Magnetic tape cassette having improved guide pole structure

Details Magnetic tape cassette having improved guide pole structure Magnetic tape cassette having improved guide pole structure

1988-06-13

1990-05-29

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record medium

In container

36013021, 226196, 242199, G11B 2302

Patent

active

049300326

ABSTRACT:
A magnetic tape cassette having a guide pole which is in sliding contact with the magnetic surface of the tape produced in such a manner as to improve the running characteristics of the tape while being capable of being manufactured at a low cost. A cylindrical stainless steel base member is subjected to a barreling treatment so as to secure fine particles of an inorganic material having a Moh's hardness of greater than 9 to the slide surface of the guide post. Moreover, the surface of the guide pole can be finished by a surface rolling to reduce the number of scratch-like grooves in the slide surface having a depth of more than 0.2 .mu.m and a width of less than 40 .mu.m to less than 11 per millimeter in the sliding direction of the tape.

REFERENCES:
patent: 4389010 (1983-06-01), Oishi
patent: 4437222 (1984-03-01), Umehara

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