Coating continuous filaments
First Claim
Patent Images
1. A method for coating a continuous fiber comprising:
- passing the fiber into and out of a fluid filled container through upper and lower constricted openings with the fluid level of the coating within the container maintained between the upper and lower openings, while maintaining a reduced pressure within the container by evacuating the space above the coating fluid, the lower constricted opening restricting the flow of coating fluid from the container and the upper constricted opening allowing entry of the continuous fiber into the container while combining with the fiber to produce a partial pressure seal.
0 Assignments
0 Petitions
Accused Products
Abstract
In conventional processes for coating continuous filaments the filament is handled by various mechanical means such as, rollers, pulleys, etc. In the manufacture of, for example, optical fibers, such handling causes unacceptable mechanical damage to the fiber. Mechanical contact of the fiber being manufactured can be avoided by passing the fiber through a capillary wetted with a curable coating liquid. The flow of the coating liquid through the capillary is limited by reducing the pressure of the ambient above the liquid level within the vessel containing the coating liquid.
-
Citations
8 Claims
-
1. A method for coating a continuous fiber comprising:
passing the fiber into and out of a fluid filled container through upper and lower constricted openings with the fluid level of the coating within the container maintained between the upper and lower openings, while maintaining a reduced pressure within the container by evacuating the space above the coating fluid, the lower constricted opening restricting the flow of coating fluid from the container and the upper constricted opening allowing entry of the continuous fiber into the container while combining with the fiber to produce a partial pressure seal. - View Dependent Claims (2, 3, 4, 5)
-
6. A method for coating a continuous fiber comprising:
passing the fiber in a vertical downward direction sequentially through a first container, through a constriction joining the first container with a second container, through the second container, and through a constricted opening in the second container, while maintaining a positive pressure within the second container and coating fluid within the first container, the positive pressure combining with the constriction between the containers and the fiber to restrict the flow of coating fluid between the containers and the constricted opening in the second container combining with the fiber to produce a partial pressure seal in the second container. - View Dependent Claims (7, 8)
Specification