B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/1206
B29C 1/00 (1980.01)
Patent
CA 1051154
A B S T R A C T In the manufacture of an oil seal element from polytetrafluoro- ethylene and the like, tubular billet of polytetrafluoroethylene or the like is provided with inner and outer cylindrical surfaces approximating the desired diameter, and an end wall is faced off perpendicular to the cylindri- cal surfaces. A series of washers of a desired thickness is sliced from the billet without machinery. Each washer may next be cut to exactly the desired inner and outer diameter, and, simultaneously spiral grooves or other hydro- dynamic shapes may be formed on one face of each washer, leading from the inner periphery of each washer for a desired distance toward the outer peri- phery; this is done by using a novel blank-pierce-coining die that both trims the seal and coins the groove between a pair of metal surfaces at very heavy pressure to permanently deform the material in these surfaces.
299171
LandOfFree
Blank-pierce-and coining die does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Blank-pierce-and coining die, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Blank-pierce-and coining die will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-704364