Geometrical instruments – Gauge – Plural tests
Patent
1985-07-05
1986-07-08
Little, Willis
Geometrical instruments
Gauge
Plural tests
33552, 33168R, 33533, G01B 502
Patent
active
045984832
ABSTRACT:
Apparatus and a method for verifying that the various dimensions and shape of the jacket for a floppy disk are correct and within predetermined tolerance ranges. The apparatus of the present invention includes instruments for determining the warpage of the jacket, the parallelism between a pair of primary fold lines of the jacket, the squareness between the first fold line of the jacket and each of the primary fold lines of the jacket, the distance from the central line of the jacket to each of the primary fold lines thereof, the width and depth of a write-enable slot and the distance of the slot to the first fold line of the jacket, the squareness of all four sides of the jacket with reference to each other, and the thickness of the regions of the primary and final fold lines. The method of the present invention comprises a series of steps including the steps of determining the warpage of the jacket, parallelism between the first fold line and each of the primary fold lines, the squareness of each primary fold line with reference to the first fold line, the distance between the central line of the jacket and each of the primary fold lines, the width and depth of the write-enable slot and its distance to the first fold line, the squareness of all four sides relative to each other, and the thickness of the regions of the primary and final fold line areas. Warpage is determined by dropping the jacket through a generally vertical slot, and the other determined with dial gauges or other similar devices.
REFERENCES:
patent: 3102344 (1963-09-01), Herman
patent: 3594909 (1971-07-01), Schultz
patent: 4326336 (1982-04-01), Hreha
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