摘要:
The invention relates to novel uracil derivatives having excellent inhibiting effects on human derived thymidine phosphorylates and anti-tumor activity. The pharmaceutical compositions, anti-tumor potentiators and antitumor agents containing such novel compounds, and a process for their preparation and use are described. The novel uracil derivative compounds are represented by the general formula (1′):
摘要:
A laser printer (10) uses an elongated toner cartridge (24) adapted for insertion into a toner cartridge slot (25) defined within a body housing (12) of the printer (10). The slot (25) is elongated in shape and extends horizontally. The toner cartridge (24) extends along the slot (25) when received in it. The slot (25) has a mouth at one longitudinal end through which the toner cartridge (24) is inserted in and removed from the slot (25). A slot door (26) is provided for the mouth of the slot. The slot door (26) is supported to be movable between a first position for substantially closing the mouth and a second position for leaving the mouth open. The slot door (26) has inner and outer sides, the inner side facing toward inside of the slot (25) when the slot door (26) is located at the first position while facing upward when the slot door (26) is located at the second position. The slot door (26) has guide surfaces formed on its inner side for guiding the toner cartridge to establish alignment of the toner cartridge (24) relative to the slot (25) preparatory to inserting the former into the latter. The slot door (26) includes a toner collector vessel (62) for collecting any toner falling down from a used toner cartridge during its removal from the slot (25). The slot door (26) facilitates toner cartridge replacement, prevents ambient light from entering the slot (25) and avoids contamination of environment of the printer (10) with toner.
摘要:
A toner reservoir for a laser printer includes an elongated toner hopper housing extending in a horizontal direction and an elongated toner cartridge adapted for detachable attachment on the toner hopper housing with its bottom on the top of the latter. The toner hopper housing has an elongated top opening extending longitudinally of the toner hopper housing. The toner cartridge has an elongated bottom opening extending longitudinally of the toner cartridge. The top and bottom openings are adapted to mate with each other when the toner cartridge is attached on the toner hopper housing so as to allow discharge of toner through them from the toner cartridge into the toner hopper housing. The bottom opening is closed by a strip of sealing tape, which is removed away after the toner cartridge is attached on the toner hopper housing. A toner sensor is provided in the toner hopper housing. The toner hopper housing has upright partition walls dividing the space in the toner hopper housing into local regions arranged along the length thereof, such that any toner falling down from the toner cartridge into the toner hopper housing upon removal of the sealing tape is substantially prevented by the partition walls from moving from one of the local regions into another. In this manner, the toner level in the toner reservoir is effectively equalized along its length upon toner replenishment, allowing appropriate toner level detection by a single toner sensor.
摘要:
A sample is taken out of a molten magnesium alloy, the cooling curve of the sample during solidification is measured, the content of the aluminum component in the sample is determined by the use of the crystallization temperature of a phase appearing in the cooling curve, together with cooling curves, and if the results of bath analysis show the components to deviate from the standard values and target values, an aluminum-manganese master alloy, aluminum or magnesium is added to the molten magnesium alloy to adjust the components to an appropriate amount of aluminum or an appropriate iron/manganese ratio, whereby a magnesium alloy is produced.
摘要:
A fixing unit, used for fixing images on a recording sheet, includes a heat roller accommodating a heater, and a press roller movable between a retracted position and an operating position. The heat roller is rotated by a driving mechanism. A moving mechanism opens and closes a gap between the press roller and the heat roller by moving the press roller between the retracted position and the operating position. An assist gear rotates the press roller in a predetermined direction when the opening/closing mechanism moves the press roller toward the operating position.
摘要:
A variable capacity type viscous heater is provided in which the capacity reduction is carried out securely, and which can inhibit a viscous fluid from deteriorating the endurable heat generation even after a long period of service. For instance, it includes a heat-generating chamber, a collector passage, a supply passage, and a control chamber, which are formed therein. The collector passage is communicated with a central region of the heat-generating chamber, and is capable of opening and closing. The supply passage is communicated with a lower region of the heat-generating chamber. The control chamber is communicated with the collector passage and the supply passage. A silicone oil, held in the heat-generating chamber, is collected into the control chamber by the Weissenberg effect by way of the opened collector passage, thereby carrying out the capacity reduction. Whilst, the silicone oil, held in the control chamber, is supplied into the heat-generating chamber by way of the supply passage, thereby carrying out the capacity enlargement.
摘要:
A fixing unit includes a heat roller accommodating a heater and a press roller movable between an operating position in which the recording sheet is nipped by the rollers and a retracted position. A driven gear is provided to one axial end of heat roller, which engages a rotating mechanism for rotating the heat roller. An opening/closing mechanism is arranged to move a first axial end (at the same side as the driven gear of the heat roller) of said press roller to said operating position before moving a second axial end of the press roller to the operating position.
摘要:
There are described a novel squarylium compound represented by the formula (I): ##STR1## and an optical information recording medium using the squarylium compound in the recording layer.
摘要:
An electrophotographic printer is capable of using a plurality of types of continuous form recording media having different page lengths, respectively. In the printer, a photoconductive member is charged and exposed to light carrying image data to form a latent image. In operation, one of the plurality of types of recording media is selected, and a portion of the photoconductive member corresponding to a page of the selected one of the plurality of types of recording media is exposed to light. In another embodiment, a laser beam printer utilizes a continuous-form recording sheet, wherein two control members are provided for, respectively, controlling the recording sheet so as to be discharged from the printing device after a printing operation, and for controlling the recording sheet so as to be located at a position from which a printing operation is restarted. Thus, recording sheets are not wasted when printer output is started.
摘要:
An electrophotographic printer includes a fixing unit having a movable pressure roller, movable toward and away from a heat roller. The heat roller of the fixing unit is above a plane formed between a pair of discharge rollers and a tractor, so that the paper path between the tractor and the discharge rollers is straight when the pressure roller is retracted, and the paper path is bent when the pressure roller is moved to contact the heat roller. The paper path is bent by a guide member upstream of the pressure roller so that the path is not bent around the pressure roller itself.