Round rubber champhering ring

Abstract

A continuous round, rubberized ring is employed to produce a champher, or beveled, edge on a concrete base. Initially concrete is poured into a cylindrical form and the ring pressed into the top side of the cylindrical form. Excess cement is removed with a trowel and the cement is allowed to harden. After the cement has hardened, the form is removed and the ring stripped off leaving an attractive and safe champher on the upper edge of the base. An alternative embodiment of the ring includes a lip that can be easily gripped so the ring can be removed from the hardened concrete base. The gripping lip also prevents the ring from falling below the upper rim of the mold when the concrete is in its wet, plastic state.

1 . A method of forming a champhered edge on a base comprising the steps of:
 a. creating a substantially cylindrical form having a rim and an interior sidewall which forms an inner cavity;   b. pouring concrete into said cavity substantially up to said rim;   c. inserting a continuous ring into the said cavity so that it substantially contacts said interior sidewall and is substantially flush with said rim; and,   d. removing said ring and said cylindrical form leaving a cement base with a contoured, champhered, upper edge.   e. removing said ring leaving a base having a champhered, upper edge.   
   
   
       2 . The method of  claim 1  further comprising the step of:
 f. removing excess concrete after step “c” but before step “d” so that the surface of said concrete is substantially level with said ring and said rim before said concrete hardens.   
   
   
       3 . The method of  claim 2  further wherein said ring includes a top section, a sidewall section and a beveled section that runs diagonally between said top section and said sidewall section and wherein step “c” further comprised placing said ring into said form so that said beveled section faces said concrete after it is poured. 
   
   
       4 . The apparatus of  claim 3  wherein said base is a light stand base. 
   
   
       5 . The apparatus of  claim 3  wherein said base is a column. 
   
   
       6 . In an apparatus for forming a contoured edge on a base which is formed by pouring concrete into a cylindrical form having an interior cavity and a rim and further employing a contour forming device to form said contour in said base after said concrete has hardened, the improvement comprising:
 a continuous ring having at least a top section, a sidewall section and a beveled section that lies in a plane diagonal with respect to the planes of said top and sidewall sections.   
   
   
       7 . The apparatus of  claim 6  wherein said top section and said sidewall sections are substantially perpendicular with respect to each other. 
   
   
       8 . The apparatus of  claim 7  wherein said ring is resilient so that it can be easily stripped away from concrete after it has substantially hardened. 
   
   
       9 . The apparatus of  claim 8  wherein said ring further comprises a lip extension so that said ring can be easily grabbed by hand and removed from said base. 
   
   
       10 . The apparatus of  claim 9  wherein said ring is placed in said poured concrete with said sidewall substantially contacting said interior cavity and said top section of said ring being substantially flush with said rim of said form so that said beveled section faces said poured concrete and forms a beveled edge in said hardened concrete when said ring is removed. 
   
   
       11 . The apparatus of  claim 10  wherein said base is a light stand base. 
   
   
       12 . The apparatus of  claim 10  wherein said base is a column. 
   
   
       13 . The apparatus of  claim 10 , wherein said ring is prepared by a method comprising:
 a. combining about 99% by volume of a polyurethane prepolymer and up to about 1% by volume of a toluene diisocyanate isomer blend to produce a first chemical component;   b. combining about 70% to about 75% by volume of a polyol-plasticizer blend (non-hazardous), from about 25% to about 30% by volume of a di(methylthio)toluene diamine, and up to about 1% by volume of a phenylmercuric neodecanoate catalyst to produce a second chemical component; and,   c. combining said first and second chemical components.