Fiber forming bushing construction

In apparatus for heat-softening and attenuating material into fibers, an electrical resistance bushing comprising:

• a horizontally positioned base plate having a plurality of fiber forming apertures extending therethrough;
• spaced-apart side walls joined to said base plate and extending upwardly therefrom;
• a top wall provided with a material receiving opening interconnecting said side walls;
• opposed end walls interconnecting said base plate and said side walls;
• and
• hollow core means extending through the interior of said bushing for directing a fluid medium therethrough;
• wherein said base plate is dimensioned with an average thickness at least eight times greater than the average thickness of each side wall over at least fifty percent of the height of the side wall measured along an upper portion thereof for the length of the side wall.

In apparatus for heat-softening and attenuating material into fibers, an electrical resistance bushing mounted in a frame comprising:

• a horizontally positioned base plate having aperture means for fiber-forming extending therethrough;
• spaced-apart side walls joined to said base plate and extending upwardly therefrom;
• a top wall provided with an opening interconnecting said side walls adjacent their upper portion;
• and
• opposed end walls interconnecting said base plate and said side walls, each of said end walls including a terminal extending therefrom;
• said base plate being dimensioned with an average thickness at least eight times greater than the average thickness of an upper section of each side wall over at least fifty percent of the height of the side wall measured along the length of the side wall, said base plate also being dimensioned with an average thickness at least eight times greater than the average thickness of said top wall.

In apparatus for heat-softening and attenuating material into fibers, an electrical resistance bushng mounted in a frame comprising:

• a horizontally positioned base plate having aperture means for fiber forming extending therethrough;
• spaced-apart lower side wall sections joined to said base plate extending upwardly and inclined outwardly therefrom;
• spaced-apart upper side wall sections extending from each lower side wall extending upwardly and inclined toward the bushings longitudinal axis;
• a top wall provided with a material receiving opening interconnecting said upper side wall sections;
• funnel means mounted adjacent said top wall for directing the material into said bushing;
• cooling means provided adjacent the bottom portion of said funnel means for maintaining a temperature, adjacent said opening, which will prevent the material from adhering and accumulating in a region adjacent its entry through said opening;
• and
• opposed end walls interconnecting said base plate and said side wall sections, each of said end walls including a terminal extending therefrom.