Abstract: Disclosed is a control method for an image forming apparatus including firmware and an application operating on the firmware, the control method including registering a size of a defined sheet in a storage unit in accordance with a user operation under control of the firmware, accepting a selection instruction of the registered size of the defined sheet in accordance with the user operation under control of the application, and control printing using the defined sheet having the size according to the selection instruction under the control of the firmware.

Abstract: A processing box, comprising a housing, the housing comprising two end plates located at two opposite ends; and deflectable deflection sliders, being provided at the bottom of the housing, the deflection sliders being provided on the housing by means of a rotating shaft, and being able to rotate on the surface of the bottom wall of the housing. When the processing box is mounted in an image forming device by means of a mounting bracket on the image forming device, the deflection sliders cooperate with a guide portion of the mounting bracket and deflect in accordance with the guide portion of the mounting bracket, so that the processing box can be deflected firstly relative to the image forming device and then be placed properly, thereby facilitating the mounting of the processing box.

Abstract: An image forming apparatus includes a trailing edge regulation guide configured to regulate a trailing edge position of a sheet stored in a sheet storage unit, a detection unit configured to detect a position of the trailing edge regulation guide, an input unit configured to input a sheet size to be set for the sheet storage unit, and a control unit. In the sheet storage unit, an attachment is attachable to the trailing edge regulation guide. The control unit controls display a warning screen in a case where a length in a feeding direction in the sheet size input by the input unit is longer than a predetermined length, whereas the control unit does not to display the warning screen according to the position of the trailing edge regulation guide in a case where the length in the feeding direction is shorter than the predetermined length.

Abstract: An image forming apparatus includes a tray feeder to feed a printing medium placed on a tray of the image forming apparatus to an image former of the image forming apparatus, the tray moveable to be in a first position and a second position, a cassette feeder to feed a printing medium placed in a cassette of the image forming apparatus to the image former, a power train to transmit power generated from a driving motor, and a power switching unit to switch the power transmitted from the power train.

Abstract: An image forming apparatus includes a paper type detection unit, a paper type determination unit, a paper search unit, and a paper change unit. The paper type detection unit detects a type of a paper conveyed from a paper feeding cassette by a sensor. The paper type determination unit determines whether there is a change in the type of the paper during the printing. The paper search unit searches whether there is an appropriate paper feeding cassette for accommodating papers having paper types equal to types of papers before paper types are changed when there is a change in the type of the paper during the printing as a result of the determination. The paper change unit processes the paper with the changed type and resumes conveyance of papers from the existing appropriate paper feeding cassette when there is the appropriate paper feeding cassette as a result of the search.

Abstract: An image forming apparatus capable of printing a non-standard size image on a sheet of a size as desired by the user as possible, and preventing stoppage of printing the image even when there is no sheet of the size desired by the user in a sheet feeder. When image data is for a non-standard size, if there is a sheet feeder accommodating recording sheets of which vertical and lateral lengths corresponding to vertical and lateral lengths represented by the image data are designated, a control unit feeds the sheets from the sheet feeding cassette. If there is no such a sheet feeder, the control unit feeds recording sheets of a free size from a manual feed tray accommodating the recording sheets of the free size.

Abstract: An image forming apparatus settable for a custom size or a standard size includes an index sheet setting section, a print engine control processing section, and a print execution processing section. The index sheet setting section sets information pertaining to an index sheet having an index tab. Based on the information set by the index sheet setting section, the print engine control processing section switches between control in accordance with a setting for the custom size and control in accordance with a setting for the standard size. The print execution processing section executes control of printing on the index sheet.

Abstract: A sheet conveyance apparatus conveys a sheet without imposing a load on a drive unit due to the bend of the sheet when the sheet is conveyed from one unit to the other, and when the sheet is conveyed by a second conveyance unit and a first conveyance unit, a first control unit controls a first drive motor and a second control unit controls a second drive motor to make a sheet conveyance speed of the first conveyance unit equal to or higher than that of the second conveyance unit.

Abstract: Detachable sheet feeding units are connected to an image forming apparatus. A transmitting unit transmits a feeding instruction via a signal line to a sheet feeding unit that is to perform sheet feeding. A first sheet detector, which is placed in the sheet feeding unit, detects a sheet that has been fed from the sheet feeding unit. A second sheet detector is provided downstream of the first sheet detector in terms of the sheet conveyance direction. If the feeding instruction is transmitted and a plurality of sheets are fed from the sheet feeding unit, an image formation controller determines whether to cause the image forming operation to continue or stop based upon whether a sheet-to-sheet interval of a plurality of sheets has been detected by the second sheet detector in a state in which the result of detection by the first sheet detector indicates presence of a sheet.

Abstract: An image forming apparatus which is capable of reducing time and effort for a user in setting a size of an irregular-size sheet. Width information indicative of a width of a sheet set by the user is stored in a storage unit. A width of the sheet held by a sheet holding unit that holds the sheet is detected. From the width information stored in the storage unit, candidates for a size of the sheet are extracted based on the detected width of the sheet. The extracted candidates for a size of the sheet are displayed on a display. A size of the sheet selected by the user from among the displayed candidates for a size of the sheet is set as a size of the sheet held by the sheet holding unit.

Abstract: A presence/absence of paper on first and second stacking units, which are each capable of stacking a predetermined size of paper, is detected by first and second detection units. And in a case where a determination is performed as to whether or not paper of a size larger than the predetermined size is stacked astride the first and second stacking units and it is determined that a large size paper is stacked, a paper remaining amount is displayed based on the detection of either the first or second detection unit, and in a case where it is determined that a large size paper is not stacked, paper remaining amounts are displayed based on the detection of the first and second detection units respectively.

Abstract: A printing apparatus according to an aspect of the present invention includes a plurality of sheet feed trays, stores sheet information including property information indicating a property of a sheet and sheet feed tray information indicating a sheet feed tray to which the sheet is allowed to be assigned, and selects a sheet feed tray from the plurality of sheet feed trays based on a designation made by a user. The printing apparatus further displays a sheet allowed to be assigned to the selected sheet feed tray based on the stored sheet information and assigns, to the selected sheet feed tray, a sheet designated by the user from among the displayed sheets.

Abstract: A printing apparatus which makes it possible to reduce time and labor required by the operator for paper assignment and suppress occurrence of an operation error during execution of the paper assignment. The printing apparatus is provided with a plurality of paper feeders for containing papers. Information on types of papers to be contained in the respective paper feeders is set as a paper assignment configuration. The printing apparatus selects a specific paper assignment configuration, based on an instruction from the operator, from paper assignment configurations stored in a storage device. The selected specific paper assignment configuration is set as the current paper assignment configuration.

Abstract: In a printing system which feeds a sheet from a plurality of sheet storage units and prints an image on the fed sheet, and a control method thereof, when a sheet storage unit selected as a paper feed source does not store sheets of a size designated by a print job, and a sheet storage unit which stores sheets of the size designated by the print job does not exist in a group to which the selected sheet storage unit belongs, the user is notified of a sheet storage unit in the group as a sheet storage unit which should store sheets.

Abstract: An image forming device includes an image recording unit for recording an image on a recording sheet, an upper paper feed cassette storage unit arranged above the image recording unit, a lower paper feed cassette storage unit arranged below the image recording unit, a lower paper feed cassette stored in the lower paper feed cassette storage unit, and an upper paper feed cassette stored in the upper paper feed cassette storage unit. The upper paper feed cassette has a larger lateral length than that of the lower paper feed cassette.

Abstract: A paper feed apparatus capable of properly feeding various types of sheets is described. The paper feed apparatus includes a plurality of paper feed units, and a control unit which determines the printing suitability of a combination of the sheet and the paper feed unit on the basis of the size and stiffness of the sheet stored in the paper tray. Each of the paper feed units includes a paper tray, a paper feeding device for feeding sheets, and conveyance rollers for conveying sheets fed from the paper feeding device. The plurality of paper feed units include at least one first paper feed unit configured in order that a sheet enters the conveyance rollers through a conveying route which is curved, and at least one second paper feed unit configured in order that a sheet enters the conveyance rollers through a conveying route which is linear.

Abstract: The embodiment described herein can prompt setting of processing conditions to be set by using a display of a weight value used in a quota function. There is provided an image forming apparatus, including: a residual amount detection unit that detects a residual amount of each disposable product; a residual amount information acquisition unit that acquires residual amount information; a determination unit that determines whether there are the disposable products in which a residual amount is disproportionately small; a weight value setting unit that sets the weight value used for weighting so that the weighting for calculating the processing amount of the image forming processing corresponding to setting conditions not using the disposable products having a disproportionately small residual amount is relatively smaller than the weighting corresponding to other setting conditions; and a display control unit that displays the set weight value on a screen.

Abstract: An image forming apparatus which is capable of reducing time and effort for a user in setting a size of an irregular-size sheet. Width information indicative of a width of a sheet set by the user is stored in a storage unit. A width of the sheet held by a sheet holding unit that holds the sheet is detected. From the width information stored in the storage unit, candidates for a size of the sheet are extracted based on the detected width of the sheet. The extracted candidates for a size of the sheet are displayed on a display. A size of the sheet selected by the user from among the displayed candidates for a size of the sheet is set as a size of the sheet held by the sheet holding unit.

Abstract: An image forming apparatus capable of printing a non-standard size image on a sheet of a size as desired by the user as possible, and preventing stoppage of printing the image even when there is no sheet of the size desired by the user in a sheet feeder. When image data is for a non-standard size, if there is a sheet feeder accommodating recording sheets of which vertical and lateral lengths corresponding to vertical and lateral lengths represented by the image data are designated, a control unit feeds the sheets from the sheet feeding cassette. If there is no such a sheet feeder, the control unit feeds recording sheets of a free size from a manual feed tray accommodating the recording sheets of the free size.

Abstract: An image recording apparatus includes a body, a tray, a moving member, an actuator, a sensor, a reference position moving mechanism and a control unit. The moving member is movable to a first position, a second position, a third position and a reference position. The actuator moves the moving member to the first position, the second position and the third position. The sensor outputs an ON signal or an OFF signal based on positions of the moving member, the positions including the first position, the second position, the third position and the reference position. The reference position moving mechanism moves the moving member to the reference position. The control unit determines a detection position to be detected based on a change of the ON signal and the OFF signal of the sensor when the moving member is moved between the detection position and the reference position by the reference position moving mechanism.

Abstract: A paper feeder, a control method thereof, and an image forming apparatus having the same are provided. The paper feeder includes a moving member to push paper loaded on one paper loader to another empty paper loader. With regard to operation of the moving member, the stop time of the moving member may be variable based on a paper size input by a user, which enables a stop position of the moving member to be automatically adjusted based on the paper size, resulting in enhanced user convenience.

Abstract: This invention relates to a printing apparatus and control method thereof. The standard size of an envelope to be stored in each of a plurality of paper storage units configured to store an envelope to be used in printing is set. An offset amount to be used to print an image on an envelope of the set standard size is set. A paper storage unit which stores an envelope to be used in printing is selected from the plurality of paper storage units based on a standard size of an envelope that is designated by a user. The position of an image is shifted in accordance with the set offset amount, and the image is printed on an envelope fed from the selected paper storage unit.

Abstract: An information processing apparatus connected to an image forming apparatus includes: a size detecting unit that detects a size of each page of a document to be printed; an orientation detecting unit that detects orientation of each page of the document; a receiving unit that receives a setting of post processing that is to be performed on a printed sheet on which the document is printed; a determining unit that determines whether pages of different sizes, both having one side of the same length and other sides of different lengths, are detected in the document; a rotation control unit that, when the determining unit determines that the pages of the different sizes have been detected, rotates pages so that sides of the same length are aligned on the basis of the setting of the post processing; and an output unit that outputs the document with the pages rotated.

Abstract: An image forming apparatus which is capable of reducing time and effort for a user in setting a size of an irregular-size sheet. Width information indicative of a width of a sheet set by the user is stored in a storage unit. A width of the sheet held by a sheet holding unit that holds the sheet is detected. From the width information stored in the storage unit, candidates for a size of the sheet are extracted based on the detected width of the sheet. The extracted candidates for a size of the sheet are displayed on a display. A size of the sheet selected by the user from among the displayed candidates for a size of the sheet is set as a size of the sheet held by the sheet holding unit.

Abstract: An image forming apparatus capable of printing a non-standard size image on a sheet of a size as desired by the user as possible, and preventing stoppage of printing the image even when there is no sheet of the size desired by the user in a sheet feeder. When image data is for a non-standard size, if there is a sheet feeder accommodating recording sheets of which vertical and lateral lengths corresponding to vertical and lateral lengths represented by the image data are designated, a control unit feeds the sheets from the sheet feeding cassette. If there is no such a sheet feeder, the control unit feeds recording sheets of a free size from a manual feed tray accommodating the recording sheets of the free size.

Abstract: An image forming apparatus is provided that can efficiently reduce power consumption. The image forming apparatus includes a power supply portion that brings, into a power saving state, a paper feed device holding a sheet of a sheet size whose paper feed frequency does not reach a threshold value and a notification portion that provides a notification that a paper feed device holding the sheet of the sheet size whose paper feed frequency reaches the threshold value is encouraged to be the paper feed device that is closer to the print portion than the paper feed device holding the sheet of the sheet size whose paper feed frequency does not reach the threshold value.

Abstract: Disclosed are document imaging systems and methods which provide cleaning and cooling of various components associated with an image scanning system. According to one exemplary embodiment of this disclosure, provided is a document imaging system including a flexible, accordion style, duct which draws air through a vacuum slot between a light source and optical sensor associated with the scanning system. The resulting air flow provides cleaning of the imaging platen and provides cooling/cleaning of the light source and optical sensor.

Abstract: A user is notified that the setting of sheets with respect to a grouped plurality of sheet storage units is changed, so that a state becomes impossible to execute switching of the grouped sheet storage units. The control method includes, registering a plurality of sheet storage units each storing a sheet as one group, determining, at the time of sheet supply to any one of the sheet storage units, whether sheet information about the sheet storage unit set in the group has been changed by sheet information newly set with respect to the sheet storage unit to be supplied with the sheet, and a notifying, when it is determined that the sheet information has been changed, the user of the change in the sheet information about the sheet storage units set as one group by the supply of the sheet.

Abstract: A sheet identification device includes plural detecting units, an estimating unit, and an output unit. The plural detecting units are provided along a transport path along which a sheet is transported by a transport unit, and detect passing of the sheet. The estimating unit estimates a length in a transport direction of the sheet as a detection target on the basis of individual detection results generated by the plural detecting units. The output unit outputs, if the length estimated by the estimating unit on the basis of at least one of the detection results is not a predetermined length, a signal indicating that a sheet having a length in the transport direction different from the predetermined length is being transported.

Abstract: A printing apparatus according to an aspect of the present invention includes a plurality of sheet feed trays, stores sheet information including property information indicating a property of a sheet and sheet feed tray information indicating a sheet feed tray to which the sheet is allowed to be assigned, and selects a sheet feed tray from the plurality of sheet feed trays based on a designation made by a user. The printing apparatus further displays a sheet allowed to be assigned to the selected sheet feed tray based on the stored sheet information and assigns, to the selected sheet feed tray, a sheet designated by the user from among the displayed sheets.

Abstract: A method for printing including receiving, by a printer, a first page image, a second page image, and a selection for enabling media type substitution. The printer identifies a preferred media type and an alternate media type, where the preferred media type and the alternate media type include a common printable area (CPA), and the first page image and the second page image are modified to match a dimension of the CPA. The printer then selects the preferred media type for printing the first page image. The printer receives a message, after receiving the selection enabling media type substitution, associated with the preferred media type after selecting the first media type. The printer then selects the alternate media type in response to the message and the selection enabling media type substitution, and prints the second page image using the alternate media type.

Abstract: A detecting member 35 has three substantially rectangular plate-shaped detecting plates 51a, 51b, and 51c formed integrally therewith which are arranged to face an arc-shaped portion 33a of a following member 33. The detecting plates 51a, 51b, and 51c are, at one end, supported on a main portion 50, and are composed of base-end portions R1, with which, at their reverse side, a prop 60 makes contact, and swing portions R2, which are located on the tip-end side of the base-end portions R1 and with which protrusions 43a and 43b on the arc-shaped portion 33a make contact. The base-end portions R1 have a wider elastically deformable range than the swing portions R2.

Abstract: An image forming apparatus capable of printing a non-standard size image on a sheet of a size as desired by the user as possible, and preventing stoppage of printing the image even when there is no sheet of the size desired by the user in a sheet feeder. When image data is for a non-standard size, if there is a sheet feeder accommodating recording sheets of which vertical and lateral lengths corresponding to vertical and lateral lengths represented by the image data are designated, a control unit feeds the sheets from the sheet feeding cassette. If there is no such a sheet feeder, the control unit feeds recording sheets of a free size from a manual feed tray accommodating the recording sheets of the free size.

Abstract: An image forming apparatus capable of printing a non-standard size image on a sheet of a size as desired by the user as possible, and preventing stoppage of printing the image even when there is no sheet of the size desired by the user in a sheet feeder. When image data is for a non-standard size, if there is a sheet feeder accommodating recording sheets of which vertical and lateral lengths corresponding to vertical and lateral lengths represented by the image data are designated, a control unit feeds the sheets from the sheet feeding cassette. If there is no such a sheet feeder, the control unit feeds recording sheets of a free size from a manual feed tray accommodating the recording sheets of the free size.

Abstract: A paper feeder, a control method thereof, and an image forming apparatus having the same are provided. The paper feeder includes a moving member to push paper loaded on one paper loader to another empty paper loader. With regard to operation of the moving member, the stop time of the moving member may be variable based on a paper size input by a user, which enables a stop position of the moving member to be automatically adjusted based on the paper size, resulting in enhanced user convenience.

Abstract: In a printing system which feeds a sheet from a plurality of sheet storage units and prints an image on the fed sheet, and a control method thereof, when a sheet storage unit selected as a paper feed source does not store sheets of a size designated by a print job, and a sheet storage unit which stores sheets of the size designated by the print job does not exist in a group to which the selected sheet storage unit belongs, the user is notified of a sheet storage unit in the group as a sheet storage unit which should store sheets.

Abstract: A paper feeder, a control method thereof, and an image forming apparatus having the same are provided. The paper feeder includes a moving member to push paper loaded on one paper loader to another empty paper loader. With regard to operation of the moving member, the stop time of the moving member may be variable based on a paper size input by a user, which enables a stop position of the moving member to be automatically adjusted based on the paper size, resulting in enhanced user convenience.

Abstract: When a paper sheet is required during execution of a print job, a printing apparatus requests paper sheet information about the states of paper feed trays from the other printing apparatuses. When the other printing apparatuses transmit the paper sheet information, the printing apparatus of the request source displays a search result display screen 22 which represents the states, such as the size, type, and residual amount of paper sheet in the paper feed tray of each of the other printing apparatuses. By viewing the screen 22, the user is able to determine the position of the printing apparatus and the paper feed tray, in which the required paper sheet is stored. Therefore, when the paper sheet is required during execution of the print job, the paper sheet can be quickly replenished by notifying the presence position of the paper sheet.

Abstract: Methods and apparatuses for forming images on recording media of different sizes are provided. The image forming procedure may include reading setting information which includes the size of a substitute recording medium for each user from a memory and, when the size of the recording medium specified by the print instruction is not available, executing a print instruction by automatically changing the size of a recording medium to be used to the size of the substitute recording medium based on the setting information. Additional computer-readable storage media storing image forming procedures are also provided.

Abstract: An image forming apparatus capable of printing a non-standard size image on a sheet of a size as desired by the user as possible, and preventing stoppage of printing the image even when there is no sheet of the size desired by the user in a sheet feeder. When image data is for a non-standard size, if there is a sheet feeder accommodating recording sheets of which vertical and lateral lengths corresponding to vertical and lateral lengths represented by the image data are designated, a control unit feeds the sheets from the sheet feeding cassette. If there is no such a sheet feeder, the control unit feeds recording sheets of a free size from a manual feed tray accommodating the recording sheets of the free size.

Abstract: Described is an image forming apparatus, which makes it possible to create a vacant tray. The apparatus includes a paper sheet managing section to conduct consecutive operations including: acquiring the residual amount of the paper sheets accommodated in each of plurality paper sheet trays; calculating a total sum of residual amounts of paper sheets having the same attributes; comparing the above-calculated total sum with the maximum accommodating capacity of each of the paper sheet trays currently accommodating the paper sheets concerned; and notifying the operator of the fact that a vacant tray can be made by collecting the paper sheets concerned into a specific paper sheet tray, if there exists such paper sheets and a combination of paper sheet trays that make the total sum of the residual amounts of the paper sheets equal to or smaller than the maximum accommodating capacity of the specific paper sheet tray.

Abstract: A method of controlling medium feeding in an image forming apparatus includes an image forming step of forming an image on a medium in response to an image forming request, and a feed control step of selecting one of a plurality of first medium feed units that feeds a medium corresponding to attribute information that matches medium attribute information included in the image forming request, and of selecting a second medium feed unit upon finding matching between attribute information indicative of a medium fed by the second medium feed unit and the medium attribute information included in the image forming request if none of the first medium feed units feeds a medium corresponding to the attribute information that matches the medium attribute information included in the image forming request.

Abstract: A recording apparatus according to an aspect of the invention includes a sheet feeding cassette that can accommodate a stack of recording materials; a pick-up roller that comes into contact with the top recording material of the recording materials accommodated in the sheet feeding cassette to feed the recording material; a roller holder that is supported at a base end so as to be rotatable and has the pick-up roller at a tip, the pick-up roller being pressed against the recording material; and a lever that is supported at a base end so as to be rotatable and has a pressing portion at a tip, the pressing portion being pressed against the recording material. The lever is disposed on the roller holder and is supported coaxially with the roller holder.

Abstract: Various apparatus and methods relating to positioning differently sized sheets on a shuttle for printing are disclosed.

Abstract: A paper feeder includes a storage section, a feed path, a delivery section, and a receiving section. The storage section is configured to store therein plural sheet members to be fed to a processing apparatus which is operative to perform processing on the sheet members. The feed path allows each of the plural sheet members fed from the storage section to pass therethrough in a feed direction toward the processing apparatus. The delivery section is located most downstream on the feed path in the feed direction. The feed path is open to exterior in the delivery section. The receiving section is located upstream of the feed path in the feed direction for communication with a delivery section of a separate paper feeder having an identical construction with the present paper feeder when the separate paper feeder is disposed upstream of the present paper feeder in the feed direction.

Abstract: An image forming apparatus which is capable of feeding paper from a paper feeding unit when paper types set in selected paper feeding units are all the same type even if the selected paper feeding units do not include a paper feeding unit in which a predetermined paper type is set. At least one of paper feeding portions stacking a paper with the designated paper size is selected based on an attribute set to each of a plurality of paper feeding portions. in a case where a selected plurality of paper feeding portions do not include a paper feeding portion set with the predetermined attribute when the attributes set to the selected plurality of paper feeding portions are the same, a paper is fed to the image forming unit from any one of the selected plurality of paper feeding portions.

Abstract: A burden on a user when changing sheets such as with an ink jet printer and the like is reduced, and the necessary stack space is secured without considering the step difference up to the mounting surface of an ejected paper tray worth of the amount of curls for sheets that easily curls such as post cards and the like. Thus, enlargement of the apparatus and increase in the manufacturing cost are suppressed, and is easily adopted for low cost type for mass consumption.

Abstract: An image forming unit includes an image forming device that forms an image on a recording medium disposed at a lower portion thereof, a device frame that supports the image forming device at the lower portion, having a first attaching portion to which to attach a first storage frame and a second attaching portion to which to attach a second frame. Either a first storage unit or a second storage unit is attached to the image forming unit. The first storage unit includes a first storage tray having a first storage capacity, a first guide member and the first storage frame. The second storage unit includes a second storage tray having a second storage capacity larger than the first storage capacity, the second guide member and the second storage frame.

Abstract: A weighing apparatus and method for measuring the weight of articles fed along a processing path. The weighing apparatus includes multiple segments, i.e., a primary scale segment adapted to weigh articles of a first configuration, and at least one secondary scale segment adapted to cooperate with the primary segment to weigh articles of a second configuration. The articles of the second configuration are larger than those of the first configuration in at least one dimension or direction. Inasmuch as the articles are fed along a processing path, a conveyor or transport means is provided to feed the articles to the scale segments. The conveyor may be controlled to momentarily pause the articles over each scale segment to obtain an accurate weight measurement. The weight measurement apparatus is particularly well-suited for use in mailing machines to calculate the value of postage indicia.

Abstract: The present invention relates to an automatic document feeder having a document size detecting device. The document size detecting device includes a first paper guide plate, a second paper guide plate, a first elongated perforation, a second elongated perforation, a rack movement mechanism and a plurality of sensing members. The first paper guide plate includes a first paper stopping slice, a first rack and a rib, wherein the rib is disposed on the bottom of the paper input tray. The second paper guide plate includes a second paper stopping slice and a second rack. By moving the first paper guide plate to have the rib located between an optical emitter and an optical receiver of a specified sensing member, the size of the document placed on the paper input tray is realized.