Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Making hole or aperture in article
Patent
1993-08-16
1995-03-14
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Making hole or aperture in article
114347, 264219, 264310, 425425, 425DIG238, B29C 4104, B29C 4142
Patent
active
053975251
ABSTRACT:
A method of fabricating a sit-on-top kayak having a recessed cockpit surface and an integrally formed hatch flange surrounding a hatch opening. The hatch flange is substantially parallel to the cockpit surface. Such a kayak is formed with a mold having a void formed therein, the void having a recess portion for forming the flange. The recess portion of the void provides negative draft to the mold. Space is provided in the mold such that, during rotational molding, a mass of molten polyethylene accumulates adjacent to the recess containing the polyethylene that will form the flange. When the polyethylene cools and shrinks, the shrinkage of the mass of polyethylene pulls the flange at least partly out of its recess, allowing the kayak blank to be withdrawn from the mold.
REFERENCES:
patent: 3319376 (1967-05-01), Doppelt et al.
patent: 4057612 (1977-11-01), Clark et al.
patent: 4407216 (1983-10-01), Masters
patent: 4520747 (1985-06-01), Masters
patent: 4583480 (1986-04-01), Hamilton et al.
patent: 4980112 (1990-12-01), Masters
patent: 5039297 (1991-10-01), Masters
patent: 5076194 (1991-12-01), Curtis et al.
patent: 5094607 (1992-03-01), Masters
Smith Duane S.
Woo Jay H.
LandOfFree
Method of forming a kayak having integrally formed hatch flange 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 kayak having integrally formed hatch flange , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of forming a kayak having integrally formed hatch flange will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-711917