Abstract A bushing block screen and bushing assembly is described which involves the positioning of a flow block, a bushing block and a glass fiber bushing adapted to produce glass fibers at the bottom thereof in the floor of a glass furnace forehearth. The bushing block is provided with a screen covering the surface area of an internal canal provided in the bushing block. The bushing block canal communicates with a similar canal of similar dimension positioned in the flow block and the top of a fiber glass bushing. The screen is positioned near the bottom of the bushing block and the bushing block canal is lined with precious metal, preferably platinum, or a platinum alloy and is further provided with a platinum flange at the top and the bottom thereof where the bushing block contacts the flow block and the bushing respectively.
Inventors
👤 R Shealy
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-05 14:32
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/08; C03B37/083
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
130 words
A bushing block for placement above a glass fiber forming bushing comprising a generally rectangular, insulated block member having a rectangular central canal throughout the depth thereof, a platinum containing liner covering the walls of said canal, an upper platinum containing flange covering at least a portion of the top of said bushing block, a platinum containing flange covering a portion of the bottom of said bushing block, a platinum containing screen positioned across the lower portion of said bushing block and in said canal so that glass must pass therethrough to reach the bottom of said bushing block, said screen being located substantially below the top of said bushing block and slightly above the bottom thereof, and means to receive a bushing at the bottom of said bushing block.
Claim 2
Dependent Claim
19 words
The apparatus of claim 1 wherein said liner flanges and bushing are constructed of a platinum - rhodium alloy.
Claim 3
Dependent Claim
33 words
The apparatus of claim 2 wherein the bushing block liner is a platinum - rhodium alloy wherein said flanges are a platinum -rhodium alloy and said screen is a platinum - rhodium alloy.
Claim 4
Dependent Claim
19 words
The apparatus of claim 1 wherein said platinum - rhodium alloy is 80 percent platinum and 20 percent rhodium.
Claim 5
Dependent Claim
27 words
The apparatus of claim 2 wherein the platinum containing liners, flanges and screen are a platinum - rhodium alloy having 80 percent platinum and 20 percent rhodium.