Kyocera Document Solutions Patente

An image forming apparatus (1) includes a drive motor (151), a transmission switching portion, a conveying processing portion (162), and an abnormality determination processing portion (163). The conveying processing portion (162) drives the drive motor (151) while the image forming portion (13) is not executing an image forming process for forming an image on a sheet (P), and executes a lift raising process for switching the transmission switching portion to a transmission state in which the driving force of the drive motor (151) is transmitted to the lift mechanism (230). The abnormality determination processing portion (163) determines absence or presence of a sheet conveying abnormality on a conveying path (140) along which the sheet (P) is conveyed by the conveying rollers (141) when the lift raising process is executed by the conveying processing portion (162) without executing an image forming process in which an image is formed on the sheet (P) by the image forming portion (13).

A processing unit performs a postprocess for a sheet bunch on a processing tray. In a waiting transportation path, a subsequent sheet can wait while the postprocess is performed for the sheet bunch. If sheet transportation is suspended, a controller determines whether concurrent transportation is performed or not on the basis of whether there is the sheet bunch on the processing tray and whether there is the subsequent sheet in the waiting transportation path. In the concurrent transportation, when the sheet bunch is outputted through an ejection port, the controller transports the subsequent sheet to an output roller and causes the subsequent sheet to protrude from the ejection port such that the subsequent sheet partially overlaps the sheet bunch, and after a rear end of the sheet bunch passes through the ejection port, the controller reverses the output roller and transports the subsequent sheet to the processing tray.

A pretreatment liquid is used for pretreating an impermeable medium on which an image is recorded with a water-based ink. A polarity component of surface free energy of the impermeable medium is 10 mJ/m² or less. The pretreatment liquid contains 10 mass% or more of 2-ethylhexyl acrylate.

An output roller (23) outputs a sheet bunch on a processing tray (23) after a postprocess through an ejection port (24a). In a waiting transportation path (10b), a subsequent sheet (211) can wait while the postprocess is performed for the sheet bunch (111). The transportation roller (12) draws a subsequent sheet to the waiting transportation path and transports the subsequent sheet from the waiting transportation path to the processing tray. A controller (41) performs concurrent transportation, and in the concurrent transportation, (a) when the sheet bunch is outputted through the ejection port, transports the subsequent sheet to the output roller and causes the subsequent sheet to protrude from the ejection port such that the subsequent sheet partially overlaps the sheet bunch, and (b) after a rear end of the sheet bunch passes through the ejection port, reverses the output roller and transports the subsequent sheet to the processing tray.

An image forming apparatus (1) includes a photoconductor drum (4), an intermediate transfer belt (5) that moves in contact with the photoconductor drum (4), and a primary transfer roller (31) which is a metal roller. A first contact region (4S), being a region on the photoconductor drum (4) in contact with the intermediate transfer belt (5), and a second contact region (1S), being a region on the primary transfer roller (31) in contact with the intermediate transfer belt (5), are spaced from each other, and a summit of the primary transfer roller (31), protruding farthest toward the photoconductor drum (4), in a direction in which the photoconductor drum (4) and the primary transfer roller (31) are aligned across the intermediate transfer belt (5), is set to intrude on the photoconductor drum (4), via the intermediate transfer belt (5).

An image forming apparatus (1) includes a photoconductor drum (4), an intermediate transfer belt (5) that moves in contact with the photoconductor drum (4), and a primary transfer roller (31) that transfers a toner image on the photoconductor drum (4), therefrom to the intermediate transfer belt (5). A part of a first contact region (4S) between the intermediate transfer belt (5) and the photoconductor drum (4), and a part of a second contact region (1S) between the intermediate transfer belt (5) and the primary transfer roller (31), are made to overlap with each other. A summit of the primary transfer roller (31), closest to the photoconductor drum (4) in a direction in which the photoconductor drum (4) and the primary transfer roller (31) are aligned across the intermediate transfer belt (5), is set to intrude on the photoconductor drum (4), via the intermediate transfer belt (5). An intrusion amount (Kr) of the summit of the primary transfer roller (31) on the photoconductor drum (4), relative to an overlapping amount, is set within a predetermined proper range.

An image forming apparatus (100) includes an air intake fan (41), a duct (44), and a guide portion (54). The air intake fan (41) is provided at a side of a housing (1) in a first direction (D5). The duct (44) includes an air blowing port (51) that opens toward an image forming portion (3) at a position spaced apart from the air intake fan (41) in the direction orthogonal to the first direction (D5), an extending portion (52) that extends from the air intake fan (41) to the air blowing port (51) along a side wall portion (1A) of the housing (1) in the first direction (D5), and a connecting portion (53) that connects the extending end (52A) of the extending portion (52) and the air blowing port (51). The guide portion (54) guides part of airflow into the connecting portion (53) to the upstream side of the air blowing port (51) in the extending direction of the extending portion (52).

An image forming apparatus (1) includes a photoconductor drum (4), an intermediate transfer belt (5) that moves in contact with the photoconductor drum (4), and a primary transfer roller (31) that transfers a toner image on the photoconductor drum (4), therefrom to the intermediate transfer belt (5). A part of a first contact region (4S) between the intermediate transfer belt (5) and the photoconductor drum (4), and a part of a second contact region (1S) between the intermediate transfer belt (5) and the primary transfer roller (31), are made to overlap with each other, and an offset amount (F), corresponding to a distance along a moving direction (A) of the intermediate transfer belt (5), between a rotational center of the photoconductor drum (4) and a rotational center of the primary transfer roller (31), relative to the overlapping amount, is set to be in a predetermined proper range.

A heater (H) which is held by a base member (600) includes a plurality of resistors (6) arrayed in a main direction on its surface. A plurality of input electrodes (61) which are electrically connected to the plurality of resistors (6) are formed on an end portion of the heater (H), and are arranged on an end portion of the base member (600) in the main direction. A connector (72) includes a nip portion (723) including a pair of arm portions (722) that nip the base member end portion (600a) and a plurality of output electrodes (73) which are arranged on inner surfaces of the pair of arm portions (722) and come into contact with the plurality of input electrodes (61). A sheet member (6x) is adhered to an end surface of the base member end portion (600a) and a side surface of the nip portion (723) and closes a gap between the end surface of the base member end portion (600a) and the side surface of the nip portion (723).

A SaaS providing system (20) includes a SaaS providing unit that provides SaaS. In a case where an instruction to generate a purchaser tenant that serves as a tenant of a purchaser of the SaaS is provided from outside the SaaS providing system and a device ID that serves as identification information of an electronic apparatus that is used by the purchaser and utilizes the SaaS is notified (S132) from the outside, the SaaS providing unit generates (S133 and S134) the purchaser tenant in association with a vendor associated with the device ID notified from the outside in vendor/device association information that associates the vendor of the SaaS with the device ID.

An image formation control method is provided for an image forming apparatus (10) including a printing device (1) and an image reading device (5). During continuous print processing, a control device (8) executes a test print process and determines whether a read test image is normal. If the image is determined to be abnormal, the continuous print processing is suspended, and the printing device (1) is automatically adjusted based on the abnormality. After adjusting the printing device (1), the method is characterized by re-executing the test print process and the reading process. When it is determined that the re-read image is normal, the control device (8) causes the printing device (1) to re-execute the print process starting from a page immediately following the page corresponding to the most recent normal determination, thereby resuming the continuous print processing.

A cooling device (6) includes a tank (61), a main tray (601), a pump (62), a heat exchanging portion (6b), a radiator (63), and a plurality of tubes (6c). The pump (62) and the radiator (63) are disposed on the main tray (601). The tank (61) includes an upper surface tray (61b), a tube fixing portion (61d), and a liquid discharging portion (61e). The upper surface tray (61b) forms an upper surface of the tank (61). The tube fixing portion (61d) fixes a portion of a pair of specific tubes (6ca) to the upper surface tray (61b) with the pair of specific tubes (6ca) penetrating the upper surface tray (61b). The liquid discharging portion (61e) forms a discharge path of liquid from the upper surface tray (61b) to the main tray (601).

A cooling device (6) includes a tank (61), a pump (62), a heat exchanging portion (6b), a radiator (63), a plurality of tubes (6c), and a tank support (602). The tank (61) includes a cap (61c) that closes a supply port (61bx) having communication with inside of the tank (61). The tank support (602) supports the tank (61) and is supported so as to be pivotable about a shaft portion (603) disposed in a unit region along a perpendicular direction, the unit region including regions in which the pump (62) and the radiator (63) are disposed. The tank support (602) pivots to move the tank (61) between an actuation position and a supply position. The tank (61) is contained within the unit region at the actuation position. The cap (61c) sticks out of the unit region at the supply position.

A liquid supply device (8) includes ejection portions (82) which are respectively arranged in a plurality of division flow paths (84B). The ejection portion (82) includes a nozzle (821), a check valve (822) and a flow path resistant member (823). The check valve (822) is arranged on the upstream side of the nozzle (821) in the direction of ejection of the liquid and distributes the liquid toward the nozzle (821) when the pressure of the liquid in the division flow path (84B) is equal to or greater than a first pressure. The flow path resistant member (823) is arranged between the check valve (822) and the nozzle (821), generates resistance to the distribution of the liquid and distributes the liquid toward the nozzle (821) when the pressure of the liquid that has passed through the check valve (822) is equal to or greater than a second pressure greater than the first pressure.

A controller (111) moves a sheet guide (51) on an intermediate tray (96) from position to position. The controller (111) executes a print job with stapling processing. When the print job with stapling processing is followed by a print job without the stapling processing, the controller (111) keeps from moving the sheet guide (51) and executes the print job without the stapling processing. In doing so, each printed sheet is placed on the intermediate tray (96) and, after completion of printing of all sheets in the print job without the stapling processing, the printed sheets are ejected all together to a sheet output tray (92).

An image forming apparatus (100) includes an ejection portion (30), a container portion (61), a storage portion (65), a heater (73), a detection processing portion (91), and a supply processing portion (92). The ejection portion (30) ejects ink. The container portion (61) contains the ink to be supplied to the ejection portion (30). The storage portion (65) stores the ink between the container portion (61) and the ejection portion (30) in a supply path of the ink from the container portion (61) to the ejection portion (30). The heater (73) heats the ink between the container portion (61) and the storage portion (65) in the supply path; The detection processing portion (91) detects temperature of a location where the image forming apparatus (100) is installed. The supply processing portion (92) supplies the ink from the container portion (61) to the storage portion (65) at a supply speed based on the detected temperature detected by the detection processing portion (91).

In an image forming apparatus, a controller (31) executes transition processing for allowing the image forming apparatus to transition from a first power state to a second power state where less electric power is consumed than in the first power state. When a person is detected by a human detection sensor (25) during the second power state, the controller (31) executes return processing for setting the image forming apparatus to the first power state. When a user is detected by the human detection sensor (25) during execution of the transition processing, the controller (31) suspends the transition processing, maintains the image forming apparatus in a state midway through transition from the first to second power state. When a period of suspension of the transition processing reaches a specific time, the controller (31) restarts the transition processing and sets the image forming apparatus to the second power state.

A positively chargeable toner (101) includes toner particles each including a toner base particle (102) and an external additive (103). The toner base particle (102) contains, at least, a binder resin, a colorant, and a release agent. The external additive (103) includes an inorganic particle (104) and a resin particle (105). The resin particle (105) contains a cationic surfactant, has a volume average particle size of 40 nm or more but 110 nm or less, and has a hardness of 1 µN or higher when measured with a probe displacement of 40 nm. Where ΔSP1 is a difference between an SP value of the release agent and an SP value of the resin particle (105), and ΔSP2 is a difference between an SP value of the binder resin and the SP value of the resin particle (105), 0.8 ≦ ΔSP1 ≦ 1.1 (cal/cm³)^1/2 and 1.3 ≦ ΔSP2 ≦ 1.6 (cal/cm³)^1/2 are satisfied.

A developer carrying member (10) includes a shaft (1), a magnet (2), a sleeve (3), a flange (4), and adhesive (5). The flange (4) has a first fitting portion (41), a second fitting portion (42), and a groove portion (43). The adhesive (5) is disposed in the groove portion (43). A first groove portion (431) and a second groove portion (432) are formed continuously in this order from the first fitting portion (41) side to the second fitting portion (42) side. The height from the bottom surface of the second groove portion (432) to the outer circumferential surface of the first fitting portion (41) is greater than that from the bottom surface of the first groove portion (431) to the outer circumferential surface of the first fitting portion (41).

A developer carrying member (10) includes a shaft (1), a magnet (2), a sleeve (3), a flange (4), and adhesive (5). The height from the bottom surface of a second groove portion (432) to the outer circumferential surface of a first fitting portion (41) is greater than the height from the bottom surface of a first groove portion (431) to the outer circumferential surface of the first fitting portion (41). The height from the bottom surface of a third groove portion (433) to the outer circumferential surface of the first fitting portion (41) is smaller than the height from the bottom surface of the second groove portion (432) to the outer circumferential surface of the first fitting portion (41), and is equal to or greater than the height from the bottom surface of the first groove portion (431) to the outer circumferential surface of the first fitting portion (41).

An inkjet recording apparatus (100) at least includes a conveyance portion (1), an application portion (2), a first drying portion (5), a recording portion (3), and a second drying portion (6). The first drying portion (5) dries white ink applied to a recoding medium (S) by the application portion (2). The recording portion (3) ejects non-white ink onto the recording medium (S) having passed through the first drying portion (5). The second drying portion (6) dries the non-white ink applied to the recoding medium (S) by the recording portion (3). The white ink contains first resin particles with a first minimum film formation temperature of 40°C to 80°C. The non-white ink contains second resin particles with a second minimum film formation temperature of 80°C or less. The drying temperature is, in the first drying portion (5), lower than the first minimum film formation temperature and, in the second drying portion (6), equal to or higher than the first and second minimum film formation temperatures.

A controller (38) of an ink-jet recording apparatus (10) creates, for each of line heads (15Y, 15B, 15C, 15M), a print queue of print jobs each for forming a multicolor image on a sheet (P) and executes the print jobs according to the print queue. When a width of the sheet (P) is smaller than a sheet width for use in the print job not yet being executed, the controller (38) sets, on a basis of each of the line heads (15Y, 15B, 15C, 15M), width information on the sheet (P) in association with the print job not yet being executed at the line head and executes, based on the width information set to the print job not yet being executed at each of the line heads, mask processing for narrowing a color image of the print job not yet being executed in a widthwise direction of the sheet (P).

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A sheet post-processing apparatus (1) includes a post-processing main unit (1M) and an expansion unit (1E). The expansion unit (1E), into which a sheet having passed through the post-processing main unit (1M) is introduced, is removably mounted on the post-processing main unit (1M). The post-processing main unit (1M) includes a switching guide (13a) that switches the conveyance direction of the sheet between a first direction (f1) leading to a main-unit discharge tray (53) and a second direction (f2) leading to the expansion unit (1E). The expansion unit (1E) includes a guide contact member (17f) that, when the expansion unit(1E) is mounted on the post-processing main unit(1M), makes contact with the switching guide (13a) to switch the switching guide (13a) to a position for the second direction (f2).

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