ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,454,428, issued on Oct. 28, was assigned to Sharp K.K. (Sakai, Japan).
"Image forming apparatus" was invented by Naoki Hasegawa (Sakai, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "In an image forming apparatus, a paper feeder includes: an openable and closable paper feed tray that stores a paper; and an opening and closing detector that detects an open or closed state of a paper feed tray, when determining that abnormality occurs to the paper feed tray that is currently feeding the paper for an image forming device to form an image, an controller determines that the abnormality is caused by failure of the paper feed tray, and executes predeterm...