摘要:
A ribbon feed mechanism for a printer which develops a drive force for a printing ribbon utilizing the reciprocating movement of a carriage. Torque is applied to two drive gears through a single wire under tension in response to the movement of the carriage. A ribbon drive gear for feeding the ribbon in a predetermined direction is alternately meshed with the two drive gears during reciprocation of the carriage to be thereby rotated in a predetermined single direction. When the ribbon feed is needless, the tension is removed from the wire.
摘要:
A document setting tray of the ADF is disposed above a platen glass of an image forming apparatus. A duplex document ejecting tray is disposed above a document setting tray. A switch back table, on which the duplex document is switched back after one side thereof has been read by the reading device and fed again toward the image reading device, is disposed between the document setting tray and the duplex document ejecting tray. A switch back return path is disposed between the reading position of the image reading position and the switch back table.
摘要:
An electrostatic photographic apparatus includes a photosensitive drum and a fixing device composed of a pair of rollers pressure-contacted with each other over a predetermined nip width, in which a toner image formed on the photosensitive drum is transferred onto a lower surface of a transfer paper transported over an upper portion of the photosensitive drum while contacting therewith and is fixed by a nip portion of the rollers of the fixing device, an inlet end of the nip portion is disposed on a curve of a cross section of the transfer paper when the latter is warped with a radius of curvature smaller than a radius of curvature of cross section of a transfer paper having stiffness smallest among other transfer papers usable in the apparatus when the transfer paper of the smallest stiffness is supported at its rear end horizontally at a point at which the transfer paper leaves the photosensitve drum while allowing the other portion thereof to be drooped freely by gravity, a tangential line of the rollers at a center of the nip portion being substantially coincident with a tangential line of the curve, and guide member having a lower guide surface convexed upwardly is arranged along the curve between the separating point of the transfer paper from the photosensitive drum and the inlet end of the nip portion.
摘要:
A recording head of a current application type serial printer is provided with two independent recording electrode groups on both sides of its tip. The angle of contact of the recording head with a platen of the printer is switched between a forward printing stroke and a backward printing stroke of a carrier so that, usually, the electrode group on the right-hand side of the recording head is used during the forward printing stroke, and the electrode group on the left-hand side during the backward printing stroke.
摘要:
A type wheel cassette to be loaded in a carriage of a printer, typewriter or like printing apparatus and holding a type wheel in a case thereof, and a type wheel cassette loading mechanism for removably loading the cassette in the carriage. The type wheel and the cassette can be assembled with ease, while the cassette can be readily loaded and unloaded into and out of the carriage.
摘要:
A laser beam printer having a scanner unit and a sheet transport apparatus for use with the scanner unit. The printer includes a sheet feeding part, a photosensitive medium, a transfer part and a scanner unit, the transfer part being provided at an upper portion of the photosensitive medium. The sheet transport apparatus includes an upper transport path for transporting a record sheet from the sheet feeding part to the transfer part of the printer. The sheet transport apparatus further includes a transport path which passes by a position where the scanner unit is provided, the position being adjacent to the upper transport path.
摘要:
A laser beam printer having a scanner unit and a sheet transport apparatus for use with the scanner unit. The printer includes a sheet feeding part, a photosensitive medium, a transfer part, an upper cover and a scanner unit, the transfer part being provided at an upper portion of the photosensitive medium. The sheet transport apparatus includes an upper transport path for transporting a record sheet from the sheet feeding part to the transfer part of the printer. The sheet transport apparatus further includes a transport path where the scanner unit is provided, the transport path being provided within the upper cover.
摘要:
A type carrier for use in an impact-type printing machine to form an imprint of virtually the equal quality when used with either a flat hammer or a detentable, shaped hammer is provided. The present type carrier includes a hub and a plurality of fingers extending from the hub, each finger having a printing section which has a front surface provided with at least one type and a back surface having a novel structure. The back surface of the printing section includes at least one flat portion and at least a pair of sloped portions. Preferably, the sloped portions are defined such that they slope down oppositely from a plane common to or below the flat portion in the direction substantially perpendicular to the lengthwise direction of the finger.
摘要:
An improved type element mounting for a high speed type element positioning mechanism of the type which has a type head member having therein a plurality of type elements and a type head shaft on which the type head is mounted. The type head member has a spherical surface on which the type elements are mounted with the faces thereof on the sperical surface and movable in the type head member for being projected beyond the spherical surface. The type elements lie along latitudinal circles on the surface the centers of which lie on the axis of the type head shaft, and the type elements in adjacent latitudinal circles are substantially aligned along longitudinal circles extending from the point of intersection of the type head shaft axis and the spherical surface. The type head shaft is pivotally mounted for pivotal movement around a point corresponding to the center of the sphere of which the spherical surface forms a part. A type hammer is positioned adjacent the type head for striking a type element for projecting it beyond the spherical surface for carrying out a printing action. Each type element has a cylindrical shape with projection extending along the length thereof so as to correspond to shaped holes through which the type elements extend and guide the type elements in their movement to project from the type head member.
摘要:
An amorphous solid composition for a vanadium redox flow battery electrolyte, which can be suitably used for storage of excess electric power for using in daytime, generated in nighttime by a power station, storage of electric power generated by photovoltaic power generation or wind power generation, and the like. The amorphous solid composition for vanadium flow battery electrolyte is characterized in that the weight ratio of the vanadium content in the tetravalent vanadium ions to the vanadium content in the trivalent vanadium ions is 4.5:5.5 to 5.5:4.5, and that the composition exists within the region circumscribed by a straight line A-B, a straight line B-E, a straight line E-F and a straight line F-A, wherein these lines are formed by joining point A (1.25, 23.2), point B (1.25, 20.4), point E (1.60, 18.4) and point F (1.60, 21.2), respectively, in an x-y coordinate system in which the total vanadium content (% by weight) of the tetravalent vanadium ions and the trivalent vanadium ions in the composition is defined as a y-coordinate, a value obtained by dividing the total amount of the tetravalent vanadium ions and the trivalent vanadium ions by 50.94 is defined as a value, a value obtained by dividing the content of sulfate ions in the composition by 96.1 is defined as b value, and a value obtained by dividing b value by a value is defined as an x-coordinate.