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1. (WO1984000069) FABRICATION OF OPTICAL CONNECTORS
Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

Cl aims
1. A method of fabricating an optical fiber connector characterized by comprising the steps of:
providing a support assembly comprising an
alignment wire mandrel, a mandrel holder formed around at least a portion of the wire and having an outer surface concentric therewith, a mandrel sleeve located around at least a portion of said wire and holder and having an outer surface concentric therewith, said sleeve including an end surface for receiving a first precision jewel with an aperture therein, at least a portion of which aperture is concentric with the outer surface of the jewel;
inserting said wire through the aperture in said jewel so that a portion of the wire extends therethrough;
forming a backbone insert around a portion of the mandrel sleeve;
inserting the resulting assembly in molding apparatus including a frusto-conical die which includes at one end wall a second jewel with an aperture which
essentially coincides with the axis of the die, the wire being inserted through the aperture in the second jewel;
forming a molded piece-part around the backbone insert and a portion of the first jewel; and
removing the support assembly from the molded part and insert to form a frusto-conical connector including the first jewel at the end surface.
2. The method according to claim 1,
CHARACTERIZED IN THAT
force is applied to the support assembly during molding of the piece-part to keep at least a portion of the surface of the first jewel in intimate
contact with the end wall.
3. The method according to claim 1,
CHARACTERIZED IN THAT
the first jewel forms a precision lapping surface at the end of the connector for removing excess portions of fiber subsequently inserted through the
aperture in the jewel.

OMPI 4/00069
- 1 0 -

4. The method according to claim 2,
CHARACTERIZED IN THAT
one end of the mandrel sleeve is coupled by means of a spring to a cylindrical member, and force is applied to the member during molding.
5. The method according to claim 1,
CHARACTERIZED IN THAT
the material used to form the molded piece-part comprises an epoxy molding compound.
6. The method according to claim 5,
CHARACTERIZED IN THAT
molding is done at a temperature of 121-177 βC for a time of 2-5 minutes.
7, The method according to claim 1,
CHARACTERIZED IN THAT
the apertures in the jewels are flared at the surfaces facing toward the support assembly.
8. The method according to claim 1,
CHARACTERIZED IN THAT
the mandrel sleeve includes a seat into which is placed a third jewel thereby forming the end surface for receiving the first jewel.