PACKAGING MATERIAL, PACKAGING UNDERLAY AND APPARATUS FOR MAKING A PACKAGING MATERIAL

A packaging material comprises a base sheet (4; 148a, 148b) of unexpandable material such as paper and a second sheet (6 or 8; 112a, 112b or 112c) of expandable material such as paper, the second sheet having a number of rows of longitudinally spaced slits with the slits of one row offset from the s...

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Bibliographische Detailangaben
Hauptverfasser:	CRAIG JOHN, BOWEN JAMES H. E, FREER DANIEL R
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS CONVEYING HANDLING THIN OR FILAMENTARY MATERIAL LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNERANALOGOUS TO PAPER MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN AMANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSESB31B OR B31C PACKAGES PACKAGING ELEMENTS PACKING PERFORMING OPERATIONS STORING TRANSPORTING WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUSTO PAPER
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Beschreibung
Zusammenfassung:	A packaging material comprises a base sheet (4; 148a, 148b) of unexpandable material such as paper and a second sheet (6 or 8; 112a, 112b or 112c) of expandable material such as paper, the second sheet having a number of rows of longitudinally spaced slits with the slits of one row offset from the slits of an adjacent row and being secured, in its expanded condition, to the base sheet. A packaging pad may comprise outer layers of unexpandable material with at least one layer of expanded material therebetween. The invention also provides a machine for use in manufacture of the material.