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US 10,946,545 B2Granted
Nonlinear line of weakness formed by a perforating apparatus
AssigneeThe Procter & Gamble Company
InventorsKathryn Christian Kien, Deborah Sue Slovut, Jeffrey Moss Vaughn
Life of this patent
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Abstract
A web includes a curvilinear line of weakness. The curvilinear line of weakness includes a plurality of perforations. Each of the plurality of perforations is separated by a bond area. Each of the plurality of perforations has a perforation length and each bond area has a non-perforation length.
Claims19
A web comprising:
- a sinusoidal-shaped line of weakness comprising at least two wavelengths, the sinusoidal-shaped line of weakness comprising a plurality of perforations, wherein each of the plurality of perforations is separated by a bond area, and
- wherein each of the plurality of perforations has a perforation length and each bond area has a non-perforation length,
- wherein at least two of the non-perforation lengths are unequal and at least two of the perforation lengths are unequal,
- wherein the sinusoidal-shaped line of weakness has a peak force to tear of less than 840 grams, as measured according to the Tensile Strength Test Method,
- wherein each of the wavelengths comprises a crest and a trough, and
- wherein the perforation lengths are substantially the same length at the crests and the troughs of the wavelengths and a different length between the crests and the troughs of the wavelengths, and
- wherein the non-perforation lengths are substantially the same length at the crests and the troughs of the wavelengths and a different length between the crests and the troughs of the wavelengths.
4 more elements
A web comprising:
- a curvilinear line of weakness comprising at least two wavelengths, the curvilinear line of weakness comprising a plurality of perforations, wherein each of the plurality of perforations is separated by a bond area, and
- wherein each of the plurality of perforations has a perforation length and each bond area has a non-perforation length,
- wherein at least two of the non-perforation lengths are unequal and at least two of the perforation lengths are unequal,
- wherein the curvilinear line of weakness has a peak force to tear of less than 840 grams, as measured according to the Tensile Strength Test Method,
- wherein each of the wavelengths comprises a crest and a trough, and
- wherein the perforation lengths are substantially the same length at the crests and the troughs of the wavelengths and a different length between the crests and the troughs of the wavelengths, and
- wherein the non-perforation lengths are substantially the same length at the crests and the troughs of the wavelengths and a different length between the crests and the troughs of the wavelengths.
4 more elements
A web comprising:
- a curvilinear line of weakness comprising at least two wavelengths, the curvilinear line of weakness comprising a plurality of perforations, wherein each of the plurality of perforations is separated by a bond area, and
- wherein each of the plurality of perforations has a perforation length and each bond area has a non-perforation length,
- wherein each of the wavelengths comprises a crest and a trough, and
- wherein the perforation lengths are substantially the same length at the crests and the troughs of the wavelengths and a different length between the crests and the troughs of the wavelengths,
- wherein the non-perforation lengths are substantially the same length at the crests and the troughs of the wavelengths and a different length between the crests and the troughs of the wavelengths, and
- wherein the curvilinear line of weakness has a failure total energy absorbed (TEA) of less than 89.1 grams*inch/inch.
3 more elements
Dependencies are inferred from the claim text.