Abstract: This invention provides a document processing apparatus and method for searching, for a specific document image, a database in which a plurality of document images are registered in correspondence with the attributes of partial regions. A document image associated with search is segmented into partial regions. The attribute of each partial region of the segmented document image associated with search is determined. At least one document image is selected from document images registered in the database on the basis of the number of partial regions for each attribute in the document image associated with search.

Abstract: A position detecting sensor for detecting that a sheet having come into an openable both-face conveying path for reversing the surfaces of the sheet having an image formed on one surface thereof and conveying the reversed sheet to an image forming portion has arrived at a predetermined re-feeding position, and the position detecting sensor is designed to be capable of detecting also the presence or absence of the occurrence of jam in the both-face conveying path, the mounting and dismounting of a both-face conveying portion and the opening and closing of the both-face conveying path.

Abstract: A recording apparatus comprising a first ink tank mounted on a carriage, a second ink tank which remains disconnected from the first tank during recording, means for intermittently forming an ink supply path extending between the first and second ink tanks when ink is to be supplied to the first tank from the second tank, and means for maintaining constant the amount of ink within the first ink tank.