Liquid Applying Apparatus with Pressure Adjustment for Inkjet Printing
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Solution Overview
Problem
Existing liquid applying apparatuses, such as those described in Japanese Patent Laid-Open No. 08-58069, suffer from variations in the amount of liquid applied due to individual variability in components, leading to inconsistent results in inkjet printing processes.
Innovation Solution
A liquid applying apparatus with an adjusting mechanism that uses a liquid holding member to form a controlled liquid holding space, allowing for precise adjustment of the liquid amount applied based on component variability, incorporating a rotating applying roller and a counter roller to ensure consistent application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a liquid holding chamber abuts against the roller to form a liquid chamber, then liquid leakage is prevented, but the amount of liquid applied to the medium varies due to individual variability in component conditions
Solution Approach 1:
The invention changes the critical parameter of liquid chamber pressure by introducing a pressure adjustment mechanism. The pressure adjustment member can vary the pressure within the liquid chamber, which directly controls the liquid amount transferred to the roller. This parameter change allows compensation for individual variability in component conditions (such as roller surface roughness) while maintaining reliable liquid containment through the abutting configuration.
2Ease of manufacture
If the roller surface roughness varies among individual rollers, then the abutment condition between chamber and roller changes, but this causes variation in the amount of liquid attached to the roller
Solution Approach 1:
The invention implements a feedback mechanism where the pressure adjustment member responds to variations in roller conditions. By monitoring the actual liquid transfer and adjusting the chamber pressure accordingly, the system compensates for individual roller variability. This feedback loop ensures consistent liquid application despite differences in roller surface roughness or other component variations.
3Reliability
If the liquid holding chamber is sealed to the roller, then liquid containment is improved, but adjustment of liquid application amount becomes difficult
Solution Approach 1:
The invention introduces dynamic adjustability to the sealed liquid holding chamber through the pressure adjustment member. This component allows the chamber pressure to be dynamically varied during operation, enabling precise control over liquid transfer to the roller. The dynamic pressure adjustment maintains the seal's reliability while providing operational flexibility for optimizing liquid application amounts.
Data Source
AI summary
An object of the present invention is to provide a liquid applying apparatus which can inhibit a variation in application amount associated with the individual variability of a component of the apparatus. According to the present invention, a liquid holding space in which a liquid is held is formed between the applying member and the liquid holding member. When the applying member moves, the liquid attached to the applying member is fed out of the liquid holding space together with the applying member. The liquid is applied to a medium. The application amount of liquid applied to the applying medium varies depending on the individual variability of a component such as a liquid applying member. The variation in liquid application amount is adjusted by adjusting section for adjusting, the rotation speed of the liquid holding member or the flow speed of the liquid flowing through the liquid holding space.