Baking stone and method of manufacture thereof
OwnerMark J. O'Tooleinventor
Life of this patent
Estimating the term…
Abstract
An improved composition for baking stones for use in commercial ovens and a method of manufacture of the improved baking stones are disclosed. The baking stone composition is asbestos-free, non-hazardous and is ideal for commercial ovens designed for baking pizza and bread. The improved composition includes portland cement, mortar or mason sand, glass fiber strands, water and a plasticizer. A novel method of manufacture is also disclosed which includes the preferred mixing speeds, mixing times, vibrating speeds, vibrating times and cure times.
Claims2
A composition for preparing a baking stone for use at temperatures exceeding 500.degree. F., the composition consisting of the following approximate percentages by weight:
- ______________________________________ low alkali 48-54% portland cement sand 31-37% alkali resistant .75-1.25% glass fibers water 12.5-15.5% plasticizer .25-.35% ______________________________________
- said glass fibers having lengths from about one-half inch (1/2"),
- the mixture being free of clay, and the plasticizer not exceeding 0.4%.
A cured baking stone for use at temperatures exceeding 500.degree. F., the cured baking stone having a composition consisting of:
- ______________________________________ low alkali portland cement 53-58% sand 34.5-39.5% alkali resistant glass fibers .75-1.5% water 5.5-6.5% plasticizer 0.25-0.35% ______________________________________
- the cured baking stone being free of clay,
- the glass fibers having lengths of about one-half inch (1/2") long, and
- the plasticizer not exceeding 0.4%.
Dependencies are inferred from the claim text.