Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1989-12-19
1991-02-26
Smith, James G.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
29603, B24B 100
Patent
active
049951998
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: 3648361 (1972-03-01), Yagi et al.
patent: 4837923 (1989-06-01), Brar et al.
Kanazawa Minoru
Miyoshi Takahito
Okuzawa Yasutoshi
Sugisaki Tsutomu
Yamada Takuzi
Fuji Photo Film Co. , Ltd.
Smith James G.
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