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. 04, 1995
Filed:
May. 10, 1993
Junichi Fukuchi, Tokyo, JP;
Japan Tobacco Inc., Tokyo, JP;
Abstract
A rotating polygon mirror deflects a continuous laser beam, applying the deflected beam to a beam-splitting mirror through a focusing lens 6 which functions as an f.theta. lens. The beam is applied to the two reflective surfaces of the mirror alternately. As a result, the mirror splits the beam into two beams, which are applied to two beam-splitting mirrors, respectively. The mirrors split the input beams, each into two segment beams. The four segment beams are focused by four lenses onto the surface of a web sheet, thereby forming beam spots. The beam spots move in the same direction and at the same speed as the web sheet, thus scanning limited surface regions of the sheet. As a result, rows of perforations, each being a truly circular hole, are formed in the web sheet.