Invention Grant
- Patent Title: Process for manufacturing low temperature sealing glasses
- Patent Title (中): 制造低温密封眼镜的工艺
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Application No.: US49501474Application Date: 1974-08-05
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Publication No.: US3904426APublication Date: 1975-09-09
- Inventor: FRIESER RUDOLF G , POWELL JIMMIE L , TUMMALA RAO R
- Applicant: IBM
- Assignee: Ibm
- Current Assignee: Ibm
- Priority: US49501474 1974-08-05
- Main IPC: C03B5/00
- IPC: C03B5/00 ; C03C3/074 ; C03C8/10 ; C03C8/24 ; C03C3/10
Abstract:
A process for manufacturing a sealing glass composition consisting essentially of the following ingredients in the following proportions:
The process comprises the steps of providing the batch of ingredients to the above proportions and insuring a full mixture or mixing of the same. Thereafter, in one embodiment of the process, the batch may be heated to between 750 and 850*C to form a liquid melt and then the liquid melt is further heated until the temperature is 1,100 + OR - 20*C. The temperature of the melt is held between the aforementioned limits for a period of at least 3 hours and no longer than 3 1/2 hours, and thereafter the temperature of the melt is lowered to effectively inhibit bubbling of the liquid melt, and then the melt is removed for further processing.
The process comprises the steps of providing the batch of ingredients to the above proportions and insuring a full mixture or mixing of the same. Thereafter, in one embodiment of the process, the batch may be heated to between 750 and 850*C to form a liquid melt and then the liquid melt is further heated until the temperature is 1,100 + OR - 20*C. The temperature of the melt is held between the aforementioned limits for a period of at least 3 hours and no longer than 3 1/2 hours, and thereafter the temperature of the melt is lowered to effectively inhibit bubbling of the liquid melt, and then the melt is removed for further processing.
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