Folded sheets
OwnerGeorge Wallace McDonaldinventor
Life of this patent
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Abstract
The present invention provides a sheet material (2) comprising a first fold line and a second fold line, the first and second fold lines being defined by a series of at least partial perforations (4,8) in the sheet material (2), wherein there is one or fewer at least partial perforations at an intersection of the first fold line and the second fold line.
Claims88
A sheet material comprising a first fold line and a second fold line, the first and second fold lines being defined by a series of at least partial perforations in the sheet material, wherein there is one or fewer at least partial perforations at an intersection of the first fold line and the second fold line.
A sheet material according to any preceding claim, in which the first and second fold lines are substantially perpendicular to one another.
A sheet material according to any preceding claim, in which the sheet material comprises a plurality of first fold lines providing a first set of fold lines.
A sheet material according to any preceding claim, in which there is one or less at least partial perforations at each intersection of a first fold line and a second fold line.
A sheet material comprising a first fold line and a second fold line, the first and second fold lines both being defined by a series of at least partial perforations in the sheet material, wherein there is a non-perforated section at an intersection of a fold line with an edge of the sheet material.
A sheet material according to any one of claims 13 to 19, in which a non-perforated section is provided at the intersection of each of the first set of fold lines and each of the second set of fold lines with an edge of the sheet material.
A sheet material comprising a first fold line and a second fold line, the first and second fold lines both being defined by a series of at least partial perforations in the sheet material, wherein there is one or less at least partial perforation at an intersection of the first and second fold lines and there is a non-perforated section at an intersection of a fold line with an edge of the sheet material.
A sheet material according to any preceding claim, in which the spacing of the at least partial perforations in a non-perforated section is substantially larger than the spacing between at least partial perforations other than at the non-perforated section.
A sheet material according to any preceding claim, in which th spacing betwe n at least partial perforations at the non-perforated section is at least twice the length of the spacing between at least partial perforations other than at the non-perforated section.
A sheet material according to any preceding claim, in which the spacing between at least partial perforations at the non-perforated section is less than twenty times the length of the spacing between at least partial perforations other than at the non-perforated section.
A sheet material according to any preceding claim, in which the non-perforated section at an intersection of a first and second fold line is between 3-6 mm long.
A sheet material according to any preceding claim, in which the non-perforated section at the intersection of a fold line with an edge of the sheet is about 1-4 mm.
A sheet material according to any preceding claim, in which the spacing between a pair of adjacent at least partial perforations on a fold line is greater than the length of a at least partial perforation.
A sheet material according to any preceding claim, in which the at least partial perforation length is no more than five times the length of the spacing between adjacent at least partial perforations.
A sheet material according to any preceding claim, in which the spacing between adjacent at least partial perforations is suitably uniform along the length of each fold line.
A sheet material according to any preceding claim, in which each series of at least partial perforations defining a fold line comprises at least partial perforations of uniform length.
A sheet material according to any preceding claim, in which the length or diameter of each at least partial perforation is at least 0.25 mm
A sheet material according to any preceding claim, in which the length or diameter of each at least partial perforation is less than 5 mm.
A sheet material according to any preceding claim, in which provided with at least one additional perforated line, which at least one additional perforated line is or are designed to tear more easily than the perforated fold lines.
A sheet material according to any preceding claim, in which the sheet material comprises a paper based sheet material.
A sheet material according to any preceding claim, in which the sheet is provided with visual indicia to indicate where and/or how the sheet should be folded.
A sheet material according to any preceding claim, in which a sheet in accordance with any preceding claim is supplied with at least one cover portion.
A method of producing a folded sheet comprising the steps of:
- (a) providing a sheet material according to any preceding claims,
- (b) applying information and/or decoration onto the sheet of step (a), followed by
- (c) folding the sheet material along fold lines defined by the at least partial perforations.
Apparatus for producing a foldable sheet, the apparatus comprising a plurality of rigid portions in a spaced array and means for substantially securing the rigid portions relative to one another.
Apparatus according to any one of claims Suitably, there are more rigid portions in one direction of the array than the other.
Apparatus for producing a folded sheet, the apparatus comprising a roller, which roller comprises means for at least partly perforating a sheet.
Dependencies are inferred from the claim text.