Seiko Epson Corporation

Norio Nagata

Kunio Omura

Toshiyuki Sasaki

Kenichi Hirabayashi

Takashi Aoki

Hironori Maekawa

Hideki Furihata

Masashi Fujikawa

Taku Hirashima

Seiji Kimura

Kazuya Oshida

Hiroyuki Endo

Masashi Nakatsu

Kohei Osawa

Daisuke Yanagimachi

Yusuke Kanno

A cleaning roller to be brought into contact with a medium includes a rotary shaft having a first end portion and a second end portion, and a sticky roller attached to the rotary shaft. A cleaning roller holder includes a first bearing portion configured to restrict a movement range of the first end portion and a second bearing portion configured to restrict a movement range of the second end portion. In a state where the first end portion is disposed at the first bearing portion and the second end portion is disposed at the second bearing portion, the cleaning roller holder positions the cleaning roller in a detachable manner. The center of gravity of the cleaning roller is shifted from the center of the cleaning roller in the longitudinal direction toward the first end portion, and is in a range where the sticky roller exists in the longitudinal direction.

Foreign material removing device and printing apparatus

A sheet guide device has a crumpling prevention unit disposed to a movable part with a guide surface that guides a side edge of die-cut label paper conveyed over the top of a feed plate, and prevents crumpling the side portion of the die-cut label paper of which the side edge contacts the guide surface. The crumpling prevention unit includes a pressure-bearing base unit disposed protruding from the top of the feed plate and causing the side portion of the passing die-cut label paper to rise to the side; a sheet presser part that presses the die-cut label paper to the conveyance path surface at the same or adjacent position to the pressure-bearing base unit; and a side presser member that the side edge of the die-cut label paper inclined by the pressure-bearing base unit contacts.

Sheet guide device and printer

The carriage of a line printer has a head unit that supports a printhead, and a carriage frame that supports the head unit movably up and down. When moving the carriage from a standby position to an opposing position, the carriage is moved while the head unit is held at a up position where the gap to the platen unit is a first distance. The head unit is then lowered at the standby position from the up position to a down position where the platen gap is a second distance that is shorter than the first distance.

Line printer and printhead moving method of a line printer

A printing apparatus and a roll paper transportation device which reduces the space needed to accommodate a roll paper buffer mechanism unit and paper detection unit, and to reduce poor electrical contact in the contact part of the paper detection unit. The roll paper transportation device has a paper detection unit for detecting the presence of roll paper. The paper detection unit itself comprises a detection lever that pivots rotationally when in contact with the roll paper, a cam formed integrally with the detection lever and having a curved surface that is concentric to the rotary axis of the detection lever, and a switch lever that contacts the curved surface of the cam.

Roll paper transportation device and printing apparatus

A printer has a platen gap adjustment mechanism that can hold the platen gaps of two print heads substantially constant. A check processing device has a front print head unit on which are disposed a front print head, a first media transportation roller, and a back platen; a platen lever unit on which a second media transportation roller and front platen are disposed, and which can move toward and away from the first media transportation roller; a lever tension spring that urges the platen lever unit toward the first media transportation roller, and presses the second media transportation roller to the first media transportation roller; a back print head unit on which a back print head is disposed, and which can move toward and away from the first media transportation roller; and an unit tension spring that presses the back print head unit to the platen lever unit.

Printer with moveable first and second print head units

A recording paper transportation path structure suppresses sagging of the recording paper fed from the nipping part of a pair of rollers to the platen surface of a vacuum platen, and can prevent a drop in paper feed precision. In a roll paper printer, the recording paper fed through the nipping partof a paper feed rollerand a paper pressure rolleris fed along the contact plane Pof the outside surface of the rollersandtoward the platen surfaceof the vacuum platenat a slightly lower position. An inclined surface partthat slopes along the contact plane P, an up-lifting surface partthat slopes down, and a protruding surface partare formed contiguously to the upstream side at the upstream end partof the platen surface. Because the part of the recording mediumfed from the nipping partis supported and guided by these parts, the paper is guided to the horizontal surfaceof the platen surfacewithout drooping down, and a drop in paper feed precision and paper jams caused by the recording paper sagging can be avoided.

Recording paper transportation path structure and printer

A data reading apparatus for reading and/or scanning data from a first and second scanned medium comprising a first transportation path P, along which the first scanned medium is conveyed and a second transportation path P, along which the second scanned medium is conveyed and wherein the first and second transportation paths each have a common mutually shared middle transportation path through which both scanned media must pass and a common data reader reading data from each scanned medium respectively. Checks S are conveyed on the first transportation path P, cards C are conveyed on the second transportation path Pat a different transportation height from that of the first transportation path Pwith data read from the respective media as they are being conveyed. Because the transportation heights differ, scanned media can be transported on different transportation paths without involving special switching devices.

Data reading apparatus

A printing apparatus and a roll paper transportation device which reduces the space needed to accommodate a roll paper buffer mechanism unit and paper detection unit, and to reduce poor electrical contact in the contact part of the paper detection unit. The roll paper transportation device has a paper detection unitfor detecting the presence of roll paper, and a buffer mechanism unitfor absorbing variation in roll paper tension in order to keep the roll papertension less than or equal to a predetermined level. The buffer mechanism unitforms a housing unitfor housing at least part of the paper detection unitin a common area disposed in the buffer mechanism unitenabling the paper detection unitand buffer unitto operate in unison without interfering with the operation of the other.

A stamping device comprising a stamp, a drive mechanism for moving the stamp between a printing position and a standby position, and a return urging member that urges the stamp towards the standby position in order to return the stamp to the standby position if the drive mechanism becomes inoperable.

Stamping device and a media processing device

A printer having a cover opening and closing mechanism for opening and closing a cover to the roll paper compartment of the printer including a four-node parallel linkage mechanism and an urging member to prevent the four-node parallel linkage mechanism from locking into a fixed position when the cover is opened or closed. The four-node parallel linkage mechanism comprises right and left side panel portions of a rocker panel to which the cover is attached, right and left rocker arms located behind the rocker panel, and a parallel motion panel disposed horizontally connecting the top ends of the rocker panel and the rocker arms. A coil spring pulls up on the rocker arms when the cover opening and closing mechanism is swung down to the horizontal full open position, and a flexible strip between the rocker arms and parallel motion panel pushes up on the parallel motion panel. The parallel motion panel and the rocker arms are thus prevented from bending downward at the node where they join, and the parallel linkage mechanism is therefore prevented from locking.

Roll paper printer

A media transportation mechanism comprising a first transportation roller pair and second transportation roller pair disposed in the transportation path on the upstream and downstream sides, respectively, of image scanners convey a slip over a sliding guide surface. The first transportation roller pair produces a feed force towards the sliding guide surface so as to push the leading end edge of the slip to the sliding guide surface. The second transportation roller pair produces a feed force in the direction away from the sliding guide surface so as to push the trailing end edge of the slip to the sliding guide surface.

Media transportation mechanism and a data processing apparatus having a media transportation mechanism

Stamp

An image scanning apparatus for scanning a plurality of mediums of different thicknesses with each medium scanned by pressing the medium to the scanning surface of an image scanning sensor with appropriate force using a first pressure mechanism comprising first rollers for pressing the medium to the scanning surface, a coil spring for urging the first rollers toward the scanning surface when the media thickness is less than a specified thickness, and a first tension spring for urging the first rollers to the scanning surface when the media thickness exceeds the specified thickness and a second pressure mechanism comprising second rollers for pressing the medium to the scanning surface, and a second tension spring for urging the second rollers to the scanning surface wherein the force imposed upon the scanning surface by the coil spring is substantially equal to the force imposed by the second tension spring.

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Matsumoto, Japan

Norio Nagata