摘要:
A highly reliable sheet feed device for a copier, facsimile apparatus, printer or similar image forming apparatus and having a plurality of sheet storing portions which are arranged substantially horizontally and serially in an intended direction of sheet transport. The device surely feeds sheets from the storing portions one by one and eliminate sheet jams and defective sheet feed. Further, the device is simple and miniature and capable of accommodating a plurality of kinds of sheets therein.
摘要:
In an image forming apparatus, a fixing device for fixing a toner image on a paper has an oil applying member for applying oil to a heat roller, and an impurity fixing member for fixing the impurities, including toner and paper dust, to the cleaning member. The impurities transferred from the applying member to the cleaning member are fixed to the cleaning member. As a result, the applying member suffers from a minimum of contamination and can be cleaned when contaminated. This obviates the reverse transfer of the contamination from the applying roller to the heat roller which would lower image quality.
摘要:
The photoreactive adhesive composition of the present invention is cured in a short time and has a low percentage of water absorption and excellent adhesiveness after curing because it contains a monofunctional radically-polymerizable substance, a polyfunctional cationically-polymerizable substance, a noncrystalline polyester resin, a photoradical polymerization initiator, and a photocationic polymerization initiator.
摘要:
The sheet feeding apparatus feeds sheet media between a feed roller and a separating member pressed into contact with the feed roller, and separates and conveys sheet media held between the feed roller and the separating member one by one by utilizing differences in frictional coefficients between the feed roller, the separating member, and the sheet media. The sheet media are separated and conveyed while periodically changing the pressurizing force of the reverse roller against the feed roller.
摘要:
The method of feeding a developer according to the present invention is characterized by controlling the quantity of the developer fed to a developing zone, by the use of a member having on its surface an electret dielectric layer, which is used as an ear cutter. According to the present invention, the quantity of the developer being carried is controlled by the action of an electrostatic force exerted from the electret dielectric layer. Hence it becomes possible to effectively eliminate the density unevenness, charge unevenness of the developer and to obtain a stable image.
摘要:
Disclosed is a heat-sensitive recording element capable of forming an image of a hue close to a pure black at a low density, which comprises a dispersion of a leuco dye, a heat-fusible organic acidic substance solid at normal temperature and a sensitizing agent in a binder, wherein the leuco dye comprises a fluoran type leuco dye for forming a black color and a rhodamine lactam type leuco dye for forming a red dye in an amount of 1.5 to 30% by weight based on said black color-forming leuco dye.
摘要:
The invention is a reactive hot melt adhesive composition comprising a cationically polymerizable compound, on the average per molecule, having one or more cyclic ether groups such as epoxy groups, a phthalate diester compound expressed by the following formula (2) and a cationic photo-initiator: wherein in the formula (2), R5 indicates (ChH2hO)iH and R6 indicates (CkH2kO)lH or (CkH2kO)lCkH2k+1, provided that h, i, k and l each are an integer of 1 or more. The present invention provides a reactive hot melt adhesive, in which a curing reaction progresses under application of actinic radiation.
摘要:
A brushless three-phase synchronous generator includes a stator having primary generating windings and stator excitation windings whose number of poles is odd-number times the number of poles of the primary generating windings. The generator further includes a cylindrical rotor on which a plurality of field windings are wound in a full-pitch concentrated winding form. The plurality of field windings are respectively short-circuited by the corresponding diodes. A plurality of field windings in which voltages of the same phase are induced based on the odd-order spatial higher harmonic magnetic fields are connected in parallel and further connected in parallel to the central field windings which effectively produce primary field magnetic fluxes. A circulating rectifier element is connected in parallel to the central field windings. Improvement in the waveforms of the primary magnetic fields can be achieved and self-excitation in the case where the single-phase loads are connected can be prevented from occurring while magnetic coupling of the rotor field windings to the spatial higher harmonic components of the armature reaction magnetic fields is effectively maintained well.