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:
Apr. 26, 1977
Filed:
Sep. 02, 1975
Applicant:
Inventors:
Takeshi Matsumoto, Sodegaura, JA;
Hidehiko Kaji, Sodegaura, JA;
Osamu Isogai, Ichihara, JA;
Masami Tomikawa, Sodegaura, JA;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B43K / ;
U.S. Cl.
CPC ...
401 96 ;
Abstract
Pencils not requiring sharpening are produced by wrapping a thermoplastic resin sheet, which has been uniaxially stretched, around a core material so that a stretched direction of the sheet forms a spiral against the core material, whereby the sheet forms a holder for the pencil which may be stripped off to selectively expose the core material.