Method of manufacturing a master intended for the manufacture of

Details Method of manufacturing a master intended for the manufacture of Method of manufacturing a master intended for the manufacture of

1989-06-22

1990-09-11

Hartman, J. J.

Turning

Process of turning

82 11, 82 111, B23B 500, G03B 2160

Patent

active

049559370

ABSTRACT:
A method of manufacturing a master for projection screens, according to which a pattern of parallel rectilinear grooves (31) and ribs (31) is formed on one side of a plate of machinable material by a slotting operation performed by means of a profile chisel. The grooves (33) are formed in several different tooling steps with, several grooves being tooled simultaneously. The profile chisel is of multiple construction and is composed of three subchisels, i.e. a precutting chisel, a cutting chisel (13) and a finishing chisel.

REFERENCES:
patent: 180409 (1876-08-01), Alvord
patent: 2586235 (1952-02-01), Krafft
patent: 3371567 (1968-03-01), Davis
patent: 3994562 (1976-11-01), Holzel
patent: 4233867 (1980-11-01), Zimmerman
patent: 4409869 (1983-10-01), Huddle et al.

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