Methods of making cutting implements and resulting products

Details Methods of making cutting implements and resulting products Methods of making cutting implements and resulting products

1984-01-18

1987-03-03

Kellogg, Arthur

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65112, 128314, 128315, 128339, 225 965, C03B 3300

Patent

active

046473009

ABSTRACT:
The invention comprises a method of forming cutting blades from solid vitreous material by first placing a mass of molten material into a mold having at least one indentation to cause a ridge to form adjacent to a first surface in the material, cooling the molten material at a rate to preclude internal stresses or other inhomogeneity in the solid material, forming a second substantially flat surface intersecting the ridge area and finally directing fracturing pressure in a controlled direction of force into the material at the second surface in the vicinity of the said ridge in a direction substantially parallel to the first surface whereby a cutting implement is sheared off of the said material.

REFERENCES:
patent: 1551351 (1925-08-01), Wayringer
The Encyclopedia Americana, vol. 25, pp. 746, 747, Oct. 16, 1978.
Washington Post, 1-1-81--Metro Section, "New Use for Ancient Tool".
Science 81, vol. 2, #1, Sep. 1981, pp. 79-80, "A Touch of Glass", J. Schwarz.
OMNI, vol. 4, #4, 1-82--p. 35, Stone Age Scalpels.
Science Digest, vol. 90, #10, 10-82, p. 91, Glass Scalpel Outcuts Steel.
Science News, vol. 124, #6, 8-6-83--p. 93, "Glass Blades".
GEO, vol. 5, #11, 11-83, p. 116, "New Surgical Blades are Based on Ancient Maya Knives".
American Medical News, American Medical Assoc., 11-2-84, pp. 1, 21-24, "New Revolution in the Making".
New Medical Science, 12-84, vol. 1, No. 1, pp. 7, 14, 15, "Obsidian Blades The Cutting Edge of Scalpel Technology".
Breakthrough, The Newsletter of Innovation, by Boardroom Reports, 2-15-85, vol. III, No. 4, p. 3.

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