An image forming device with a collapsible paper guide is provided. The image forming device includes a casing, a first tray structure and a paper guide. A medium gateway opening is formed on the casing. The first tray structure is disposed on the casing and adjacent to the medium gateway opening. The paper guide includes a first base disposed on the first tray structure and a first guiding component pivotally connected to the first base. The paper guide is switchable relative to the first tray structure between a used position and a stored position. A first included angle included between the first guiding component and the first base is less than 90 degrees when the paper guide is located at the used position, so that the first guiding component can be interfered and driven to pivotally fold for preventing the paper guide from being broken or damaged.

A medium conveying apparatus includes a housing including an accommodation portion provided with a guide portion at an end portion in a width direction, a tray accommodated in the accommodation portion so as to be pulled out, and including a placing surface for placing an ejected medium, and an engaging portion provided on a side surface of the tray, to engage the guide portion. The guide portion includes a pair of rails inclined upward and having a predetermined width. The engaging portion includes two protrusions provided so as to slide between the pair of rails and located apart from each other by a predetermined distance. By locating the two protrusions between the pair of rails, the tray is positioned at a predetermined position with respect to the housing with a front end portion of a downstream side in the medium ejecting direction located upward.

A sheet feeder including a tray, a feeder roller, a guide, a separator, a motor, a controller, and a sensor, is provided. The sheet feeder separates an object sheet from other sheets in the tray and feed the object sheet through the guide and the separator by rotation of the feeder roller. The controller determines a remaining volume of the sheets in the tray based on a signal from the sensor; generate a velocity profile so that the object sheet is fed at a lower velocity in an earlier first period than a velocity in a later second period; based on the determined remaining volume of the plurality of sheets, modify at least one of a length of the first period and the target velocity in the first period of the velocity profile; and after modification of the velocity profile, control the motor in compliance with the modified velocity profile.

Embodiments provide methods, apparatuses, and systems for compressing media in a media stack. In various embodiments, a paddle moves between various positions. During the move, the paddle is configured to compress the media stack.

A printer includes a sheet stopper that rotates between a regulating position where a sheet placed in the feeding tray is regulated and a passing position where the sheet placed in a feeding tray is passed through, and an inversion path introduction unit that rotates between a forward-feeding position and a reverse-feeding position of introducing the sheet. The inversion path introduction unit is disposed at the forward-feeding position when a sheet is conveyed in a sheet feeding direction. The inversion path introduction unit is disposed at the reverse-feeding position when a sheet is conveyed in a direction opposite to the sheet feeding direction and the inversion path introduction unit introduces the sheet into an inversion path. The sheet stopper changes the regulating position and the passing position in conjunction with rotation of the inversion path introduction unit.

An apparatus for holding label stock includes a body including a base and a roll holding area with a roll holding support extending from the base for receiving a roll of label stock. A plurality of rollers are located along a label stock feed path from the roll holding area to a label stock exit zone of the body. The plurality of rollers include a tensioning roller that is movable relative to the base to dissipate tension loads on label stock during label stock movement.

A medium-discharging device includes: a device main body including a medium-discharging section that discharges a medium; a medium-receiving tray that receives the medium discharged by the medium-discharging section; and a pressing member that is configured to be attached to and detached from to the device main body and presses the medium discharged by the medium-discharging section against the medium-receiving tray in a state in which the pressing member is attached to the device main body, in which the pressing member is configured to switch, in the state in which the pressing member is attached to the device main body, between a first state in which the pressing member comes into contact with the medium-receiving tray and a second state in which the pressing member retreats upward so as to be apart from the medium-receiving tray.

An imaging device having a door-actuated feed roll separator mechanism. A pair of opposed panels of a frame of the imaging device are positioned parallel to a media path. A feed roll pair in the media path has a drive roll fixedly and rotatably mounted between the panels and a backup roll mounted to a pair of release assemblies that are slidably mounted to the panels. Biasing members bias the backup roll into contact with the drive roll forming a feed nip. A door pivotally mounted along a bottom end to the frame substantially covers the media path. A pair of tethers connect the pair of release assemblies to the door. With the door lowered, its weight applies a release force to the backup roll separating it from the drive roll to allow for easier removal of a media sheet jammed in the feed nip

A medium carrying device includes a carrying part that carries a continuous print medium, a detection part that includes a light emitting part and a light receiving part arranged sandwiching a carrying path, and that detects the print medium carried on the carrying path according to a light amount that is received by the light receiving part, and a control part that controls operations of the carrying part and the detection part, wherein the control part sets a first emitted light amount of the emitted light of the light emitting part used in image formation to the print medium by performing a light amount measurement using the light emitting part and the light receiving part in a state where the print medium is carried to a first position, and sets a threshold light amount that is used in detecting a boundary position between the first region and the second region by the detection part through performing another light amount measurement by obtaining a receiving light amount of the light receiving part with the first emitted light amount and by determining the threshold light amount based on the receiving light amount in a state where the print medium is carried from the first position to another second position.

At a printer that feeds a continuous paper unwound from a paper sheet supply unit in a sheet-shape to a printing head portion side via a damper portion, and then prints on a label of the continuous paper, in conjunction with an opening and closing operation of the printing head portion of the printing unit, the damper portion opens and closes in a vertical direction.