Improvements in Presses and Heating-apparatus for Moulding and Vulcanizing India-rubber Printing Sheets and the like.

摘要

12,898. Smith, R. R. June 8. Thermometers. - In a screw press combined with a gas or oil stove for moulding china clay or other plastic material into a mould, drying the said mould, and afterwards moulding and vulcanizing sheet rubber into printing-sheets with type on the surface, or other articles, the platen H is formed with a recess t to bold mercury and receive a metal sheath n containing a thermometer o.