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Publication of FR649949ApublicationCriticalpatent/FR649949A/en
D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
D21F1/00—Wet end of machines for making continuous webs of paper
D21F1/48—Suction apparatus
D21F1/50—Suction boxes with rolls
FR649949D1927-03-011928-02-27
Suction box for paper machines, cardboard machines, cellulose wringing machines, and other similar machines
ExpiredFR649949A
(en)