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US 4,210,479 AGranted
Method for bonding a plastic tubing to a metal needle and the needle assembly formed thereby
AssigneeBaxter Travenol Laboratories, Inc.
InventorEugene Fabisiewicz
Life of this patent
Estimating the term…
Abstract
The method for bonding a plastic tubing to a metal needle includes the steps of coating the inner end of the needle with a cement, inserting the coated inner end of the needle within the outer end portion of a plastic tubing and applying a radiofrequency current across the plastic tubing around the inner end of the needle to heat seal the plastic tubing to the inner end of the needle.
Claims20
A method for bonding the end portion of a plastic tubing to a metal needle including the steps of:
- applying a cement to the inner end of the needle to be inserted within the tubing end portion, placing the needle and tubing within a die comprising two parts, one part being made of an insulating material within which the needle is placed and the other part being metallic within which the tubing end portion is placed, inserting the coated inner end of the needle within the tubing end portion, and applying a high frequency voltage across the outer end of the needle and the metallic part of the die to heat seal the tubing end portion surrounding the coated inner end of the needle to the inner end of the needle.
A method for bonding a stainless steel needle to plastic tubing comprising the steps of:
- applying cement to a portion of the stainless steel needle;
- placing said portion of the stainless steel needle in contact with a segment of the plastic tubing;
- placing said portion of said needle and said segment of plastic tubing in a metal die member substantially surrounding said segment of the plastic tubing in contact with said needle;
- and
- applying heat to said segment of the plastic tubing in contact with the stainless steel needle by applying a high frequency current between said needle and said metal die member to seal the needle and the tubing together.
2 more elements
Dependencies are inferred from the claim text.