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D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
D21G9/00—Other accessories for paper-making machines
FR981228D1943-03-161943-03-16
Method and apparatus for making paper, cardboard, artificial leather, etc. and products obtained using these means
ExpiredFR981228A
(en)
Process and apparatus for the continuous preparation of waterproofed sidewalls from one or more strips of paper or other flexible sheet materials, in particular for the mass production of flexible side-walled containers