Abstract: An image forming apparatus can include an image forming unit that prints a plurality of toner images formed by using toners of first, second and third toners onto a recording material in a superimposed manner, the image forming unit forms first to third toner images; a transfer unit for transferring onto the recording material in a superimposed manner the first to third toner images in this order, which is an order closer to the recording material; and a fixing unit including heating unit for heating the recording material from the side where the toner images are transferred, the fixing unit being configured to heat and melt the toner images to fix the toner images onto the recording material. Among the first to third toners, the first toner has the highest elastic modulus, and the second toner has the lowest elastic modulus.

Abstract: An image forming apparatus includes a photosensitive member, first and second charging members, a developing member, a transfer member, first and second charging voltage applying portions, a transfer voltage applying portion, and a controller. The controller controls the transfer voltage applying portion so that a region of at least a part of the photosensitive member surface contacting the transfer member in a transfer position has a potential of an opposite polarity to the predetermined polarity, controls the first charging voltage applying portion so that the surface of the photosensitive member is charged in a first charging position by applying a first charging voltage of less than a discharge start voltage, and controls the second charging voltage applying portion so that the surface of the photosensitive member is charged in a second charging position by applying a second charging voltage of not less than the discharge start voltage.

Abstract: An image forming apparatus at least comprising: first image forming means for forming a first adhesive layer of a first toner on a sheet; and second image forming means for forming a second adhesive layer of a second toner on the first adhesive layer, adhesive image patterns are formed from the first and the second adhesive layer, the image forming apparatus further comprising specific booklet bonding means, wherein at least both the first and the second adhesive layer are formed on one of a first sheet and a second sheet that face each other in the sheet bundle, at least the first adhesive layer is formed on the other of the first sheet and the second sheet, and G1>G2 is satisfied, where G1 denotes a storage elastic modulus of the first toner, and G2 denotes a storage elastic modulus of the second toner.

Abstract: A cover component is disposed at a position to abut on at least one fastening screw exposed on a back surface of a scientific calculator when the cover component is attached to the back surface of the scientific calculator.

Abstract: A cover component attachable to and detachable from an electronic device body includes a hook part and a protrusion. The hook part stands in a first direction and engages a recess provided in a lateral face of the electronic device body. The protrusion regulates a position of the electronic device body in the first direction by the protrusion and a rib being superposed when the cover component is attached to the electronic device body. The rib is provided adjacent to the recess in the lateral face of the electronic device body.

Abstract: An image forming apparatus includes a photosensitive member, first and second charging members, a developing member, a transfer member, first and second charging voltage applying portions, a transfer voltage applying portion, and a controller. The controller controls the transfer voltage applying portion so that a region of at least a part of the photosensitive member surface contacting the transfer member in a transfer position has a potential of an opposite polarity to the predetermined polarity, controls the first charging voltage applying portion so that the surface of the photosensitive member is charged in a first charging position by applying a first charging voltage of less than a discharge start voltage, and controls the second charging voltage applying portion so that the surface of the photosensitive member is charged in a second charging position by applying a second charging voltage of not less than the discharge start voltage.

Abstract: A controller of an image forming apparatus controls a transfer voltage applying portion so that a voltage is not applied to a transfer member or a voltage of an opposite polarity to a normal charge polarity of toner is applied to the transfer member, in a first period including at least a period, after rotation of a photosensitive member and a developing member, from first arrival of a first region at a transfer portion to first arrival of a second region at the transfer portion, and so that at least a first voltage of the same polarity as the normal charge polarity and a second voltage of the same polarity as the first voltage and larger in absolute value than the first voltage are applied to the transfer member in a second period after the first period and before a toner image reaches the transfer portion.

Abstract: An electronic device includes an operation button having a flange, and a device case formed with an opening into which the operation button is inserted. The device case is provided with a guide rib that guides reception of the flange into a region. At least a part of the guide rib is configured such that an interval between the flange and the guide rib is widened when a pressing operation is performed toward a pressing direction of the operation button.

Abstract: A scientific calculator includes a liquid crystal display and a protective panel that supports a back surface of the liquid crystal display. The protective panel includes a plurality of ribs erected on a main surface opposite to the liquid crystal display, and a plurality of recesses surrounded by the plurality of ribs. The plurality of recesses include those having non-uniform sizes.

Abstract: An electronic device includes an operation button having a flange, and a device case formed with an opening into which the operation button is inserted. The device case is provided with a restricting portion that does not overlap the flange when the operation button is inserted into the opening in an orientation, and that overlaps the flange when the operation button is to be inserted into the opening in an orientation other than the orientation.

Abstract: An image forming apparatus at least comprising: first image forming means for forming a first adhesive layer of a first toner on a sheet; and second image forming means for forming a second adhesive layer of a second toner on the first adhesive layer, adhesive image patterns are formed from the first and the second adhesive layer, the image forming apparatus further comprising specific booklet bonding means, wherein at least both the first and the second adhesive layer are formed on one of a first sheet and a second sheet that face each other in the sheet bundle, at least the first adhesive layer is formed on the other of the first sheet and the second sheet, and G1>G2 is satisfied, where G1 denotes a storage elastic modulus of the first toner, and G2 denotes a storage elastic modulus of the second toner.

Abstract: An image forming apparatus can include an image forming unit that prints a plurality of toner images formed by using toners of first, second and third toners onto a recording material in a superimposed manner, the image forming unit forms first to third toner images; a transfer unit for transferring onto the recording material in a superimposed manner the first to third toner images in this order, which is an order closer to the recording material; and a fixing unit including heating unit for heating the recording material from the side where the toner images are transferred, the fixing unit being configured to heat and melt the toner images to fix the toner images onto the recording material. Among the first to third toners, the first toner has the highest elastic modulus, and the second toner has the lowest elastic modulus.

Abstract: An image forming apparatus includes a photosensitive drum and an exposure unit for exposing a surface of the photosensitive drum to form an image by a first exposure amount. In a rotational axis direction of a charging portion, a width of a transfer portion is shorter than that of a developing portion, a width of the transfer portion is shorter than that of the charging portion and an end portion of the surface includes a non-transfer area in contact with the charging portion and not in contact with the transfer portion. The voltage having the normal polarity is applied to the transfer portion when no recording material exists at the transfer portion, and the exposure unit exposes an area, including the non-transfer area of the surface that has passed through the transfer portion during application of the voltage, by a second exposure amount less than the first exposure amount.

Abstract: An image forming apparatus includes a photosensitive drum, a charging member, an exposure unit, a developing member, and a transfer member. In a rotational axis direction of the charging member, a width of a transfer portion of the transfer member is shorter than that of a charging portion of the charging member, and an end of the surface of the photosensitive drum in the axis direction includes a non-transfer area in contact with the charging member and not in contact with the transfer member. The exposure unit exposes the non-transfer area during rotation of the photosensitive drum, and forms a surface potential on the surface downstream of an exposing portion and upstream of the transfer portion with respect to a rotational direction. A controller controls such that an absolute value of the surface potential of the non-transfer area is lower than that of the transfer outside paper passing area.

Abstract: An image forming apparatus includes an image forming unit configured to form a toner image on a recording material, a fixing unit configured to fix the toner image formed on the recording material by the image forming unit to the recording material, and a controller configured to cause the image forming unit to form an image on a basis of image information, the controller being configured to cause the image forming unit to form the image in which a first toner image and a second toner image is superimposed on each other on the recording material, the first toner image being a toner image corresponding to the image information, the second toner image being constituted by a pattern having anisotropy such that glossiness of the image changes depending on a direction in which the image is viewed.

Abstract: A controller of an image forming apparatus controls a transfer voltage applying portion so that a voltage is not applied to a transfer member or a voltage of an opposite polarity to a normal charge polarity of toner is applied to the transfer member, in a first period including at least a period, after rotation of a photosensitive member and a developing member, from first arrival of a first region at a transfer portion to first arrival of a second region at the transfer portion, and so that at least a first voltage of the same polarity as the normal charge polarity and a second voltage of the same polarity as the first voltage and larger in absolute value than the first voltage are applied to the transfer member in a second period after the first period and before a toner image reaches the transfer portion.

Abstract: An image forming apparatus includes a photosensitive drum and an exposure unit for exposing a surface of the photosensitive drum to form an image by a first exposure amount. In a rotational axis direction of a charging portion, a width of a transfer portion is shorter than that of a developing portion, a width of the transfer portion is shorter than that of the charging portion and an end portion of the surface includes a non-transfer area in contact with the charging portion and in no contact with the transfer portion. The voltage having the normal polarity is applied to the transfer portion when no recording material exists at the transfer portion, and the exposure unit exposes an area, including the non-transfer area of the surface passed through the transfer portion during application of the voltage, by a second exposure amount smaller than the first exposure amount.

Abstract: An image forming apparatus includes a photosensitive drum, a charging member, an exposure unit, a developing member, and a transfer member. In a rotational axis direction of the charging member, a width of a transfer portion of the transfer member is shorter than that of a charging portion of the charging member, and an end of the surface of the photosensitive drum in the axis direction includes a non-transfer area in contact with the charging member and in no contact with the transfer member. The exposure unit exposes the non-transfer area during rotation of the photosensitive drum, and forms a surface potential on the surface downstream of an exposing portion and upstream of the transfer portion in a rotational direction. A controller controls such that an absolute value of the surface potential of the non-transfer area is smaller than that of the transfer outside paper passing area.

Abstract: An image forming apparatus includes a control unit configured to, in executing a job to form images continuously on a plurality of sheets of a recording material, accumulate an addition amount per sheet to an index in accordance with a number of sheets of the recording material to which images are formed in the job. A value of the addition amount per sheet is determined in correspondence with an attribute of the recording material used in the job. The control unit is configured to, during execution of the job, change a throughput of the job so that images are formed at a first throughput if an accumulated value of the index still does not exceed a predetermined threshold value and images are formed at a second throughput slower than the first throughput if the accumulated value of the index has exceeded the threshold value.

Abstract: An image forming apparatus includes an image forming unit configured to form a toner image on a recording material, a fixing unit configured to fix the toner image formed on the recording material by the image forming unit to the recording material, and a controller configured to cause the image forming unit to form an image on a basis of image information, the controller being configured to cause the image forming unit to form the image in which a first toner image and a second toner image is superimposed on each other on the recording material, the first toner image being a toner image corresponding to the image information, the second toner image being constituted by a pattern having anisotropy such that glossiness of the image changes depending on a direction in which the image is viewed.