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US 4,801,490 AGranted
Method and apparatus for sand blasting a design on glass
OwnerJames R. Schuetteinventor
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OwnerJames R. Schuetteinventor
Estimating the term…
A stencil is provided which is useful for sandblasting a design on a glass substrate. The stencil comprises a paper sheet having a particular adhesive coated on one side and a pattern made from a sandblasting resist material coated onto the other side. The stencil is self-adhesive. In addition, the stencil provides adequate amounts of adhesive in a form which allows good adhesion to a glass substrate without being present in an amount which would interfere with the sandblasting process. The adhesive is deposited onto the paper sheet from a suspension of liquid gum particles which results in an adhesive layer having a multiplicity of discrete gum particles adhered to the paper and to each other at their points of contact. The stencil is used in a sandblasting process wherein the stencil is adhered to the glass by wetting the adhesive and then the stencil/glass assembly is sandblasted to erode the areas of the glass which underlie the portion of the stencil which is not protected by the resist layer. Thereafter, the stencil is easily removed by washing in hot water.
A self-adhesive stencil for a sandblasting operation which comprises a paper sheet having an adhesive coating on one side and a coating of sandblast resist material on the other side;
A stencil for a sandblasting operation which compises a polyvinyl plastisol resist pattern adhered to one side of a sheet of dry gummed adhesive paper;
A method of making a stencil which comprises depositing a sandblast resist layer of polyvinyl plastisol in the form of a pattern onto one side of a water activatable self-adhesive gum coated paper wherein one side of the paper is coated with the resist layer and the other side is coated with the adhesive gum coating and said gum coating is a layer containing a multitude of discrete gum particles adhered to the paper and to each other at their points of contact.
A method of sandblasting a pattern or design on the surface of a hard material which comprises adhering a self-adhesive stencil onto the surface;
Dependencies are inferred from the claim text.