Catheter

Details Catheter Catheter

1973-12-03

1976-03-09

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

1282144, 264 25, 264259, 264264, 264294, 264310, 264323, B29C 1300, B29D 900

Patent

active

039432254

ABSTRACT:
A method and apparatus is disclosed for making a combined needle and catheter of the type in which the needle is used to lead the end of the catheter thereon into a body cavity and, after insertion, is withdrawn through the catheter with most of the catheter remaining in the body. To form the catheter, the needle is initially placed in an upright position with its pointed end downward and located within the orifice of a die wiper. Thereafter, a measured quantity of a viscous plastic material or fluid plastisol is applied to the die wiper on the side thereof opposite the pointed end of the needle and the assembly of needle, die wiper and plastisol is then inverted so that the die wiper falls by gravity and wipes a coating of fluid plastisol along the shank of the needle. When the die wiper has completed its traverse of the needle shank, the assembly is heated to solidify the fluid plastisol on the needle and thereby form a removable flexible catheter on the needle.

REFERENCES:
patent: 2305005 (1942-12-01), Henry
patent: 2647296 (1953-08-01), Shive
patent: 2786252 (1957-03-01), Curran

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