초록 ▼

A process for applying a permanent filled engraved identification to the surface of an object such as a paving brick which is made of porous material. The process includes the steps of coating the surface of the object on which the identification is to be applied with a water soluble sealant and all

A process for applying a permanent filled engraved identification to the surface of an object such as a paving brick which is made of porous material. The process includes the steps of coating the surface of the object on which the identification is to be applied with a water soluble sealant and allowing the coating to dry; removably adhering a stencil, which has been prepared by perforating a stencil material to provide an opening defining the identification to be applied, to the dry coated surface; applying a stream of material to the adhered stencil opening to remove the soluble sealant coating and a portion of the porous material to a desired depth to provide an engraved identification in the object; removing the stencil from the object; applying a flowable filler material that will set in and fill the engraved identification; allowing the filler material to set; and applying water to the object for a period of time sufficient to dissolve the water soluble sealant and cause any of the filler material which is not in the engraved identification to be released and removed from the surface of the object.

대표청구항 ▼

A process for applying a permanent filled engraved identification to the surface of an object made of porous material comprising the steps of: A. coating said surface on which the identification is to be applied with a water soluble sealant of sodium silicate and allowing said coating to dry; applyi

A process for applying a permanent filled engraved identification to the surface of an object made of porous material comprising the steps of: A. coating said surface on which the identification is to be applied with a water soluble sealant of sodium silicate and allowing said coating to dry; applying a second coat of sodium silicate and allowing it to dry; B. placing a perforated stencil on said surface to provide an opening defining the identification to be applied; C. removing said soluble sealant coating and a portion of said porous material from said stencil opening and to a desired depth in said object to provide an engraved identification in said object; D. removing said stencil from said object; E. applying a flowable epoxy resin to said engraved identification, which resin will set in and fill said engraved identification; F. allowing said resin to set; and G. applying water to said object for a period of time sufficient to dissolve said water soluble sealant and cause any of said resin which is not in said engraved identification to be released and removed from said surface o said object.