Title: Method for powder coating

Abstract: A method for powder coating of articles with an organic polymeric material. Articles to be coated, preferably glass containers, are transported by a first conveying mechanism through a pre-heat oven wherein their temperature is raised to a level above ambient temperature. The preheated containers are then transferred to chucks of a second conveying mechanism which carry the containers through a powder spray apparatus wherein the organic polymeric material is applied to the container. The chucks of the second conveying mechanism are cool and any oversprayed material will not adhere thereto. After spraying, the containers are again heated to cure the sprayed-on powder coating to form a filmlike layer on the container. The containers are then cooled below the softening point of the organic polymeric material and released from the second conveying mechanism for further handling.

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Inventors: Heckman, Russell W. (Perrysburg, OH, US)
Koluch, Joseph S. (Northwood, OH, US)
Rhoads, Roger R. (Toledo, OH, US)

Application Number: 503321
Filing Date: 1974-09-05
Publication_date: 1977-02-22
Assignee: Owens-Illinois, Inc. (Toledo, OH)
Primary Class(es): 427/195 118/66, 118/308, 118/324, 118/503, 118/642, 427/422, 427/469, 427/477
Other Classes:
US Patent Ref:

3226245	Dec, 1965	Dettling et al.	117/21.
3260611	Jul, 1966	Weidenhammer et al.	117/18.
3467059	Sep, 1969	Korner et al.	117/101.
3579684	May, 1971	Duffy	10/10.
3734765	May, 1973	Russell et al.	117/94.
3777875	Dec, 1973	Sobran	198/131.
3802942	Apr, 1974	Amberg et al.	156/86.
3805985	Apr, 1974	Hagiwara et al.	117/21.
3828729	Aug, 1974	Goodridge	117/93.
3856498	Dec, 1974	Campagna et al.	117/21.
3860104	Jan, 1975	Strauss	198/179.
3895126	Jul, 1975	Strauss et al.	427/195.

Other Refs:
Primary Examiner: Smith, Ronald H.
Assistant Examiner: Beck, Shrive P.
Attorney: McLary; Steve M., Bruss, Jr.; Howard G., Holler; E. J.