Method of making a catch for jewelry clasp
AssigneeDo-All J.M.C. Inc.
InventorDonald J. Sobin
Life of this patent
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Abstract
A catch for a jewelry clasp is disclosed which is formed from a single strip of dual thickness metal. A pushing member, having a second thickness which is preferably around three times the thickness of the first thickness portion of the tongue, is pressed to release the catch from a clasp to allow a wearer to remove an article of jewelry. Also disclosed is a method of making the catch where a dual thickness blank is formed by pressing a single thickness starting blank with a series of dies. A second method of making the catch is disclose where dual thickness blanks are cut from a ribbon of dual thickness metal stock.
Claims8
A method of making a dual thickness catch for a clasp from a sheet of stock material having a first thickness portion and a second thickness portion, said second thickness portion having a greater thickness than said first thickness portion, said method comprising the steps of:
- cutting a strip of material from the sheet of stock material to obtain a dual thickness trip in the form of a substantially flat blank said strip thereby having a first thickness part and a second thickness part being unitary and being demarcated by a transverse transition area, said second thickness part being thicker than said first thickness part, said first thickness part defining a first stripend and said second thickness part defining a second strip end;
- bending said first thickness part at an area of said first thickness part intermediate of said first strip end and said transverse transition area to form a substantially V-shaped tongue with a bend, said V-shaped tongue having an underlying portion extending in a direction from said first strip end toward said bend and an overlying portion extending in a direction from said bend toward said transverse transition area;
- and
- bending said second thickness part relative to said first thickness part at said transverse transition area to form a pushing member that extends substantially perpendicular to said overlying portion of said V-shaped tongue and extends away from said underlying portion of said V-shaped tongue.
Dependencies are inferred from the claim text.