Improved means to be employed in connection with the conservation, or storing, of rubber in sheet form

摘要

157,673. Johnson, J. Y., (Diamond State Fibre Co.). April 30, 1920. India-rubber sheets; preserving.-India-rubber in sheet form is preserved during storage by applying to one face of the sheet a layer of parchmentized paper or the like. The compound sheet may be rolled up or several sheets may be superposed.