Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bematec SA
Bolton Emerson Americas Inc
Original Assignee
Bolton Emerson SA
Bolton Emerson Americas Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bolton Emerson SA, Bolton Emerson Americas IncfiledCriticalBolton Emerson SA
Priority to FR7415676ApriorityCriticalpatent/FR2270369A1/fr
Publication of FR2270369A1publicationCriticalpatent/FR2270369A1/fr
Application grantedgrantedCritical
Publication of FR2270369B1publicationCriticalpatent/FR2270369B1/fr
D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
D21D1/00—Methods of beating or refining; Beaters of the Hollander type
D21D1/20—Methods of refining
D21D1/30—Disc mills
D21D1/303—Double disc mills
FR7415676A1974-05-071974-05-07Double disc paper stock refiner - with inlet fittings having annular spiral flow chambers with helical back wall
GrantedFR2270369A1
(en)