Patent Publication Number: US-6714744-B2

Title: Printing apparatus, and informing method in printing apparatus

Description:
FIELD OF THE INVENTION 
     The present invention relates to a printing apparatus such as a printer, copying machine, or the like and, more particularly, to a printing apparatus which copes with a short supply of expendables. 
     BACKGROUND OF THE INVENTION 
     When expendables such as ink as a printing agent, paper sheets as a printing medium, or the like have run out, the conventional printing apparatus alerts the user to that state at that time, and the user supplies expendables in accordance with the information. A printing apparatus automatically ordering to a predetermined supplier based on supplier information stored in the apparatus in case of short supply of expendables is also provided. 
     However, it is very troublesome to supply expendables which have run out during a print process. Also, when expendables run short, the user must place an order to a retailer as a supplier of them, and a print process is suspended until the expendables are supplied. 
     Further, The main objective of the conventional manner of automatically ordering is to prevent expendables or stocks from running out. Thus, considering the cost and the like, useful retailers for users is not always set. 
     Further, when printing through use of a network, where there is a plurality of printing apparatuses, burdens on a system manager may increase since the manager must respectively manage each of the printing apparatuses and expendables such as toner and paper used in each of the printing apparatuses. A system which can easily manage expendables under such a network situation and can conduct useful ordering for users is desirable. 
     SUMMARY OF THE INVENTION 
     It is an object of the present invention to provide a printing apparatus which can quickly cope with a short supply of expendables, and an information method in the printing apparatus. 
     It is another object of the present invention to provide a system, apparatus, method, medium, and program for managing expendables which can be ordered under useful conditions for users and can cope with a printing system under a network circumstance. 
     According to the present invention, there is provided a printing apparatus comprising: 
     measuring means for measuring a remaining amount of a predetermined expendable; 
     determination means for determining if the remaining amount is smaller than a threshold value, which is set in advance; and 
     information means for, when said determination means determines that the remaining amount is smaller than the threshold value, informing an user of that determination result. 
     According to the present invention, there is also provided an informing method for a printing apparatus, comprising: 
     the measuring step of measuring a remaining amount of a predetermined expendable; 
     the determination step of determining if the remaining amount is smaller than a threshold value, which is set in advance; and 
     the information step of informing an user of a determination result when it is determined in the determination step that the remaining amount is smaller than the threshold value. 
     According to the present invention, there is also provided a recording medium which records a program for making, for the purpose of informing a printing apparatus, a computer function as: 
     measuring means for measuring a remaining amount of a predetermined expendable; 
     determination means for determining if the remaining amount is smaller than a threshold value, which is set in advance; and 
     information means for, when said determination means determines that the remaining amount is smaller than the threshold value, informing an user of that determination result. 
     According to the present invention, there is also provided a printing apparatus comprising: 
     control means for issuing a search instruction for searching for supplier information of expendable used in the printing apparatus when the remaining amount or the use amount of expendables reaches a predetermined amount. 
     According to the present invention, there is also provided a method for a printing apparatus comprising: 
     the control step of issuing search instruction for searching for supplier information of expendables used in the printing apparatus when the remaining amount or the use amount of expendables reaches a predetermined amount. 
     According to the present invention, there is also provided a recording medium which records a program for making a computer for a printing apparatus function as: 
     control means for issuing a search instruction for searching for supplier information of expendables used in the printing apparatus when the remaining amount or the use amount of expendables reaches a predetermined amount. 
     According to the present invention, there is also provided a program for making a computer for a printing apparatus function as: 
     control means for issuing a search instruction for searching for supplier information of expendables used in the printing apparatus when the remaining amount or the use amount of expendables reaches a predetermined amount. 
     According to the present invention, there is also provided an external apparatus connected to a printing apparatus comprising: 
     control means for issuing a search instruction of expendables to an external database when it is informed that the remaining amount or the use amount of expendables which is detected by the printing apparatus reaches to a predetermined amount. 
     According to the present invention, there is also provided a method for an external apparatus connected to a printing apparatus comprising: 
     the control step of issuing a search instruction of expendables to an external database when it is informed that the remaining amount or the use amount of expendables which is detected by the printing apparatus reaches to a predetermined amount. 
     According to the present invention, there is also provided a recording medium which records a program for making a computer connected to a printing apparatus function as: 
     control means for issuing a search instruction of expendables to an external database when it is informed that the remaining amount or the use amount of expendables which is detected by the printing apparatus reaches to a predetermined amount. 
     According to the present invention, there is also provided a program for making a computer connected to a printing apparatus function as: 
     control means for issuing a search instruction of expendables to an external database when it is informed that the remaining amount or the use amount of expendables which is detected by the printing apparatus reaches to a predetermined amount. 
     According to the present invention, there is also provided an external apparatus connected to a printing apparatus comprising: 
     receiving means for receiving a first search instruction from the printing apparatus, and 
     control means for issuing a second search instruction based on the received first search instruction to an external database via the Internet. 
     According to the present invention, there is also provided a method for an external apparatus connected to a printing apparatus comprising: 
     the receiving step of receiving a first search instruction from the printing apparatus, and 
     the control step for issuing a second search instruction based on the received first search instruction to an external database via the Internet. 
     According to the present invention, there is also provided a recording medium which records a program for making a computer connected to a printing apparatus function as: 
     receiving means for receiving a first search instruction from the printing apparatus, and 
     control means for issuing a second search instruction based on the received first search instruction to an external database via the Internet. 
     According to the present invention, there is also provided a program for making a computer connected to a printing apparatus function as: 
     receiving means for receiving a first search instruction from the printing apparatus, and 
     control means for issuing a second search instruction based on the received first search instruction to an external database via the Internet. 
    
    
     Other features and advantages of the present invention will be apparent from the following description taken in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof. 
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. 
     FIG. 1 is a block diagram of a printing apparatus A according to an embodiment of the present invention; 
     FIG. 2 is a flow chart showing the process in the printing apparatus A; 
     FIG. 3 is a flow chart showing another example of the process in the printing apparatus A; 
     FIG. 4 shows a display example of a display unit  1 D when the apparatus warns the user that paper sheets are running short; 
     FIG. 5 shows a display example of the display unit  1 D when the apparatus warns the user that paper sheets are running short during a print process; 
     FIG. 6 is a block diagram of a printing apparatus B according to another embodiment of the present invention; 
     FIG. 7 shows an example of the arrangement of an input unit  7 A; 
     FIG. 8 shows an example of an input window of retailer information; 
     FIG. 9 shows a display example of retailer information; 
     FIG. 10 is a block diagram showing another example of the arrangement of the printing apparatus B; 
     FIG. 11 is a block diagram of a printing apparatus C according to still another embodiment of the present invention; 
     FIG. 12 is a flow chart of unique data transfer; 
     FIG. 13 is a flow chart showing the process in a database  12 B; 
     FIG. 14 is a block diagram of a printing apparatus D according to still another embodiment of the present invention; 
     FIG. 15 is a flow chart of an order confirmation process; 
     FIG. 16 shows a display example of a confirmation message of an ordering process; and 
     FIG. 17 is a flow chart of the ordering process. 
     FIG. 18 is a block diagram showing a printing apparatus according another embodiment of the present invention; 
     FIG. 19 is a table showing an example of search condition contents set in a storage unit; 
     FIG. 20 is a flow chart showing the process of a search instruction to an external provider; 
     FIGS. 21A and 21B are views showing an example of search results displayed on the display unit of the printing apparatus; 
     FIG. 22 is a block diagram showing an example of the topology of a manager computer and network system; and 
     FIGS. 23A and 23B are views showing an example of search results displayed on the display unit of the manager computer. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Preferred embodiments of the present invention will now be described in detail in accordance with the accompanying drawings. 
     (First Embodiment) 
     FIG. 1 is a block diagram of a printing apparatus A according to an embodiment of the present invention. 
     A printing apparatus A comprises a CPU  1 A for controlling this apparatus, a storage unit  1 B required upon controlling the apparatus, a print unit  1 C for performing a print process, and a display unit  1 D such as a display for displaying predetermined information for the user. Note that expendables to be detected in the printing apparatus A are paper sheets used in the print process. The CPU  1 A controls each of the components such as the storage unit  1 B, the print unit  1 C, the display unit  1 D, an input unit  7 A and a communications unit  12 A which are described later, and the like. 
     FIG. 2 is a flow chart showing the process in the printing apparatus A. Note that N represents the remaining number of paper sheets stocked in the printing apparatus A. Also, M (&gt;0) represents a threshold value at which out-of-paper information is issued. The number N of paper sheets and threshold value M are saved in the storage unit  1 B. Note that the default value of the remaining number N of paper sheets is the number of paper sheets stocked in the printing apparatus A upon feeding paper sheets, but that value need not always be accurate and can be approximate. That is, the user need only be informed when paper sheets are about to run out. 
     In step S 201 , a print process for one page is done. In step S 202 , the number of sheets for one page is decremented from the remaining number N of paper sheets. That is, the remaining number N of paper sheets= N− 1. 
     It is checked in step S 203  if the instructed print process is complete. If NO in step S 203 , the flow returns to step S 201  to print the next page. If YES in step S 203 , the flow advances to step S 204 . 
     It is checked in step S 204  if the remaining number N of paper sheets is smaller than the threshold value M. If NO in step S 204 , i.e., N≧M, the flow ends. 
     On the other hand, if YES in step S 204 , i.e., N &lt;M, the flow advances to step  205  to display on the display unit  1 D a message indicating that the remaining number of paper sheets is small, i.e., informs the user that paper sheets will run out soon. After that, flow ends. 
     In this manner, since the apparatus warns the user that paper sheets will run out soon before paper sheets run out, the user can replenish paper sheets at an appropriate timing, and paper sheets can be prevented from suddenly running out during the print process. 
     In the process shown in FIG. 2, whether or not an information is generated is determined by comparing the remaining number of paper sheets with the threshold value after the print process of all pages is completed, but may be determined before the print process. 
     FIG. 3 is a flow chart showing the process in that case. 
     In step S 401 , the remaining number N of paper sheets is compared with the threshold value M. If N≧M, the flow advances to step S 403  to execute a print process. 
     If N&lt;M, the flow advances to step S 402  to display on the display unit  1 D a message that paper sheets will run out soon and, after that, a print process is executed (step S 403 ). 
     FIG. 4 shows a display example on the display unit  1 D when the apparatus informs the user that paper sheets are running short. This message may be kept displayed until the user makes a given operation on the printing apparatus. Also, when the user has made the given operation and starts another process, a small dialog box  6 A may be displayed on a given corner of the screen, as shown in FIG.  5 . 
     In the aforementioned flow chart, the remaining number N of paper sheets is compared with the threshold value M before or after the print process. Alternatively, such process may be done every time each page is printed. 
     The remaining number N of paper sheets is computed by counting the number of printed pages. Alternatively, a sensor for detecting the remaining number of paper sheets may be added, and the remaining number of paper sheets computed based on the detection value of that sensor may be compared with the threshold value. As such sensor, a sensor for detecting the total weight of remaining paper sheets, a sensor for detecting the total height of remaining paper sheets, or the like may be used. In such case, the number of paper sheets need not always be strictly and accurately detected like the default value of the remaining number N of paper sheets. 
     A printing apparatus B that displays information of a supplier that deals with expendables will be explained below. Such supplier includes a retailer that deals with expendables, a supply department of a company or the like where the printing apparatus is equipped, and the like. In this embodiment, the supplier will be explained as a retailer. 
     FIG. 6 is a block diagram of the printing apparatus B which has an arrangement obtained by adding an input unit  7 A to that of the printing apparatus  1 A shown in FIG.  1 . The user inputs retailer information from the input unit  7 A, and can store it in the storage unit  1 B. 
     FIG. 7 shows an example of the arrangement of the input unit  7 A. Upon depression of a button  8 A, the display unit  1 D displays an input window of retailer information. FIG. 8 shows an example of such input window. Reference numeral  9 A denotes an area for inputting retailer information. 
     In this case, a keyboard  9 B is displayed on the screen. On the keyboard  9 B, a cursor  9   c  that can be moved by buttons  8 B and  8 C is displayed. When the user moves the cursor  9   c  to a target character or the like and then presses a button  8 D, that character or the like is displayed on the input area  9 A, and retailer information can be input sequentially. 
     The retailer information input in this manner and stored in the storage unit  1 B is displayed on the display unit  1 D simultaneously with or after the aforementioned message (FIGS. 2 and 3) indicating that paper sheets are running short. FIG. 9 shows a display example on the display unit  1 D in the former case, and retailer information is displayed in a dialog box  10 A. 
     As a result, the user can immediately contact that retailer and can replenish paper sheets before they actually run out. 
     Note that retailer information may be input by loading a removable medium  11 B that records the retailer information into an external storage device  11 A connected to the printing apparatus B, as shown in FIG.  10 . As the removable medium  11 B, for example, a magnetic card may be used. If the magnetic card can be distributed with low cost, the retailer may offer a free magnetic card to the user. 
     A printing apparatus C that records therein data unique to the apparatus, and selectively displays retailer information based on that unique information will be explained below. 
     FIG. 11 is a block diagram of the printing apparatus C which has an arrangement obtained by adding an input unit  1 A and a communication unit  12 A such as a modem or the like that accesses an external database  12  via a telephone line  12 C to the arrangement shown in FIG.  1 . Also, data  12 D unique to the apparatus such as an installation address of the printing apparatus C or the like is recorded in the storage unit  1 B. 
     If it is determined in the process shown in FIG. 2 or  3  that paper sheets are running short, the apparatus shown in FIG. 11 accesses the database  12 B via the communication unit  12 A to acquire retailer information stored in the database  12 B. In this case, the communication unit  12 A transfers the data  12 D unique to the apparatus to the database  12 B to search for retailer information associated with that unique data, e.g., information that pertains to a retailer near the installation address of the printing apparatus C, and that information is supplied to the printing apparatus C. 
     FIGS. 12 and 13 are flow charts showing that process. 
     The printing apparatus C sends the unique data  12 D to the database  12 B (step S 131 ). After that, the printing apparatus C waits for search result data sent from the database  12 B (step S 132 ). Upon receiving retailer information, the printing apparatus C displays the received data (step S 133 ), thus ending the display process of the retailer information. Note that the retailer information is stored in the storage unit  1 B. 
     FIG. 13 is a flow chart showing the process of the database  12 B. The database  12 B waits for the unique data  12 D sent from the printing apparatus C (step S 141 ). Upon receiving the unique data, information of, e.g., a retailer near the installation address of the printing apparatus C is searched for (step S 142 ), and is sent back to the printing apparatus C (step S 143 ). 
     In these processes, if paper sheets are running short, the printing apparatus accesses the database  12 B at that time. However, the printing apparatus need not access the database every time paper sheets are running short. This is because retailer information is rarely frequently changed. Hence, the printing apparatus may access the database once per several months. 
     In the aforementioned example, the database  12 B is accessed via the telephone line  12 C. Alternatively, data stored in the database  12 B may be supplied to the external storage device  11 A shown in FIG. 10 via a removable medium. For example, a CD-ROM or the like as a large-size storage medium may be used. 
     A printing apparatus D that executes a process for ordering expendables will be explained below. 
     FIG. 14 is a block diagram of such printing apparatus, which has an arrangement obtained by adding an input unit  7 A and a communication unit  15 A such as a modem or the like for connecting a provider  15 B to the arrangement shown in FIG.  1 . The printing apparatus D connects the provider  15 B via the communication unit  15 A and places an order by browsing the Internet. 
     FIG. 15 is a flow chart of an order confirmation process. 
     If it is determined in the process shown in FIG. 2 or  3  that paper sheets are running short, a message asking the user if an order is to be placed is displayed (step S 161 ). FIG. 16 shows a display example ( 17 A) in such case. Note that an ordering process may be automatically executed without asking the user. 
     The control waits for an instruction from the input unit  7 A (step S 162 ), and it is then checked if an order instruction is input (step S 163 ). 
     If the user inputs the order instruction, the flow advances to step S 164  to execute an ordering process; otherwise, the flow ends. 
     FIG. 17 is a flow chart of the ordering process. 
     A connection process to the provider is executed (step S 181 ), and the URL of the home page of the order destination is sent to open that home page (step S 182 ). After that, the user inputs in accordance with a description on the home page, and places an order. 
     If expendables to be ordered are determined in advance, an order form may be automatically sent, thus saving input labor. 
     Alternatively, the aforementioned data unique to the apparatus may be sent together to automatically search for an order destination, and to execute an ordering process. 
     Furthermore, in the aforementioned example, the home page of the order destination is directly accessed. Alternatively, a FAX form, mail form, or the like may be prepared in advance, and may be displayed on the display unit  1 D in the ordering process. After the user inputs required items, an order may be placed to a retailer via a FAX or mail. 
     Moreover, the apparatus may automatically call a retailer. In such case, a telephone line connection device such as a telephone set, modem, or the like may be connected to the communication unit  15 A, which automatically places a call to a retailer, and after a connection is established, the user may talk via the telephone set to execute the ordering process. In this case, if the product name or the like of expendables which are running short is displayed on the display unit, an order error can be prevented. 
     Note that charging upon purchasing expendables may be made using a system similar to a pay-per-view system in data broadcast or the like. 
     Upon, e.g., establishing a dial-up connection to the Internet, the price for expendables may be added to the connection fee of the provider. 
     In either case, the retailer must make a contract with the provider. 
     The Internet or program provider itself may sell expendables, and smooth payment is allowed in such case. 
     In the above embodiments, only paper sheets have been explained as expendables. Also, the present invention can be applied to ink in an ink-jet printer, toner in an LBP, and the like. In such case, the remaining amount can be determined by measuring the consumed amount in an actual print process. Alternatively, a sensor for detecting the current remaining amount may be used. 
     As for the remaining amounts of expendables, the use states of expendables may be stored along with time, and the number of days until they are projected to run out may be estimated based on the stored values, or a threshold value of the remaining amount of expendables may be set in correspondence with the estimation result. 
     In the above embodiment, the telephone line is used to connect the Internet. Alternatively, a dedicated line, CATV, wireless means, and the like may be used. 
     (Second Embodiment) 
     FIG. 18 is a block diagram showing the arrangement of a printing apparatus according to the second embodiment. In FIG. 18, a search unit  18 A, a detection unit  18 B, and a retailer terminal  18 C connected to a provider  15 B via the Internet are added to the arrangement of FIG.  14 . Note that arrangements in the provider  15 B and retailer terminal  18 C are the same as in FIG. 18 except for the absence of a print unit  1 C, and a detailed description thereof will be omitted. Each of the units shown in FIG. 18 is controlled by CPU  1 A. 
     The detection unit  18 B has a function of detecting the remaining amount and use amount of expendables such as ink, toner, or paper, or the service life of photosensitive body, and a function of identifying whether a new expendable cartridge is attached when an expendable such as ink or toner is attached as a cartridge to a printing apparatus. The detection sensor  18 B also has a function of calculating the running-out speed of expendables running out in a printing apparatus, and a function of roughly estimating from the calculated running-out speed and the remaining expendable amount a remaining period (time) for which expendables in use will completely run out. This function operates for ink, toner, paper, and a photosensitive body. The detection unit  18 B can also be added to the arrangements in FIGS. 1,  6 ,  10 ,  11 , and  14 . 
     A storage unit  1 B stores and manages setting information input by the user via an input unit  7 A in advance, or search conditions. 
     When the detection unit  18 B detects that expendables have run out, the search conditions stored in the storage unit  1 B are referred to, and a search instruction based on the referred conditions is executed by the search unit  18 A in the printing apparatus. 
     FIG. 19 shows an example of the search conditions stored in the storage unit  1 B. 
     Reference numeral  19 D denotes information for identifying the type of printing apparatus. 
     Reference numeral  19 D denotes information which represents the type of each expendable used in the apparatus, and includes pieces of type information corresponding to paper  19 A, ink  19 B, and a photosensitive body  19 C; and  19 F, information including pieces of stock information (stock quantities of expendables) corresponding to the respective expendables  19 A,  19 B, and  19 C. The stock information  19 F has a function of decrementing the stock quantity of expendables by the use amount of expendables calculated by the detection unit  18 B or the number of newly exchanged expendables. 
     Reference numeral  19 G denotes a stock threshold value. The printing apparatus refers to the stock threshold value and stock information to determine whether to search for a retailer. This function is set when a printing apparatus is used in normal jobs of an office or the like, and expendables must be stocked. A user such as an individual user who does not require any stock needs not use this function. 
     Reference numeral  19 H denotes a search timing as a set value for determining the timing at which search starts on the basis of a remaining period estimated by the detection unit  18 B for which expendables will completely run out, as described above. 
     Reference numeral  19 I denotes search cycle information for determining a cycle for searching for retailer information and expendables information for the respective types of expendables  19 A,  19 B, and  19 C. Searching for retailer information (supplier) is conducted in several times by setting the search cycle, and an user may get expendables cheaper if price of expendables fluctuates or a new retailer and the like appear. 
     Reference numeral  19 J denotes a price condition representing a desired condition which indicates the minimum discount for the price of expendables obtained by search. 
     Reference numeral  19 K denotes the order quantity of expendables which is the number of expendables ordered at once. 
     Reference numeral  19 L denotes a geographical condition representing a desired condition which indicates the distance to the retailer on the basis of, e.g., the address or map position set and stored in the printing apparatus. This condition may be set when an orderer wants to directly receive products. For example, the desired condition is represented as “near”, “walkable”, “twenty or thirty minutes by car” or “none”. The “none” may be used as to expendables such as a photo conductor (photosensitive body) which can be not exchanged by user and is directly delivered by maintenance serviceman in general. 
     The default value of such setting information is input and set via the input unit  7 A by an user who is near the printing apparatus and uses the apparatus, maintenance serviceman, or the like. 
     Other search conditions include the number of days taken for delivery, and the number of days taken to receive purchased products before expendables completely run out. In particular, the number of days taken for delivery, i.e., delivery time information may be set with a margin of about three days. This can prevent in advance a situation in which, e.g., retailer information, which meets set conditions except for the delivery time, is excluded from search results because only the delivery time condition is not satisfied. In addition, a remaining expendable usable period for which the detection unit  18 B ends search, i.e., a search end timing may be set. By setting the search end timing, the user can acquire the search results of retailer information and product information before expendables completely run out. The printing apparatus may employ an arrangement which automatically displays search results on the display unit if the search end timing condition is satisfied (e.g., two days before expendables are predicted to completely run out). In this case, the user can efficiently acquire the search results. It is also achieved to give the order of priority to each item of set conditions, for example price, time of delivery, distance to a retailer and the like, according to the embodiment of this invention. For example, if the high priority is given to price, search results transmitted from the external provider are sorted in cheap order in advance at the external provider and this sorted data are displayed on the display unit of the printing apparatus or on a manager PC explained in the section for third embodiment, by the control unit. As a result, the user can efficiently and easily acquire search results closer to search results which fulfill conditions desired by the user. 
     FIG. 20 is a flow chart showing execution of a search instruction based on the aforementioned search conditions in FIG. 19 by the search unit  18 A. 
     In step S 2002 , the detection unit  18 B detects the remaining amount of expendables used in the printing apparatus, and calculates a remaining period for which the expendables will completely run short. 
     In step S 2003 , whether the remaining expendable service life calculated in step S 2002  is equal to or shorter than a period designated by a search timing is checked. If No in step S 2003 , the flow returns to step S 2002 ; and if Yes, whether the stock information (stock quantity of expendables)  19 F and the stock threshold value  19 G are set in the printing apparatus is checked in step S 2004 . For an individual user who does not require any stock, the stock information (stock quantity of expendables)  19 F and the stock threshold value  19 G are not set and are invalid (NO in step S 2004 ). 
     If No in step S 2004 , the search unit  18 A issues in step S 2005  a search instruction based on the search conditions set and stored in the storage unit  1 B and transmits the search instruction to the communication unit  15 A, and then a communication process based on the search instruction to the external provider  15 B connected to the printing apparatus via the Internet is conducted by the communication unit  15 A. 
     If Yes in step S 2004 , whether the set stock quantity of expendables is equal to or smaller than the stock threshold value is determined in step S 2006 . Note that the present invention assumes that determination in step S 2006  includes determination of whether stock information (stock quantity of expendables) is smaller than the threshold value. 
     If No in step S 2006 , the flow advances to step S 2002 ; and if Yes, the search unit  18 A issues in step S 2005  a search instruction based on the search conditions set and stored in the storage unit  1 B and transmits the search instruction to the communication unit  15 A, and then a communication process based on the search instruction to the external provider  15 B connected to the printing apparatus via the Internet is conducted by the communication unit  15 A. 
     The search process based on the search instruction of the printing apparatus is executed by the provider  15 B on the basis of a database which stores retailer information, expendable information, and the like in the provider  15 B connected outside the printing apparatus. 
     The retailer information and expendable information collected in the database of the provider  15 B are transmitted from, e.g., the terminal device  18 C of each retailer or an external server (not shown) connected outside the provider. 
     If the search instruction starts once under the search conditions stored in the storage unit  1 B in step S 2005 , the search instruction is repeated in a set cycle until a communication unit  15 A completes an order instruction input by the user via the input unit  7 A, until the detection unit  18 B recognizes attachment of new expendables, or until a end timing designated by the use. 
     FIG. 18 shows only one retailer terminal  18 C. However, the present invention assumes an arrangement in which a plurality of retailer terminals  18 C and an external server are connected to the provider  15 B. Pieces of information from these retailer terminals and the external server are stored in and managed by the provider  15 B. 
     Information searched by the provider  15 B or the like in accordance with the search instruction is notified to the printing apparatus using a communication technique such as electronic mail and the printing apparatus receives the information. Further, the present invention also assumes that search results in the provider  15 B are stored in the internal database of the provider  15 B, and the printing apparatus is notified of only a URL or the like for browsing the database which stores the search results. 
     Pieces of information received by the printing apparatus in this way are stored and held in the storage unit  1 B of the printing apparatus. The control means (CPU) of the printing apparatus displays the stored/held search result list on the display unit in accordance with a search result list call instruction by the user. When the printing apparatus is notified of the above-mentioned URL or the like, the printing apparatus, which internally stores a Web browser or the like for browsing the Internet, browses database information of the provider  15 B using the Web browser. 
     FIGS. 21A and 21B show an example of a display window displayed on the display unit by the control means (CPU) in accordance with the search result list call instruction by the user. A column  21 A displays search conditions, which correspond to the conditions shown in FIG. 19. A column  21 B shows search results corresponding to the conditions of the column  21 A, and represents the unit price of a product, the minimum order quantity of expendables, the location of a retailer, the number of days required for delivery, and remarks. The column  21 B displays information provided by a retailer in addition to information corresponding to the search conditions. Information about the location of a retailer also includes a URL. Although not shown, if this display function is equipped with a function of sorting pieces of display information in the order of the price or in ascending order of the delivery time, a function more convenient for the user is realized, which is also assumed in the present invention. For example, a sort key is attached to the input unit  7 A. With this arrangement, when the user requires supply of expendables, he/she can easily obtain useful expendable information from pieces of expendable information updated in the provider by a plurality of retailers, and can purchase expendables under desired conditions without any consciousness of out-of-expendable information or stock information. The search unit  18 A transmits search instructions to the communication unit  15 A only if necessary and the communication unit  15 A executes it, which reduces the communication cost. Since retailer information and expendable information are periodically searched at a predetermined timing, the user can acquire expendable information updated every moment. 
     As another embodiment, the present invention also assumes an arrangement in which search results as described above are transmitted from a plurality of printing apparatuses such as a printer, FAX, copying machine, and composite machine to a manager computer connected in a connection network environment. With this arrangement, the manager can centralize the expendable order statuses of a plurality of computers. 
     (Third Embodiment) 
     In the above embodiment, search results are displayed on the display unit of a printing apparatus, or search conditions are set via the input unit of the printing apparatus. In the third embodiment, display of search results, setting of search conditions, and the like are performed by an expendable management computer installed on a LAN communicably connected to a printer, copying machine, FAX, personal computer, server apparatus, and the like. 
     The system configuration is shown in FIG.  22 . The arrangements of a copying machine, printer, and the like shown in FIG. 22 are the same as that of the above-described printing apparatus. 
     The arrangement of a manager computer is the same as that of a general-purpose computer, and a detailed description thereof will be omitted. This manager computer comprises at least a storage unit for storing a control program and various data, a display unit for displaying information, an input unit for inputting information, a communication unit for transmitting/receiving data, and a control unit for integrally controlling the storage unit, display unit, input unit, and communication unit. 
     Printing apparatuses such as a copying machine and printer have the same arrangement as that shown in FIG.  18 . Each printing apparatus has a detection unit  18 B. The detection unit  18 B transmits the consumed amount or remaining amount of expendables to a manager computer  220 . 
     The manager computer stores search condition information as shown in FIG. 19 for each of a plurality of devices such as a printer and copying machine. The display unit displays pieces of search condition information, and the manager can browse them. 
     The display unit of the manager computer displays a setting window for setting search conditions, and the manager can set search conditions as shown in FIG. 19 on the setting window for each device. When the manager computer manages many devices, the display unit displays a setting window capable of setting search conditions for all the devices at once. 
     The manager computer issues a search instruction based on set conditions to an external provider. When the search instruction is to be executed from the manager computer, e.g., a search time zone can be further set in the search conditions in FIG. 19, and a time during which the manager computer is not used can be designated. Such condition can also be applied to the printing apparatus described in the above embodiment. The search sequence based on search conditions is the same as the flow chart of FIG. 20 explained in the second embodiment except that remaining amount detection information in step S 2002  is notified from the printing apparatus to the manager computer, and that the processes in steps S 2002  to S 2006  are performed by the manager computer. 
     A search result list may be notified by electronic mail from a provider  15 B to the manager computer via the Internet. Alternatively, search results may be stored and managed in the internal database of the provider  15 B, and a URL for accessing the database may be notified to the manager computer. 
     FIGS. 23A and 23B show an example of a display window displayed on the display unit, e.g., CRT of the manager computer. A column  23 A shows search conditions, similar to FIG.  21 . The difference from FIG. 21 is that the manager computer manages a plurality of devices and thus manages at once devices which use the same kind of expendables. At this time, pieces of stock information of expendables used in two types (AAA and GGG) of printing apparatuses are set, as represented by stock information (stock quantity of expendables) in the column  23 A corresponding to FIG.  19 . 
     A column  23 B displays search results corresponding to the condition of column  23 A. 
     In this fashion, the manager computer can set retailer information search conditions concerning purchase of expendables of a plurality of printing apparatuses, so conditions need not be intentionally set via the input unit of each printing apparatus. In addition, expendables of printing apparatuses which use the same kind of expendables can be managed at once, and a search result list about a plurality of devices can be browsed and managed at once by the manager computer. Hence, expendables can be efficiently managed. 
     As another embodiment in accordance with the present invention, the fourth embodiment applying the ordering process in the first embodiment to the second or third embodiment is provided. For example, in the fourth embodiment, ordering buttons (not shown in the drawings) corresponding to each of retailers included in a search result displayed on the display unit of the printing apparatus or manager computer as shown in FIG. 21 or  23  is provided and displayed. The printing apparatus, CPU in the manager computer or the like determines whether or not there is input to the ordering buttons. Applying such an input determination to the process in the step S 162  shown in FIG. 15, it can be achieved to add the ordering function to the functions of the second or third embodiment. 
     Further, applying step S 204  in the flowchart shown in FIG. 2 to the process of step S 2003  shown in FIG. 20 or step S 2003  in the third embodiment shown in FIG. 20, another embodiment as fifth embodiment of the present invention is provided wherein search instruction based on the search conditions shown in FIG. 19 is conducted by the printing apparatus or the manager computer when the number of papers used in the printing apparatus is less than a predetermined amount. 
     Further, if search instructions in the printing apparatus in the second embodiment is conducted to the manager computer in the third embodiment, another embodiment as sixth embodiment of the present invention is provided wherein the whole search of a plurality of the printing apparatuses can be conducted on the manager computer. For example, if the search instructions (search requirement) based on the search conditions stored in each printing apparatus such as the copying machine, printer shown in FIG.  22  and the like are transmitted to the manager computer, the manager computer manages circumstances of the search requirements received from the printing apparatus and can display the circumstances by display control means. Ordering control means (control means) of the manager computer collectively operates a plurality of the search requirements from the printing apparatuses, so that a plurality of the search requirements from the printing apparatuses to the external provider can be collectively conducted. 
     In this case, if the search requirements of the printing apparatuses are transmitted to the manager computer with the search conditions, control means of the manager computer can conduct the search instructions corresponding to the search conditions of the printing apparatus to the external provider collectively. As a result, the communication cost will be reduced more and the manager need not set the search conditions to all the printing apparatuses while the search conditions set on the printing apparatus are set by an user who is near the printing apparatus and, maintenance serviceman, or the like as explained in the second embodiment. Thus the burdens on the manager will be reduced. 
     Further, seventh embodiment, to be applying the sixth embodiment to the ordering process of the fourth embodiment, of the present invention is provided. In the seventh embodiment, search instructions for retailer information (supplier information) are conducted by control means in a manner described in the sixth embodiment, and then ordering buttons corresponding to the supplier information included in the search result are displayed by display control means of the manager computer. When the ordering button is inputted, ordering process will be conducted. 
     Further, the second and third embodiments have exemplified a system of searching for retailer data in a server. As another embodiment, it is also possible that the user inputs conditions and a retailer makes an offer. In this case, the user can obtain good results as for both the cost and delivery time. As a system which provides such environment, retailers who have made offers, and user information are disclosed to make offers and orders more safely between the user and the retailer. That is, information representing occurrence of a delivery time delay or the past transaction amount is disclosed to clear the transaction risk. 
     Accordingly, the user can safely make a transaction with an unknown retailer. 
     Further, the program stored in the storage unit mentioned above and shown in FIGS. 2,  3 ,  12 ,  15 ,  17  and  20  is conducted by the CPU  1 A. 
     As described above, this embodiment can quickly cope with a short supply of expendables. 
     Note that the objects of the present invention are also achieved by supplying a storage medium (or recording medium), which records a program code of a software program that can implement the functions of the above-mentioned embodiments to a system or apparatus, and reading out and executing the program code stored in the storage medium by a computer (or a CPU or MPU) of the system or apparatus. In this case, the program code itself read out from the storage medium implements the functions of the above-mentioned embodiments, and the storage medium which stores the program code constitutes the present invention. The functions of the above-mentioned embodiments may be implemented not only by executing the readout program code by the computer but also by some or all of actual processing operations executed by an OS (operating system) running on the computer on the basis of an instruction of the program code. 
     Furthermore, the functions of the above-mentioned embodiments may be implemented by some or all of actual processing operations executed by a CPU or the like arranged in a function extension card or a function extension unit, which is inserted in or connected to the computer, after the program code read out from the storage medium is written in a memory of the extension card or unit. 
     As many apparently widely different embodiments of the present invention can be made without departing from the spirit and scope thereof, it is to be understood that the invention is not limited to the specific embodiments thereof except as defined in the claims.