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. 07, 1991
Filed:
Nov. 09, 1989
Mita Industrial Co., Ltd., , JP;
Abstract
An image forming apparatus includes a memory having stored code data, code data input keys and a preheat changeover key for selectively switching the fixing device to a preheat mode or an operation ready mode, whereby the apparatus is permitted to operate when code data manually entered by the code data input keys are identical with code data previously stored in the memory. The image forming apparatus further includes entered code data release means responsive to operation of the preheat changeover key for switching the fixing device to the preheat mode, release entered code data whereby the apparatus is inhibited from operating. When the preheat key is pressed, the apparatus is switched to the preheat mode and, at the same time, the entered code data is released. Accordingly, the apparatus requires no dedicated button or key for releasing the entered code data, and may put, to practice use, the preheat changeover means which has been conventionally disposed.