Multi-level sealing method
AssigneeWeed Instrument Company, Inc.
InventorsFelora Derakhshani, Ricky Gotcher
Life of this patent
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Abstract
A multi-level sealing method wherein an electrical element to be sealed is heated. Once heated, a quick curing first seal is applied to the electrical element thereby preventing the introduction of moisture, and other elements, into an electrical element as the seal cures. A second seal is applied, over the first seal and the element, that is high temperature and slow curing. As a result, the second seal has a different grain structure and the likelihood of a common moisture path into the electrical element is substantially eliminated. Therefore, once the high temperature, slow curing, second seal has cured, the reintroduction of moisture into the electrical element is prohibited. Additional layers of sealant may be added, if desired.
Claims12
A multi-level sealing method comprising the steps of:
- A. heating an element to be sealed until moisture is absent;
- B. applying a quick curing first sealant means to said element;
- C. allowing said first sealant means to cure;
- D. applying a high temperature, slow curing second sealant means over said first sealant means;
- E. reheating said element and said second sealant means;
- and
- F. allowing said second sealant means to slowly cure so that a multi-level seal is provided.
A multi-level sealing method comprising the steps of:
- A. heating an element to be sealed;
- B. testing said element to ensure moisture is absent;
- C. selecting an epoxy means that adheres to metal, plastics, and ceramics;
- D. mixing said epoxy means with a curing catalyst so that a resultant first sealant means cures quickly at room temperature and more quickly when heated;
- E. applying said first sealant means to said heated elements so that said element is sealed before moisture is drawn past said first sealant means into said element;
- F. selecting a high temperature epoxy means that adheres to metals, plastics, and ceramics;
- G. mixing said high temperature epoxy means with a curing catalyst so that a resultant second sealant means cures slowly at high temperature;
- H. applying said second sealant means over said first sealant means so that two sealant boundaries are formed and any moisture that passes said second sealant means is prevented from entering said element by said first sealant means;
- I. retesting said element to ensure moisture is still absent.
Dependencies are inferred from the claim text.