Ink stain preventing mechanism

Abstract

The invention discloses an ink stain preventing mechanism, which comprises an upper paper guide base, wherein a top plate is hinged on the upper paper guide base through a rotating shaft; a through groove and a batten are arranged on the top plate; a rubber roller rack passes through the through groove; a support lug positioned above an edge of the through groove is formed on a side wall of the rubber roller rack; the bottom of the rubber roller rack is rotationally connected with a rubber roller; the rubber roller is arranged in a square hole on the upper paper guide base; the top of the rubber roller rack is connected with a pressure spring; the other end of the pressure spring is pressed against the bottom of a pressing plate which is arranged on the upper paper guide base; the batten is arranged on a circumferential surface of a driving wheel; and a driving gear coaxial to the driving wheel is connected to the driving wheel and is connected with an output end of a motor which is arranged on a back plate. The rubber roller can be lifted in the process of delivering paper from a printer, so that the rubber roller cannot damage non-dried ink marks or stain paper below, and the invention has the characteristics that the ink stain preventing mechanism is simple and reasonable in structure, convenient to mount and low in cost.

Description

technical field [0001] The invention relates to an antifouling ink mechanism, which belongs to the field of printer equipment design and manufacture. Background technique [0002] On the printer, in order to increase the paper pickup force of the printer paper guide device on the printing medium during the paper guide work, the paper pickup wheel with a larger contact area with the print medium is generally used instead of the paper pickup star wheel. It takes a certain amount of time for the ink to be absorbed. If the printing medium with ink dots but not completely absorbed is allowed to pass directly through the pickup roller, the pickup roller will inevitably destroy the wet ink on the printing medium and stick to the pickup roller. The ink stains will stain the paper behind, so the L-shaped or C-shaped paper feed channel is generally used on inkjet printers to keep the printing media with ink dots away from the pickup roller, but for inkjet printers where the printing m...

AI Technical Summary

Problems solved by technology

[0002] On the printer, in order to increase the paper pickup force of the printer paper guide device on the printing medium during the paper guide work, the paper pickup wheel with a larger contact area with the print medium is generally used instead of the paper pickup star wheel. It takes a certain amount of time for the ink to be absorbed. If the printing medium with ink dots but not completely absorbed is allowed to pass directly through the pickup roller, the pickup roller will inevitably destroy the wet ink on the printing medium and stick to the pickup roller. The ink stains will stain the paper behind, so the L-shaped or C-shaped paper feed channel is generally used on inkjet printers to keep the printing media with ink dots away from the pickup roller, but for inkjet printers where the printing media advances and exits , because the printing medium feeds in and out of the same channel, the printing medium with ink dots will inevitably pass under the pickup roller when it is out of the paper. In order not to damage the wet ink that has not been completely absorbed, it is necessary to The pickup roller can be lifted away from the print media so that the print media only relies on the anti-fouling ink mechanism derived from the pickup star wheel spaced apart from the pickup roller

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