Thin decorative cementitious veneers and a method for making same

• US 4,420,525 A
• Filed: 02/11/1982
• Issued: 12/13/1983
• Est. Priority Date: 02/11/1982
• Status: Expired due to Term

• Current Assignee: Parks, David M.
• Original Assignee: Parks, David M.
• Inventors: Parks, David M.
• Primary Examiner(s): Czaja, Donald E.
• Assistant Examiner(s): Housel, James C.
• Application Number:
  US06/347,999
• Time in Patent Office: 670 Days
• Field of Search: 264/245, 264/225, 264/256, 264/257, 264/247, 264/246, 264/333, 264/87, 264/79, 264/295, 264/338, 428/156, 428/220
• US Class Current: 428/156
• CPC Class Codes: B28B 7/0064 Moulds characterised by special surfaces for producing a desired surface of a moulded article, e.g. profiled or polished moulding surfaces B28B7/36 takes precedence; producing decorative effects B44C; designs of stone surfaces B44F
• CPC Class Codes: B28B 7/36 Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded articlelubricating surfaces of moulds, cores or mandrels B28B7/38
• CPC Class Codes: B44C 3/04 Modelling plastic materials, e.g. clay
• CPC Class Codes: B44C 5/0453 produced by processes involving moulding
• CPC Class Codes: B44C 5/0461 used as wall coverings
• CPC Class Codes: Y10T 428/24479 including variation in thickness

Abstract

Novel thin flexible decorative colored cementitious veneers of about 5 to 60 mils in thickness, useful in wall coverings, floor coverings and on ceilings; and methods of producing said thin decorative cementitious veneers wherein printing, embossing and casting are performed simultaneously. The basic method comprises the steps of placing a wet cloth on a mold engraved with a design followed by placing a plastic cement mix on said wet cloth to simultaneously form a casting and a temporary cloth mold which is the exact copy of the original mold, immediately removing the plastic cement casting together with the temporary cloth mold from the original engraved mold before it sets, thereby making the original mold immediately available for the next casting, removing the temporary cloth mold from said plastic cement casting before it sets, and air curing said casting while being stored.

Claims

1. A method of making a thin decorative cementitious veneer of about 5 of 60 mils thick which comprises the steps of:

providing at least one waterproof mold with an engraving having an intaglio design or pattern;

placing an overhanging wet cloth on the engraved mold;

placing a plastic hydraulic colored cement mix onto said wet cloth and forcing said cement mix into the incised portions of the engraving to simultaneously form a casting and a temporary cloth mold which is the exact copy of the original mold;

compacting said plastic cement, by removing excess water;

immediately removing said cement casting together with the temporary cloth mold from the engraved mold before it sets;

removing the temporary cloth casting from said plastic cement casting before it sets;

and storing said plastic casting unitl it sets by air curing.

2. The method according to claim 1, wherein a second or background layer of a differently colored plastic cement mix is placed on said first layer of compacted plastic cement, and compacting said second layer, prior to removing said dual colored plastic casting from the engraved mold.

3. The method according to claim 1, wherein the cement is compacted by pressing absorbent paper towels into the wet cement which absorbs the excess water and discarding the wet paper towels.

4. The method according to claim 1, including the additional steps of:

placing an overhanging thin, flat plastic sheet over the entire plastic cement casting, whereby said plastic cement is sandwiched between the temporary cloth mold and said plastic sheet;

removing said plastic casting from the engraved mold by means of said overhanging cloth and sheet; and

placing said plastic casting on a firm surface with the temporary cloth mold facing up.

9. The method according to claim 1, wherein the water-proof mold is a dried sheet with a colored granular design thereon, produced by:

placing differently colored granules in the grooves of a grooved mold;

covering the top of said mold with the adhesive covered side of a plastic sheet;

rotating said mold so that the colored granules make contact with and adhere to said sheet at designated areas; and

drying said sheet of a colored granular design.

10. The method according to claim 9, wherein said granular design is impressed into a plastic cement veneer casting with the colored granules firmly embedded into the surface of said thin cement veneer.

16. A thin decorative cementitious veneer casting of about 5 to 60 mils thick, with the decorative pattern, design or picture extending the full depth of the veneer, and is hard tough durable and flexible, and capable of being shaped while plastic into any form, made in accordance with the method of claim 2.

5. The method according to claim 5, including the step of applying a thin flat plastic sheet to the uncovered surface of the plastic cement casting after removal of the temporary cloth mold, so that said plastic casting is sandwiched between two plastic sheets, and allowed to set by air curing.

6. The method according to claim 5, wherein the plastic cement casting sandwiched between two plastic sheets may be shaped while still plastic into a permanent form by placing said plastic casting around a shaped form and permitting said casting to harden thereon.

7. The method according to claim 6, wherein the shaped form is a channel with a decorative cement veneer.

8. The method according to claim 5, wherein flexible thin cement joints are cast and cured comprising of a top layer of cement without fibers and a bottom layer of fiber reinforced cement, sandwiched between two plastic sheets.

11. A method of making a thin decorative cementitious veneer of about 5 to 60 mils thick which comprises the steps of:

providing at least one waterproof mold with an engraving having an intaglio design or pattern;

placing an overhanging sheet of aluminum foil on the engraved mold;

placing a plastic hydraulic colored cement mix onto said aluminum foil and forcing said cement mix into the incised portions of the engraving to form a permanent aluminum foil mold affixed to the cement casting, which is the exact copy of the original mold;

compacting said plastic cement, by removing excess water;

immediately removing said permanent aluminum foil mold and cement casting from the engraved mold before it sets;

and storing said plastic casting affixed to said aluminum foil until it sets by air curing.

12. The method according to claim 11, wherein a backing sheet is placed on the plastic cement casting which adheres to the cement casting to encase said plastic cement casting between said aluminum foil and said backing sheet, which facilitates removal of the cement casting from the model mold, and allows said encased casting to air cure.

13. The method of claim 12, wherein the cured aluminum encased casting can be used as a wall, ceiling or floor covering.

14. A method of making a thin decorative cementitious veneer of about 5 to 60 mils thick which comprises the steps of:

providing at least one waterproof mold with an engraving having an intaglio design or pattern;

placing an overhanging wet paper on the engraved mold;

placing a plastic hydraulic colored cement mix onto said wet paper and forcing said cement mix into the incised portions of the engraving to simultaneously form a casting and a temporary paper mold which is the exact copy of the original mold;

compacting said plastic cement, by removing excess water;

immediately removing said cement casting together with the temporary paper mold from the engraved mold before it sets;

leaving the temporary paper mold in place with the cement casting to set with the casting;

and storing said casting affixed to the paper until its sets by air curing.

15. The method of claim 14, wherein the set paper and casting can be used as a wall, celing or floor covering.