The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Jan. 16, 2007

Filed:

May. 24, 2002
Applicants:

Akira Hirasawa, Shizuoka, JP;

Takeharu Mukai, Saitama, JP;

Inventors:

Akira Hirasawa, Shizuoka, JP;

Takeharu Mukai, Saitama, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 5/14 (2006.01);
U.S. Cl.
CPC ...
Abstract

Disclosed is a sanitary tissue paper roll wherein, when a sanitary tissue paper roll of two-ply or three-ply is laid on a horizontal surface with its central axis in a horizontal orientation, and a circular plate indenter, having an area of 2 cmand being arranged at a center of an upper surface of an outer periphery of a body of the roll, is vertically pressed at least at respective pressing pressures of 0.5 gf/cmand 50 gf/cm, a difference in depths upon this respective pressing is within a range of 2.5–3.5 mm. Also disclosed is a sanitary tissue paper roll made by winding one sheet or two layered sheets of sanitary tissue papers wherein a roll compressibility of the roll is 0.68–0.74 m/cm, with the roll compressibility being defined as a value obtained by dividing a roll length by a cross section of the roll. Also disclosed is a sanitary tissue paper for a sanitary tissue paper roll, wherein a sample paper is compressed between steel plates, which respectively have a circular surface with a compression area of 2 cm, at a maximum compression load of 50 gf/cm, and upon returning of this paper sample, a linearity of a displacement curve between a load and a thickness is 0.2500–0.3300 for a one-ply, and 0.3400–0.3700 for a two-ply; and a thickness upon a load of 50 gf/cmis equal to at least 0.1400 mm for a one-ply, and equal to at least 0.2500 mm for a two-ply.


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Hirasawa, Akira. (2007). Thin sanitary paper roll method of manufacturing the paper roll, and thin sanitary paper for thin sanitary paper roll (U.S. Patent No. 7163732). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7163732

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