Process and apparatus for making a welding sleeve

Details Process and apparatus for making a welding sleeve Process and apparatus for making a welding sleeve

1981-03-27

1982-12-07

Ball, Michael W.

Plastic and nonmetallic article shaping or treating: processes

Utilizing heat releasable stress to reshape solid workpiece

156 86, 1563042, 219535, 219544, 26427219, 264294, 264342R, 425393, 425517, B29C 2700, H05B 358

Patent

active

043626840

ABSTRACT:
A welding sleeve useable for connecting of pipes formed from thermoplastic material, is formed from a tubular body of thermoplastic material and a coil disposed on its inside surface. The coil has a resistance wire encased with thermoplastic material. The windings of the coil (4) are bonded into a compact coil which is inserted into the heated tubular body while it is simultaneously widened. As the result of a partial contraction of the tubular body also of the coil a firm connection develops between the oil and the body. Furthermore, the tubular body has a frozen-in, latent, radial contraction strain as a result of the widening, which during heating during the welding process, eliminates the radial play between coil and the pipes and produces a welding pressure.

REFERENCES:
patent: 3378672 (1975-08-01), Blumenkranz
patent: 3972548 (1976-08-01), Roseen
patent: 4313053 (1982-01-01), Sturm
WO7901018, PCT Sturm.

Affiliated with

Also associated with

Rating

Process and apparatus for making a welding sleeve does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process and apparatus for making a welding sleeve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process and apparatus for making a welding sleeve will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1902779