Patent ID: 9323197
Filing Date: 2016-04-26
CPC Classification: G03G

Claim Text:
1. A history storage device comprising: a generating unit configured to generate history information including event information corresponding to an event having occurred and accompanying information accompanying the event information, the event related to supply of sheets or image formation onto a sheet; a determining unit, in storing first history information in a storage region, configured to determine whether or not the event information included in the first history information is the event information in second history information having already been stored in the storage region; a setting unit, when event information included in the first history information is determined to be the event information included in the second history information, configured to not set the storage region to store the event information included in the first history information and set the storage region to store the accompanying information included in the first history information in a region corresponding to the event information included in the first history information within the storage region; and a reconstruction unit, in reading out the first history information from the storage region, based on the region in which the accompanying information included in the first history information has been stored, configured to associate the event information with the accompanying information included in the first history information to reconstruct the first history information.