Method and apparatus for drying coatings or films
AssigneeAnsell Limited
InventorJohn H. Osgood
Life of this patent
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Abstract
A technique is disclosed for drying and curing a liquid film applied to a former which is reactive to radio frequency energy so as to generate heat. A liquid film, such as latex, is applied to a metallic former which is then disposed in the proximity of an applicator which propagates radio frequency energy. In response, by a process of induction the former generates heat and thereby advantageously dries said film in an inside-to-outside manner. A superior product is produced which is substantially free of defects and blemishes.
Claims20
An apparatus for drying a liquid film comprising:
- a former which is comprised of a substantially magnetic material and is substantially reactive to radio frequency energy so as to generate heat;
- means for applying said liquid film to said former;
- a radio frequency energy source and means for propagating radio frequency energy generated by said radio frequency energy source;
- means for disposing said former with said liquid film within an effective proximity to said propagating means so as to result in the generation of heat by said former, which heat is transmitted to and drys said liquid film;
- and
- means for removing said dried liquid film from said former.
A process for drying a liquid film to form a product comprising the steps of:
- applying a liquid film to a former which is comprised of a substantially magnetic material, wherein said former is substantially reactive to radio frequency energy to generate heat;
- subjecting said former with said liquid film to a source of radio frequency energy so that the former generates heat that drys said liquid film;
- and
- removing said dried liquid film from said former.
A process for drying a liquid film comprising the steps of:
- applying a liquid film to an article which is comprised of a substantially magnetic material, wherein said article is substantially reactive to radio frequency energy to generate heat;
- subjecting said article with said liquid film to a source of radio frequency energy so that the article generates heat that drys said liquid film;
- and
- removing said dried liquid film from said article.
Dependencies are inferred from the claim text.