Claims
- 1. In a method of forming a tubular member comprising the steps of; placing a plastic tube on a vertical mandrel, and radiantly heating a predetermined length of the end of the tube from opposite sides thereof to heat opposite portions of the circumference of the tube differently than the remainder of the circumference until the tube increases in diameter and wall thickness along the predetermined length to define a bulb of oval configuration.
- 2. In a method of making a catheter assembly including the steps of; placing a plastic tube on a vertical mandrel, and heating a predetermined length of the end of the tube from opposite sides thereof to heat opposite portions of the circumference of the tube differently than the remainder of the circumference until it increases in diameter to form a bulb of oval configuration.
- 3. A method as set forth in claim 2 further defined as heating the predetermined length until the wall thickness thereof increases to form the bulb.
- 4. A method as set forth in claim 3 further defined as heating the predetermined length at the end of the tube to form a cup-shaped bulb.
- 5. A method as set forth in claim 4 including molding a plastic hub about the bulb both interiorly and exteriorly thereof.
- 6. A method as set forth in claim 5 further defined as heating the tube radiantly.
- 7. A method as set forth in claim 6 further defined as heating the tube at a temperature near the melting point of the plastic tube.
- 8. A method as set forth in claim 6 further defined as heating the tube at a temperature in the range of 675.degree. F. to 700.degree. F.
Parent Case Info
This application is a divisional of application Ser. No. 743,038 filed Nov. 18, 1976 now U.S. Pat. No. 4,095,598.
US Referenced Citations (5)
Divisions (1)
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Number |
Date |
Country |
Parent |
743038 |
Nov 1976 |
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