DE2064294C - Process for the reproduction of magnetic tapes - Google Patents

Description

The landing concerns a method of reproduction of magnetic tapes through direct contact of the magnetic layer surfaces of a main tape and a copy tape by winding both tapes on a spool and applying one Magnetic field. . .

In the usual method for duplicating magnetic tapes, the copy tape is only produced when the master tape is guided in one direction. Therefore it is s.ets necessary to rewind the master tape after copying is finished if the tape is fed in one direction. After the end of "ückwicklung the root Both it is possible vowelfältigen the tape again do it. In this standard. · Type of reproduction of the root volume is the number of Vervielfältigun-BfA *, it is nicLt necessary, the uemau uci l. _S ^& _chl j _e ß _en de duplicate £ s-

ao Siammband door <"of _{the first} duplication

stage ™ haben ^ l ^ - ^ l Therefore, the effective

^g ™ | ^S _p j _t ^U ^ _er duplication doubles, samkeit der Vervieua g _B

example
_A specific design η

^{In the} * 3 ™ * JSw ^ process a volume of the designation according to jenan _{] le yon d> r}

uses that with hooves a ^ ^^ _vidciv . ^ "^ f ^^ e The tape had a feces--

_7θο OeT ^ e ne remaining _Magn; - -800 Ue a ^ ^ ^

Jf ^^^ ₅ magnetic material Ko - 38 μ ^^ ξ ^^^ β from the coil 2 fcütfernt. ^This . ^eS _a ^ ^ta _d ? " ¹ c ^ i _{e 2} withdrawn at one speed and on the bobbin 1 rm _q ^

30 of

ribbons per payment and the host

Coils are alternately wound and unwound, the sets

so "that when winding up a copy tape with 300 GauB.,

the main building the other copy volume according to Ant ™ ^t _v ^ ™ _e

lay off the copying magnetic field, ₅ o 11 ^ from eggs

^Un mÄehenden, an embodiment of the Spule3

^S J ^l ™™ _Naen copy tape

In this unwinding of the _further

gup.g of bands shows. Lnnf S deals with the record-keeping

According to the drawing, the main tape 9 is on ^ko P ^f ^ ^ nn? Ihand 11 wi d back on the reel 4

S57SS rSSÄ ^d t ^d r SS 3A ¹ KSSS ue 2 db wen.ge, a, s das S, a _mm -

S57SS

exactly 2 db wen.ge, a, s that

Take-up reel 2 out, the copy tape II ^ had the main tape.

1 sheet of drawings

Claims (1)

Claim: with the Method for duplicating magnetic tapes by direct contact of the magnetic layer surfaces of a master tape and a copy tape by winding both tapes onto a reel and applying a magnetic field, geke η η ζ calibrated η et by two copy tapes (10, 11) on two supply reels (3, 4), which are alternately wound and unwound during winding and unwinding of the main tape (9) ^ from the reels (1, 2), so that when winding one copy tape (e.g. 11 on reel 12) with the main tape (9), the other copy tape (z. B. 10 of coil 2) is unwound after applying the copying magnetic field (8), and vice ^versa Touched. When _the drawing to the left d Wix further on the Kopieband- ^ _uf J ickeites copy tape About _ew a Fühau ^e _{Q with the} Stammband19 on _le l wound, the Kop.e- master tape ₉ comes into contact. _{au {def bobbin} j _{or 2 closed Kopieb} and 10 or 11 wound up ^ _transferring head 8 and ^ ^ _Zjadmmg shown. It is or 7 copy ^ _copy and 10 or 11 back ^to . ^e ™haben? ™ L _{n 3 or} 4 is wound when aas on the bobbins 3 α a ^ s ^ ^ ^^ Stammbani av ^ _records n provided " _{f di} coil guided, which is a westnt of the inventive method collect with and aurcn