Patent ID: 7064852

Claim:
An image forming apparatus executing a plurality of JOBs comprising: a document stand which puts a document thereon; a reading section for a copy mode which optically reads an image of the document put on the document stand; an input section for a printer mode which enters an image transferred from an external device; a plurality of paper holding sections where paper is respectively accommodated in different sizes; a print section which prints the image read by the reading section and the image entered by the input section on the paper of the respective paper holding sections; an operational section which specifies the size of the paper; first, second, third, and fourth registers; a first judgment section which checks whether or not the proper sized paper for the JOB exists in the paper holding sections when there occurs a copy JOB for printing the image read by the reading section on the paper of the size specified by the operational section, or a printer JOB for printing the image entered by the input section on the paper of the size specified by the external device; a second judgment section which checks whether or not the JOB judged in the first judgment section is the above copy JOB when the judgment result of the first judgment section is positive; a first control section which registers the above copy JOB into the first register when the judgment result of the second judgment section is positive; a second control section which registers the JOB judged in the first judgment section into the second register as a saved JOB when the judgment result of the first judgment section is negative; a third judgment section which checks whether or not the number of copies for the JOB judged in the second judgment section is less than a predetermined reference number when the judgment result of the second judgment section is negative; a third control section which registers the JOB judged in the third judgment section into the third register as a priority JOB when the judgment result of the third judgment section is positive; a fourth control section which registers the JOB judged in the third judgment section into the fourth register as an ordinal JOB when the judgment result of the third judgment section is negative; a monitor section which continually monitors whether or not a JOB is registered in the respective registers in the order of the first, the second, the third, and the fourth registers when printing of the print section is completed; and a fifth control section which executes the registered JOB at once when a JOB registered is found in the above monitor section.