Printing apparatus, method for controlling same, and storage medium

Abstract

A printing apparatus has a first storage unit, a second storage unit, a reception unit that receives a job, a switching unit that switches the storage unit that is used, from the storage unit currently in use to another storage unit holding the same type of sheets as the storage unit currently in use, when the remaining amount of sheets in the storage unit currently in use reaches a predetermined amount during the execution of the job, and a control unit that controls the timing at which blowing of air into the sheets held in the other storage unit is started, to vary this timing depending on whether the type of sheets held in the storage unit currently in use or in the other storage unit is the first type of sheets or the second type of sheets.

What is claimed is: 
     
         1 . A printing apparatus, comprising:
 a first sheet storage unit that stores a first type of sheets;   a second sheet storage unit that stores a second type of sheets;   a reception unit that receives a job in which the first type of sheets and the second type of sheets are used;   a switching unit that switches the sheet storage unit that is used, from the sheet storage unit currently in use to another sheet storage unit holding the same type of sheets as the sheet storage unit currently in use, when the remaining amount of sheets in the sheet storage unit currently in use reaches a predetermined amount during the execution of the job; and   a control unit that controls the timing at which blowing of air into the sheets held in the other sheet storage unit is started, so as to vary this timing depending on whether the type of sheets held in the sheet storage unit currently in use or in the other sheet storage unit is the first type of sheets or the second type of sheets.   
     
     
         2 . The printing apparatus according to  claim 1 ,
 wherein in switching the first sheet storage unit to another first sheet storage unit, the control unit starts the blowing of air into the sheets held in the other first sheet storage unit when the remaining amount of sheets stored in the first sheet storage unit reaches a specific amount, and   in switching the second sheet storage unit to another second sheet storage unit, the control unit starts the blowing of air into the sheets held in the other second sheet storage unit when the remaining amount of sheets stored in the second sheet storage unit reaches a specific amount, and information about the second type of sheets has been set in a buffer that stores information about sheets scheduled to be fed.   
     
     
         3 . The printing apparatus according to  claim 2 ,
 wherein the control unit does not blow air into the sheets held in the other second sheet storage unit when there is no information about the second type of sheets in the buffer, and   the control unit starts blowing air into the sheets held in the other second sheet storage unit when there is information about the second type of sheets in the buffer.   
     
     
         4 . The printing apparatus according to  claim 1 ,
 wherein the printing job is a bookbinding job, and   the first type of sheets is body paper, and the second type of sheets is inserting paper.   
     
     
         5 . A method for controlling a printing apparatus having a first sheet storage unit that stores a first type of sheets and a second sheet storage unit that stores a second type of sheets, said method comprising the steps of:
 using a reception unit to receive a job in which the first type of sheets and the second type of sheets are used;   using a switching unit to switch the sheet storage unit that is used from the sheet storage unit currently in use to another sheet storage unit that holds the same type of sheets as the sheet storage unit currently in use, when the remaining amount of sheets in the sheet storage unit currently in use reaches a predetermined amount during the execution of the job; and   using a control unit to control the timing at which blowing of air into the sheets held in the other sheet storage unit is started, so as to vary this timing depending on whether the type of sheets held in the sheet storage unit currently in use or in the other sheet storage unit is the first type of sheets or the second type of sheets.   
     
     
         6 . A computer-readable storage medium storing a computer program for executing on a computer the steps in the method for controlling a printing apparatus according to  claim 5 .