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US 4,067,737 AGranted
Process of applying protective coating
OwnerAnthony Vincent Lewisinventor
Life of this patent
Estimating the term…
Abstract
A clear resin protective coating is applied to a picture by spreading liquid resin over the picture surface from one edge using a spreader sheet under tension which is carried by a frame hinged parallel to one edge of the picture, so that a `wedge` of resin is advanced over the picture surface as the frame is lowered, forming upon curing a clear protective layer.
Claims6
Process for applying a protective coating to the surface of a picture comprising the steps of:
- applying a clear synthetic resin in liquid state to the surface of the picture adjacent one edge thereof,
- spreading the liquid resin evenly and without the formation of bubbles or occlusions over the said picture surface from the said edge by pressing a flexible spreader sheet under tension over the surface progressively from the said edge, the surface of the spreader sheet which contacts the resin being such that the resin does not adhere thereto,
- curing the resin, and
- removing the sheet to leave a hard, clear protective layer of resin on the picture surface.
1 more element
Dependencies are inferred from the claim text.