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Image forming apparatus

一种图像、废墨水的技术，应用在印刷等方向，能够解决影响泵寿命、机构不能动作、结构复杂等问题，达到增加装置整体尺寸、保持动作稳定性、降低成本的效果

Inactive Publication Date: 2008-09-03
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, the following problems still exist in the above-mentioned prior art: According to Patent Documents 1 and 2, the structure is complicated and the device is enlarged; in Patent Document 3, since the pigment component is not completely dissolved, the accumulation of ink cannot be prevented. and, in Patent Document 4, it is necessary to control the rotational speed of the conversion pump, so that the pump repeatedly changes the complex rotational speed, which affects the life of the pump; in Patent Document 5, the ink gradually adheres to the moving parts and enters the mechanism gap The ink sticks, causing the mechanism to fail to operate

Method used

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Examples

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Embodiment Construction

[0034] figure 1 is a schematic structural view of a general holding and restoring mechanism 10 applicable to the image forming apparatus of the present invention. When there are air bubbles and ink with increased viscosity in the inkjet head 11, the ink cannot be ejected normally, so use figure 1 The holding recovery mechanism 10 shown in , in which the cap 12 seals the nozzle face of the inkjet head 11, and uses a motor 14 as a driving source to drive a pump 15 and other pumping means, from the waste ink connected to the cap 12 through the tube 13 The bubble-generated and viscosity-increased ink in the inkjet head 11 is sucked so that the ink flows into the waste ink storage container 16, thereby maintaining the inkjet head in a normal state. When ink with high viscosity such as pigment is used, the solid ink accumulates in the waste ink storage container 16 . Especially in a low temperature environment, since the ink is easy to dry, the accumulation of solid ink is more ob...

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PUM

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Abstract

The invention provides an image forming apparatus wherein the structure is simplified and the whole size is not added, moreover, the action stability is highly ensured and the waste ink can be injected to the whole area of the ink reservoir. An image forming apparatus has a liquid discharge head to discharge droplets of a recording liquid to form an image on a recording medium and a maintenance-and-recovery mechanism to perform a maintenance and recovery operation on the liquid discharge head. The suction device takes suctions of the droplets of the recording liquid from the liquid discharge head. The suctioned droplets are not used for an image forming operation. The control unit controls a suction speed of the suction device. The drain reservoir stores the suctioned droplets drained from the drain tube. The control unit controls the suction speed of the suction device to change a drain speed of the suctioned droplets drained from the drain tube, wherein the drain tube is inclined relative to an opening portion of the drain reservoir.

Description

technical field [0001] The present invention relates to an image forming apparatus, and more specifically, relates to a technique for preventing waste ink ejected other than image formation from accumulating in one place. Background technique [0002] Image forming apparatuses such as printers, facsimile machines, copiers, multifunction peripherals, processors, and the like have a recording head that ejects recording liquid droplets using a liquid droplet ejection head. In an image forming apparatus using the above-mentioned droplet discharging head, a function of performing maintenance on the recording head is essential. For example, when waiting for printing, due to printing in a high-temperature or low-humidity environment, or printing at a low frequency, the viscosity of the recording liquid in the nozzle of the recording head increases, and nozzle clogging occurs. In order to solve this problem, an empty ejection operation is performed to eject liquid droplets not used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/165B41J2/185
CPCB41J2/16523B41J2/185B41J2/1721B41J2/17596
Inventor 久保勇
Owner RICOH KK