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US 4,384,867 AGranted
Method for treating a web of material with foam
AssigneeEduard Kusters
InventorHeinz Gruber
Life of this patent
Estimating the term…
Abstract
A method for treating a web of material such as rug with a treatment medium in which one treatment medium is applied as part of a layer of foam to the advancing web and the foam allowed to act thereon and, in order to obtain effects not obtainable with the single layer of foam, a further treatment medium is applied to the foam as a foam, liquid, paste or in solid form and allowed to interact with the foam before either treatment medium is fixed, with both treatment media acting on the web.
Claims6
The method for treating a web comprising the steps of:
- a. applying a layer of foam containing a web treatment medium to cover the web as it advances and allowing said layer of foam to act thereon;
- and
- b. after applying said foam, applying at least one further web treatment medium upon said foam in the form of a liquid, allowing said liquid to penetrate into said foam, allowing said foam layer and other treatment medium to interact before either becomes fixed with both treatment media acting on the web.
Dependencies are inferred from the claim text.