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US 5,330,695 AGranted
Method of manufacturing diaphrams for dynamic microphones
AssigneeShure Brothers, Inc.
InventorCharles E. Seeler
Life of this patent
Estimating the term…
Abstract
A diaphragm for microphones having a laminate structure which imparts damping characteristics to the diaphragm is disclosed. The laminate comprises upper and lower resilient layers composed of a plastic film. The upper and lower layers constrain a center layer composed of an elastomeric material having a high dissipation of vibratory shear motion. Manufacturing techniques for making such diaphragms are disclosed.
Claims8
A method of manufacturing diaphragms comprising the steps of:
- (a) applying a solution of uncured rubber to a first sheet of plastic film and allowing said rubber solution to dry to form a rubber layer;
- (b) applying a second sheet of plastic film to said rubber layer to form a laminar structure with said first sheet of plastic film;
- (c) compressing said laminar structure at a temperature and pressure and for a period of time sufficient to permit said uncured rubber to spread evenly between said first and second plastic sheets to a desired thickness without curing said rubber;
- (d) punching blanks from said laminar structure;
- (e) pressing said blanks in a mold having a predetermined contour at a temperature and pressure sufficient to cure said rubber thereby imparting a predetermined shape to said blanks;
- and
- (f) releasing said blanks from said mold.
4 more elements
A method of manufacturing diaphragms comprising the steps of:
- (a) dispensing first and second sheets of plastic film from reels of said plastic film;
- (b) applying a solution of uncured rubber to at least one of said first and second sheets of plastic film and allowing said solution to dry to form a rubber layer;
- (c) forming a laminar structure of said sheets of plastic film with said rubber layer between said first and second sheets;
- (d) compressing said laminar structure at sufficient temperature and pressure and for a period of time sufficient to permit said uncured rubber to spread evenly between said first and second plastic sheets to a desired thickness without curing said rubber;
- (e) punching blanks from said laminar structure;
- (f) pressing said blanks in a mold having a predetermined contour at a temperature and pressure sufficient to cure said rubber, thereby imparting a predetermined shape to said blanks;
- and
- (g) releasing said blanks from said mold.
5 more elements
Dependencies are inferred from the claim text.