Plastic and nonmetallic article shaping or treating: processes – Utilizing heat releasable stress to reshape solid workpiece
Patent
1976-06-21
1978-07-11
Pavelko, Thomas P.
Plastic and nonmetallic article shaping or treating: processes
Utilizing heat releasable stress to reshape solid workpiece
128349B, 128350R, 128351, 264150, 264209, 264234, 264249, 264342R, 264343, 264DIG71, B29C 1300
Patent
active
041002466
ABSTRACT:
In accordance with a preferred embodiment of this invention, there is provided a new and improved method of forming a four-lumen gastrointestinal tube. This tube may be characterized as having two lumens which extend nearly the full length of the tube and two lumens which extend through only a portion of the tube. The subject method comprises the steps of: (1) extruding a three-lumen sleeve portion wherein one of the lumens is an insert carrying lumen and the remaining two lumens, in the final gastrointestinal tube assembly, are those lumens which extend the full length of the tube; (2) extruding a two-lumen insert portion, the lumens of which in the final gastrointestinal tube assembly, extend the full length of the assembly, and wherein the external dimensions of the insert portion are slightly larger than the internal dimensions of the insert carrying lumen of the sleeve portion; (3) immersing the sleeve portion in a solvent, preferably chlorothene, to cause it to swell until the internal dimensions of the insert carrying lumen are slightly larger than the external dimensions of the two-lumen insert portion; (4) inserting the insert portion into the insert carrying lumen; and (5) removing the solvent and thereby causing the insert carrying lumen in the sleeve portion to contract around the insert portion forming a "solvent shrink fit."
REFERENCES:
patent: 3544672 (1970-12-01), Goda
patent: 3634924 (1972-01-01), Blake
patent: 3755525 (1973-08-01), Sheridan
patent: 3833004 (1974-09-01), Vasquez
patent: 3972548 (1976-08-01), Roseen
patent: 3975039 (1976-08-01), Penneck
Dow Corning Corporation
Hermann Howard W.
Pavelko Thomas P.
LandOfFree
Method of forming a gastrointestinal tube does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of forming a gastrointestinal tube, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of forming a gastrointestinal tube will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-262482