Image forming apparatus and sheet reconveyance propriety discriminating method
AssigneeCanon Kabushiki Kaisha
InventorTeruhito Kai
Life of this patent
Estimating the term…
Abstract
Provided is a technology capable of identifying presence/absence of buckling at an occurrence of a jam and determining more appropriately whether or not to perform automatic sheet discharge. A sound collecting device provided on a conveying path of an image forming apparatus is used to collect sound generated from a sheet at the occurrence of the jam. Generated spectrum data is obtained by analyzing characteristics of the collected sound. The generated spectrum data is compared with reference spectrum data, to thereby identify the presence/absence of the buckling and discriminate the conveyance propriety of the sheet.
Claims9
An image forming apparatus, comprising:
- a conveyance unit configured to convey a sheet along a conveying path;
- a microphone configured to collect sound generated by performing, by the conveyance unit, conveyance of the sheet;
- a sheet detecting unit configured to detect the sheet;
- a jam detecting unit configured to detect a jam of the sheet;
- a control unit configured to control to stop conveying the sheet by the conveyance unit if the jam of the sheet is detected by the jam detecting unit;
- an analysis unit configured to analyze a frequency of the sound during a period in which the sheet is being conveyed if the jam of the sheet is detected by the jam detecting unit;
- and
- a decision unit configured to determine whether or not an intensity of a frequency component falls within a predetermined range, that is corresponding to the frequency, for each frequency based on the analyzed frequency and decide whether or not the conveyance unit is enabled to discharge the sheet based on a number of frequencies whose intensity of the frequency component falls within the predetermined range;
- wherein the control unit causes, based on the analyzed frequency, in a case where a number of frequencies whose intensity of the frequency component falls within the predetermined range is smaller than a predetermined number, the conveyance unit to stop conveying the sheet and then discharge the sheet.
Dependencies are inferred from the claim text.