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Title: Method of making glass shaving instrument

Abstract: A glass blade is produced from a preform of insoluble glass having a sharp edge encased in soluble glass. The encased preform is heated and drawn to the reduced cross-sectional size desired of the glass blade, cut transversely to length and leached for removal of the soluble glass and exposure of its sharp edge.


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Inventors: Siegmund, Walter P. (Woodstock, CT, US)

Application Number: 594826
Filing Date: 1975-07-10
Publication_date: 1977-03-08
Assignee: American Optical Corporation (Southbridge, MA)
Primary Class(es): 65/31 30/346.53, 30/346.58, 65/61, 76/DIG8
Other Classes:
US Patent Ref:
3805387Apr, 1974Siegmund30/346.
3851392Dec, 1974Donovan30/346.
3861040Jan, 1975Dorio, Jr.30/346.
3926601Dec, 1975Hick, Jr.65/31.

Other Refs:
Primary Examiner: Bashore, S. Leon
Assistant Examiner: Miga, Frank W.
Attorney: Berkenstock, Jr.; H. R., Nealon; William C.