Process for gold foil stamping in relief
OwnerFrederic Lesieurinventor
Life of this patent
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Abstract
Gilding or relief-marking process which starts with any typographic, offset or other impression and converts it into relief of variable thickness, by the known thermography principle, but employing a hot-melt powder endowing the film forming the relief with adhesive properties capable, after it has solidified, of transferring and retaining on its surface a marking material.
Claims10
A method of gilding raised images formed by a thermographic process on a substrate with a marking layer of the type releasably disposed on a backing film comprising the steps of:
- providing a thermally activated adhesive powder of the type that exhibits adhesive properties while in a solidified state;
- printing a selected image of the type capable of retaining said thermally activated adhesive powder on said substrate;
- selectively depositing a layer of said thermally activated adhesive powder on said selected image;
- heating said thermally activated adhesive powder disposed on said selected image to a temperature sufficient to melt said thermally activated adhesive powder, forming an adhesive film over said selected image;
- then
- cooling the adhesive film sufficiently to cause it to solidify but still retain its adhesiveness;
- then
- briefly pressing said marking layer disposed on said backing film against said adhesive film disposed over said selected image, causing said marking layer to bond to said adhesive film and release from said backing film.
A method of gilding a substrate with a marking layer of the type releasably disposed on a backing film, comprising the steps of:
- providing a thermally activated adhesive powder of the type that will liquefy under a sufficient amount of heat and will exhibit adhesive properties when cooled to a solid state;
- printing a selected image of the type capable of retaining said thermally activated adhesive powder on said substrate;
- selectively depositing a layer of said thermally activated adhesive powder on said selected image;
- heating said thermally activated adhesive powder disposed on said selected image to a temperature sufficient to melt said thermally activated adhesive powder, forming an adhesive film over said selected image which has a raised appearance;
- then
- cooling the adhesive film by discharging air on the film to a temperature sufficiently low to cause it to solidify but still retain its adhesive properties;
- then
- briefly pressing said marking layer disposed on said backing film against said adhesive film at a pressure sufficiently low to avoid flattening the raised appearance of said image, causing said marking layer to bond to said relief adhesive film and release from said backing film.
Dependencies are inferred from the claim text.