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:
Jan. 19, 1993
Filed:
Dec. 07, 1990
Japan Tobacco Inc., Tokyo, JP;
Abstract
In an apparatus for forming micro-holes on a cigarette, a laser beam is divided into first and second laser beams by a two-dividing mirror. Parts of the laser beams are detected by photo detectors, respectively and the other parts of the laser beams are guided to polyhedron mirrors through first and second optical paths and divided into segment beams by the mirrors, respectively. The segments beams are focused on the corresponding cigarette so that micro-holes are formed on the cigarette. The cigarette is transferred to a dilution detection stage and the dilution is detected in mode, detection signals from the photodetector are processed and a first driving signal is generated. Thus, the two-dividing mirror is driver by a driving mechanism in accordance with the first driving signal so that the intensity of the laser beams guided in the first and second optical paths are maintained in substantially equal level. In an stable driving mode, a second driving signal which is determined in accordance with the detected dilution is applied to the driving mechanism in stead of the first driving signal so that the two-dividing mirror is a driven in accordance with the second driving signal.