Record disc cutting stylus

Details Record disc cutting stylus Record disc cutting stylus

1975-10-30

1977-07-05

Stephan, Steven L.

Undertaking

G11B 344

Patent

active

040335925

ABSTRACT:
A record disc cutting stylus comprises a cutting stylus body which is held at its upper end by a shank. At its lower end, there is a stylus tip portion which has a mirror surface, a relief surface with a relief angle .gamma., and a burnishing facet with a burnishing angle .beta. and a burnishing facet width d. The burnishing angle .beta. is as large as possible, and the width d and the relief angle .gamma. are as small as possible. The stylus projects distance l between the lower end face of the shank and the extreme tip of the stylus tip portion, which projection is as small as possible. The burnishing angle .beta. has a value substantially within a range of 25.degree. to 40.degree.; the burnishing facet width d is substantially within a range of 0.5 .mu.m to 3.0 .mu.m; the relief angle .gamma. is substantially within a range of 30.degree. to 40.degree.; and the stylus projecting distance l is substantially less than 2.0 .mu.m.

REFERENCES:
patent: 2018496 (1935-10-01), Keller
patent: 2530284 (1950-11-01), Capps et al.
patent: 2627416 (1953-02-01), Schoemehl et al.

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