US3106319A - Adhesive drive for a tape-shaped signal carrier - Google Patents

Adhesive drive for a tape-shaped signal carrier Download PDF

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US3106319A
US3106319A US829206A US82920659A US3106319A US 3106319 A US3106319 A US 3106319A US 829206 A US829206 A US 829206A US 82920659 A US82920659 A US 82920659A US 3106319 A US3106319 A US 3106319A
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tape
cylinder
particles
driving
drive
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US829206A
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Fischer Markus
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/32—Friction members
    • F16H55/34—Non-adjustable friction discs
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K13/00—Conveying record carriers from one station to another, e.g. from stack to punching mechanism
    • G06K13/18—Conveying record carriers from one station to another, e.g. from stack to punching mechanism the record carrier being longitudinally extended, e.g. punched tape
    • G06K13/20—Details
    • G06K13/22—Capstans; Pinch rollers
    • 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
    • G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/26—Driving record carriers by members acting directly or indirectly thereon
    • G11B15/28—Driving record carriers by members acting directly or indirectly thereon through rollers driving by frictional contact with the record carrier, e.g. capstan; Multiple arrangements of capstans or drums coupled to means for controlling the speed of the drive; Multiple capstan systems alternately engageable with record carrier to provide reversal
    • G11B15/29—Driving record carriers by members acting directly or indirectly thereon through rollers driving by frictional contact with the record carrier, e.g. capstan; Multiple arrangements of capstans or drums coupled to means for controlling the speed of the drive; Multiple capstan systems alternately engageable with record carrier to provide reversal through pinch-rollers or tape rolls
    • 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
    • G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/26—Driving record carriers by members acting directly or indirectly thereon
    • G11B15/34—Driving record carriers by members acting directly or indirectly thereon through non-slip drive means, e.g. sprocket

Definitions

  • This invention relates to an adhesion drive for a tapesh-aped signal carrier adapted to be fed through a signal recording or signal reproducing apparatus, such as a mag netic sound tape, a perforated tape or the like, wherein the speed of the signal carrier is controlled by contact thereof with a rotating cylinder.
  • FIG. 1 is a fragmentary, enlarged sectional view showing a portion of the driving cylinder engaged by a tape;
  • FIG. 2 is a similar view illustrating the manufacturing process utilized to embed the diamond particles in the driving cylinder.
  • FIG. 3 is a plan view illustrating a pressing roller urging the tape into contact with the rotating driving cylinder.
  • the driving cylinder should be made of a relatively soft, stainless material such as unhardened stainless steel, coppenbrass or a plastic material,- diamond particles having a size in the order of 20 to p. for a cylinder diameter of 5 to 10 mm. being rolled into the surface of the driving cylin der in such a manner that approximately half the particles project from the surface of the cylinder.
  • the sizeof the particles may increase with increasing diameter of the driving cylinder, and the size should be chosen in such a way that fluctuation of the driving speed is impossible due to inequalities in the engagement of the tape with the particles.
  • a pressing roller should be used having an axial length not exceeding the width of the tape as shown in FIG. 3 in order that the roller contacts the tape only and not the driving roller. It was found that a roller contacting the tape and the driving cylinder often causes deviations of the tape speed from the circumferential Speed of the driving cylinder because the tape is driven by the pressing roller. It is a particular advantage of this invention that the driving cylinder is practically not worn due to the absence of slip and due to the high hardness of the particles forming the driving surface.
  • Manufacture of the driving cylinder is relatively simple. However, some important indications mentioned here after should be followed.
  • the surface of the cylinder is to be worked, for instance ground, to be very smooth.
  • a pasty substance contain- I slowly approached to a distance in the order of of a millimeter from the cylinder surface, whereby the pasty substance is first equally distributed on the cylinder surface without pressing the hard particles into the cylinder surface.
  • the roller is further approached substantially into contact with the surface of the driving cylinder whereby the particles are rolled into the relatively soft cylinder surface.
  • the hardened outer race of a ball bearing may be used as a pressure roller, this ball bearing being tixcd on a slightly resilient support. During this operation the speed of the cylinder surface should be relatively low and should not exceed 10 cm./sec.
  • This invention may be used in all kinds of apparatus used in sound-picture production, in magnetic picture recording machines for television, and for automatic control of machines by means of perforated tapes or the like, wherein the higher precision and the longer lift-time of the drive are very important.
  • the drive may also be used where the cylinder is not driven by a motor and does not drive tie tape, but where the cylinder is driven by the tape.
  • Such an arrangement is used when equalizing the speed of tapes fed by means of toothed rollers engaging perforations or" the tape, such tapes being fed over an adhesion cylinder connected to a flywheel, the adhesion cylinder and flywheel equalizing fluctuations of the tape speed due to the drive thereof by means of toothed rollers.
  • the long life-time of the rough surface of the driving cylinder is of particular advantage for machines used for producing tape copies from an original, such machines having very high running times of up to 24 hours per day.
  • An adhesion drive for a magnetic recording tape having an active layer comprising individual particles of magnetizablc material at one side of said tape comprising a rotating cylinder and means for maintaining the said tape in contact with the rotating cylinder in order to maintain the speed of the tape equal to the circumferential speed of the rotating cylinder, the said cylinder having a. smooth cylindrical surface, hard particles being partially pressed and thus anchored in the said surface of the cylinder, the remaining portion of the particles projecting from the said surface and contacting the active layer of the said magnetic recording tape, the said hard particles having a size in the same order as the size of the individual particles of the said active layer.
  • An adhesion drive for a recording tape comprising a rotating cylinder having a smooth cylindrical surface and means for maintaining the said tape in contact with the cylindrical surface of the rotating cylinder in order to maintain the speed of the tape equal to the circumferential speed of the rotating cylinder, hard particles being anchored in the said cylindrical surface of the rotating cylinder with portions of all particles being inserted into the cylindrical surface to an equal depth, the remaining portion of the particles projecting from the cylindrical surface and uniformly contacting the tape on the cylindrical driving surface.
  • An adhesion drive for a recording tape comprising a rotating cylinder having a smooth cylindrical surface and means for maintaining the said tape in contact with the cylindrical surface of the rotating cylinder in order to maintain the speed of the tape equal to the circumferential speed of the rotating cylinder, hard particles having a size of less than 1 being anchored in the said smooth cylindrical surface of the rotating cylinder with portions of such particles being inserted into the cylindrical surface of the rotating cylinder, the remaining portion of the particles projecting from the cylindrical surface and contacting the said recording tape, said particles being substantially uniformly distributed at random on said smooth cylindrical surface.
  • An adhesion drive according to claim 3, comprising a rotating cylinder of stainless steel.
  • An adhesion drive for recording tape comprising a metallic rotating cylinder having a smooth cylindrical surace and means for maintaining the said tape in contact with the cylindrical surface of the rotating cylinder in order to maintain the speed of the tape equal to the circuinferential speed of the rotating cylinder, the said cylindrical surface having a diameter in the order of 5-10 mm. and hard particles having a size in accordance with the said diameter of the cylindrical sunface in the order of 20-100, being anchored in the said cylindrical surface of the rotating cylinder with portions of such particles inserted into the cylindrical surface of the rotating cylinder, the remaining portion of the paiticles projecting from the cylindrical surface and contacting the said recording tape.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Description

Oct. 8, 1963 M. FISCHER 3,106,319
ADHESIVE DRIVE FOR A TAPE-SHAPED SIGNAL CARRIER Filed July 24, 1959 achve lager n 1 slgnalcarr|er garner drlvlng cghnder l. f skinless sid diamond compound cglinder pressing roller INVENTOR Markus Flscher ATTORNEY United States Patent 3,106,319 ADHESIVE DRIVE FOR A TAPE-SHAPED SIGNAL CARRIER Markus Fischer, Garbeuweg 13, Bumpliz, near Bern, Switzerland Filed July 24, 1959, Ser. No. 829,206 Claims priority, application Switzerland July 29, 1958 6 Claims. (Cl. 226-193) This invention relates to an adhesion drive for a tapesh-aped signal carrier adapted to be fed through a signal recording or signal reproducing apparatus, such as a mag netic sound tape, a perforated tape or the like, wherein the speed of the signal carrier is controlled by contact thereof with a rotating cylinder.
The most important problem with adhesion drives of this kind, which has not been solved satisfactorily up to date, is the slip between the signal carrying tape and the said rotating cylinder which must be avoided to prevent fluctuations of the tape speed. It is well known that fluctuations of the speed of a magnetic sound recorder result in distortions of the high frequencies or in fluctuations of the sound reproduced from the tape, according to whether such speed fluctuations are of high or low frequency. Further when using sound recording tapes for recording the accompanying sound of films or television, the synchronism between the picture and the sound is gradually lost during reproduction due to the continuously occurring slip between the sound recording tape and its driving cylinder.
Attempts have been made for overcoming these difficulties by coating the driving cylinder with rubber, plastic material or the like for increasing the adhesion, but this measure has the drawback that the driving cylinder must be cleaned rather frequently and that the soft surface is subject to deformation after a relatively short time of operation. For avoiding :these defects the use of a hardened and roughened steel cylinder was also proposed, whereby the tape is pressed against the cylinder by means of a roller of soft material such as nylon To allow the use of a relatively thin steel, driving cylinder the active layer of the sound recording tape was fed through the machine in contact with the driving cylinder and the nylon roller applied with a very high pressure. However, it was found that the roughness of the hardened steel cylinder is rapidly ground off by the sound recording tape so that the adhesion between the cylinder and the tape decreases to values allowing undue slip between these elements. Therefore, extremely thick driving cylinders have been used for first class instruments. However, even this measure does not entirely avoid slip between the driving cylinder and the sound recording tape.
It is the main object of this invention to provide an adhesion drive which is simple in manufacture and by which slippage between the driving cylinder and the tape is completely avoided, said drive comprising a driving roller having a cylindrical surface to be contacted by the said tape-shaped signal carrier, or tape, the said surface being provided with hard projecting particles such as diamond particles.
The novel features that are considered characteristic of the invention are set forth with particularity in the appended claims. The invention itself, however, both as to its organization and its method of operation, together with additional objects and advantages thereof, will best be understood from the following description of a specific embodiment when read in connection with the accompanying drawings, and in which:
FIG. 1 is a fragmentary, enlarged sectional view showing a portion of the driving cylinder engaged by a tape;
FIG. 2 is a similar view illustrating the manufacturing process utilized to embed the diamond particles in the driving cylinder; and
FIG. 3 is a plan view illustrating a pressing roller urging the tape into contact with the rotating driving cylinder. Q
Referring now to the drawings, the driving cylinder, or roller, should be made of a relatively soft, stainless material such as unhardened stainless steel, coppenbrass or a plastic material,- diamond particles having a size in the order of 20 to p. for a cylinder diameter of 5 to 10 mm. being rolled into the surface of the driving cylin der in such a manner that approximately half the particles project from the surface of the cylinder. The sizeof the particles may increase with increasing diameter of the driving cylinder, and the size should be chosen in such a way that fluctuation of the driving speed is impossible due to inequalities in the engagement of the tape with the particles. Further, in order to obtain proper engagement of the tape with the projecting portions of the urging the tape against the driving cylinder may be decreased to a fifth or tenth of the pressure used in known apparatuses. A pressing roller should be used having an axial length not exceeding the width of the tape as shown in FIG. 3 in order that the roller contacts the tape only and not the driving roller. It was found that a roller contacting the tape and the driving cylinder often causes deviations of the tape speed from the circumferential Speed of the driving cylinder because the tape is driven by the pressing roller. It is a particular advantage of this invention that the driving cylinder is practically not worn due to the absence of slip and due to the high hardness of the particles forming the driving surface. When using a synchronous motor for rotating the driving cylinder, an exactly synchronous running of the tape may be secured for considerable running periods of the apparatus. Due to the reduced radial pressure of the pressure roller, friction in the driving system may substantially be reduced so that smaller flywheels and smaller driving rnotors may be used, and the total dimensions, weight and cost of the apparatus may accordingly be reduced. If sufiicient poll is set up in the tape and when the looping angle or angle of grip of the tape on the driving cylinder is relatively great, a pressing roller may be dispensed with. In this manner, an apparatus Without any part of plastic or other soft material may be obtained. It is further possible to increase the adhesion between the driving cylinder and a sound recording tape of a sound recorder without solenoid-operated pressure roller for fast start, by passing the active layer of the tape in contact with the driving cylinder, whereby the size of the hard particles of the driving cylinder rnay preferably be equal to the size of the particles of the active tape layer. In this way some sort of gear-like engagement between the particles of the tape and of the cylinder will occur resulting in an absolutely slip-less drive.
Manufacture of the driving cylinder is relatively simple. However, some important indications mentioned here after should be followed. The surface of the cylinder is to be worked, for instance ground, to be very smooth.
To the so smoothened surface a pasty substance contain- I a slowly approached to a distance in the order of of a millimeter from the cylinder surface, whereby the pasty substance is first equally distributed on the cylinder surface without pressing the hard particles into the cylinder surface. When the desired distribution and thickness of the substance has been attained the roller is further approached substantially into contact with the surface of the driving cylinder whereby the particles are rolled into the relatively soft cylinder surface. As an example, the hardened outer race of a ball bearing may be used as a pressure roller, this ball bearing being tixcd on a slightly resilient support. During this operation the speed of the cylinder surface should be relatively low and should not exceed 10 cm./sec. Smoothing the cylinder surface and providing it with the hard particles in the manner just described should be done before the cylinder is removed from its clamping in the lathe, or other machine used for fabricating the driving cylinder in order to first obtain an absolutely cylindrical driving surface in which all hard particles are thereafter inserted to an absolutely equal depth.
This invention may be used in all kinds of apparatus used in sound-picture production, in magnetic picture recording machines for television, and for automatic control of machines by means of perforated tapes or the like, wherein the higher precision and the longer lift-time of the drive are very important.
Of course the drive may also be used where the cylinder is not driven by a motor and does not drive tie tape, but where the cylinder is driven by the tape. Such an arrangement is used when equalizing the speed of tapes fed by means of toothed rollers engaging perforations or" the tape, such tapes being fed over an adhesion cylinder connected to a flywheel, the adhesion cylinder and flywheel equalizing fluctuations of the tape speed due to the drive thereof by means of toothed rollers.
The long life-time of the rough surface of the driving cylinder is of particular advantage for machines used for producing tape copies from an original, such machines having very high running times of up to 24 hours per day.
What I claim is:
1. An adhesion drive for a magnetic recording tape having an active layer comprising individual particles of magnetizablc material at one side of said tape, comprising a rotating cylinder and means for maintaining the said tape in contact with the rotating cylinder in order to maintain the speed of the tape equal to the circumferential speed of the rotating cylinder, the said cylinder having a. smooth cylindrical surface, hard particles being partially pressed and thus anchored in the said surface of the cylinder, the remaining portion of the particles projecting from the said surface and contacting the active layer of the said magnetic recording tape, the said hard particles having a size in the same order as the size of the individual particles of the said active layer.
2. An adhesion drive for a recording tape, comprising a rotating cylinder having a smooth cylindrical surface and means for maintaining the said tape in contact with the cylindrical surface of the rotating cylinder in order to maintain the speed of the tape equal to the circumferential speed of the rotating cylinder, hard particles being anchored in the said cylindrical surface of the rotating cylinder with portions of all particles being inserted into the cylindrical surface to an equal depth, the remaining portion of the particles projecting from the cylindrical surface and uniformly contacting the tape on the cylindrical driving surface.
3. An adhesion drive for a recording tape, comprising a rotating cylinder having a smooth cylindrical surface and means for maintaining the said tape in contact with the cylindrical surface of the rotating cylinder in order to maintain the speed of the tape equal to the circumferential speed of the rotating cylinder, hard particles having a size of less than 1 being anchored in the said smooth cylindrical surface of the rotating cylinder with portions of such particles being inserted into the cylindrical surface of the rotating cylinder, the remaining portion of the particles projecting from the cylindrical surface and contacting the said recording tape, said particles being substantially uniformly distributed at random on said smooth cylindrical surface.
4. An adhesion drive according to claim 3, comprising particles of substantially equal size.
5. An adhesion drive according to claim 3, comprising a rotating cylinder of stainless steel.
6. An adhesion drive for recording tape, comprising a metallic rotating cylinder having a smooth cylindrical surace and means for maintaining the said tape in contact with the cylindrical surface of the rotating cylinder in order to maintain the speed of the tape equal to the circuinferential speed of the rotating cylinder, the said cylindrical surface having a diameter in the order of 5-10 mm. and hard particles having a size in accordance with the said diameter of the cylindrical sunface in the order of 20-100, being anchored in the said cylindrical surface of the rotating cylinder with portions of such particles inserted into the cylindrical surface of the rotating cylinder, the remaining portion of the paiticles projecting from the cylindrical surface and contacting the said recording tape.
References Cited in the file of this patent UNITED STATES PATENTS 1,072,564 Bowers Sept. 9, 1913 1,097,565 Straubel May 19, 1914 1,579,657 Perrault Apr. 6, 1926 1,800,443 Dustan et al Apr. 14, 1931 2,024,007 McColloch et al Dec. 10, 1935 2,367,203 Cooper Ian. 16, 1945 2,490,548 Schultz Dec. 6, 1949 2,499,700 Tinkham et al. Mar. 7, 1950 2,555,319 Cross June 5, 1951 2,568,000 Gunn Sept. 18, 1951 2,622,873 Wenneche Dec. 23, 1952 2,827,389 Garner Mar. 18, 1958 2,920,148 Munroe Jan. 5, 1960 FOREIGN PATENTS 317,214 Switzerland Dec. 29, 1956 956,341 France Aug. 1, 1949

Claims (1)

  1. 2. AN ADHESION DRIVE FOR A RECORDING TAPE, COMPRISING A ROTATING CYLINDER HAVING A SMOOTH CYLINDRICAL SURFACE AND MEANS FOR MAINTAINING THE SAID TAPE IN CONTACT WITH THE CYLINDRICAL SURFACE OF THE ROTATING CYLINDER IN ORDER TO MAINTAIN THE SPEED OF THE TAPE EQUAL TO THE CIRCUMFER-
US829206A 1958-07-29 1959-07-24 Adhesive drive for a tape-shaped signal carrier Expired - Lifetime US3106319A (en)

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CH (1) CH361409A (en)
DE (1) DE1160675B (en)
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1280317B (en) * 1965-09-17 1968-10-17 Telefunken Patent Method and device for pressing diamond particles into the surface of a drive shaft for tape-shaped recording media
US3430390A (en) * 1965-12-17 1969-03-04 Whittaker Corp Cutting machines and tools for composite materials
US3503108A (en) * 1963-12-31 1970-03-31 Ibm Cutting and sawing blades
US3524781A (en) * 1966-03-02 1970-08-18 American Can Co Application of thin line adhesive to a sheet using a grooved roll as applicator
US3640027A (en) * 1969-07-25 1972-02-08 Sel Rex Corp Annular cutting blades
FR2440596A1 (en) * 1978-11-02 1980-05-30 Philips Nv DRIVE DEVICE FOR WEB-SHAPED RECORDING CARRIER
US4466564A (en) * 1981-09-14 1984-08-21 Minnesota Mining And Manufacturing Company Belt for belt-driven recording tape pack
US4581189A (en) * 1981-09-14 1986-04-08 Minnesota Mining And Manufacturing Company Method of making a belt for belt-driven recording tape pack
EP0474099A2 (en) * 1990-08-29 1992-03-11 Matsushita Electric Industrial Co., Ltd. Tape driving mechanism for magnetic recording apparatus
US5131891A (en) * 1991-02-04 1992-07-21 Gigatek Memory Systems Limited Partnership Highly durable tape cartridge drive belt

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Publication number Priority date Publication date Assignee Title
US1072564A (en) * 1912-12-02 1913-09-09 George W Bowers Machine for making grinding-laps.
US1097565A (en) * 1907-07-22 1914-05-19 Zeiss Carl Fa Glass-surface-working tool.
US1579657A (en) * 1924-10-20 1926-04-06 Hood Rubber Co Inc Roller guide for flap cutting and building machines
US1800443A (en) * 1929-11-02 1931-04-14 Manning Maxwell & Moore Inc Side-scrap deflector
US2024007A (en) * 1935-01-24 1935-12-10 John M Mccolloch Method of producing mat finish on hardened rolls
US2367203A (en) * 1941-01-30 1945-01-16 Jacques Rousso Roll holder
US2490548A (en) * 1945-07-07 1949-12-06 Gen Motors Corp Method of making composite articles
FR956341A (en) * 1950-01-31
US2499700A (en) * 1947-12-30 1950-03-07 Magnecord Inc Magnetic recording and reproducing apparatus
US2555319A (en) * 1943-04-19 1951-06-05 Minnesota Mining & Mfg Bead coated tympan sheet
US2568000A (en) * 1948-07-03 1951-09-18 Claude M Gunn Sound recording and reproducing apparatus
US2622873A (en) * 1948-02-16 1952-12-23 Fort Howard Paper Co Apparatus for dispensing sheet material from rolls
CH317214A (en) * 1951-11-30 1956-11-15 Wilhelm Dr Mueller Process for the production of metallic devices or machine elements which have a wear-resistant surface and are mainly subjected to sliding
US2827389A (en) * 1954-09-07 1958-03-18 Bruce E L Co Method of filling and sanding rotary cut ring porous hardwood
US2920149A (en) * 1957-11-21 1960-01-05 Sonotone Corp Magnetic record transducing heads

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US1383692A (en) * 1920-02-21 1921-07-05 David M Benford Pulley-face-frictioning composition
DE475398C (en) * 1926-04-22 1929-04-23 Wilhelm Pilz Cover for pulleys
CH217278A (en) * 1941-05-03 1941-10-15 Jaeger Sulzer Otto Guide device for the sound wire on the head of steel sound machines.
DE840774C (en) * 1950-02-03 1952-06-05 Loewe Opta Ag Drive device for tapes with high-speed device, especially for tapes
US2747025A (en) * 1951-10-05 1956-05-22 Ampex Magnetic tape apparatus and tape driving means therefor
DE1698749U (en) * 1953-03-17 1955-05-18 Zeiss Ikon Ag TRANSPORT ROLLER FOR TAPE-SHAPED CONVEYORS.

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR956341A (en) * 1950-01-31
US1097565A (en) * 1907-07-22 1914-05-19 Zeiss Carl Fa Glass-surface-working tool.
US1072564A (en) * 1912-12-02 1913-09-09 George W Bowers Machine for making grinding-laps.
US1579657A (en) * 1924-10-20 1926-04-06 Hood Rubber Co Inc Roller guide for flap cutting and building machines
US1800443A (en) * 1929-11-02 1931-04-14 Manning Maxwell & Moore Inc Side-scrap deflector
US2024007A (en) * 1935-01-24 1935-12-10 John M Mccolloch Method of producing mat finish on hardened rolls
US2367203A (en) * 1941-01-30 1945-01-16 Jacques Rousso Roll holder
US2555319A (en) * 1943-04-19 1951-06-05 Minnesota Mining & Mfg Bead coated tympan sheet
US2490548A (en) * 1945-07-07 1949-12-06 Gen Motors Corp Method of making composite articles
US2499700A (en) * 1947-12-30 1950-03-07 Magnecord Inc Magnetic recording and reproducing apparatus
US2622873A (en) * 1948-02-16 1952-12-23 Fort Howard Paper Co Apparatus for dispensing sheet material from rolls
US2568000A (en) * 1948-07-03 1951-09-18 Claude M Gunn Sound recording and reproducing apparatus
CH317214A (en) * 1951-11-30 1956-11-15 Wilhelm Dr Mueller Process for the production of metallic devices or machine elements which have a wear-resistant surface and are mainly subjected to sliding
US2827389A (en) * 1954-09-07 1958-03-18 Bruce E L Co Method of filling and sanding rotary cut ring porous hardwood
US2920149A (en) * 1957-11-21 1960-01-05 Sonotone Corp Magnetic record transducing heads

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3503108A (en) * 1963-12-31 1970-03-31 Ibm Cutting and sawing blades
DE1280317B (en) * 1965-09-17 1968-10-17 Telefunken Patent Method and device for pressing diamond particles into the surface of a drive shaft for tape-shaped recording media
US3430390A (en) * 1965-12-17 1969-03-04 Whittaker Corp Cutting machines and tools for composite materials
US3524781A (en) * 1966-03-02 1970-08-18 American Can Co Application of thin line adhesive to a sheet using a grooved roll as applicator
US3640027A (en) * 1969-07-25 1972-02-08 Sel Rex Corp Annular cutting blades
FR2440596A1 (en) * 1978-11-02 1980-05-30 Philips Nv DRIVE DEVICE FOR WEB-SHAPED RECORDING CARRIER
US4466564A (en) * 1981-09-14 1984-08-21 Minnesota Mining And Manufacturing Company Belt for belt-driven recording tape pack
US4581189A (en) * 1981-09-14 1986-04-08 Minnesota Mining And Manufacturing Company Method of making a belt for belt-driven recording tape pack
EP0474099A2 (en) * 1990-08-29 1992-03-11 Matsushita Electric Industrial Co., Ltd. Tape driving mechanism for magnetic recording apparatus
EP0474099A3 (en) * 1990-08-29 1993-09-22 Matsushita Electric Industrial Co., Ltd. Tape driving mechanism for magnetic recording apparatus
US5370292A (en) * 1990-08-29 1994-12-06 Matsushita Electric Industrial Co., Ltd. Magnetic tape driving mechanism having a capstan with a surface made of carbon film including diamond-bonded carbons
US5131891A (en) * 1991-02-04 1992-07-21 Gigatek Memory Systems Limited Partnership Highly durable tape cartridge drive belt

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DE1160675B (en) 1964-01-02
FR1231456A (en) 1960-09-29
CH361409A (en) 1962-04-15
NL241654A (en)

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