monterede hoveder på hovedtromlen, og at det respektive vindue i hovedtromlen for det indragende hoved ikke kan omslutte dette tæt. Det er derfor nødvendigt at overføre høje 230 From Grundig Teknische Information 1980, no. 2, especially pages 116 et seq., It is known during playback to perform a DTF tracking system for accurate tracking by means of a control circuit, so that when recording, four simultaneously recorded auxiliary frequencies are processed with respect to to their trace cross talk to form the control signal is for the video heads. This tracking method has proven successful. However, it has the disadvantage that it assumes movably mounted heads on the main drum and that the respective window in the main drum for the retracting head cannot enclose this tightly. It is therefore necessary to transfer high 2
DK 164977 BDK 164977 B
styrespændinger til den roterende hovedtromle over slæberinge.control voltages for the rotating main drum over the drag rings.
Formålet med den foreliggende opfindelse er at udvikle en magnetbåndføringsmekanisme, som bevirker en mekanisk afkobling af magnet-5 båndsgrenene foran og bag hovedtromlen, således at små unøjagtigheder i båndføringen udenfor detektorenheden ikke indvirker på spor-nøjagtigheden. Endvidere skal der med enkle midler tilvejebringes en sporingsstyring, som også kan fungere ved såkaldt trickafspilning.The object of the present invention is to develop a magnetic tape guiding mechanism which causes a mechanical decoupling of the magnetic strip branches in front of and behind the main drum so that small inaccuracies in the tape guidance outside the detector unit do not affect the track accuracy. Furthermore, with simple means a tracking control must be provided, which can also function in so-called trick play.
10 Disse formål bliver ved en mekanisme i henhold til krav l's indledning opnået ved hjælp af opfindelsen med de i krav l's kendetegnende del angivne foranstaltninger.These objects are achieved by a mechanism according to the preamble of claim 1 by means of the invention with the measures specified in the characterizing part of claim 1.
Yderligere træk og udførelser fremgår af de øvrige patentkrav samt 15 af den efterfølgende beskrivelse af et udførelseseksempel.Further features and embodiments appear from the other claims and from the following description of an exemplary embodiment.
Udførelsen af mekanismen ifølge opfindelsen sørger for, at to omstyringsstifter er bevægelige på en sådan måde, at båndet føres med en mindst 180° sløjfe rundt om drejetromlen og selv er udført 20 som pendul stifter. Deres vippe- eller pendulakse er anbragt lige nedenfor båndmidten og giver en bevægelighed på tværs af båndbevægelsesretningen. Mellem disse omstyringsstifter og henholdsvis begyndelsen og slutningen på drejetromlesløjfen er der anbragt respektive fast placerede føringsstifter forsynet med en flange, på 25 hvis underkant båndet bæres. Som tredie føringspunkt, nemlig for båndunderkanten, benyttes en båndføring, som er stationært fastgjort ved omtrent den halve sløjfevinkel nær den nederste drejetromlerand, har en afrundet overflade og rager ind i et spor på drejetromlen. Føringsstifterne er alternativt udført indstillelige i højden og 30 tillader således en ændring af stigningsvinklen om tromlen og dermed en fordelagtig støjfri gengivelse uden krydstale og henholdsvis også såkaldt søgning eller trickafspilning. Fordelagtigt afkobl es magnetbåndsgrenene mekanisk foran og bag drejetromlen. Derved er det muligt at indskrænke nøjagtighedskravene for hele drivværket til en 35 kompakt enhed. Det er endvidere fordelagtigt, at små unøjagtigheder i båndføringen udenfor detektorenheden ikke virker på sporings-eller detekteringsnøjagtigheden.The embodiment of the mechanism according to the invention ensures that two control pins are movable in such a way that the belt is guided with a minimum 180 ° loop around the rotary drum and is itself designed as pendulum pins. Their rocker or pendulum axis is positioned just below the belt center and provides movement across the belt movement direction. Between these steering pins and the beginning and end of the rotary drum loop, respectively, are fixed fixed guide pins provided with a flange, of which 25 the lower edge of the belt is worn. As the third guide point, namely for the belt bottom, is used a belt guide which is stationary fixed at about half the loop angle near the bottom swivel drum, has a rounded surface and projects into a groove on the swivel drum. The guide pins are alternatively made adjustable in height and thus allow a change of the pitch angle of the drum and thus an advantageous noise-free reproduction without cross talk and also so-called search or trick play. Advantageously, the magnetic strip branches are mechanically decoupled in front of and behind the rotary drum. This makes it possible to narrow the accuracy requirements for the entire drive to a 35 compact unit. Furthermore, it is advantageous that small inaccuracies in the banding outside the detector unit do not affect the tracking or detection accuracy.
Yderligere fordele fremgår af den efterfølgende beskrivelse af 3Further advantages are apparent from the following description of 3
DK 164977 BDK 164977 B
udførelseseksempler under henvisning til tegningen, hvor fig. 1 i et forenklet sidebillede viser en drejetromle med to førings- og omstyringsstifter, 5 fig. 2 et drivværk set ovenfra med magnetbåndføringsmekanismen ifølge opfindelsen i forbindelse med en videokassette, fig. 3 et snit A-B som antydet i fig. 4 og fig. 4 et udsnit set ovenfra af et drivværk med indtegnet snitlinie A-B.with reference to the drawing, in which fig. 1 in a simplified side view shows a rotary drum with two guide and steering pins; 2 is a top plan view of the magnetic tape guiding mechanism according to the invention in connection with a video cassette; FIG. 3 shows a section A-B as indicated in FIG. 4 and FIG. 4 is a top plan view of a drive unit with section line A-B.
10 I fig. 1 er der vist en skråt lejret drejetromle 2, som delvis omslynges skruelinieformet af et bånd 20. Tilførslen og bortførslen af båndet 20 sker over en respektiv cylindrisk omstyringsstift 8.10 In FIG. 1, there is shown a beveled rotary drum 2 which is partially wrapped helically by a belt 20. The delivery and removal of the belt 20 takes place over a respective cylindrical guide pin 8.
Disse ikke-roterende omstyringsstifter 8 er udført som vippe- eller 15 pendul stifter, idet de er bevægelige om en tværgående akse 22 lige under båndmidten 23. Pendulaksen står omtrent vinkelret på båndgrenene, som føres på hovedtromlen. Mellem omstyringsstifterne 8 og drejetromlen 2 er der anbragt føringsstifter 9 og 10, som i nærheden af deres øverste ende har en flange, på hvis underkant overkanten af 20 båndet 20 bæres. Ved den halve sløjfevinkel af båndet 20 er der i nærheden af den nederste drejetromlekant anbragt en fast placeret båndføring 11, mod hvis afrundede overflade underkanten af båndet 20 ligger. Båndføringen 11 rager ind i et spor 24 på drejetromlen 2.These non-rotating pivot pins 8 are designed as rocker or pendulum pins, being movable about a transverse axis 22 just below the belt center 23. The pendulum axis is approximately perpendicular to the belt branches which are carried on the main drum. Between the guide pins 8 and the rotary drum 2 are arranged guide pins 9 and 10, which have a flange near their upper end on whose lower edge the upper edge of the band 20 is supported. At the half-loop angle of the belt 20, a fixedly positioned belt guide 11 is arranged near the lower rotary drum edge, against whose rounded surface the lower edge of the belt 20 lies. The tape guide 11 projects into a groove 24 of the rotary drum 2.
25 I fig· 2 er der vist et drivværk med en indlagt videokassette 1. En trykvalse 4, omstyringsstifterne 8 samt en omstyringsvalse 12 og en båndstrækføler 13 har trukket båndet 20 ud af videokassetten 1 og som påkrævet via føringsstifterne 9 og 10 lagt det over drejetromlen 2, således at båndet 20 slynger sig skruelinieformet omkring dreje-30 tromlen 2 med 180°. Dermed bliver båndet trykket mod kapstanakslen 3 og løber forbi et lydhoved 5, et lydslettehoved 6 og et slettehoved 7, når drivværket er sat i drift, og således bliver båndet 20 transporteret fra den venstre fulde spole til den højre tomme spole på videokassetten. Båndtransportretningen og drejeretningen af 35 drejetromlen 2 stemmer overens. Ved det høje omdrejningstal for drejetromlen 2 bliver der ved båndindløbet i nærheden af omstyringsstiften 9 presset luft ind mellem båndet 20 og overfladen af drejetromlen 2, således at der, som det er kendt indenfor teknikken, dannes en luftpude.25 In Fig. 2 is shown a drive with an inserted video cassette 1. A pressure roller 4, the control pins 8 as well as a control roller 12 and a belt tension sensor 13 have pulled the tape 20 out of the video cassette 1 and, as required via the guide pins 9 and 10, placed it over the turning drum. 2, so that the belt 20 is wound helically around the rotary drum 2 by 180 °. Thus, the tape is pressed against the capstan shaft 3 and passes a sound head 5, a sound erase head 6 and a erase head 7 when the drive is put into operation, and thus the tape 20 is transported from the left full coil to the right empty coil of the video cassette. The belt conveying direction and the direction of rotation of the rotary drum 2 correspond. At the high rotational speed of the rotary drum 2, air is forced into the belt in the vicinity of the guide pin 9 between the belt 20 and the surface of the rotary drum 2, so that, as is known in the art, an air cushion is formed.
44
DK 164977 BDK 164977 B
Fig. 3 og 4 viser som eksempel en alternativt virkende højdeind-stillingsmekanisme for føringsstifterne 9 og 10. Det er med disse muligt at opnå en ændring af stigningsvinklen omkring drejetromlen 2. Foruden de i fig. 1 og 2 med tilsvarende henvisningstal allerede 5 viste og tidligere omtalte dele af mekanismen er der her vist en bundplade 25, på hvilken drejetromlen 2 og også føringsstifterne 9 og 10 er fastgjort. Fastgørelse af de sidstnævnte er foretaget med gevindbøsninger med modsat stigning, og som drives over vippearme af en el ektrodynami sk omformer 21 over en med en magnetkerne forbundet 10 forskydningsstang. Spolerne til omformeren 21 bliver for at regulere sporhældningsvinklen påtrykt en strøm, som dannes ved summeringen af differenssignalet mellem den første sporhalvdel og det inverterede differenssignal af den anden sporhalvdel. Den således forårsagede højdeindstilling af føringsstifterne 9 og 10 bevirker en vipning af 15 sporsti 11 ingen af båndet 20 omkring den faste båndføring 11.FIG. 3 and 4 illustrate, for example, an alternate acting height adjustment mechanism for the guide pins 9 and 10. It is thereby possible to achieve a change in the pitch angle around the rotary drum 2. In addition to the 1 and 2 with corresponding reference numerals already shown 5 and previously mentioned parts of the mechanism, there is shown here a base plate 25 on which the rotary drum 2 and also the guide pins 9 and 10 are fixed. Fastening of the latter is done with opposite socket threaded bushes, which are driven over the rocker arms by an electric electrodynamic converter 21 over a displacement rod connected to a magnetic core. In order to regulate the track inclination angle, the coils of converter 21 are applied to a current which is formed by summing the difference signal between the first half of the track and the inverted difference signal of the second half of the track. The height adjustment thus caused by the guide pins 9 and 10 causes a tilt of 15 track path 11 of none of the band 20 around the fixed band guide 11.
For den allerede omtalte mekaniske afkobling samt for at levere et moment på tværs af båndets bevægelsesretning benyttes der omstyringsstifter 8, hvis vippeakse er forskudt i forhold til 20 båndmidten med omkring 10% af båndbredden. Der dannes et let forvrænget båndspændingsprofil. Derved fås en på tværs af båndets bevægelsesretning opadrettet kraft, som optages af den efterfølgende højdeføringsstift 10 over båndkanten ved randen af dens flange.For the mechanical decoupling already mentioned as well as to deliver a torque across the direction of movement of the belt, steering pins 8 are used, whose tilt axis is offset relative to the belt center by about 10% of the bandwidth. A slightly distorted band tension profile is formed. Thereby an upward force is obtained transverse to the direction of movement of the belt, which is received by the subsequent height guide pin 10 over the belt edge at the edge of its flange.
25 Da omstyringsstifterne 8 er udført som pendul stifter og bringer båndet 20 fra videokassetten til spilleposition, er det ikke nødvendigt med nogen justering af dette i dets indstilling.Since the control pins 8 are designed as pendulum pins and bring the tape 20 from the video cassette to the playing position, no adjustment thereof is necessary in its setting.
Som opsummering skal det fastslås, at korrektionssignalet for 30 sporingen via højdeindstillingen af føringsstifterne 9 og 10 således som kapstanreguleringen fås fra de med videosignalerne registrerede fire pilotfrekvenser F1-F4 ved differensmåling af krydstalen mellem nabospor. Den således udførte kapstanregulering er kendt som ATF ("Automatic track following"). Ved den såkaldte DTF ("Dynamic track 35 following")-system sker sporingen med PXC-elementer som bærere for videohovederne. Det til dette formål benyttede korrektionssignal bliver på lignende måde genereret ud fra fire pilotfrekvenser.In summary, it is to be noted that the correction signal for the tracking via the height adjustment of the guide pins 9 and 10 is obtained as the capstan control from the four pilot frequencies F1-F4 recorded with the video signals by differential measurement of the crossover between neighboring tracks. The capstan control thus performed is known as ATF ("Automatic track following"). In the so-called DTF ("Dynamic track 35 following") system, the tracking is done with PXC elements as carriers for the video heads. The correction signal used for this purpose is similarly generated from four pilot frequencies.
Claims (5)
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19833300378 DE3300378C2 (en) | 1983-01-07 | 1983-01-07 | Magnetic tape guide device for a video recording and reproducing device |
DE19833300303 DE3300303C2 (en) | 1983-01-07 | 1983-01-07 | Head drum with video recording and playback heads rotating around an axis |
DE3300378 | 1983-01-07 | ||
DE3300303 | 1983-01-07 | ||
EP8400005 | 1984-01-09 | ||
PCT/EP1984/000005 WO1984002796A1 (en) | 1983-01-07 | 1984-01-09 | Drive mechanism for video recorder |
Publications (4)
Publication Number | Publication Date |
---|---|
DK415384A DK415384A (en) | 1984-08-30 |
DK415384D0 DK415384D0 (en) | 1984-08-30 |
DK164977B true DK164977B (en) | 1992-09-21 |
DK164977C DK164977C (en) | 1993-02-08 |
Family
ID=25807424
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK415384A DK164977C (en) | 1983-01-07 | 1984-08-30 | RAIL TRANSPORT MECHANISM FOR A VIDEO RECORDER |
Country Status (6)
Country | Link |
---|---|
EP (2) | EP0115275B1 (en) |
KR (2) | KR930001876B1 (en) |
DE (2) | DE3465533D1 (en) |
DK (1) | DK164977C (en) |
FI (1) | FI81460C (en) |
WO (2) | WO1984002797A1 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
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FR2571575B1 (en) * | 1984-10-08 | 1989-08-18 | Enertec | APPARATUS FOR RECORDING AND READING INFORMATION ON A MAGNETIC TAPE |
DE3705927A1 (en) * | 1987-02-25 | 1988-09-08 | Broadcast Television Syst | SCANNER DEVICE FOR A SLOPE TRACK MAGNETIC TAPE DEVICE |
US5067035A (en) * | 1987-05-22 | 1991-11-19 | Kudelski Sa Fabrique De'enregistreurs Nagra | Error prevention in a recording and reproducing device with at least one rotating head |
DE3743219C2 (en) * | 1987-12-19 | 1993-11-25 | Grundig Emv | Magnetic tape device |
USRE37133E1 (en) * | 1988-09-28 | 2001-04-10 | Fernz Timber Protection Limited | Method of preparing a borate organic complex anion containing salt compositions |
NZ226377A (en) * | 1988-09-28 | 1992-06-25 | Nigel Paul Maynard | Water-insoluble biocidal or preservative composition comprising a borate organic complex ion and a biocidally active cationic species |
JPH0334147A (en) * | 1989-06-29 | 1991-02-14 | Sony Corp | Tape guiding device for helical scan type recording and reproducing machine |
JP2858627B2 (en) * | 1994-03-07 | 1999-02-17 | 日本ビクター株式会社 | Magnetic recording / reproducing device |
US5982590A (en) * | 1993-09-23 | 1999-11-09 | Victor Company Of Japan, Ltd. | Magnetic recording/reproducing apparatus with tilting head drum for dynamic tracking |
US5742456A (en) * | 1995-02-28 | 1998-04-21 | Victor Company Of Japan | Magnetic recording/reproducing apparatus with a positioning mechanism for a tape guide drum |
GB2308723B (en) * | 1995-12-26 | 2000-01-26 | Daewoo Electronics Co Ltd | Video cassette recorder |
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DE1004039C2 (en) * | 1953-02-20 | 1957-08-14 | Siemens Ag | All-round movable roller for film or tape drives |
DE927999C (en) * | 1953-07-01 | 1955-05-23 | Telefunken Gmbh | Apparatus for magnetic recording and reproduction of television images |
DE1031984B (en) * | 1954-03-17 | 1958-06-12 | Frieseke & Hoepfner Gmbh | Roller arranged in the film path and movable in all directions relative to the film plane |
US2894702A (en) * | 1956-08-13 | 1959-07-14 | Cons Electrodynamics Corp | Gimbaled roller |
US2919314A (en) * | 1956-10-16 | 1959-12-29 | Teletrak Corp | Means for recording and/or reproducing recorded high frequency signals |
GB1039261A (en) * | 1962-08-17 | 1966-08-17 | Thermionic Products Electronic | Improvements in or relating to tape guiding devices |
GB1133775A (en) * | 1964-11-28 | 1968-11-20 | Victor Company Of Japan | An apparatus for magnetic recording and reproducing a video signal |
US3614831A (en) * | 1969-09-12 | 1971-10-26 | Sperry Rand Corp | Method of making a hard-surface rotor containing magnetic transducers |
US3658227A (en) * | 1970-04-03 | 1972-04-25 | John F Stephens | Tape guide spindle |
US3697676A (en) * | 1971-06-08 | 1972-10-10 | Cartridge Television Inc | Head-to-tape alignment apparatus and method |
US3943566A (en) * | 1974-07-17 | 1976-03-09 | International Business Machines Corporation | Dynamic skew correction for rotating head magnetic recorder |
FR2281607A1 (en) * | 1974-08-05 | 1976-03-05 | Staar Sa | DEVICE FOR POSITIONING A MAGNETIC TAPE IN A RECORDING AND / OR REPRODUCTION APPARATUS WITH ROTATING HEAD |
DE2519700A1 (en) * | 1975-05-02 | 1976-11-11 | Bosch Gmbh Robert | Control track sensor fixing in magnetic tape recording - is in radially located cylinder in guide drum and is capable of radial adjustment |
US3996619A (en) * | 1975-08-14 | 1976-12-07 | Eastman Kodak Company | Tape edge guide for a fully rotatable drum |
DE2607639A1 (en) * | 1976-02-25 | 1977-09-01 | Siemens Ag | DEVICE FOR RECORDING AND / OR SCANNING INFORMATION ON A MAGNETIC TAPE |
DE2656026C2 (en) * | 1976-12-10 | 1982-03-11 | Robert Bosch Gmbh, 7000 Stuttgart | Magnetic recording and / or reproducing device for a tape-shaped recording medium |
JPS5665354A (en) * | 1979-10-29 | 1981-06-03 | Hitachi Ltd | Structure of magnetic tape run system |
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1984
- 1984-01-07 KR KR1019840000039A patent/KR930001876B1/en not_active IP Right Cessation
- 1984-01-07 KR KR1019840000040A patent/KR930001877B1/en not_active IP Right Cessation
- 1984-01-09 WO PCT/EP1984/000006 patent/WO1984002797A1/en unknown
- 1984-01-09 EP EP84100142A patent/EP0115275B1/en not_active Expired
- 1984-01-09 DE DE8484100142T patent/DE3465533D1/en not_active Expired
- 1984-01-09 WO PCT/EP1984/000005 patent/WO1984002796A1/en active IP Right Grant
- 1984-01-09 DE DE8484100141T patent/DE3467450D1/en not_active Expired
- 1984-01-09 EP EP84100141A patent/EP0115776B1/en not_active Expired
- 1984-08-30 DK DK415384A patent/DK164977C/en active
- 1984-09-05 FI FI843476A patent/FI81460C/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP0115776B1 (en) | 1987-11-11 |
KR840008866A (en) | 1984-12-19 |
EP0115275B1 (en) | 1987-08-19 |
FI81460C (en) | 1990-10-10 |
KR840008865A (en) | 1984-12-19 |
FI843476A0 (en) | 1984-09-05 |
EP0115275A1 (en) | 1984-08-08 |
DK415384A (en) | 1984-08-30 |
FI81460B (en) | 1990-06-29 |
FI843476A (en) | 1984-09-05 |
KR930001876B1 (en) | 1993-03-18 |
DE3467450D1 (en) | 1987-12-17 |
DK415384D0 (en) | 1984-08-30 |
WO1984002797A1 (en) | 1984-07-19 |
DE3465533D1 (en) | 1987-09-24 |
WO1984002796A1 (en) | 1984-07-19 |
DK164977C (en) | 1993-02-08 |
EP0115776A1 (en) | 1984-08-15 |
KR930001877B1 (en) | 1993-03-18 |
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