Abstract:
An image forming system including multiple photoconductors arranged in a line extending in a vertical direction and forming one body as one unit, and multiple development devices and multiple exposure devices arranged on one side of the line of the multiple photoconductors. An image is transferred to a recording medium on an other side of the line of the multiple photoconductors.
Abstract:
An image forming system having multiple photoconductors arranged in a line and forming one body as one unit, multiple development devices and multiple exposure devices arranged on one side of the line of the multiple photoconductors, an intermediate transfer device arranged on the other side of the line of the multiple photoconductors and a form cassette arranged below the line of the multiple photoconductors. The image forming system further includes a transfer device and a fusing device arranged at an opposite side of the intermediate transfer device with respect to the line of the multiple photoconductors.
Abstract:
An electrophotographic imaging apparatus includes a toner image holding body, a transcription unit for transcribing the toner image on the toner image holding body onto a recording medium, and a conveyor for conveying a recording medium toward the toner image holding body and transcription unit. A judging device will judge whether printing is of a first page or not and if it is decided that printing is to be performed on a first page, a first measuring device will measure the electrical characteristic of the toner image holding body prior to the feeding of a recording medium and a transcription voltage will be set depending of this measured result. Thereafter, the recording medium will be conveyed toward the transcription unit where the electrical characteristics of the non-printing region on the recording medium will be measured via a second measuring device and the transcription voltage will be further adjusted. If it is judged that the recording sheet is not the first sheet, only the second measuring and adjusting will be performed. In this manner, transcribing of a toner image can always be performed regardless of the kind of paper being used and/or changes in the environment (temperature, humidity) and a high transcribing efficiency can be attained.
Abstract:
An image forming apparatus includes a charging member in contact with a photosensitive member for applying a charging voltage at least containing an a.c. component, a laser beam irradiator having a polygon mirror to form an electrostatic latent image and a developing unit for developing the latent image into a visible image and collecting residual developer remaining on the surface of the photosensitive member after the visual image is transferred to a transfer material. The number of revolutions Fp(rps) of the irradiator polygon mirror, the frequency Fb(Hz) of the a.c. component to be applied to the contact charging unit and the system velocity Vp(cm/sec) have a correlation so determined as to meet the requirement of:.vertline.Fp-2.times.Fb.vertline. Fp/2.
Abstract:
An image forming apparatus having a rotatable photosensitive member a charging device for charging a surface of the photosensitive member prior to forming an electrophotographic latent image and a power source for applying a charge voltage which includes at least AC component to the charging device. The charging device includes a rotatable brush member which is formed by implanting piles formed by brush fibers on a base member and provided in contact with the photosensitive member. The photosensitive member and charging device and power source are provided to satisfy the following condition:V.sub.D =K.vertline.f.sub.AC -f.sub.p .vertline.(0
Abstract translation:一种图像形成装置,具有可旋转的感光部件,用于在形成电子照相潜像之前对感光部件的表面充电的充电装置和用于向充电装置施加至少包括AC分量的充电电压的电源。 充电装置包括可旋转的刷构件,其通过将由刷纤维形成的桩植入基底构件并且与感光构件接触而形成。 提供感光元件和充电装置和电源以满足以下条件:VD = K | fAC-fp |(0
Abstract:
The thermoplastic resin composition of the present invention contains(a) either a graft resin composition (J) obtained by graft polymerizing an unsaturated carboxylic acid or a derivative thereof onto a mixture of a polypropylene (C) and a rubbery substance (H), or a graft resin composition (K) obtained by graft polymerizing an unsaturated carboxylic acid or a derivative thereof and an unsaturated aromatic monomer onto a mixture of a polypropylene (C) and a rubbery substance (H),(b) a saturated polyester resin (F),(c) an epoxy group-containing copolymer (G), and(d) a polypropylene (C);which thermoplastic resin composition is suitably used in the fields where high level of heat resistance, impact resistance, and especially low-temperature impact resistance are required.
Abstract:
A thermoplastic resin composition which comprises 100 parts by weight of a composition comprising 95-5% by weight of at least one polyolefin-resin (A) selected from homopolymers of ethylene or .alpha.-olefin or copolymers thereof and these homopolymers or copolymers modified with a polyfunctional compound (E) and/or an unsaturated monomer (L) and 5-95% by weight of at least one polyphenylene-ether-resin (B) selected from polyphenylene ether, modified polyphenylene ether with the above (E) and/or (L) and a composition comprising the polyphenylene or modified polyphenylene ether and an aromatic vinyl polymer resin (M) and 0.001-10 parts by weight of a dinitrodiamine (D) of the following formula (I). ##STR1## (wherein X represents a divalent chain aliphatic group, a cyclic aliphatic group or an aromatic group which may contain a halogen or an oxygen atom, R.sup.1 represents a hydrogen atom, a chain aliphatic group, a cyclic aliphatic group or an aromatic group and when both of X and R.sup.1 are chain aliphatic groups, the nitrogen atoms may further bond each other to form a ring through X and R.sup.1 ; R.sup.2 and R.sup.3 are independently a hydrogen atom or an alkyl group of 1-12 carbon atoms and R.sup.2 and R.sup.3 may bond to form a ring).
Abstract:
A thermoplastic elastomer composition superior in moldability and appearance, little in anisotropy of mechanical properties, especially, tensile strength and retaining low temperature impact strength, is obtained by previously melt-kneading an intermediate composition comprising (a) 100 parts by weight of a selectively hydrogenated block copolymer which has at least two mono-alkenyl or mono-alkenylidene aromatic hydrocarbon polymer blocks A having a number-average molecular weight of 25,000-35,000 and at least one partially or completely hydrogenated aliphatic conjugated diene hydrocarbon polymer block B having a number-average molecular weight of 100,000-150,000, (b) 50-150 parts by weight of an extender oil and (c) 0-50 parts by weight of polypropylene I, then adding, to the kneaded intermediate composition, (d) polypropylene II containing at least 35% by weight of a propylene-ethylene block copolymer having a melt flow rate of 10-30 g/10 min. and an ethylene content of 3-15% by weight in such amount that total amount of polypropylene I plus polypropylene II is 200-400 parts by weight per 100 parts by weight of block copolymer (a) and then further melt kneading the mixture. Further addition of a filler to the composition can afford a thermoplastic elastomer composition of small linear expansion coefficient with retaining the above properties.
Abstract:
Disclosed is a polypropylene resin composition which is superior in mechanical strength and affords molded articles having good appearance which comprises (A) a crystalline polypropylene, (B) a polypropylene modified with an unsaturated carboxylic acid or an acid anhydride thereof, and (C) a zinc oxide whiskers. When the composition additionally contains an inorganic filler such as glass fibers, molded articles further improved in appearance can be obtained. The zinc oxide whiskers preferably have a tetrapod type crystal structure.
Abstract:
A developing device adjoins a rotatably arranged a photoreceptor, and is internally provided with a rotatably disposed developing roller confronting the photoreceptor, a cylindrically formed flexible film member having a peripheral length longer than that of the developing roller and loosely mounted thereover, a first member for forming a slack of the film member, for example, a regulating blade or a cleaning blade, a second member for controlling the position of the slack of the film member, for example, a magnet.