초록 ▼

A method for repairing cracked and broken plastic articles such as lenses for automobile signal lights and the like comprises the steps of placing a form against a first surface of the plastic article such that the form covers the broken area, preparing an adhesive sealing compound which cures by ex

A method for repairing cracked and broken plastic articles such as lenses for automobile signal lights and the like comprises the steps of placing a form against a first surface of the plastic article such that the form covers the broken area, preparing an adhesive sealing compound which cures by exothermic reaction, applying the compound to the damaged areas of the lens from an opposite surface of the lens, heat generated by the exothermic reaction causing decreased viscosity of the compound and widening of cracks in the lens, the compound flowing into the widened cracks before curing, and, removing the form after the compound has cured, whereby repaired portions of the lens diffuse light in a manner substantially indistinguishable from undamaged portions, and repaired portions are of comparable structural strength to the balance of the lens.

대표청구항 ▼

A method for repairing a broken plastic article adapted for diffuse light transmission, the article having a body broken to define an area having at least one open void through the article and cracks adjacent the void, the void and cracks to be filled and supported, the method comprising the steps o

A method for repairing a broken plastic article adapted for diffuse light transmission, the article having a body broken to define an area having at least one open void through the article and cracks adjacent the void, the void and cracks to be filled and supported, the method comprising the steps of: placing a form on a surface of the broken plastic article, the form covering a first side of said open void; preparing an adhesive sealing compound having a dye for diffuse light transmission and a curing agent to promote curing by exothermic reaction, the adhesive sealing compound being a type that becomes thinner upon exothermic heating prior to gelation; applying the sealing compound to the void from a side opposite the form, heat generated by the exothermic reaction thinning the compound and the compound expanding in the void and cracks, the thinned compound flowing freely into and filling the void and cracks; and, removing the form after the compound has cured whereby said area, filled by said dyed compound, diffuses light in a manner substantially indistinguishable from remaining portions of the article.