Web lateral position control

A method and apparatus for controlling the lateral position of a moving web (402) of material having a central longitudinally extending web axis (408) extending generally parallel to the direction of movement of the web (402) so as to maintain the central longitudinally extending axis (408) of the w...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	WENDELL, JAEMS, DITTO, JAMES WILLIAM
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CONVEYING HANDLING THIN OR FILAMENTARY MATERIAL HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS,CABLES LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM LINING MACHINES PACKING PERFORMING OPERATIONS PRINTING PRINTING MACHINES OR PRESSES STAMPS STORING TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	A method and apparatus for controlling the lateral position of a moving web (402) of material having a central longitudinally extending web axis (408) extending generally parallel to the direction of movement of the web (402) so as to maintain the central longitudinally extending axis (408) of the web (402) at a substantial constant lateral position relative a fixed longitudinally extending axis (412) associated with a fixed web alignment station based upon the detected longitudinal distance (b) between certain portions of a series of longi tudinally spaced apart, substantially identical, generally transversely extending indicia (401,403) in a longitudinally extending indicia path parallel to the central longitudinal axis (408) of the web.