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US 4,758,450 AGranted
Object coated with plastic and process for producing it
AssigneeSimro AG
InventorsGunther Czech, Theodor Fessel
Life of this patent
Estimating the term…
Abstract
An object coated with plastic described, whereby the object consists of high-melting plastic onto which a coating is melted of plastic powder. The method is specifically concerned with coating spectacle frames with resin powder in a vortical sintering bath.
Claims3
A process of coating a spectacle frame or part thereof composed of polyetherimide or polyethersulfone with a plastic powder comprising the steps of:
- a. preheating the spectacle frame or part thereof to a temperature in the range of from 170.degree. C. to 230.degree. C.
- b. immersing the preheated spectacle frame or part from 1 to 5 seconds in a vortical sintering bath of ethylenevinyl-alcohol-copolymer, polyether block amide, epoxide, polyamide or mixtures of these;
- and
- c. removing the spectacle frame or part from the vortical sintering bath and allowing said spectacle frame or part to cool.
1 more element
Dependencies are inferred from the claim text.