Patent Model - Improvement in Disintegrating Fibrous Materials for Paper-Pulp, &c.

Maker and role
August Deininger, Patentee
Production date
Oct 11 1870
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Object detail

Tinned sheet iron
7 1/2 x 3 1/2 x 8" (19.1 x 8.9 x 20.3cm)
Deininger's patent "consists in exposing fibrous materials, such as wood or any vegetable substance, to the action of an alkaline solution under superatmospheric pressure, (about sixty pounds to the square inch,) and at a temperature not exceeding 212* Fahrenheit, in such a manner that, by the combined action of the pressure and the heat, the fibrous material is split and disintegrated without destroying the fibers by overheating or by the chemicals, the forming in the interior of the disintegrating-vat being prevented, and the alkaline solution used being weak, and not in any way injurious to the fibers." (Patent Number 108,241)
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