Stock material or miscellaneous articles – Structurally defined web or sheet – Including fastener for attaching to external surface
Patent
1974-03-08
1976-04-06
Lesmes, George F.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including fastener for attaching to external surface
264250, 264255, 264DIG77, 156 59, 156293, 428161, 428212, 428332, 428413, 428425, 428480, 428483, 428500, B32B 306, B32B 300
Patent
active
039491250
ABSTRACT:
This invention relates to composite articles of manufacture and to a method for the preparation of these articles. The articles are impact-resistant, three-dimensional and rigid. The articles are comprised of two essential elements: (1) A pliable, hollow premolded outer plastics layer and (2) an essentially rigid non-cellular organic plastics structural backing member solidified in the hollow interior of the plastics skin, and essentially solidly filling said hollow interior. The hollow outer layer is prepared in a manner to have an access opening to its hollow interior. A liquid plastics composition is next prepared in a separate step that comprises an organic binder which solidifies at room temperature, in most cases by converting to a thermoset stage. This liquid composition is then introduced through the access opening into the cavity of the premolded outer layer. The liquid composition is then solidified in a manner to fill essentially voidlessly and fully the cavity of the outer layer, thus producing a dense tough integral article of manufacture having the shape of the premolded outer layer. Illustrative for the outer layer materials are plasticized polyvinylchloride compositions, polyethylene and rubbers. Illustrative for the interior component are epoxy resins, polyester resins, room temperature curing phenolics, filler containing polysulfide rubber, repolymerized depolymerized rubber and polyurethanes. Fillers may be present in the liquid compositions. By the favored method the outer plastics layer is kept in its original mold when applying and solidifying the liquid plastics composition in its hollow interior. Such mold is either a multipiece or an elastomeric mold permitting removal of the completed rigid article even if undercuts in the shape of the article are present.
REFERENCES:
patent: 1626533 (1927-04-01), Hergershausen
patent: 2252077 (1941-08-01), Katz
patent: 2487218 (1949-11-01), Brinkmann
patent: 2880443 (1959-04-01), Le Febvre
patent: 2921407 (1960-01-01), Wagner et al.
patent: 2968104 (1961-01-01), Ito
patent: 3037771 (1962-06-01), Gambino
patent: 3068007 (1962-12-01), Satchell
patent: 3208750 (1965-09-01), Firth et al.
patent: 3420729 (1969-01-01), Roberts
patent: 3547747 (1970-12-01), Roberts
patent: 3650878 (1972-03-01), Mattsson
Auer Laszlo
Lesmes George F.
McDonald Alan T.
LandOfFree
Molded solid plastics articles and a method for their manufactur does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Molded solid plastics articles and a method for their manufactur, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Molded solid plastics articles and a method for their manufactur will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1577565