| US 7,533,543 B2 | ||
| Reinforcing device for bushing used to produce filaments, such as glass-based filaments | ||
| Jean-Pierre Renaudin, St-Sulpice (France); and Jean-Louis Thiriet, Chambery (France) | ||
| Assigned to Saint-Gobain Technical Fabrics Europe, Chambery (France) | ||
| Appl. No. 10/544,742 PCT Filed Feb. 04, 2004, PCT No. PCT/FR2004/000255 § 371(c)(1), (2), (4) Date Apr. 24, 2006, PCT Pub. No. WO2004/074195, PCT Pub. Date Sep. 02, 2004. |
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| Claims priority of application No. 03 01851 (FR), filed on Feb. 12, 2003. | ||
| Prior Publication US 2006/0201207 A1, Sep. 14, 2006 | ||
| Int. Cl. C03B 5/00 (2006.01) | ||
| U.S. Cl. 65—495 [65/499; 65/492; 65/494; 373/28] | 20 Claims |
| 1. A reinforcement device, for a bottom of a bushing having a multitude of holes from which filaments are drawn, comprising:
a reinforcement piece that comprises a hollow first part defining at least one receiving housing;
a second part that extends at least partly over a length of the hollow first part;
at least one stiffener in the receiving housing of the hollow first part having a cross section substantially identical to
an internal cross section of the hollow first part; and
a refractory additional material placed in the receiving housing of the hollow first part between the stiffener and internal
walls of the hollow first part thereby sealing remaining spaces between the internal walls and the stiffener.
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