Plastic article or earthenware shaping or treating: apparatus – Distinct means to feed – support or manipulate preform stock... – Female mold type means
Patent
1995-04-26
1997-01-14
Heitbrink, Tim
Plastic article or earthenware shaping or treating: apparatus
Distinct means to feed, support or manipulate preform stock...
Female mold type means
4251291, B29C 4514
Patent
active
055937063
ABSTRACT:
A simple and inexpensive method and apparatus for molding a peripheral frame around a sheet or grid of thermoplastic material to produce a framed panel. A peripheral frame, preferably of structural foam or the like, is injection molded about a thermoplastic sheet or grid of panel-forming material which has been previously drawn or stretched at a temperature which orients the molecules of the polymer, i.e., below the glass transition temperature of the polymer, T.sub.g. Either during the frame molding process, or subsequent thereto, the panel-forming material is heated sufficiently to cause the material to shrink or revert toward its prestretched condition so as to tension the panel-forming material within the frame. Elastomeric sealing devices are disclosed for sealing the mold during injection of the frame-forming material and locator fingers are provided to position a grid-like panel-forming material prior to initiation of the molding process. By the utilization of structural foam molding techniques, a panel of thermoplastic material may be integrally-molded and tensioned within a rigid frame to produce a framed panel of any size for use as a barrier, a fence, a guard, a closure, a seat or bedding support, a filter member or other such applications.
REFERENCES:
patent: 2681294 (1954-06-01), Beguin
patent: 3107991 (1962-01-01), Taussig
patent: 3273862 (1966-09-01), Miller
patent: 3523994 (1970-08-01), Shockey
patent: 3729889 (1973-05-01), Baruzzini
patent: 3930632 (1976-01-01), Shigeta et al.
patent: 3956550 (1976-05-01), Sutch
patent: 4214411 (1980-07-01), Pickett
patent: 4248647 (1981-02-01), Herron et al.
patent: 4260576 (1981-04-01), Pollard
patent: 4269579 (1981-05-01), Thomas
patent: 4374798 (1983-02-01), Mercer
patent: 4584155 (1986-04-01), Zanella
patent: 4688752 (1987-08-01), Barteck et al.
patent: 4695420 (1987-09-01), Grawey et al.
patent: 4709443 (1987-12-01), Bigley
patent: 4743323 (1988-05-01), Hettinga
patent: 4769100 (1988-09-01), Short et al.
patent: 5034077 (1991-07-01), Pata
patent: 5078363 (1992-01-01), Simpson et al.
patent: 5132148 (1992-07-01), Reafler
patent: 5184800 (1993-02-01), Tabler
patent: 5308559 (1994-05-01), Baracchi et al.
patent: 5402988 (1995-04-01), Eisele
General Electric, "Handbook of Engineering Structural Foam", Jan. 1978, Cover, pp. 4-7, and Back Cover.
Heitbrink Tim
The Tensar Corporation
LandOfFree
Panel framing system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Panel framing system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Panel framing system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1386283