Process for producing dielectric optical waveguides

Patent 4154783 Issued on May 15, 1979. Estimated Expiration Date:

July 25, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Method of extruding foamed plastic sheathed pencils
Patent #: 3936519
Issued on: 02/03/1976
Inventor: Crystal

Methods of making continuous length reinforced plastic articles
Patent #: 3993726
Issued on: 11/23/1976
Inventor: Moyer

Method for forming a sheathed electrical cable Patent #: 4017579
Issued on: 04/12/1977
Inventor: Roe , et al.

Inventor

Jackson, Lynden A.

Assignee

The Post Office

Application

No. 05/818719 filed on 07/25/1977

US Classes:

264/1.29, Extruding (i.e., die)264/171.23, Shaping of polyamide (e.g., nylon, etc.) or addition polymer of at least one monoethylenically unsaturated monomer (e.g., polyethylene, polypropylene, polystyrene, etc.) containing layer on preform264/210.1, And reshaping264/235, Annealing264/235.6, After stretching running or indefinite length work264/288.8Nonuniform product (e.g., porous, etc.) or with tensioning before application of heat

Examiners

Primary: Woo, Jay H.

Attorney, Agent or Firm

Kemon & Estabrook

International Classes

B29C 55/00 (20060101)
B29C 55/22 (20060101)
B29C 47/08 (20060101)
B29C 47/02 (20060101)
B29C 47/28 (20060101)
B29C 47/20 (20060101)
B29C 47/88 (20060101)
B29D 11/00 (20060101)
C03C 25/18 (20060101)
C03C 25/10 (20060101)
C03C 25/12 (20060101)
G02B 6/44 (20060101)

Foreign Application Priority Data

1975-05-14 GB

Abstract

A method of coating a fibre in which a sleeve of polymer is extruded, fibre is fed into the sleeve as it is formed, and the diameter of the sleeve is reduced by a drawing process to produce a sleeve of polymer which loosely envelops the fibre. We also provide a fibre having a tubular sleeve of polymer, the sleeve having its molecules orientated to lie longitudinally with respect to the axis of the fibre. The sleeve has relative strength in a longitudinal plane and relative weakness in a transverse plane.