Tooling method for expanded slit sheet material
OwnerDavid Paul Goodrich, Sheldon H. Parkerinventors
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Abstract
The present invention discloses a method of producing at least a pair of interlocking adjacent layers of a paper packaging product, the pair of interlocking adjacent layers being formed of a sheet of slit paper having a slit pattern, the slit pattern upon expansion, forming cells that include land regions that are inclined with respect to a plane of an unexpanded sheet. The method comprises slitting the sheet of slit paper with beveled blades that have a first wedge angle on one side of the blades and a second wedge angle on the other side of the blades, wherein the first wedge angle is wider than the second wedge angle to produce slits that upon expansion, produce the lands regions that have angles of inclination in a range for 50 to 85 degrees.
Claims22
A method of producing a paper packaging product including a sheet of slit paper having a slit pattern, the slit pattern upon expansion forming cells that include land regions that are inclined with respect to a plane of an unexpanded sheet, the method comprising the steps of:
- slitting the sheet of slit paper,
- expanding the sheet of slit paper with said slits producing land regions that have angles of inclination in a range from 50 to 85 degrees from the plane of the unexpanded sheet, with said land regions alternating on a row by row basis in forward and backward directions such that the slit pattern upon expansion includes an alternating cell opening pattern wherein each row opens in an opposite direction from an adjacent row.
The method according to claim, wherein
- wherein said sheet of slit paper is configured to form said land regions alternating on a row by row basis in forward and backward directions and said alternating cell opening pattern wherein each row opens in an opposite direction from an adjacent row by an operator expanding the sheet of slit paper with an expander.
An apparatus for producing a paper packaging product including a sheet of slit paper, the sheet of slit paper having a slit pattern, the slit pattern upon expansion forming cells that include land regions that are inclined with respect to a plane of an unexpanded sheet, the apparatus comprising:
- a slitter that slits the sheet of slit paper with a plurality of blades, which produce slits that upon expansion, produce land regions that have angles of inclination in a range from 50 to 85 degrees from the plane of the unexpanded sheet, with said land regions alternating on a row by row basis in forward and backward directions such that the slit pattern upon expansion includes an alternating cell opening pattern wherein each row opens in an opposite direction from an adjacent row.
A paper packaging product, comprising:
- a sheet of slit paper having a slit pattern, the slit pattern upon expansion forming cells that include land regions that are inclined with respect to a plane of an unexpanded sheet;
- the sheet of slit paper being configured such that expanding the sheet of slit paper with said slits produces land regions that have angles of inclination in a range from 50 to 85 degrees from the plane of the unexpanded sheet, with said land regions alternating on a row by row basis in forward and backward directions such that the slit pattern upon expansion includes an alternating cell opening pattern wherein each row opens in an opposite direction from an adjacent row.
Dependencies are inferred from the claim text.