Copying apparatus for copying a magnetic pattern from a master m

Details Copying apparatus for copying a magnetic pattern from a master m Copying apparatus for copying a magnetic pattern from a master m

1988-06-17

1989-11-21

Faber, Alan

Dynamic magnetic information storage or retrieval

Record copying

Contact transfer

360 17, G11B 586

Patent

active

048826375

ABSTRACT:
A copying apparatus (1) for copying a magnetic pattern from a master magnetic tape (5) on a duplicate magnetic tape (6) comprises two facing elongate platens (9, 10) having mutually parallel gap sides (9A, 10A) which bound a gap (13). Copying means (20) are provided to promote the signal transfer from the master to the duplicate magnetic tape. In the gap sides (9A, 10A) of the platens (9, 10) passages (18) are arranged, through which passages a pressurized fluid is fed into the gap (13), so that the tapes are intimately pressed against one another inside the gap (13). In the gap sides (9A, 10A) expulsion means (16A, 10E, 10K, 23) are provided to expel air present between the tapes, the expulsion means in each gap side, in a view at the gap side, being arranged in at least one V-shape having an axis of symmetry which extends substantially parallel to the longitudinal direction of the platens (9, 10), at least a number of the passages being situated within the outline of the V-shape.

REFERENCES:
patent: 3161120 (1964-12-01), Timares et al.
patent: 3472971 (1969-10-01), Van Den Berg
patent: 3544732 (1970-12-01), Bauer
patent: 3573390 (1971-04-01), Frost
patent: 3752925 (1973-08-01), Smaler
patent: 3762619 (1973-10-01), Leavitt et al.
patent: 3813688 (1974-05-01), Dolby et al.
patent: 4698700 (1987-10-01), Shirai

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