Method of producing a tape guide device of a rotary head type vi

Details Method of producing a tape guide device of a rotary head type vi Method of producing a tape guide device of a rotary head type vi

1982-05-18

1984-07-10

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Head accessory

360 84, G11B 1560, G11B 508

Patent

active

044596278

ABSTRACT:
A tape guide device of a rotary head type video tape recorder of the helical scanning system including a shoulder portion formed on an outer circumferential surface of a lower stationary cylindrical portion cooperating with an upper rotary cylindrical portion and constituting a head cylindrical drum for guiding a magnetic tape. The shoulder portion has, in a section thereof with which the magnetic tape is not brought into contact, a configuration consisting of a plurality of parabolic lines connected to one another. Alternatively, the offset portion may have a configuration consisting of curves which are such that their second differential coordinates are continuous over the entire circumference of the head cylindrical drum with respect to the fixed coordinate system disposed on the outer circumferential surface of the head cylindrical drum, or the shoulder portion may have a configuration consisting of curves which are such that the absolute value of the maximum value of the second differential coefficients is not equal to the absolute value of the minimum value thereof.

REFERENCES:
patent: 3363065 (1968-01-01), Tanigawa
patent: 3840895 (1974-10-01), Kubo
patent: 3930270 (1975-12-01), Tanigawa
patent: 4163266 (1979-07-01), Tamamura et al.

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