Invention Grant
- Patent Title: Bushing for producing glass fibers and method for producing glass fibers
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Application No.: US18287397Application Date: 2022-03-10
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Publication No.: US12054417B2Publication Date: 2024-08-06
- Inventor: Hideo Segawa , Jumpei Suzuki , Shigekazu Onozumi
- Applicant: TANAKA KIKINZOKU KOGYO K.K.
- Applicant Address: JP Tokyo
- Assignee: TANAKA KIKINZOKU KOGYO K.K.
- Current Assignee: TANAKA KIKINZOKU KOGYO K.K.
- Current Assignee Address: JP Tokyo
- Agency: Foley & Lardner LLP
- Priority: JP 21073632 2021.04.23
- International Application: PCT/JP2022/010453 2022.03.10
- International Announcement: WO2022/224612A 2022.10.27
- Date entered country: 2023-10-18
- Main IPC: C03B37/095
- IPC: C03B37/095

Abstract:
A bushing for producing glass fibers, including: a plurality of nozzles made of platinum or the like to discharge molten glass; and a base plate made of platinum or the like. A coating layer is preferentially formed on an outer circumferential face on a tip part on the side of glass discharge of the nozzle, and a width of the coating layer is 5% or more and 95% or less with respect to the entire length of the nozzle. The base plate includes a non-coating area. Areas of the nozzles and the base plate not provided with the coating layer act as a sacrificial metal for protecting the nozzle tip parts. In consideration of the sacrificial metal, a coverage rate P of the coating layer on the nozzle tip parts calculated with a prescribed equation is preferably 5% or more and 350% or less.
Public/Granted literature
- US20240083801A1 BUSHING FOR PRODUCING GLASS FIBERS AND METHOD FOR PRODUCING GLASS FIBERS Public/Granted day:2024-03-14
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