AN APPARATUS AND METHOD FOR DEGRADING A WEB IN THE MACHINE DIRECTION WHILE PRESERVING CROSS-MACHINE DIRECTION STRENGTH

At least a portion of a web is perforate embossed. A first embossing roll having embossing elements and at least a second embossing roll having embossing elements are provided. The embossing elements of the first and second embossing rolls define perforate nips for embossing and perforating the web....

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Bibliographische Detailangaben
Hauptverfasser:	WILLIAMS, ROBERT J, RUTHVEN, PAUL J, SCHULZ, GALYN A, ZAHN, HARLIE C, HANSEN, MARK D, GRACYALNY, DALE T, DAUS, ROBERT R, DEMILLE, JOHN R, MOGGED, OTTO, III, KRASZEWSKI, ALAN J
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BANDAGES, DRESSINGS OR ABSORBENT PADS BEARINGS BLASTING CONVEYING DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS ELEMENTS OR CRANKSHAFT MECHANISMS ENGINEERING ELEMENTS AND UNITS FILTERS IMPLANTABLE INTO BLOOD VESSELS FIRST-AID KITS FLEXIBLE SHAFTS FOMENTATION GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HANDLING THIN OR FILAMENTARY MATERIAL HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS,CABLES HEATING HUMAN NECESSITIES HYGIENE IMPREGNATING OR COATING OF PAPER LIGHTING MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNERANALOGOUS TO PAPER MECHANICAL ENGINEERING MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD ORMATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER MEDICAL OR VETERINARY SCIENCE METHODS OF PRODUCING PAPER THEREON ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES PACKING PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING PAPER-MAKING MACHINES PERFORMING OPERATIONS PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRODUCTION OF CELLULOSE PROSTHESES PULP COMPOSITIONS ROTARY BODIES OTHER THAN GEARING ELEMENTS SHAFTS STORING TEXTILES THERMAL INSULATION IN GENERAL TRANSPORTING TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G TREATMENT OR PROTECTION OF EYES OR EARS WEAPONS WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUSTO PAPER
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Beschreibung
Zusammenfassung:	At least a portion of a web is perforate embossed. A first embossing roll having embossing elements and at least a second embossing roll having embossing elements are provided. The embossing elements of the first and second embossing rolls define perforate nips for embossing and perforating the web. At least a portion of at least the first or second embossing roll is crowned. At least a portion of the perforate nips are substantially oriented in the cross-machine direction. Au moins une partie dune bande est embossée par perforation. Un premier rouleau gaufreur doté déléments dembossage et au moins un deuxième rouleau gaufreur doté déléments dembossage sont présentés. Les éléments dembossage des premier et deuxième rouleaux gaufreurs définissent des pinces de perforation permettant dembosser et de perforer la bande. Au moins une partie du premier ou du deuxième rouleau gaufreur est couronnée. Au moins une partie des pinces de perforation est essentiellement orientée dans le sens contraire de la machine.