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:
May. 28, 2013
Filed:
Aug. 23, 2010
Toshiaki Kagawa, Osaka, JP;
Toshiaki Kagawa, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A laser fixing device, which is for use in an electrophotographic image forming apparatus, including: a carrying device for carrying a sheet; and a laser array section which is made up of a plurality of laser sources arrayed in a line, the plurality of laser sources irradiating a non-fixed toner image, which is attached to the sheet that is being carried by the carrying device, with a laser beam so that the non-fixed toner image is fused and fixed to the sheet. In the laser fixing device, an irradiation region length and a sheet carrying speed are set so that tn≧0.259·mt, where mt is a maximum level of an attached-toner amount per unit area of the sheet (mg/cm) in the image forming apparatus, and tn is an irradiation region crossing time (msec), which is found by dividing the irradiation region length by the sheet carrying speed, the irradiation region length being a length, in the direction in which the sheet is carried, of a region on the sheet which region is irradiated with the laser beam. According to this configuration, it is possible to prevent a void from occurring in the laser fixing device.