Self-supporting graduation carrier

Details Self-supporting graduation carrier Self-supporting graduation carrier

1986-01-22

1987-10-20

Stearns, Richard R.

Geometrical instruments

Miscellaneous

Light direction

250231SE, 250233, G01D 534, G01D 536

Patent

active

047004827

ABSTRACT:
A galvano-plastically produced graduation carrier comprising fine perforations located within a perforation zone wherein stability enhancement regions in the form of prominences and depressions in the embodiment are located outside the perforation zone. The stability enhancement regions enhance the ability of the graduation carrier to be self-supporting. The area of the graduation carrier within the perforation zone can therefore be made thinner than other areas of the graduation carrier. This provides a graduation carrier which not only has improved edge sharpness and fineness of the perforations but also a high bending rigidity and improved handleability.

REFERENCES:
patent: 2977480 (1961-03-01), Keene
patent: 3231807 (1966-01-01), Willis
patent: 3770971 (1973-11-01), Somerset
patent: 3843883 (1974-10-01), De Vita et al.
patent: 3965349 (1976-06-01), Jespersen
patent: 4256958 (1981-03-01), Cornwell
patent: 4446367 (1984-05-01), Babsch et al.

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