A transport device unwinds a medium from a roll body to which a shaft member is mounted and transports the medium. The transport device includes an accommodation portion configured to accommodate the roll body, a main body portion to which the accommodation portion is mounted, and a roller pair configured to nip the medium. The accommodation portion and the main body portion are relatively movable. The main body portion includes a rack configured to engage with a gear of the shaft member. The rack is engaged with the gear when the accommodation portion moves relative to the main body portion to be pulled out of the main body portion.

A medium cutting device according to an embodiment may include: a fixed blade provided on one side with respect to a conveyance path in which a medium is conveyed in a thickness direction of the medium orthogonal to a surface of the medium and including a cutting edge thereof; a rotary blade provided on the other side with respect to the conveyance path in the thickness direction, and including a cutting edge thereof, wherein the rotary blade is configured to be rotated in a rotation direction so that the cutting edge of the rotary blade passes by the cutting edge of the fixed blade to cut at a cutting position the medium being conveyed; and a guide member provided upstream of the cutting position in a conveyance direction of the medium and configured to bias the medium toward the rotary blade side.

A medium cutting device according to an embodiment may include: a fixed blade provided on one side with respect to a conveyance path in which a medium is conveyed in a thickness direction of the medium orthogonal to a surface of the medium and including a cutting edge thereof; a rotary blade provided on the other side with respect to the conveyance path in the thickness direction, and including a cutting edge thereof, wherein the rotary blade is configured to be rotated in a rotation direction so that the cutting edge of the rotary blade passes by the cutting edge of the fixed blade to cut at a cutting position the medium being conveyed; and a guide member provided upstream of the cutting position in a conveyance direction of the medium and configured to bias the medium toward the rotary blade side.

A media roll holder assembly a web-based printing system comprises a support for rotatably supporting the roll in an operative position, a holding element for rotatably holding the roll on the support, and a pivotable arm on which the holding element is provided. The pivotable arm is formed and positioned to position the holding element on the roll, such that a lifting force for lifting the roll from the support results in a holding force on the holding element in the first angular direction for holding the roll in the operative position on the support. The roll is then rotatably secured in its operative without excess angular forces acting on the roll. As the rotation of the roll is substantially unimpeded, the medium may be transported with great precision, resulting in high quality printing.

A tape feeder including: an angle sensor configured to detect a final angle of the sprocket at a point in time at which interruption of power supply to the tape feeder is detected, and a current angle of the sprocket at a point in time at which resumption of power supply to the tape feeder is detected; and a control device configured to, when resumption of power supply to the tape feeder is detected, set a target angle of the sprocket based on the final angle, and perform control to rotate the sprocket from the current angle to the target angle so as to convey the carrier tape to a predetermined position.

A printer includes a medium supplier including a shaft support, to which a supply shaft of a roll medium is detachably attached, a medium temporary placement support located below the shaft support of the medium supplier and that receives and supports the roll medium prior to being attached to the medium supplier, and a conveyor that conveys a medium in a conveyance direction that is perpendicular or substantially perpendicular to an axial direction of the supply shaft, the medium being unwound from the supply shaft. The medium temporary placement support includes a support bar that extends in the axial direction, and a placement seat supported by the support bar. The placement seat includes a placement surface on which the roll medium is placed and that extends in the conveyance direction, and a curved portion that includes a convex curve in an upstream end portion of the placement surface in the conveyance direction.

A printer includes a medium supplier including a shaft support, to which a supply shaft of a roll medium is detachably attached, a medium temporary placement support located below the shaft support of the medium supplier and that receives and supports the roll medium prior to being attached to the medium supplier, and a conveyor that conveys a medium in a conveyance direction that is perpendicular or substantially perpendicular to an axial direction of the supply shaft, the medium being unwound from the supply shaft. The medium temporary placement support includes a support bar that extends in the axial direction, and a placement seat supported by the support bar. The placement seat includes a placement surface on which the roll medium is placed and that extends in the conveyance direction, and a curved portion that includes a convex curve in an upstream end portion of the placement surface in the conveyance direction.

A method of tracking rotations of a drum includes activating a three axis accelerometer located on a side of the drum, measuring linear accelerations along three orthogonal axes using the accelerometer, determining whether a predetermined angle of the drum has been rotated based on the measured linear accelerations from the accelerometer, activating a gyroscope when it is determined that the predetermined angle of the drum has been rotated, measuring angular speed at the gyroscope, calculating a number of rotations of the drum from the measured angular speed, and deactivating the gyroscope when it is determined that the measured angular speed is lower than a noise floor level.

A paper roll dispenser can be installed with a paper roll, which is parallel to a long press plate, which has an upper side connected with a hold-down strip. When the paper of the paper roll contact with the hold-down strip, the paper exceeds the paper roll can produce cutting effect. A guide roller is provided beneath the paper roll and if change the direction of the paper roll, the paper of the paper roll can be connected to a crumpled paper device by means of the guide roller, able to produce an effect of constriction of the paper, thus tallying with demand of ergonomics.

An unpowered, manually operable apparatus for dispensing cushioning wrap material drawn concurrently from a roll of separator material and a self-contained cartridge that includes a roll of expandable sheet material. The rolls are supported on a stand for rotation about respective parallel, spaced-apart axes. In addition to the roll, the cartridge includes a tensioning assembly and support panels that abut respective ends of the roll. The tensioning assembly and the support panels cooperate with the stand to control rotational resistance of the roll. The rotational resistance causes the expandable sheet material to expand in length and thickness as it is manually pulled from the stand with the separator material, and support surfaces on the stand hold the cartridge and the separator roll in position. When the cartridge containing the expandable sheet material is depleted, the cartridge is readily removed and replaced.