METHOD FOR MOLDING THIN-WALLED SPIRAL TUBE FOR USE WITH ENDOSCOPE
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United States of America Patent
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Issued Date -
Jan 19, 2023
app pub date -
Sep 20, 2022
filing date -
Sep 20, 2022
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Abstract
A method of molding a polymeric device having an elongated tube and a spiral fin. The method including: injecting a liquid resin into a mold space defining the polymeric device, the mold space having an elongated hollow tube molding space and a spiral fin molding space wound around the elongated hollow tube molding space; and providing a longitudinal flow path in at least a portion of a longitudinal length of the elongated tube molding space, the longitudinal flow path defining a concavity greater in depth than other portions of the elongated hollow tube molding space such that the liquid resin injected into the mold space flows in the longitudinal flow path to fill one or more ends of the hollow tube molding space.
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