Application Roller Speed Feedback for Uniform Treatment Coating
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Solution Overview
Problem
Existing image forming apparatuses struggle to uniformly apply treatment agents onto media of varying types due to differences in linear velocities between application and conveyance rollers.
Innovation Solution
A treatment agent applicator with an application roller driven by a motor and encoder system that adjusts its rotational speed based on media type, using feedback control to maintain uniform application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the application roller is driven at a fixed linear velocity lower than the conveyance roller, then the application roller can rotate together with the conveyance roller in a linked manner, but it becomes impossible to uniformly apply treatment agent onto media of varying types
Solution Approach 1:
The application roller's linear velocity is changed from a fixed value to a dynamically adjustable parameter. The drive circuit varies the rotational speed of the application roller based on detected media type, allowing the system to adapt to different media characteristics while maintaining reliable treatment agent application uniformity for each specific media type
Solution Approach 2:
The linear velocity parameter of the application roller is modified according to media type. By detecting the media type and corresponding the linear velocity to predetermined values stored in memory, the system optimizes the application process for each media type, resolving the contradiction between uniformity and adaptability
2Adaptability or versatility
If feedback control is implemented with encoder to adjust application roller speed, then uniform application can be achieved on varying media types, but the device complexity increases
Solution Approach 1:
An encoder detects the rotational speed of the application roller and provides feedback to the drive circuit. This closed-loop control system automatically adjusts the roller speed to match the desired linear velocity for each media type, achieving adaptability without requiring complex manual control mechanisms
Solution Approach 2:
The system automatically determines the optimal linear velocity by detecting media type and retrieving corresponding predetermined values from memory. The feedback control system self-regulates the application roller speed without external intervention, reducing the need for complex external control devices
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables uniform application of treatment agents on diverse media types, reducing defects like paper jams and ensuring stable image formation.
Implementation Method 1
an encoder to detect a rotational speed of the driver
Data Source
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AI summary
A treatment agent applicator (108) includes an application roller (201) to apply a treatment agent onto a recording medium conveyed in a conveyance direction; a driver (206) to rotate the application roller (201); an encoder (207) to detect a rotational speed of the driver; a drive circuit (411) configured to perform feedback control on the driver to switch a linear velocity of the application roller based on the rotational speed detected by the encoder; and a controller (502) configured to control the drive circuit (411) to switch the linear velocity of the application roller (201) according to a type of recording medium.