A conveyance device includes a locking mechanism for an access cover. The locking mechanism includes a cooperating lever and a locking shaft attached to the cooperating lever. The locking shaft is slidable in an axial direction thereof between a locking position where the locking shaft engages in a locking groove of the access cover and a second unlocking position located lateral o the locking groove. When in the second unlocking position, the locking shaft engages with an engaged portion provided at part of a housing or at a fixed frame attached to the housing to constrain the cooperating lever against downward movement of a distal end of the cooperating lever. The locking mechanism further includes an operating member coupled to the locking shaft and including a holding portion capable of being held from outside the housing.

An endless belt includes a base material layer, the base material layer containing a polymer material and conductive particles, wherein in a section of the base material layer in a thickness direction, the conductive particles have an area ratio of 9.0% or more and 14.5% or less, an average value of areas of Delaunay triangles taking centers of gravity of the conductive particles as vertices is 0.10 μm.sup.2 or more and 0.90 μm.sup.2 or less, and a standard deviation of the areas is 0.010 μm.sup.2 or more and 0.080 μm.sup.2 or less.

A transport device includes a transport belt, an abutting unit, a moving mechanism, and a displacement detection unit. The transport belt has an adhesive layer capable of adhering to a medium, and is capable of transporting the medium adhering to the adhesive layer. The abutting unit is capable of abutting against a surface of the adhesive layer. It is assumed that a direction in which the abutting unit is away from the adhesive layer is a first direction and a direction opposite thereto is a second direction. The moving mechanism is capable of moving a position of the abutting unit with respect to the surface in the first direction and the second direction. The displacement detection unit detects a displacement amount of the transport belt in the first direction when the moving mechanism moves the abutting unit in the first direction while the abutting unit abuts against the surface.

A belt drive device includes a drive unit, a detection unit, a blade, and a control unit. The drive unit rotates an endless belt. The detection unit detects a position of a connection portion in which both ends of a reinforcing tape, which is provided on an outer surface of an edge of the belt in a width direction orthogonal to a rotation direction of the belt, in a longitudinal direction along the edge of the belt are overlapped and connected. The blade comes into contact with an outer surface of the belt and an outer surface of the reinforcing tape and is provided to extend in the width direction. The control unit controls driving of the drive unit based on a detection result obtained by the detection unit such that when the drive unit rotates the belt by a constant length in a reverse direction from one end of the reinforcing tape overlapped inside toward the other end of the reinforcing tape overlapped outside at the connection portion from a state in which the belt is stopped, the drive unit rotates the belt in a forward direction to a rotation position where the other end of the reinforcing tape does not come into contact with the blade by a reverse rotation and stops the belt before the belt is reversely rotated.

A transporting belt constituting a transport device transports a medium supported by a front surface in a transport direction. A removal unit includes a blade that comes into contact with the front surface to remove an adhering substance. A plurality of detectors detect a force received by the blade from the transporting belt or a change in the force. A display unit displays information. An adjustment unit is configured to adjust a position of the blade relative to the transporting belt. Each of the detectors are provided corresponding to a respective one of a plurality of regions into which the transporting belt is divided in the width direction intersecting the transport direction. When the control unit determines that there is an abnormal region among the regions based on detection results of the detectors, the control unit causes the display unit to display information indicating the abnormal region.

A belt device includes a belt wound around support rotators, to travel as the support rotators rotate; a belt contact member on a rotation shaft of one of the support rotators, to contact an end of the belt and move in an axial direction of the rotation shaft with the belt; a displacement member on the rotation shaft and including an inclined face to move the one support rotator, to move in the axial direction as the belt contact member moves; a guide to contact the inclined face and restrict a moving direction of the displacement member; a shaft support rotatably supporting the one support rotator and the rotation shaft; a restriction member to restrict movement of the one support rotator and the rotation shaft; and an elastically deformable intermediate member between the shaft support and the restriction member, to prevent the shaft support from contacting the restriction member.

A drive unit includes a drive source and a driving force transmitter that includes a plurality of rotators, an endless belt stretched by the plurality of rotators, a pressing member to press the endless belt, a first support shaft, a first link member to hold the pressing member, a second support shaft, a second link member to press the first link member, a biasing member to bias the second link member. A relation of L1 to L2 satisfies L1>L2, where L1 denotes a distance between the second support shaft and a biasing position and L2 denotes a distance between the second support shaft and a first pressing position. A relation of L3 to L4 satisfies L3>L4, where L3 denotes a distance between the first support shaft and the pressing position and L4 denotes a distance between the first support shaft and a second pressing position.

A conveying device includes a sensor to read a sheet to be conveyed, a first conveyor arranged on an upstream side from the sensor in a sheet conveying direction of the sheet, a second conveyor arranged on a downstream side from the sensor in the sheet conveying direction, and correcting circuitry to correct a distance of the sheet having an error detected when the sensor reads the sheet conveyed by the first conveyor and the second conveyor, to an actual distance. The correcting circuitry uses at least a first correction value correcting a distance read by the sensor when the first conveyor conveys the sheet and a second correction value correcting a distance read by the sensor when the second conveyor conveys the sheet.

A conveying device includes a sensor to read a sheet to be conveyed, a first conveyor arranged on an upstream side from the sensor in a sheet conveying direction of the sheet, a second conveyor arranged on a downstream side from the sensor in the sheet conveying direction, and correcting circuitry to correct a distance of the sheet having an error detected when the sensor reads the sheet conveyed by the first conveyor and the second conveyor, to an actual distance. The correcting circuitry uses at least a first correction value correcting a distance read by the sensor when the first conveyor conveys the sheet and a second correction value correcting a distance read by the sensor when the second conveyor conveys the sheet.

In one example, a conveyance module to advance a belt toward a print station comprises a support structure to support a belt and to permit advance of the belt in a belt-advance direction toward a print station and a pair of guides. In this example, each guide is attached to the support structure and is to engage a portion of a belt. A first guide in the pair is attached to the support structure by a substantially rigid fastener to hold the first guide in a substantially fixed position relative to the support structure. A second guide in the pair is attached to the support structure by a resiliently deformable element to hold the second guide in a movable position relative to the support structure.