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.
Patent No.:
Date of Patent:
Feb. 25, 1992
Filed:
Sep. 07, 1990
Masayasu Nonogaki, Numazu, JP;
Fumiaki Arai, Mishima, JP;
Yuji Natori, Numazu, JP;
Hideyuki Yamaguchi, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A thermosensitive stencil paper in which a thermoplastic resin layer is formed on a porous tissue paper containing natural fibers therein, serving as a porous substrate, with plant elements contained in the porous tissue paper selected in such a fashion that (1) plant elements having a maximum width ranging from 100 .mu.m to 5 mm, a maximum length ranging from 100 .mu.m to 5 mm, and an area of 7800 .mu.m.sup.2 or more, when measured in a posture which provides a maximum area of the plant element are present in a number of 150 or less in a 100 cm.sup.2 area of the porous tissue paper; and (2) plant elements having a maximum width ranging from 300 .mu.m to 5 mm, a maximum length ranging from 300 .mu.m to 5 mm, and an area of 70,000 .mu.m.sup.2 or more are present in a number of 25 or less in a 100 cm.sup.2 area of the porous tissue paper.