Liquid treatment agent coating device for inkjet printer, method of operating liquid treatment agent coating device, and image forming system

摘要

Disclosed is a liquid treatment agent coating device including a coating roller that coats a recording medium with a liquid treatment agent; a pressing roller that cooperates with the coating roller to nip and convey the recording medium; a first container that holds the coating roller and the liquid treatment agent, wherein the first container has an opening portion in the vicinity of a nip portion between the coating roller and the pressing roller; a second container that accommodates an amount of the liquid treatment agent held in the first container, wherein the second container has second airtightness that is greater than first airtightness of the first container; a removal channel extending from the first container to the second container; a first on-off valve disposed in the removal channel; and a return channel extending from the second container to the first container.

主权项

1. A liquid treatment agent coating device for an inkjet printer, the liquid treatment agent coating device comprising:
a coating roller configured to coat a recording medium with a liquid treatment agent prior to forming an image on the recording medium; a pressing roller configured to cooperate with the coating roller to nip and convey the recording medium, wherein the pressing roller is configured to transfer the liquid treatment agent on the coating roller by pressing the recording medium toward the coating roller; a first container configured to hold the coating roller and the liquid treatment agent, wherein the first container has an opening portion in the vicinity of a nip portion between the coating roller and the pressing roller; a second container configured to accommodate an amount of the liquid treatment agent held in the first container; a removal channel extending from the first container to the second container; a first on-off valve disposed in the removal channel; and a return channel extending from the second container to the first container, wherein the second container is disposed at a second position, the second position being lower than a first position at which the first container is disposed, wherein the first on-off valve disposed in the removal channel is a normal open type electromagnetic valve such that in a normal state where electricity is turned off, the electromagnetic valve is open, and wherein a pump is disposed in the return channel.