Variable temperature seal element
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United States of America Patent
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Nov 1, 2016
Issued Date -
N/A
app pub date -
Dec 7, 2012
filing date -
Dec 7, 2011
priority date (Note) -
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Abstract
Devices and methods for fusing materials using a heating element, where the overall mass to be sealed varies along the length of the seal. According to the invention, the heating element has a different profile in different areas. According to some aspects, the thickness and/or cross section of the heating element is different in different areas so that when a current is passed through the heating element, each area heats to a different degree. In some aspects, the heating element is shaped to conform to the shape of the parts to be fused together. The transition between areas of different thickness or cross-sectional area, or between areas of different shape may be sharply defined. This abrupt transition may be created by machining the heating element to a finished shape rather than bending flat stock to shape.
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International Classification(s)
- A61J:CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMA....
- B29C:SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTAN....
- H05B:ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE ....
- H01C:RESISTORS
- B23H:WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRA....
- B29L:INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RE....
- B32B:LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA....
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