US2385595A - Method of and device for producing sound band matrices - Google Patents

Method of and device for producing sound band matrices Download PDF

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Publication number
US2385595A
US2385595A US395317A US39531741A US2385595A US 2385595 A US2385595 A US 2385595A US 395317 A US395317 A US 395317A US 39531741 A US39531741 A US 39531741A US 2385595 A US2385595 A US 2385595A
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United States
Prior art keywords
band
matrix
sound
thickness
patrix
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Expired - Lifetime
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US395317A
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English (en)
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Woitscheck Arno
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Individual
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/68—Record carriers
    • G11B3/70—Record carriers characterised by the selection of material or structure; Processes or apparatus specially adapted for manufacturing record carriers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S29/00—Metal working
    • Y10S29/028—Magnetic recording digest
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49885—Assembling or joining with coating before or during assembling

Definitions

  • This manner of producing pressing or stamping matrices has the disadvantage of taking up much time and being rather expensive, particularly when it is the question of producin broad sound band matrices with a number of sound tracks running at the sides of each other. It requires a comparatively long time until the matrix has acquired the necessary thickness in the galvanic bath.
  • the original matrix for first making a patrix from which one or several pressure-resisting matrices are produced for the pressing or stamping operation.
  • the patrix is produced in a galvanic bath, the original matrix serving as a cathode.
  • the width of the patrix will be still smaller than the already considerably reduced width of the original matrix.
  • the same disadvantage occurs when the matrix, intended to serve for the pressing or stamping operation, is produced from the patrix.
  • the object of the invention is to obviate these as well as other disadvantages of the known method.
  • This is achieved, in the first place, by producing the matrix or patrix band in the galvanic bath so as to have a width only slightly exceeding the width of the sound track bundle and a thickness amounting to merely a fraction of the required thickness, the band obtained in this manner-4f necessary, after having its edges worked-being inserted in an unrecorded wider metal band the edge portions of which have the desired thickness of the matrix or patrix, and the central portion of which is provided with an opening corresponding to the cross section of the in the manufacture of gramophone records consisting in soldering a very thin disc-shaped pressing or stamping matrix, with a thickness of only a few tenths of a millimeter, onto a thick metal plate, in order to protect the matrix against certain influences .of the plate material employed, as well as against careless handling by the operator.
  • the method is advantageously carried out in a manner in which the matrix or patrix band is produced in the galvanic bath so as to have a thickness equal to one half of that required, in
  • the invention provides that an original matrix is inserted'in a widening band of the type described, the recorded side of the composed band obtained in this manner being coated with an,
  • the narrow recorded matrix or patrix band is continuously Ied'to a uniformly moved, heated widening band, at the same time applying to its recorded side a protective coating preventing it from tarnishing, and its back being coated with a soldering paste, both bands being pressed together from the place where they first come intocontact with each other.
  • This part of the method is preferably carried out by means of an arrangement which is provided with a device for continuously folding the edge portions of a uniformly moved, unrecorded band, a device for uniformly feeding and inserting the narrow recorded matrix or patrix band in the channel formed by the folded edge portions of the unrecorded band, a heating ,device for the unrecorded band disposed between the folding device and the place where the recorded band is fed in, and a device for pressing together the two combined hands behind the f ceding-in place.
  • the device for feeding" the recorded band may be provided with elements serving to apply a protective paste to the recorded sideof the band, and with elements for applying soldering flux to the back of the band.
  • the device for pressing the bands together behind the feeding-in place of the recorded band advantageously consists of individual spring-controlled rollers.
  • Fig. 1 shows a plan view and a section of a' piece of a recorded original sound band
  • Fig. 2 is a plan view and a section of the original matrix produced from the sound band according to Fig. 1 after the original sound band has been separated;
  • Fig. 3 also shows a plan view and a section of the trimmed original matrix.
  • Fig. 4. is a plan view and a section of a piece of a widening band.
  • Fig. 5 is a plan view and a section of the widen ing band according to Fig. 4 with the insertedoriginal matrix according to Fig. 3 and Fig. 6 illustrates the device for inserting the original matrix in the widening band and for producing the latter.
  • the original sound band for example, consists of a. nitrocellulose band I coated with a wax layer 2 into which are cut the sound grooves 3. After having been recorded, the band is coated with graphite, or its recorded side is provided with some other conductive coating. Thereupon the band is placed in a galvanic bath, the conductive coating of its recorded side being connected to the source of current of the bath. For this purpose, there are provided the indicated clamping devices 4 which pass beyond the edge of the conductive surface layer.
  • the copper deposit which is now produced in the galvanic bath, forms a matrix between the clamping devices 4 on the graphite-coated surface of the original sound band, the deposit-- forming operation being continued until the thickness of the matrix has reached one half of i the thickness required. Then, the matrix is drawn has already lost considerably in width as compared with the width of the wax layer of the original sound band. Its width has been reduced by the galvanizing operation as well as by the working of its edges as compared with the waxlayer 2 of the carrier layer I of the original sound band. If the matrix according to Fig. 3 should be used to galvanically produce a patrix. and if a matrix would be made of this patrix, the width of the last mentioned matrix would be coniderably smaller than that of the original matrix.
  • the invention provides for the use of a widening band.
  • a piece of such a band is illustrated in Fig. 4. It consists of a smooth copper band 8, whose edge portions 9 are folded over.
  • the band 8 has the same thickness as the matrix Saccording to Fig. 3 and, therefore, in its central portion 'has half the thickness, and in its edge portions the full thickness of the matrix band to be produced.
  • the matrix 5 is inserted, with the sound record side out, in the opening formed by the folded edges 9 of the widening band 8, where upon the back of the matrix is soldered on to the bottom of the opening.
  • Fig 5 By the one-piece connection a matrix band is produced'which has the desired thickness and a considerably greater width than the galvanically produced matrix band 5. Nevertheless, only a part of the entire matrix needs to be produced galvanically.
  • the composite matrix according to Fig, 5 is now provided on its recorded side with an oxide layer, for example by silvering the recorded side and subsequently oxidizing the silver layer in a bath consisting of a solution of iodine and bromine in alcohol. Thereupon the matrix is again brought into the galvanic bath and a patrix is produced therefrom, which, after having beenv cut at its edges, is also narrower than the matrix;-
  • the patrix is inserted in the manner described above in a widening band according to Fig. 4 and is soldered on to this band.
  • the total patrix widv ened in this way is again coated on its recorded side with an oxide layer and is brought into the galvanic bath, in which a matrix is produced therefrom.
  • This matrix is then wide enough to be used for pressing or stamping sound bands.
  • the pressing or stamping matrix is produced in the galvanic bath either in full thickness or in a fraction of this thickness, in which case it is attached to a band having the missing thickness of the matrix.
  • the pressing matrix is nickeled and chromed and is then ready for use.
  • the matrix band is inserted through the. rollers 2
  • the bands 5 and 8 are rigidly connected with each other.
  • the cross section or the combined band system is illustrated at 26.
  • the device illustrated in Fig. 6 is used in a similar manner for patrix band in a widening band.
  • the invention is not limited to inserting a galvanically produced matrix or patrix band, of the matrix or patrix to be produced, in a widening band the central portion of which has the same thickness as the galvanically produced matrix or patrix band; as it is also possible to galvanically produce a matrix or patrix band whose thickness represents a difierent fraction of the total thickness required, and this band may be inserted in a widening band whose edge portions have the required total thickness 01' the matrix or patrix, and whose central portion has an opening, the depth of which is equal to the thickness or the galvanically produced matrix 01' patrix band.
  • both matrix and patrix bands may be made in this way, capable of use for the production of either patrices or matrices (including the actual reproduction records themselves), the product is herein referred to as a composite reproducing band having a duplicating portion and a widening portion.
  • a method oi making widened composite reproducing bands for the production of sound record bands by means of a galvanoplastic deposit which comprises preparing a duplicating band from an original record band, said duplicating band having a width slightly greater than the width of the sound track portion oi the or- ,iginal record band and with a thickness less than the required thickness for the reproducing band to be made, preparing a wider conductive band having edge portions of the thickness dereproducing band and having a inserting and connectingtli 3 central portion with a longitudinal recess corresponding to the cross-section of the said duplicating band, and then securing the duplicating band in position in said recess with its upper surface in the plane or the said edge portions.
  • a method of making widened composite reproducing bands for the production oi. sound record bands by means of a galvanoplastic deposit which comprises preparing a duplicating band from an original record band, said duplicating band having a width slightly greater than the width of the sound track portion or the original record and with a thickness less than the required thickness for the reproducing band to be made, turning the edges of a wide metal band over to provide edge portions of the thickness desired for the reproducing band, while leaving a gap between the edges of the original blank for providing a longitudinal recess corresponding to the cross-section oi the said duplicating band, and
  • a method of making producing bands for the production or sound record bands by means 01' a galvanoplastic deposit which comprises preparing a duplicating band from an original record band, said duplicating band having a width slightly greater than the width of the sound track portion of the original record band and with a thickness less than the required thickness for the matrix or patrix tobe made, preparing a wider conductive band having edge portions of the thickness desired for the duplicating band and having a central portion with a longitudinal recess corresponding to the cross-section of the said duplicating band, advancing the conductive band and heating it during its advancement, coating the duplicating band on its face with a protective coating and on its back with a solder paste while continuing to advance the same, advancing the duplicating band and bringing it face up into the recess 01' the widening band while the latter is in heated condition, and pressing the hands together while continuing their advance at the same speed.
  • a composite reproducing band of desired width and having a mechanical sound record thereon comprising a duplicating portion bearing the sound record, and a relatively wider band widened composite rehaving a central longitudinal recess of crosssection identical with thatoi' the duplicating portion, said portion and the wider band being secured fixedly together throughout their lengths and providing a flexible article for preparing duplicates of thedesired width.

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US395317A 1940-05-23 1941-05-26 Method of and device for producing sound band matrices Expired - Lifetime US2385595A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET53787D DE746221C (de) 1940-05-23 1940-05-23 Verfahren und Einrichtung zum Herstellen von Schallbandmatrizen bzw. -patrizen

Publications (1)

Publication Number Publication Date
US2385595A true US2385595A (en) 1945-09-25

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Application Number Title Priority Date Filing Date
US395317A Expired - Lifetime US2385595A (en) 1940-05-23 1941-05-26 Method of and device for producing sound band matrices

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US (1) US2385595A (de)
CH (1) CH226049A (de)
DE (1) DE746221C (de)
FR (1) FR872313A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2569058A (en) * 1947-09-25 1951-09-25 Ranco Inc Method of forming berylliumcopper alloy bellows
US2683472A (en) * 1949-04-09 1954-07-13 Harry G Specht Method of manufacturing perforated metallic tape from wire
US2738317A (en) * 1953-04-28 1956-03-13 Daniel Karl Method of producing stamping positives for mechanical pick up sound tapes
US2817112A (en) * 1949-10-24 1957-12-24 Daniel Karl Device for sound recording
US3787057A (en) * 1969-03-31 1974-01-22 Cailliot Serge Tape recorder utilizing resilient tape and cartridge having no moving parts

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE938630C (de) * 1952-11-11 1956-02-02 Tefi Appbau Dr Daniel K G Verfahren zum Herstellen von mit einer Fuehrungsrille versehenen endlosen, zu einem Wickel aufgerollten Magnettonbaendern

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB330501A (en) * 1929-02-07 1930-06-10 Reginald Percy Thorogood Improvements in or relating to the making of matrices for use in the manufacture of sound records

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2569058A (en) * 1947-09-25 1951-09-25 Ranco Inc Method of forming berylliumcopper alloy bellows
US2683472A (en) * 1949-04-09 1954-07-13 Harry G Specht Method of manufacturing perforated metallic tape from wire
US2817112A (en) * 1949-10-24 1957-12-24 Daniel Karl Device for sound recording
US2738317A (en) * 1953-04-28 1956-03-13 Daniel Karl Method of producing stamping positives for mechanical pick up sound tapes
US3787057A (en) * 1969-03-31 1974-01-22 Cailliot Serge Tape recorder utilizing resilient tape and cartridge having no moving parts

Also Published As

Publication number Publication date
FR872313A (fr) 1942-06-04
DE746221C (de) 1945-01-25
CH226049A (de) 1943-03-15

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