A medium supply device is provided that includes a single sheet paper accommodating unit at which media are stacked and placed, and a feeding roller configured to feed the media by rotating in contact with a top surface of the placed media. The feeding roller includes a contact portion configured to contact the single sheet paper and a non-contact portion configured to not contact the single sheet paper in a rotational direction, and a plurality of the contact portions and the non-contact portions are provided in a first direction that is an extending direction of a rotation axis of the feeding roller, and the contact portions adjacent to each other in the first direction are out of phase in the rotational direction.

A sheet conveyer having a sheet tray, a tray-driving mechanism, a conveyance guide, a feed roller, a separator, a conveyer, a conveyer-driving mechanism, a controller, and a sheet sensor to detect sheets on the sheet tray, is provided. The conveyer-driving mechanism includes a transmission-active portion and a transmission-passive portion. A conveying velocity to convey the sheets by the conveyer is higher than a conveying velocity to convey the sheets by the feed roller and the separator. The transmission-active portion and the transmission-passive portion are rotatable about a transmission axis. The transmission-passive portion rotates passively by being pushed by the transmission-active portion. After the sheet sensor detects absence of the sheets, and before the transmission-passive portion starts rotating passively, the controller conducts a specific action to move the sheet tray downward by controlling the tray-driving mechanism.

The present invention discloses a card-feeding device and a badge and card printer. The card-feeding device comprises: a base on which cards are stacked, a card outlet being provided at one end of the base; a rotary card-feeding mechanism which is located below the bottommost card and provided with a rotary swing arm and a push rod provided on the rotary swing arm, the push rod pushing the bottommost card towards the card outlet as the swing arm rotates; and a roller card-feeding mechanism which is installed between the rotary card-feeding mechanism and the card outlet and provided with a roller with an outer edge protruding from the top surface of the base, the bottommost card being transported to the card outlet when the roller rotates.

A sheet feeding apparatus includes a sheet feeding roller including a core portion to rotatably support the feeding roller on a feeding roller shaft and a roller portion provided on an outer periphery of the core portion, with the core portion including an engaging mechanism to engage with the feeding roller shaft to restrict movement of the feeding roller in an axial direction of the feeding roller shaft. The core portion also includes a protrusion extending in the axial direction and located on an opposite side of the feeding roller shaft from the engaging mechanism. An end portion of the protrusion is positioned at downstream side of a tip portion of the feeding roller shaft in a removing direction of the feeding roller from the feeding roller shaft.

An apparatus main body of an image reading apparatus is capable of being switched between a first posture and a second posture in which an inclination angle is smaller than that of the first posture. The image reading apparatus is capable of switching between a separation state in which a separation roller separates a document and a non-separation state in which the separation roller does not separate the document. The image reading apparatus puts the separation roller in the separation state when the apparatus main body is in the first posture and puts the separation roller in the non-separation state when the apparatus main body is in the second posture.

An elastic roller is capable of elastic deformation at low load, lightweight and low-cost, and the surface speed of the roller has been made stable. At a drawing showing the view from the side of pipe 2 and flange 3 which make up roller 1, roller 1 which has pipe 2 and flange 3 is supported by shaft 8 which is inserted therein along axis 8a of shaft 8, the situation being such that elastic deformation occurs upon being pressed downward by pressure P from pressure-applying body 11 above pipe. None of the four outermost ribs 7a disposed in outermost gap 6a between outermost ring 4a of flange 3 and middle ring 4b which is mutually adjacent thereto and toward the interior therefrom is present in the upper portion of pipe 2.

Provided is a paper feeding roll that prevents paper transportation failures over a long time. A paper feeding roll 10 is provided with an axial body 12 and an elastic layer 14 formed on an outer periphery of the axial body 12. The circumferential surface of the elastic layer 14 has a plurality of projections 16 forming surface unevenness. Each projection 16 of the plurality of projections 16 is shaped such that a position X of a distal-end part preceding in an opposite direction to a paper feeding direction precedes, in the opposite direction to the paper feeding direction, a position Y of a base-end part preceding in the opposite direction to the paper feeding direction.

A feeding roller structure includes a fastening frame, a transmission component, a transmission roller and a floating coupler. The transmission component is assembled in the fastening frame. The transmission component includes a drive shaft mounted on two sides of the fastening frame. The transmission roller is concentrically arranged around the drive shaft. The floating coupler is mounted to the fastening frame. The floating coupler is coupled between the drive shaft and the transmission roller. Two opposite ends of the floating coupler are adjacent to and spaced from the two sides of the fastening frame to form two gaps. Each gap is formed between one end of the floating coupler and one side of the fastening frame. The two gaps limit an angular displacement of the floating coupler.

A system and method for advancing sticky media through printers includes one or more feed rollers comprised of a grit roller. The grit roller contacts an adhesive side of liner-less label stock removed from a roll or stack for printing. The grit roller works cooperatively with an opposing, counter-rotating roller to remove the label stock from the roll and feed it to a printer.

A paper separating roller, including a shaft body, a first friction member and a second friction member is provided. The first friction member covers a first surface of an outer periphery of the shaft body. The second friction member covers a second surface of the outer periphery of the shaft body, wherein the first friction member and the second friction member are formed of two different materials. With the design of the friction members being formed of composite materials, the paper separating roller has the advantages of two different material features at the same time, such that a wider range of performance capabilities can be achieved.